文档介绍：Population Quantity Investigation
(Marked-Recapture Method)
Name: Ramsey (Shi Mu-xin)
Number: 20132xible in a pointed area and be investigated. While, referring the cultural individuals’ ratio relationship has influence on overall number by mathematics method.
(3) Theoretical Calculation Formula: N=M*n/m
(4) Premises and Assumptions:It will get stable figures, marked individuals can distribute among the overall individuals, re-marked operation can not impact the behavior and death of animals.
Operation Procedure
First day, we selected a pool which is nearby relational area and utilized a fish cage which is contained with some chicken bones. We made our mind to catch 20Pseudorasbora Parva(Because it has strong survival capability and it has active action)and mark it. First of all, we chose the needle filled ink to inject the fish, but we found it is tough to operate. Hence, we used a clipper to cut a small piece of fishes’ tail one by one and let them return to the pool. We still put some chicken bones in the cage and waited for a day. Experiment Place
A day later, we returned back to the pool, and we got 41(at least 40)Pseudorasbora Parva from the cage, and we observed whether the fishes’ tail is cut or not one by one cautiously. After that we let them return to the pool, because they need be alive too.
Fig.