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<!DOCTYPE html> <html > <head> <meta charset="utf-8"> <meta rel="search" type="application/opensearchdescription+xml" href="/open_search.xml" title="Academia.edu"> <meta content="width=device-width, initial-scale=1" name="viewport"> <meta name="google-site-verification" content="bKJMBZA7E43xhDOopFZkssMMkBRjvYERV-NaN4R6mrs"> <meta name="csrf-param" content="authenticity_token" /> <meta name="csrf-token" content="BCamVYxy0NBkBHnevh7BMmLmUFe9RtrEwlXjQ0bYITF793aEfdjeZ12c1p3yphiXK/6UyY+9OGYda13mIJSBXg==" /> <meta name="citation_title" content="Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids" /> <meta name="citation_author" content="Oliver Selz" /> <meta name="citation_author" content="ole seehausen" /> <meta name="twitter:card" content="summary" /> <meta name="twitter:url" content="https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids" /> <meta name="twitter:title" content="Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids" /> <meta name="twitter:description" content="Quantitative genetics theory predicts adaptive evolution to be constrained along evolutionary lines of least resistance. In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a" /> <meta name="twitter:image" content="https://0.academia-photos.com/2323640/734658/912090/s200_oliver.selz.jpg" /> <meta property="fb:app_id" content="2369844204" /> <meta property="og:type" content="article" /> <meta property="og:url" content="https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids" /> <meta property="og:title" content="Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids" /> <meta property="og:image" content="http://a.academia-assets.com/images/open-graph-icons/fb-paper.gif" /> <meta property="og:description" content="Quantitative genetics theory predicts adaptive evolution to be constrained along evolutionary lines of least resistance. In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a" /> <meta property="article:author" content="https://independent.academia.edu/OliverSelz" /> <meta property="article:author" content="https://independent.academia.edu/oleseehausen" /> <meta name="description" content="Quantitative genetics theory predicts adaptive evolution to be constrained along evolutionary lines of least resistance. In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a" /> <title>(PDF) Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids | Oliver Selz and ole seehausen - Academia.edu</title> <link rel="canonical" href="https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids" /> <script async src="https://www.googletagmanager.com/gtag/js?id=G-5VKX33P2DS"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-5VKX33P2DS', { cookie_domain: 'academia.edu', send_page_view: false, }); gtag('event', 'page_view', { 'controller': "single_work", 'action': "show", 'controller_action': 'single_work#show', 'logged_in': 'false', 'edge': 'unknown', // Send nil if there is no A/B test bucket, in case some records get logged // with missing data - that way we can distinguish between the two cases. // ab_test_bucket should be of the form <ab_test_name>:<bucket> 'ab_test_bucket': null, }) </script> <script> var $controller_name = 'single_work'; var $action_name = "show"; var $rails_env = 'production'; var $app_rev = '92477ec68c09d28ae4730a4143c926f074776319'; var $domain = 'academia.edu'; var $app_host = "academia.edu"; var $asset_host = "academia-assets.com"; var $start_time = new Date().getTime(); var $recaptcha_key = "6LdxlRMTAAAAADnu_zyLhLg0YF9uACwz78shpjJB"; var $recaptcha_invisible_key = "6Lf3KHUUAAAAACggoMpmGJdQDtiyrjVlvGJ6BbAj"; var $disableClientRecordHit = false; </script> <script> window.require = { config: function() { return function() {} } } </script> <script> window.Aedu = window.Aedu || {}; window.Aedu.hit_data = null; window.Aedu.serverRenderTime = new Date(1732787191000); window.Aedu.timeDifference = new Date().getTime() - 1732787191000; </script> <script type="application/ld+json">{"@context":"https://schema.org","@type":"ScholarlyArticle","abstract":"Quantitative genetics theory predicts adaptive evolution to be constrained along evolutionary lines of least resistance. In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a population and eventually change its evolutionary potential, but empirical evidence is still scarce. Using closely related species pairs of Lake Victoria cichlids sampled from four different islands with different levels of interspecific gene flow, we tested for potential effects of introgressive hybridization on phenotypic evolution in wild populations. We found that these effects differed among our study species. Constraints measured as the eccentricity of phenotypic variance–covariance matrices declined significantly with increasing gene flow in the less abundant species for matrices that have a diverged line of least resistance. In contrast, we find no such decline for the more abundant species. Overall our results suggest that hybridization can change the underlying pheno-typic variance–covariance matrix, potentially increasing