摘要
本文通过对南极乔治王岛象海豹数量的观察,初步估计了该处的种群数量;期望能为南极象海豹资源的开发和利用提供依据。
From December, 1983 to February, 1984, survey about elephant seal (Mirounga leonina) in King George Island of the Antarctic were carried out, Observations were made by the naked eye along the southern and northern coasts from the Marsh Base east and west about 7 km in length and 0.3km in width respectively. A four band counting method was formed. The appearance frequency of male and female and the stability of the animals were observed at three points of group A from December 24, 1983 to January 22, 1984. The daily changes of animal numbers were observed at two points of group B for five days. The date, time, points, numbers of the animals, sexual and weather conditions of the observations were recorded in every case. The feasible density based on all effect factors was determined, and the total amount of the elephant seal in this Island was estimated.According to the observations of all influence factcrs, the density of north bank is 114.29 animals/km2, and that of south bank is 5.24 animals/km2. The number of elephant seals in King George Island ranges from 6 646 to 7 700 animals.
出处
《海洋科学》
CAS
CSCD
北大核心
1991年第5期29-33,共5页
Marine Sciences
