Question

96. In a river in British Columbia, 430 sockeye salmon were captured and marked on the fin with n uniquely numbered T-bar anchor tag. Two weeks later, a total of 154 sockeye salmon were Tecaptured and 1g bore the tags on their fin. Estimate the sockeye salmon population in this river during this study. IA /4

Answer 1

430 sockeye salmon were captured and marked with tag

2 weeks later 154 sockeye salmon were newly recaptured in which already 18 had tags on them .

So 154-18=136 sockeye salmon is newly captured without tags .

Total population during this study is 430(tagged) + 136 (newly captured without tags) = 566 .

Answer is 566 sockeye salmon in the river .