the adaptive potential of such populations.","author":[{"@context":"https://schema.org","@type":"Person","name":"Oliver Selz"},{"@context":"https://schema.org","@type":"Person","name":"ole seehausen"}],"contributor":[{"@context":"https://schema.org","@type":"Person","name":"ole seehausen"}],"dateCreated":"2016-11-24","dateModified":null,"datePublished":null,"headline":"Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids","inLanguage":"en","keywords":["Speciation","Hybridization","Cichlidae","Covariance Matrix","Cichlids Fishes"],"locationCreated":null,"publication":null,"publisher":{"@context":"https://schema.org","@type":"Organization","name":null},"image":null,"thumbnailUrl":null,"url":"https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids","sourceOrganization":[{"@context":"https://schema.org","@type":"EducationalOrganization","name":null}]}</script><link rel="stylesheet" media="all" href="//a.academia-assets.com/assets/single_work_page/loswp-102fa537001ba4d8dcd921ad9bd56c474abc201906ea4843e7e7efe9dfbf561d.css" /><link rel="stylesheet" media="all" href="//a.academia-assets.com/assets/design_system/body-8d679e925718b5e8e4b18e9a4fab37f7eaa99e43386459376559080ac8f2856a.css" /><link rel="stylesheet" media="all" href="//a.academia-assets.com/assets/design_system/button-3cea6e0ad4715ed965c49bfb15dedfc632787b32ff6d8c3a474182b231146ab7.css" /><link rel="stylesheet" media="all" 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In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a population and eventually change its evolutionary potential, but empirical evidence is still scarce. Using closely related species pairs of Lake Victoria cichlids sampled from four different islands with different levels of interspecific gene flow, we tested for potential effects of introgressive hybridization on phenotypic evolution in wild populations. We found that these effects differed among our study species. Constraints measured as the eccentricity of phenotypic variance–covariance matrices declined significantly with increasing gene flow in the less abundant species for matrices that have a diverged line of least resistance. In contrast, we find no such decline for the more abundant species. Overall our results suggest that hybridization can change the underlying pheno-typic variance–covariance matrix, potentially increasing the adaptive potential of such populations."},"document_type":"paper","pre_hit_view_count_baseline":null,"quality":"high","language":"en","title":"Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids","broadcastable":true,"draft":false,"has_indexable_attachment":true,"indexable":true}}["work"]; window.loswp.workCoauthors = [2323640,7541539]; window.loswp.locale = "en"; window.loswp.countryCode = "SG"; window.loswp.cwvAbTestBucket = ""; window.loswp.designVariant = "ds_vanilla"; window.loswp.fullPageMobileSutdModalVariant = "control"; window.loswp.useOptimizedScribd4genScript = false; window.loswp.appleClientId = 'edu.academia.applesignon';</script><script defer="" src="https://accounts.google.com/gsi/client"></script><div class="ds-loswp-container"><div class="ds-work-card--grid-container"><div class="ds-work-card--container js-loswp-work-card"><div class="ds-work-card--cover"><div class="ds-work-cover--wrapper"><div class="ds-work-cover--container"><button class="ds-work-cover--clickable js-swp-download-button" data-signup-modal="{"location":"swp-splash-paper-cover","attachmentId":50519344,"attachmentType":"pdf"}"><img alt="First page of “Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids”" class="ds-work-cover--cover-thumbnail" src="https://0.academia-photos.com/attachment_thumbnails/50519344/mini_magick20190128-10615-n4pj1y.png?1548745611" /><img alt="PDF Icon" class="ds-work-cover--file-icon" src="//a.academia-assets.com/assets/single_work_splash/adobe.icon-574afd46eb6b03a77a153a647fb47e30546f9215c0ee6a25df597a779717f9ef.svg" /><div class="ds-work-cover--hover-container"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span><p>Download Free PDF</p></div><div class="ds-work-cover--ribbon-container">Download Free PDF</div><div class="ds-work-cover--ribbon-triangle"></div></button></div></div></div><div class="ds-work-card--work-information"><h1 class="ds-work-card--work-title">Effects of interspecific gene flow on the phenotypic variance–covariance matrix in Lake Victoria Cichlids</h1><div class="ds-work-card--work-authors ds-work-card--detail"><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="2323640" href="https://independent.academia.edu/OliverSelz"><img alt="Profile image of Oliver Selz" class="ds-work-card--author-avatar" src="https://0.academia-photos.com/2323640/734658/912090/s65_oliver.selz.jpg" />Oliver Selz</a><a class="ds-work-card--author js-wsj-grid-card-author ds2-5-body-md ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen"><img alt="Profile image of ole seehausen" class="ds-work-card--author-avatar" src="//a.academia-assets.com/images/s65_no_pic.png" />ole seehausen</a></div><div class="ds-work-card--detail"></div><p class="ds-work-card--work-abstract