{"id":7701,"date":"2024-12-06T12:21:55","date_gmt":"2024-12-06T12:21:55","guid":{"rendered":"https:\/\/marinesites.nl\/?p=7701"},"modified":"2024-12-06T12:21:55","modified_gmt":"2024-12-06T12:21:55","slug":"no-evidence-for-reduced-growth-in-resident-fish-species-in-the-era-of-de-eutrophication-in-a-coastal-area-in-nw-europe","status":"publish","type":"post","link":"https:\/\/marinesites.nl\/?p=7701","title":{"rendered":"No evidence for reduced growth in resident fish species in the era of de-eutrophication in a coastal area in NW Europe."},"content":{"rendered":"\n<p><strong>Find this article in link below:<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/www.researchgate.net\/publication\/351675334_No_evidence_for_reduced_growth_in_resident_fish_species_in_the_era_of_de-eutrophication_in_a_coastal_area_in_NW_Europe\" data-type=\"link\" data-id=\"https:\/\/www.researchgate.net\/publication\/351675334_No_evidence_for_reduced_growth_in_resident_fish_species_in_the_era_of_de-eutrophication_in_a_coastal_area_in_NW_Europe\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ResearchGate article<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Coastal areas in north-western Europe have been influenced by elevated nutrient levels starting in the 1960s. Due<br \/>\nto efficient measures, both nitrate and phosphate levels decreased since the mid-1980s. The co-occurring declines<br \/>\nin nutrient loadings and fish productivity are often presumed to be causally linked. We investigated whether four<br \/>\nresident fish species (twaite shad, bull-rout, thick-lipped grey mullet and eelpout), that spend the majority of<br \/>\ntheir life in the vicinity of the coast, differed in growth between the historic eutrophication period compared to<br \/>\nthe recent lower nutrient-level period. Based on Von Bertalanffy growth models of length at age, and the analysis<br \/>\nof annual otolith increments, we investigated the difference in sex-specific growth patterns and related these to<br \/>\ntemperature, eutrophication level (Chlorophyll a), growth window and fish density. In all four species, annual<br \/>\notolith growth rates during the early life stages differed between the two periods, mostly resulting in larger<br \/>\nlengths at age in the recent period. All species showed significant correlations between increment size and<br \/>\ntemperature, explaining the observed period differences. The lack of an effect of total fish biomass provided no<br \/>\nevidence for density dependent growth. A correlation with chlorophyll was found in bull-rout, but the relationship<br \/>\nwas negative, thus not supporting the idea of growth enhanced by high nutrient levels. In conclusion, we<br \/>\nfound no evidence for reduced growth related to de-eutrophication. Our results indicate that temperature rise<br \/>\ndue to climate change had a greater impact on growth than reduced food availability due to de-eutrophication.<br \/>\nWe discuss potential consequences of growth changes for length-based indicators used in management.<\/p>\n","protected":false},"author":1,"featured_media":6762,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-7701","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"_links":{"self":[{"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/posts\/7701","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/marinesites.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7701"}],"version-history":[{"count":1,"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/posts\/7701\/revisions"}],"predecessor-version":[{"id":7702,"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/posts\/7701\/revisions\/7702"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/marinesites.nl\/index.php?rest_route=\/wp\/v2\/media\/6762"}],"wp:attachment":[{"href":"https:\/\/marinesites.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7701"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/marinesites.nl\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7701"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/marinesites.nl\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}