| Summary: | 碩士 === 東海大學 === 環境科學系 === 93 === Field investigation and radio-telemetry was conducted to study the activity pattern, including nest-care time budgets and home range, of breeding Kentish Plover at the Tatu Estuary in Central West Taiwan. Data of nest-care time budgets by 18 pairs of parents were collected and analyzed from April, 2003 to August, 2004 were collected and analyzed. The results demonstrate that females mainly incubate during 09:00~13:00, where as males do so during 06:00~09:00 and 13:00~18:00. There is no significant correlation between wind velocity and the proportion of parent nest-care time budgets (P＞0.05), while significant correlation was found between sand temperature and the proportion of parent nest-care time budgets (P＜0.01). The results from 24hr tracking of 5 radio-tagged birds by minimum convex polygon method show that the home range of male is 123.5±31.3 hectares (n=3), and that of female is 189.3±7.9 hectares (n=2). The primary area of activity for both male and female is within 5 hectares. The results also reveal that the home range in daytime is larger than that in nighttime. According to the habitat investigation of its home range, there appears that to be a high utilization rate of breeding individuals in the inland fresh-water area, which is an important feeding habitat. Therefore, to recuperate the breeding habitat of Kentish Plover, establishment of suitable water environment in the core area of the parenting home range should be a priority to satisfy the demand for breeding and to increase the breeding success and nest density.
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