Feed and Feeding Regime Affect Growth Rate and Gonadosomatic Index of Adult Zebrafish (Danio Rerio)

Abstract

A 5-week study was conducted to evaluate commercially available Artemia, Ziegler zebrafish diet, and Calamac diet fed in five different feeding regimes on the growth and reproductive development of 7-month-old zebrafish. Zebrafish were fed to satiation three times daily during the normal work week and twice daily during the weekend and holidays. Zebrafish in dietary groups CCC (Calamac three times daily) and CCA (Calamac twice daily, Artemia once daily) had a significantly ( p < 0.05) greater weight gain and specific growth rate as compared to all other dietary groups. Male zebrafish in dietary group 5 had significantly larger gonadosomatic index (GSI) values than all other groups, while female zebrafish in dietary group CCC had significantly larger GSI values than all other groups. No differences in the fatty acid content of female gonads were detected. Zebrafish fed solely Artemia had the greatest weight loss and lowest GSI values. Preliminary evidence of protein sparing in zebrafish is reported. Collectively, this study sheds more light into the effects of the use of commercially available feeds and feeding regime on the rearing of zebrafish.

Influence of Commercial and Laboratory Diets on Growth, Body Composition, and Reproduction in the ZebrafishDanio rerio

“…A proximate analysis revealed considerable differences in crude protein, fat, fiber, and carbohydrate content among the diets tested in this study, indicating substantial variation in nutrient profiles among these feeds. Our data, along with results from previous studies, [64][65][66][67][68] clearly demonstrate that variations in dietary ingredients and corresponding nutrient composition among commercially available Negative coefficients represent a lower spawning probability or lower predicted value relative to Artemia, whereas positive coefficients represent a higher spawning probability or higher predicted value. Dependent variables: spawning success = probability of successful spawn; total egg production = predicted mean clutch size; embryo viability = mean predicted proportion of viable embryos within a clutch.…”

Effect of different feeds on the growth, survival and reproductive performance of zebrafish,Danio rerio(Hamilton, 1822)

“…The present study also gets some support from the work of Bahnasawy (), who reported that the weight gain and specific growth rate in Nile tilapia fed with 170 g kg −1 , 300 g kg −1 and 350 g kg −1 crude protein diet increased significantly with increasing dietary protein level. In contrast to present findings, Gonzales & Law () found that zebrafish fed daily with three time commercial diet and in combination with one time Artemia had a significantly ( P < 0.05) greater weight gain and specific growth rate as compared to only Artemia and with one time commercial diet.…”

Homeopathy improves production and hatching probability of zebrafish eggs

“…The ovary exerts influence on the body weight of females, due to the occupation of a large part of the celomatic cavity, demonstrated by the gonadosomatic index. The results found for the gonadosomatic index were within the values described for zebrafish by Chang et al (2013) and Gonzales & Law (2013) in their control treatments, with values close to 1% for males and 13% for females.…”