Population size estimation of penthetor lucasi in wind cave, Bau, Sarawak

Barapoi, Inu Puun. (2004) Population size estimation of penthetor lucasi in wind cave, Bau, Sarawak. [Project Report] (Unpublished)

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Abstract

Accurate estimation of population size is essential for understanding the dynamics and structure of natural populations, as well as for assessing conservation status. A study was done in Wind Cave, Bau from October 14th to October 22nd, 2003, to estimate the population size of Penthetor lucasi. Throughout this study, 765 individuals of P. llica i were captured and from these, a total of 27 individuals were recaptured. Due to the nature of sampling methods, it was initially assumed that the population of P. lucasi in Wind Cave, Bau is a closed population. Three closed mark-recapture model estimators were applied in this study, namely the Lincoln-Petersen, the Schnabel, and the Schumacher-Eschmeyer method. The population size of P. lucasi analysed using the Lincoln-Petersen method were rather unrealistic and not convincing as compared to the estimations calculated using the Schnabel, and the Schumacher-Eschmeyer estimators. Determination of the appropriate sample size led to a Coefficient of Variation of ±0.2; only 40 % data were achieved. Further, testing for any violations against a closed population assumptions were also performed. Unfortunately, the closed population assumptions were clearly violated, leading to all closed population estimations as being invalid. The Tanaka model was subsequently computed: an estimated population size of28338 individuals was achieved. In addition, if a 100% data were to be achieved, the popUlation estimation should be 70845 individuals. This estimate will form the basis of our population estimation for P. lucasi in Bau Cave, Sarawak.

Item Type: Project Report
Additional Information: Project report (B.Sc.) -- Universiti Malaysia Sarawak, 2004.
Uncontrolled Keywords: Penthetor lucasi, popUlation size, violations against closed population model estimators, and Tanaka model, bat,unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, undergraduate, research, Universiti Malaysia Sarawak
Subjects: Q Science > QE Geology
Q Science > QH Natural history
Q Science > QL Zoology
Divisions: Academic Faculties, Institutes and Centres > Faculty of Resource Science and Technology
Depositing User: Saman
Date Deposited: 13 Sep 2017 06:59
Last Modified: 13 Sep 2017 07:00
URI: http://ir.unimas.my/id/eprint/17580

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