Turkish Journal of Fisheries and Aquatic Sciences
2010, Vol 10, Num, 1 (Pages: 27-31)
Optimum Dietary Protein Level for Blue Streak Hap, Labidochromis caeruleus
Sebahattin Ergün 1 ,Derya Güroy 1 ,Haluk Tekeşoğlu 1 ,Betül Güroy 1 ,İhsan Çelik 1 ,A. Adem Tekinay 1 ,Musa Bulut 1
1 Canakkale Onsekiz Mart University, Faculty of Fisheries, Department of Aquaculture, Çanakkale 17100, Turkey
DOI :
10.4194/trjfas.2010.0104
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An experiment was designed to determine the optimum dietary protein level of a freshwater ornamental fish, Blue streak
hap (Labidochromis caeruleus). Four isocaloric fish meal based diets ranging from 30% to 45% in protein were fed to
triplicate groups of Blue streak hap for 8 weeks. Fish (initial weight, 0.85 g) were reared in twelve 50 L aquarium with
biological filter and controlled temperature (27.5°C), in stocking density of ten fish/aquarium. Results showed that dietary
protein level significantly influenced final weight, weight gain and specific growth rate of fish. Maximum growth of fish was
observed in the 40% protein diet, although this was not significantly different from the 35% and 45% protein diets (P>0.05).
Specific growth rate and feed efficiency increased from 30% to 40% protein, and thereafter decreased for diet 45% protein.
There were statistically significantly differences in feed intake among treatments (P<0.05). Fish fed with the highest protein
diet had lower percentage daily feed consumption values than those of fish fed with the lowest protein diet. Under the
experimental conditions applied, juvenile blue streak hap, L. Caeruleus, appear to require more than 35% dietary protein for
optimized growth.
Keywords :
blue streak hap, Labidochromis caeruleus, protein requirements, ornamental fish nutrition, growth