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Compensatory growth response of E uropean sea bass ( D icentrarchus labrax L.) under cycled starvation and restricted feeding rate
Author(s) -
Türkmen Serhat,
Eroldoğan Orhan Tufan,
Yılmaz Hatice Asuman,
Ölçülü Abdüllatif,
Inan Gül Ayten Kiriş,
Erçen Zeynep,
Tekelioğlu Nazmi
Publication year - 2012
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/j.1365-2109.2011.02970.x
Subject(s) - dicentrarchus , biology , sea bass , zoology , compensatory growth (organ) , starvation , dry matter , bass (fish) , fishery , fish <actinopterygii> , endocrinology , kidney
The compensatory growth response of the E uropean sea bass ( D icentrarchus labrax ) that faced cycling starvation and restricted ration was assessed. Juveniles (10.5 g) were stocked into 15 tanks at a density of 25 fish per tank. Five different feeding regimes were tested on triplicate groups of fish: C Satiation : control fed for 60 days without deprivation, C Restricted : 25% restricted feeding, S‐R: 1 day starvation then 4 days C Restricted feeding, R‐F: 1 day C Restricted feeding then 4 days C Satiation feeding, and, finally, S‐F: 1 day starvation then 4 days C Satiation feeding. The specific growth rate of fish in the C Satiation (2.5 ± 0.06% day −1 ), S‐F (2.5 ± 0.11% day −1 ) and R‐F (2.4 ± 0.18% day −1 ) were significantly higher than that of C Restricted (2.2 ± 0.05% day −1 ) or S‐R (2.0 ± 0.01% day −1 ). Fish in S‐F group were able to achieve catching up with the C Satiation . There was no significant difference in feed conversion rates but R‐F and S‐F consumed approximately 34% more feed than C Satiation following the first re‐feeding day. Although, the highest lipid content was observed in C Satiation (14.4%), S‐R (33.3% dry matter) had the highest water content compared with the C Satiation and C Restricted (37.8% and 36.9% dry matter respectively). In conclusion, it may be concluded that sea bass has rapid response to cycling starvation/re‐feeding and that a 25% restricted feeding ratio is insufficient to invoke a compensatory growth response in sea bass.