ds-work-card--detail ds2-5-body-md">Quantitative genetics theory predicts adaptive evolution to be constrained along evolutionary lines of least resistance. In theory, hybridization and subsequent interspecific gene flow may, however, rapidly change the evolutionary constraints of a population and eventually change its evolutionary potential, but empirical evidence is still scarce. Using closely related species pairs of Lake Victoria cichlids sampled from four different islands with different levels of interspecific gene flow, we tested for potential effects of introgressive hybridization on phenotypic evolution in wild populations. We found that these effects differed among our study species. Constraints measured as the eccentricity of phenotypic variance–covariance matrices declined significantly with increasing gene flow in the less abundant species for matrices that have a diverged line of least resistance. In contrast, we find no such decline for the more abundant species. Overall our results suggest that hybridization can change the underlying pheno-typic variance–covariance matrix, potentially increasing the adaptive potential of such populations.</p><div class="ds-work-card--button-container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--work-card","attachmentId":50519344,"attachmentType":"pdf","workUrl":"https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids"}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--work-card","attachmentId":50519344,"attachmentType":"pdf","workUrl":"https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids"}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div></div><div data-auto_select="false" data-client_id="331998490334-rsn3chp12mbkiqhl6e7lu2q0mlbu0f1b" data-doc_id="50519344" data-landing_url="https://www.academia.edu/30070394/Effects_of_interspecific_gene_flow_on_the_phenotypic_variance_covariance_matrix_in_Lake_Victoria_Cichlids" data-login_uri="https://www.academia.edu/registrations/google_one_tap" data-moment_callback="onGoogleOneTapEvent" id="g_id_onload"></div><div class="ds-top-related-works--grid-container"><div class="ds-related-content--container ds-top-related-works--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="0" data-entity-id="35746163" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/35746163/Prevalence_of_disruptive_selection_predicts_extent_of_species_differentiation_in_Lake_Victoria_cichlids">Prevalence of disruptive selection predicts extent of species differentiation in Lake Victoria cichlids</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="75674058" href="https://independent.academia.edu/DavidFrei1">David Frei</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="75822323" href="https://independent.academia.edu/MoserFlorian">Florian Moser</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="534684" href="https://wageningen-ur.academia.edu/JaccovanRijssel">Jacco van Rijssel</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--abstract ds2-5-body-sm">Theory suggests that speciation with gene flow is most likely when both sexual and ecological selection are divergent or disruptive. Divergent sexual and natural selection on the visual system have been demonstrated before in sympatric, morphologically similar sister species of Lake Victoria cichlids, but this does not explain the subtle morphological differences between them. To investigate the significance of natural selection on morphology during speciation, we here ask whether the prevalence of disruptive ecological selection differs between sympatric sister species that are at different stages of speciation. Some of our species pairs do (Pundamilia) and others do not (Neochromis) differ distinctively in sexually selected male nuptial coloration. We find that (i) evidence for disruptive selection, and for evolutionary response to it, is prevalent in traits that are differentiated between sister species; (ii) prevalence of both predicts the extent of genetic differentiation; and (iii) genetic differentiation is weaker in species pairs with conserved male nuptial coloration. Our results speak to the existence of two different mechanisms of speciation with gene flow: speciation mainly by sexual selection tightly followed by ecological character displacement in some cases and speciation mainly by divergent ecological selection in others.