Title: Physiological improvement in the copepod<i>Eurytemora affinis</i>through thermal and multi-generational selection
Abstract: Aquaculture ResearchVolume 47, Issue 7 p. 2227-2242 Original Article Physiological improvement in the copepod Eurytemora affinis through thermal and multi-generational selection Anissa Souissi, Corresponding Author Anissa Souissi Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux, FranceCorrespondence: A Souissi, Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux F-62930, France. E-mail: [email protected]Search for more papers by this authorSami Souissi, Sami Souissi Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux, FranceSearch for more papers by this authorBenni W Hansen, Benni W Hansen Department of Environmental, Social and Spatial Change, Roskilde University, Roskilde, DenmarkSearch for more papers by this author Anissa Souissi, Corresponding Author Anissa Souissi Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux, FranceCorrespondence: A Souissi, Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux F-62930, France. E-mail: [email protected]Search for more papers by this authorSami Souissi, Sami Souissi Laboratoire d'Océanologie et de Géosciences, CNRS, UMR 8187 LOG, Station Marine, Université Lille 1, Wimereux, FranceSearch for more papers by this authorBenni W Hansen, Benni W Hansen Department of Environmental, Social and Spatial Change, Roskilde University, Roskilde, DenmarkSearch for more papers by this author First published: 31 December 2014 https://doi.org/10.1111/are.12675Citations: 21Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract As a major part of fish larval diet in nature, copepods constitute an appropriate live prey for aquaculture purposes. Considering the difficulty of mastering copepod mass production, studies on their growth performance at different environmental conditions are needed to improve their productivity. In this study a new selective approach based on temperature control is proposed to improve the physiological (body size, fecundity and lipid storage) performance of copepods. The estuarine copepod Eurytemora affinis known to have a high genetic variance in temperature tolerance was used as a biological model. First two different copepod lines were obtained after long-term culture at constant cold (7°C) and warm (20°C) temperatures. Then both populations were transferred to a higher temperature of 24°C appropriate for aquaculture use and followed during five generations. During the first two generations (F1–F2) of a cold-acclimated population, female body size and fecundity decreased significantly whereas the survival rate remained high. The high lipid content of this population was used by females to compensate the heat shock of more than 10°C. However, the survival rate decreased dramatically in F3 but allowed the selection of robust individuals which progressively improved their fitness during the following generations. So, compared to the warm acclimated population, the cold acclimated one showed larger body size, higher fecundity and better lipid storage. After only five generations at 24°C the cold-acclimated population showed a significant genetic gain in prosome length compared to the warm acclimated one. References Ajiboye O.O., Yakubu A.F., Adams T.E., Olaji E.D. & Nwogu N.A. (2011) A review of the use of copepods in marine fish larviculture. Reviews in Fish Biology and Fisheries. 21, 225– 246. Alajmi F., Zeng C. & Jerry D.R. 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