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In this study, we have estimated heritabilities of two growth traits (body weight and length) and of cortisol response to confinement stress in the European sea bass.<\/jats:p><\/jats:sec><jats:sec><jats:title>Findings<\/jats:title><jats:p>The F1 progeny analysed (n\u2009=\u2009922) belonged to a small effective breeding population with contributions from an unbalanced family structure of just 10 males and 2 females. Heritability values ranged from 0.54 (\u00b10.21) for body weight to 0.65 (\u00b10.22) for standard body length and were low for cortisol response i.e. 0.08 (\u00b10.06). Genetic correlations were positive (0.94) between standard body length and body weight and negative between cortisol and body weight and between cortisol and standard body length (\u22120.60 and \u22120.55, respectively).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>This study confirms that in European sea bass, heritability of growth-related traits is high and that selection on such traits has potential. However, heritability of cortisol response to stress is low in European sea bass and since it is known to vary greatly among species, further studies are necessary to understand the reasons for these differences.<\/jats:p><\/jats:sec>","DOI":"10.1186\/1297-9686-44-15","type":"journal-article","created":{"date-parts":[[2012,4,20]],"date-time":"2012-04-20T16:14:20Z","timestamp":1334938460000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":31,"title":["Heritability of cortisol response to confinement stress in European sea bass dicentrarchus labrax"],"prefix":"10.1186","volume":"44","author":[{"given":"Filip AM","family":"Volckaert","sequence":"first","affiliation":[]},{"given":"Bart","family":"Hellemans","sequence":"additional","affiliation":[]},{"given":"Costas","family":"Batargias","sequence":"additional","affiliation":[]},{"given":"Bruno","family":"Louro","sequence":"additional","affiliation":[]},{"given":"C\u00e9cile","family":"Massault","sequence":"additional","affiliation":[]},{"given":"Jeroen K J","family":"Van Houdt","sequence":"additional","affiliation":[]},{"given":"Chris","family":"Haley","sequence":"additional","affiliation":[]},{"given":"Dirk-Jan","family":"de Koning","sequence":"additional","affiliation":[]},{"given":"Adelino VM","family":"Canario","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2012,4,20]]},"reference":[{"key":"2527_CR1","first-page":"197","volume-title":"The state of the world fisheries and aquaculture","author":"FAO","year":"2010","unstructured":"FAO: The state of the world fisheries and aquaculture. 2010, Food and Agriculture Organization of the United Nations, Rome, 197. 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