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Prevalence of disruptive selection predicts extent of species differentiation in Lake Victoria cichlids","attachmentId":55621169,"attachmentType":"pdf","work_url":"https://www.academia.edu/35746163/Prevalence_of_disruptive_selection_predicts_extent_of_species_differentiation_in_Lake_Victoria_cichlids","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/35746163/Prevalence_of_disruptive_selection_predicts_extent_of_species_differentiation_in_Lake_Victoria_cichlids"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="1" data-entity-id="14698471" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/14698471/Community_Genetics_Reveal_Elevated_Levels_of_Sympatric_Gene_Flow_among_Morphologically_Similar_but_Not_among_Morphologically_Dissimilar_Species_of_Lake_Victoria_Cichlid_Fish">Community Genetics Reveal Elevated Levels of Sympatric Gene Flow among Morphologically Similar but Not among Morphologically Dissimilar Species of Lake Victoria Cichlid Fish</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33649473" href="https://independent.academia.edu/MartijnEgas">Martijn Egas</a></div><p class="ds-related-work--metadata ds2-5-body-xs">International Journal of Evolutionary Biology, 2011</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Community Genetics Reveal Elevated Levels of Sympatric Gene Flow among Morphologically Similar but Not among Morphologically Dissimilar Species of Lake Victoria Cichlid Fish","attachmentId":43966561,"attachmentType":"pdf","work_url":"https://www.academia.edu/14698471/Community_Genetics_Reveal_Elevated_Levels_of_Sympatric_Gene_Flow_among_Morphologically_Similar_but_Not_among_Morphologically_Dissimilar_Species_of_Lake_Victoria_Cichlid_Fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/14698471/Community_Genetics_Reveal_Elevated_Levels_of_Sympatric_Gene_Flow_among_Morphologically_Similar_but_Not_among_Morphologically_Dissimilar_Species_of_Lake_Victoria_Cichlid_Fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="2" data-entity-id="69611805" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/69611805/Evolutionary_divergence_in_replicate_pairs_of_ecotypes_of_Lake_Victoria_cichlid_fish">Evolutionary divergence in replicate pairs of ecotypes of Lake Victoria cichlid fish</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Evolutionary Ecology Research, 2012</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Evolutionary divergence in replicate pairs of ecotypes of Lake Victoria cichlid fish","attachmentId":79640126,"attachmentType":"pdf","work_url":"https://www.academia.edu/69611805/Evolutionary_divergence_in_replicate_pairs_of_ecotypes_of_Lake_Victoria_cichlid_fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/69611805/Evolutionary_divergence_in_replicate_pairs_of_ecotypes_of_Lake_Victoria_cichlid_fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="3" data-entity-id="28293221" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/28293221/Genetic_linkage_of_distinct_adaptive_traits_in_sympatrically_speciating_crater_lake_cichlid_fish">Genetic linkage of distinct adaptive traits in sympatrically speciating crater lake cichlid fish</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="25663965" href="https://muni.academia.edu/VieraKovacova">Viera Kovacova</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="8742" href="https://qut.academia.edu/CarmeloFruciano">Carmelo Fruciano</a></div><p class="ds-related-work--abstract ds2-5-body-sm">Our understanding of how biological diversity arises is limited, especially in the case of speciation in the face of gene flow. Here we investigate the genomic basis of adaptive traits, focusing on a sympatrically diverging species pair of crater lake cichlid fishes. We identify the main quantitative trait loci (QTL) for two eco-morphological traits: body shape and phar-yngeal jaw morphology. These traits diverge in parallel between benthic and limnetic species in the repeated adaptive radiations of this and other fish lineages. Remarkably, a single chromosomal region contains the highest effect size QTL for both traits. Transcriptomic data show that the QTL regions contain genes putatively under selection. Independent population genomic data corroborate QTL regions as areas of high differentiation between the sympatric sister species. Our results provide empirical support for current theoretical models that emphasize the importance of genetic linkage and pleiotropy in facilitating rapid divergence in sympatry.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Genetic linkage of distinct adaptive traits in sympatrically speciating crater lake cichlid fish","attachmentId":48625053,"attachmentType":"pdf","work_url":"https://www.academia.edu/28293221/Genetic_linkage_of_distinct_adaptive_traits_in_sympatrically_speciating_crater_lake_cichlid_fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/28293221/Genetic_linkage_of_distinct_adaptive_traits_in_sympatrically_speciating_crater_lake_cichlid_fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="4" data-entity-id="18886649" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/18886649/Divergent_selection_and_phenotypic_plasticity_during_incipient_speciation_in_Lake_Victoria_cichlid_fish">Divergent selection and phenotypic plasticity during incipient speciation in Lake Victoria cichlid fish</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Evolutionary Biology, 2009</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Divergent selection and phenotypic plasticity during incipient speciation in Lake Victoria cichlid