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Improving feed efficiency in fish using selective breeding: a review ArchiMer
De Verdal, Hugues; Komen, Hans; Quillet, Edwige; Chatain, Beatrice; Allal, Francois; Benzie, John A. H.; Vandeputte, Marc.
Improving feed efficiency (FE) is key to reducing production costs in aquaculture and to achieving sustainability for the aquaculture industry. Feed costs account for 30–70% of total production costs in aquaculture; much work has been done on nutritional and husbandry approaches to improve FE but only a limited amount of research has been devoted to using genetics, despite its potential. This paper reviews past work to improve FE in fish using selective breeding and assess future directions. Direct selection on FE traits requires methods to measure individual feed consumption and estimate FE efficiently and accurately. This is particularly difficult to do in fish because of the environment in which they live. Many of the published studies on FE were found...
Tipo: Text Palavras-chave: Feed conversion ratio; Feed efficiency; Feed intake; Fish; Genetics; Selection.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00415/52675/53771.pdf
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Measuring individual feed efficiency and its correlations with performance traits in Nile tilapia, Oreochromis niloticus ArchiMer
De Verdal, Hugues; Mekkawy, Wagdy; Lind, Curtis E.; Vandeputte, Marc; Chatain, Beatrice; Benzie, John A. H..
Estimating individual feed intake of fish held in groups has long been a challenge precluding precise knowledge of the individual variation of feed efficiency (FE) in fish. In this study, counts of the number of feed pellets (1.63 mg on average) eaten by individual tilapia (Oreochromis niloticus) held in 8 mixed sex groups of 15 fish were measured from video recordings made over a period of 10 days where fish were fed twice daily to achieve compensatory growth after 10 days of fasting. The initial body weight of the fish was 9.77 ± 2.03 g. Accumulated measures of feed intake (FI) over 11 meals were found to achieve 95% repeatability and a high accuracy of estimation of FI. During the FI measurement period, the average fish growth was 12.0 ± 3.6 g, feed...
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Ano: 2017 URL: http://archimer.ifremer.fr/doc/00357/46832/46707.pdf
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Quantifying the genetic parameters of feed efficiency in juvenile Nile tilapia Oreochromis niloticus ArchiMer
De Verdal, Hugues; Vandeputte, Marc; Mekkawy, Wagdy; Chatain, Beatrice; Benzie, John A. H..
Background: Improving feed efficiency in fish is crucial at the economic, social and environmental levels with respect to developing a more sustainable aquaculture. The important contribution of genetic improvement to achieve this goal has been hampered by the lack of accurate basic information on the genetic parameters of feed efficiency in fish. We used video assessment of feed intake on individual fish reared in groups to estimate the genetic parameters of six growth traits, feed intake, feed conversion ratio (FCR) and residual feed intake in 40 pedigreed families of the GIFT strain of Nile tilapia, Oreochromis niloticus. Feed intake and growth were measured on juvenile fish (22.4g mean body weight) during 13 consecutive meals, representing 7days of...
Tipo: Text Palavras-chave: Feed conversion ratio; Tilapia; Heritability; Genetic estimations; Correlations.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00469/58115/60551.pdf
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