Effects of Different Algae Sources on Body Color of Copadichromis trimaculatus and Its Partial Immunity Index

doi:10.14088/j.cnki.issn0439-8114.2019.02.022

Abstract

Abstract: ： A feeding trial was conducted to evaluate the effects of different algal sources on skin color and partial immune index of cichlids. Four experimental diets were formulated to add Dunaliella salina,Schizochytrium Limacinum and Chlorella vulgaris with 1% algal,and the basal diet（without algal）.Each diet was randomly assigned to triplicate groups with 15 Copadichromis trimaculatus （approximately 9.39±0.55 g） which were cultivated for 45 days. The results showed that the concentration of carotenoid in the skin and fin of fish was significantly higher in the diet of adding Dunaliella salina than others（P<0.05）. The diet of adding Schizochytrium Limacinum could significantly increase the a*（P<0.05）. Moreover,the diet of adding 1% Dunaliella salina could significantly increase the activity of acid phosphatase（AKP）,alkaline phosphatase （ACP）,and alanine aminotransferase（GPT） in the liver of cichlids（P<0.05）,and the activity of GPT and aspartate aminotransferase（GOT） has no significant difference in the serum of all tested fishes. In conclusion,the diet of adding Dunaliella salina and Schizochytrium Limacinum was effective in modifying the body color of Copadichromis trimaculatus and the former could improve the immune function of the liver.

Key words: Copadichromis trimaculatus, body coloring, immunity index

CLC Number:

SUN Jin-hui, LI Jia-xin, CUI Pei, YANG Yan-jing, WEI Dong, BAI Dong-qing. Effects of Different Algae Sources on Body Color of Copadichromis trimaculatus and Its Partial Immunity Index[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(2): 100-103.

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