fish","attachmentId":40311015,"attachmentType":"pdf","work_url":"https://www.academia.edu/18886649/Divergent_selection_and_phenotypic_plasticity_during_incipient_speciation_in_Lake_Victoria_cichlid_fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/18886649/Divergent_selection_and_phenotypic_plasticity_during_incipient_speciation_in_Lake_Victoria_cichlid_fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="5" data-entity-id="120317202" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/120317202/Progressive_levels_of_trait_divergence_along_a_speciation_transect_in_the_Lake_Victoria_cichlid_fish_Pundamilia">Progressive levels of trait divergence along a ‘speciation transect’ in the Lake Victoria cichlid fish Pundamilia</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Speciation and Patterns of Diversity</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Progressive levels of trait divergence along a ‘speciation transect’ in the Lake Victoria cichlid fish Pundamilia","attachmentId":115507514,"attachmentType":"pdf","work_url":"https://www.academia.edu/120317202/Progressive_levels_of_trait_divergence_along_a_speciation_transect_in_the_Lake_Victoria_cichlid_fish_Pundamilia","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/120317202/Progressive_levels_of_trait_divergence_along_a_speciation_transect_in_the_Lake_Victoria_cichlid_fish_Pundamilia"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="6" data-entity-id="18886611" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/18886611/Relaxed_trait_covariance_in_interspecific_cichlid_hybrids_predicts_morphological_diversity_in_adaptive_radiations">Relaxed trait covariance in interspecific cichlid hybrids predicts morphological diversity in adaptive radiations</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Evolutionary Biology, 2014</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Relaxed trait covariance in interspecific cichlid hybrids predicts morphological diversity in adaptive radiations","attachmentId":40310987,"attachmentType":"pdf","work_url":"https://www.academia.edu/18886611/Relaxed_trait_covariance_in_interspecific_cichlid_hybrids_predicts_morphological_diversity_in_adaptive_radiations","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/18886611/Relaxed_trait_covariance_in_interspecific_cichlid_hybrids_predicts_morphological_diversity_in_adaptive_radiations"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="7" data-entity-id="18886715" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/18886715/Population_genomic_signatures_of_divergent_adaptation_gene_flow_and_hybrid_speciation_in_the_rapid_radiation_of_Lake_Victoria_cichlid_fishes">Population genomic signatures of divergent adaptation, gene flow and hybrid speciation in the rapid radiation of Lake Victoria cichlid fishes</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Molecular Ecology, 2013</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Population genomic signatures of divergent adaptation, gene flow and hybrid speciation in the rapid radiation of Lake Victoria cichlid fishes","attachmentId":40311045,"attachmentType":"pdf","work_url":"https://www.academia.edu/18886715/Population_genomic_signatures_of_divergent_adaptation_gene_flow_and_hybrid_speciation_in_the_rapid_radiation_of_Lake_Victoria_cichlid_fishes","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/18886715/Population_genomic_signatures_of_divergent_adaptation_gene_flow_and_hybrid_speciation_in_the_rapid_radiation_of_Lake_Victoria_cichlid_fishes"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="8" data-entity-id="18886553" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/18886553/Phenotypic_novelty_in_experimental_hybrids_is_predicted_by_the_genetic_distance_between_species_of_cichlid_fish">Phenotypic novelty in experimental hybrids is predicted by the genetic distance between species of cichlid fish</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="39191901" href="https://independent.academia.edu/SchmidCorinne">Corinne Schmid</a><span>, </span><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">BMC Evolutionary Biology, 2009</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Phenotypic novelty in experimental hybrids is predicted by the genetic distance between species of cichlid fish","attachmentId":40310949,"attachmentType":"pdf","work_url":"https://www.academia.edu/18886553/Phenotypic_novelty_in_experimental_hybrids_is_predicted_by_the_genetic_distance_between_species_of_cichlid_fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/18886553/Phenotypic_novelty_in_experimental_hybrids_is_predicted_by_the_genetic_distance_between_species_of_cichlid_fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-wsj-grid-card" data-collection-position="9" data-entity-id="44950705" data-sort-order="default"><a class="ds-related-work--title js-wsj-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/44950705/Ontogenetic_divergence_generates_novel_phenotypes_in_hybrid_cichlids">Ontogenetic divergence generates novel phenotypes in hybrid cichlids</a><div class="ds-related-work--metadata"><a class="js-wsj-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="8300075" href="https://csic.academia.edu/JavierHSantosSantos">Javier H . Santos-Santos</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Anatomy, 