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The Effect of Different Feeding Protocols on Compensatory Growth of Black Sea Trout Salmo trutta labrax
Author(s) -
Kocabaş Mehmet,
Başçınar Nadir,
Kayım Murathan,
Er Halil,
Şahin Halit
Publication year - 2013
Publication title -
north american journal of aquaculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.432
H-Index - 41
eISSN - 1548-8454
pISSN - 1522-2055
DOI - 10.1080/15222055.2013.799621
Subject(s) - biology , salmo , zoology , compensatory growth (organ) , feed conversion ratio , fishery , acclimatization , trout , growth rate , body weight , fish <actinopterygii> , endocrinology , ecology , geometry , mathematics , kidney
The objective of this study was to determine the effects of different feeding protocols on compensatory growth, feeding rate, and feed conversion efficiency of Black Sea Trout Salmo trutta labrax . To our knowledge, no previous feeding experiments with Black Sea Trout have incorporated a fasting period to simulate the handling and acclimation conditions experienced by farmed fish. Fifteen fish per tank (10.69 ± 0.06 cm and 13.22 ± 0.14 g, mean ± SE) were stocked into 40‐L fiberglass tanks. Fish were fed with different fasting–feeding regimes for 95 d and were equally allotted to four treatments (T cont : control; T 5–10 : 5 d fasting, 10 days feeding; T 10–10 : 10 d fasting, 10 d feeding; and T 15–10 : 15 d fasting, 10 d feeding) with three replicates per treatment. The results indicated that length ( P = 0.0005), weight ( P = 0.000), condition factor ( P = 0.013), and specific growth rate ( P = 0.014) were significantly affected by the interaction between feeding and time. All fasting treatments showed partial compensation during refeeding. There was an increase in daily feeding rate and feed conversion efficiency in fasting treatments compared with the control treatment. In contrast, at the end of the experiment specific growth rate, condition factor, and body weight in fasting treatments were significantly lower compared with the control treatment. We concluded that there was partial compensation of growth with regular refeeding after periods of feed deprivation (e.g., 5, 10, or 15 d) over a long term and a shorter fasting period may be preferred in order to achieve compensatory growth.