{"id":50410,"date":"2023-08-17T15:27:22","date_gmt":"2023-08-17T15:27:22","guid":{"rendered":"https:\/\/matis.is\/?p=50410"},"modified":"2023-08-17T15:27:24","modified_gmt":"2023-08-17T15:27:24","slug":"synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories","status":"publish","type":"post","link":"https:\/\/matis.is\/en\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/","title":{"rendered":"Synchronous changes in length at maturity across four species of Lake Erie fish with different harvest histories."},"content":{"rendered":"<p>Decreases in size at maturation in harvested fish populations can reduce productivity and resilience. Delineating the causes for these changes in maturation is challenging. We assessed harvest and large-scale ecosystem variability as causes for changes in maturation in four Lake Erie fishes. Regulated harvests of yellow perch (<em>Perca flavescens<\/em>) and walleye (<em>Sander vitreous<\/em>) are greater than unregulated harvests of white perch (<em>Morone americana<\/em>) and white bass (<em>Morone chrysops<\/em>). Our assessment considered cohort data from 1991 to 2012 for each species. We used a conceptual model of harvest-induced plasticity to show that changes in female length at 50% maturity (<em>L<\/em>\u00a0<sub>50<\/sub>) were unrelated to harvest intensity in all species. We then demonstrated that changes in females\u00a0<em>L<\/em>\u00a0<sub>50<\/sub>\u00a0among cohorts were synchronous across species. Post hoc analysis of variables capturing year-to-year variation in climatic and lake conditions suggested\u00a0<em>L<\/em>\u00a0<sub>50<\/sub>\u00a0was larger when water levels were near the norm for the study period and smaller at low and high levels. We conclude that changes in\u00a0<em>L<\/em>\u00a0<sub>50<\/sub>\u00a0were most strongly related to ecosystem changes unrelated to harvest intensity.<\/p>\n\n\n\n<p><a href=\"https:\/\/cdnsciencepub.com\/doi\/10.1139\/cjfas-2019-0408\" target=\"_blank\" rel=\"noreferrer noopener\">Link to article. <\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Decreases in size at maturation in harvested fish populations can reduce productivity and resilience. Delineating the causes for these changes [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"template-greinar.php","format":"standard","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2011],"tags":[],"class_list":["post-50410","post","type-post","status-publish","format-standard","hentry","category-greinar"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Synchronous changes in length at maturity across four species of Lake Erie fish with different harvest histories. - Mat\u00eds<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/matis.is\/en\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Synchronous changes in length at maturity across four species of Lake Erie fish with different harvest histories. - Mat\u00eds\" \/>\n<meta property=\"og:description\" content=\"Decreases in size at maturation in harvested fish populations can reduce productivity and resilience. Delineating the causes for these changes [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/matis.is\/en\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\" \/>\n<meta property=\"og:site_name\" content=\"Mat\u00eds\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/matisiceland\" \/>\n<meta property=\"article:published_time\" content=\"2023-08-17T15:27:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-08-17T15:27:24+00:00\" \/>\n<meta name=\"author\" content=\"hilduryr@matis.is\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@matisiceland\" \/>\n<meta name=\"twitter:site\" content=\"@matisiceland\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"hilduryr@matis.is\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/matis.is\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/matis.is\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\"},\"author\":{\"name\":\"hilduryr@matis.is\",\"@id\":\"https:\/\/matis.is\/#\/schema\/person\/faae87f165f723ee4cb619d6bc8a9203\"},\"headline\":\"Synchronous changes in length at maturity across four species of Lake Erie fish with different harvest histories.\",\"datePublished\":\"2023-08-17T15:27:22+00:00\",\"dateModified\":\"2023-08-17T15:27:24+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/matis.is\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\"},\"wordCount\":190,\"publisher\":{\"@id\":\"https:\/\/matis.is\/#organization\"},\"articleSection\":[\"Greinar\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/matis.is\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\",\"url\":\"https:\/\/matis.is\/greinar\/synchronous-changes-in-length-at-maturity-across-four-species-of-lake-erie-fish-with-different-harvest-histories\/\",\"name\":\"Synchronous changes in length at maturity across four species of Lake Erie fish with different harvest histories. - 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