2021</p><p class="ds-related-work--abstract ds2-5-body-sm">Hybridization is suggested to contribute to ecomorphological and taxonomic diversity in lacustrine East African cichlids. This is supported by studies demonstrating that genetic diversity within lake radiations has been influenced by hybridization events, leading to extensive phenotypic differentiation of genetically closely related species. Hybrid persistence and speciation in sympatry with gene flow can be explained by pleiotropy in traits involved in reproductive isolation; however, little attention has been given to how trait differentiation is established during hybrid ontogeny, and how this may relate to trophic and locomotor specialization. This study compares body shape changes in a Lake Victoria cichlid hybrid throughout its post-hatch ontogeny to those of its parental species. Across the considered age/size categories, hybrids occupy a distinct and intermediate morphological space, yet where several transgressive traits emerge. A between-group principal component analysis on body shapes across size categories reveals axes of shape variation exclusive to the hybrids in the youngest/ smallest size categories. Shape differences in the hybrids involved morphological traits known to be implicated in trophic and locomotor specializations in the parental species. Combined, our findings suggest that phenotypic divergence in the hybrid can lead to functional differences that may potentially release them to some degree from competition with the parental species. These findings agree with recent literature that addresses the potential importance of hybridization for the unusually recent origin of the Lake Victoria cichlid super-species flock.</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Ontogenetic divergence generates novel phenotypes in hybrid cichlids","attachmentId":65480985,"attachmentType":"pdf","work_url":"https://www.academia.edu/44950705/Ontogenetic_divergence_generates_novel_phenotypes_in_hybrid_cichlids","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-wsj-grid-card-view-pdf" href="https://www.academia.edu/44950705/Ontogenetic_divergence_generates_novel_phenotypes_in_hybrid_cichlids"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div></div></div><div class="ds-sticky-ctas--wrapper js-loswp-sticky-ctas hidden"><div class="ds-sticky-ctas--grid-container"><div class="ds-sticky-ctas--container"><button class="ds2-5-button js-swp-download-button" data-signup-modal="{"location":"continue-reading-button--sticky-ctas","attachmentId":50519344,"attachmentType":"pdf","workUrl":null}">See full PDF</button><button class="ds2-5-button ds2-5-button--secondary js-swp-download-button" data-signup-modal="{"location":"download-pdf-button--sticky-ctas","attachmentId":50519344,"attachmentType":"pdf","workUrl":null}"><span class="material-symbols-outlined" style="font-size: 20px" translate="no">download</span>Download PDF</button></div></div></div><div class="ds-below-fold--grid-container"><div class="ds-work--container js-loswp-embedded-document"><div class="attachment_preview" data-attachment="Attachment_50519344" style="display: none"><div class="js-scribd-document-container"><div class="scribd--document-loading js-scribd-document-loader" style="display: block;"><img alt="Loading..." src="//a.academia-assets.com/images/loaders/paper-load.gif" /><p>Loading Preview</p></div></div><div style="text-align: center;"><div class="scribd--no-preview-alert js-preview-unavailable"><p>Sorry, preview is currently unavailable. You can download the paper by clicking the button above.</p></div></div></div></div><div class="ds-sidebar--container js-work-sidebar"><div class="ds-related-content--container"><h2 class="ds-related-content--heading">Related papers</h2><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="0" data-entity-id="18886653" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/18886653/A_test_of_fitness_consequences_of_hybridization_in_sibling_species_of_Lake_Victoria_cichlid_fish">A test of fitness consequences of hybridization in sibling species of Lake Victoria cichlid fish</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Journal of Evolutionary Biology, 2008</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"A test of fitness consequences of hybridization in sibling species of Lake Victoria cichlid fish","attachmentId":40311019,"attachmentType":"pdf","work_url":"https://www.academia.edu/18886653/A_test_of_fitness_consequences_of_hybridization_in_sibling_species_of_Lake_Victoria_cichlid_fish","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/18886653/A_test_of_fitness_consequences_of_hybridization_in_sibling_species_of_Lake_Victoria_cichlid_fish"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="1" data-entity-id="83750272" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/83750272/Genomic_Signatures_for_Species_Specific_Adaptation_in_Lake_Victoria_Cichlids_Derived_from_Large_Scale_Standing_Genetic_Variation">Genomic Signatures for Species-Specific Adaptation in Lake Victoria