ARTICLE
TITLE

An analytical study on behavioral responses of different fishes, related to excretory ammonia concentration

SUMMARY

The present experiment was conducted to analyze the compatibility in tolerance of ammonia secretion in various fishes; C. gariepinus, C. batrachus, H. fossilis, C. punctatus and C. carpio using 160-liter capacity culture tank. Two different systems; mono culture and poly culture were arranged to compare their behavioral activities including opercular movement (OM), S-shaped movement (SM), surfacing activity (SA), jumping activity (JA), bottom dwelling activity (BDA), schooling behavior (SB), erraching behavior (EB), equilibrium status (Eq B) and growth performance of fishes for 158 days. Certain daily changes were observed during the experiment and after 136 days (concentration of ammonia, 1.6mg/L) all species C. carpio, C. punctatus, C. batrachus, H. fossilis died subsequently. After 158 days post exposure of 1.97mg/L ammonia to the fishes, all the studied fish were found dead in poly culture experimentation system except Clarias garipenus. The study also indicates that the behavioral responses of the selected species are directly related to the excretory ammonia concentration.

PAGES
pp. 24 - 37

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