Estimation of survival rate for Alcippe morrisonia, Alcippe brunnea, Stachyris ruficeps, and Pomatorhinus ruficollis by using capture-recapture method

• Main Authors: Chang-Yan Yang, 楊昌諺
• Other Authors: Shao-Pin Yo
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/d8598v

碩士 === 國立中興大學 === 生命科學系所 === 102 === Survival rate is an important indicator to evaluate population trends. Population may decline due to the low survival rate. Therefore, we can take an appropriate conservation measure to increase the survival rate to maintain the normal population size among the species. The data was collected from the Monitoring of Avian Productivity and Survivorship, Taiwan (MAPS Taiwan) with the capture-recapture approach at Wushikeng, Heping District, Taichung City(Wushikeng banding station), Hushan, Douliu City, Yunlin County (Hushan banding station ) and Huben, Linnei Township, Yunlin County (Huben banding station ) from 2009 to 2013. The main purposes of this study are (1)using Cormack- Jolly-Seber (CJS) model to estimate the annul apparent survival rate and recapture rate of four adult resident bird species, including Gray-cheek Fulvettta (Alcippe morrisonia), Dusky Fulvetta (Alcippe brunnea), Rufous-capped Babbler (Stachyris ruficeps), and Taiwan Scimitar-Babbler (Pomatorhinus ruficollis). Factors such as year, sex, banding station, and whether survival rate affected by that capture only once may influence the survival rate were tested. (2) Using Kaplan-Meier method to establish the survival curves of the preceding four bird species, and to test whether the survival curve differs with different sex or banding station. Finally, we will propose a modified method for MAPS Taiwan program based upon the findings from this study. The results of CJS model indicated that annul apparent survival rates for Gray-cheek Fulvettta is 0.68 ± 0.09, for Dusky Fulvetta is 0.58 ± 0.06, for Rufous-capped Babbler is 0.36 ± 0.07 and for Taiwan Scimitar-Babbler is 0.40 ± 0.16. Annul apparent survival rate of Gray-cheek Fulvettta is higher than other three species. And annul apparent survival rate of Rufous-capped Babbler is the worst bird species among the four species. Annul apparent survival rates for Dusky Fulvetta differ among years (o: 0.53 ~ 0.71). Annul apparent survival rates for Gray-cheek Fulvettta, and Dusky Fulvetta were affected by the factor that capture only once. Different annul apparent survival rates for Gray-cheek Fulvettta、Dusky Fulvetta and Rufous-capped Babbler were found among banding stations. Annul apparent survival rates were different between the male and female populations of Gray-cheek Fulvettta. The average survival time for four bird species is less than one year from the result of K-M method. Significantly different survival curves for Gray-cheek Fulvettta were found among different banding stations. Low recapture rates and small sample sizes were found in this researcher. Therefore, in order to collage date to analyze survival rates, it can modify the method by changing the capture-recapture scheme, and rearrange the net setting by increasing the number of nets. In addition to the annul survival rates obtained from this study, further data collection for the population size as well as the reproduction of the four bird species will help us to have a better understanding about the dynamics of the populations for taking a best measure for conservation and management .