Cichlids Derived from Large-Scale Standing Genetic Variation</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="224586331" href="https://independent.academia.edu/harunanakamura2">haruna nakamura</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Molecular Biology and Evolution, 2021</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Genomic Signatures for Species-Specific Adaptation in Lake Victoria Cichlids Derived from Large-Scale Standing Genetic Variation","attachmentId":88994319,"attachmentType":"pdf","work_url":"https://www.academia.edu/83750272/Genomic_Signatures_for_Species_Specific_Adaptation_in_Lake_Victoria_Cichlids_Derived_from_Large_Scale_Standing_Genetic_Variation","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/83750272/Genomic_Signatures_for_Species_Specific_Adaptation_in_Lake_Victoria_Cichlids_Derived_from_Large_Scale_Standing_Genetic_Variation"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="2" data-entity-id="14339167" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/14339167/Additive_genetic_variance_of_quantitative_traits_in_natural_and_pond_bred_populations_of_the_Lake_Tanganyika_cichlid_Tropheus_moorii">Additive genetic variance of quantitative traits in natural and pond-bred populations of the Lake Tanganyika cichlid Tropheus moorii</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33289322" href="https://uni-graz.academia.edu/CSturmbauer">C. Sturmbauer</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Hydrobiologia, 2012</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Additive genetic variance of quantitative traits in natural and pond-bred populations of the Lake Tanganyika cichlid Tropheus moorii","attachmentId":44308731,"attachmentType":"pdf","work_url":"https://www.academia.edu/14339167/Additive_genetic_variance_of_quantitative_traits_in_natural_and_pond_bred_populations_of_the_Lake_Tanganyika_cichlid_Tropheus_moorii","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/14339167/Additive_genetic_variance_of_quantitative_traits_in_natural_and_pond_bred_populations_of_the_Lake_Tanganyika_cichlid_Tropheus_moorii"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="3" data-entity-id="58821469" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/58821469/Geography_disentangles_introgression_from_ancestral_polymorphism_in_Lake_Malawi_cichlids">Geography disentangles introgression from ancestral polymorphism in Lake Malawi cichlids</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="33059628" href="https://utk.academia.edu/BenjaminFitzpatrick">Benjamin Fitzpatrick</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Molecular Ecology, 2010</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Geography disentangles introgression from ancestral polymorphism in Lake Malawi cichlids","attachmentId":73047639,"attachmentType":"pdf","work_url":"https://www.academia.edu/58821469/Geography_disentangles_introgression_from_ancestral_polymorphism_in_Lake_Malawi_cichlids","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" 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ds2-5-body-xs">Molecular biology and evolution, 2018</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline js-swp-download-button" data-signup-modal="{"location":"wsj-grid-card-download-pdf-modal","work_title":"Genomics of parallel ecological speciation in Lake Victoria cichlids","attachmentId":79640142,"attachmentType":"pdf","work_url":"https://www.academia.edu/69611821/Genomics_of_parallel_ecological_speciation_in_Lake_Victoria_cichlids","alternativeTracking":true}"><span class="material-symbols-outlined" style="font-size: 18px" translate="no">download</span><span class="ds2-5-text-link__content">Download free PDF</span></button><a class="ds2-5-text-link ds2-5-text-link--inline js-related-work-grid-card-view-pdf" href="https://www.academia.edu/69611821/Genomics_of_parallel_ecological_speciation_in_Lake_Victoria_cichlids"><span class="ds2-5-text-link__content">View PDF</span><span class="material-symbols-outlined" style="font-size: 18px" translate="no">chevron_right</span></a></div></div><div class="ds-related-work--container js-related-work-sidebar-card" data-collection-position="5" data-entity-id="111466778" data-sort-order="default"><a class="ds-related-work--title js-related-work-grid-card-title ds2-5-body-md ds2-5-body-link" href="https://www.academia.edu/111466778/The_coincidence_of_ecological_opportunity_with_hybridization_explains_rapid_adaptive_radiation_in_Lake_Mweru_cichlids">The coincidence of ecological opportunity with hybridization explains rapid adaptive radiation in Lake Mweru cichlids</a><div class="ds-related-work--metadata"><a class="js-related-work-grid-card-author ds2-5-body-sm ds2-5-body-link" data-author-id="7541539" href="https://independent.academia.edu/oleseehausen">ole seehausen</a></div><p class="ds-related-work--metadata ds2-5-body-xs">Zenodo (CERN European Organization for Nuclear Research), 2019</p><div class="ds-related-work--ctas"><button class="ds2-5-text-link ds2-5-text-link--inline 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