PAKISTAN JOURNAL OF ZOOLOGY, cilt.46, ss.669-676, 2014
The purpose of this study is to compare the growth of goldfish, Carassius auratus auratus L. larvae fed on Artemia nauplii and, decapsuated cyst from 4 days after hatching (DAR) to 40 DAR In detail, specific growth and survival rates, specific activities of tote protease, lipase,. amylase, and chitinase were examined in both experimental groups. At. the end of the study, the highest survival rate was found in the group fed on cyst with 75.60+/-10.72% while the rate of the group fed on Artemia nauplii was found as 72.20+/-13.88%. Specific growth rate was calculated for larvae were-fed by Artemia nauplii and cyst as 11.59+/-8.92%d(-1) and 12.02+/-4.94%.d(-1), respectively. Total protease. activity presented: increased: profile during, the early ontogeny in both experimental group. The highest total protease specific activity was determined on day 34 as 3.81+/-0.26 U/mg protein(-1). in nauplii group. The maximum value for total protease (3.81+/-0.26 U.mg(-1) protein)' and lipase (557.38+/-24.77 mU/mg) specific activities were determined on day 34 in nauplii group (p>0.05). The peak of amylase (2.77+/-0.25 U.mg(-1) protein) and chitinase (769.27+/-74.74 mU.mg(-1) protein) specific activitdes were determined on day 34 in cyst group (p<0.05). Results of the study indicated that feeding, on decapsulated cyst contributed positively, to the larval development goldfish as much as Anemia: nauplii.