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- Title
Reduction of early sexual maturation in male S0 Atlantic salmon ( Salmo salar L.) by dietary supplementation of tetradecylthioacetic acid ( TTA).
- Authors
Arge, Regin; Thomassen, Magny S; Berge, Rolf K; Zambonino‐Infante, Jose L; Terjesen, Bendik Fyhn; Oehme, Maike; Rørvik, Kjell‐Arne
- Abstract
Effects of dietary tetradecylthioacetic fatty acid ( TTA) on muscle fat, development of gonads and early sexual maturation in S0 Atlantic salmon during the first year in sea were investigated. TTA (0.5% w/w) was added to the feeds for 8 weeks in the spring. In May, at the end of the TTA-feeding period, the fish in the TTA group had significantly ( P < 0.05) less fat (10.1%) stored in muscle compared with the control group (10.8%). In September, mean male gonadosomatic index ( GSI) in maturing fish in the TTA group was found to be lower compared with the maturing fish in the control group ( P = 0.05). On the basis of GSI values, male sexual maturation in September was 10.0% vs. 14.4% for the TTA and the control group respectively. Thus, relative to the control group, the incidence of male sexual maturation in the TTA group was reduced by about 1/3 ( P = 0.002). Production data was not affected by dietary supplementation of TTA. This study reveals that TTA significantly reduces the incidence of male sexual maturation in S0 Atlantic salmon. A significant elimination model of TTA in fish muscle that takes into account, the growth rate of the fish was further developed in this study.
- Subjects
SEXUAL maturity in fishes; ATLANTIC salmon; ACETIC acid; DIETARY supplements; GONADS; MARINE ecology
- Publication
Aquaculture Research, 2014, Vol 45, Issue 5, p922
- ISSN
1355-557X
- Publication type
Article
- DOI
10.1111/are.12036