摘要
自1955年开始,作者对黄海北部捕获的小鳁鲸(Balaenoptera acutorostrata)的生物学特性做了一些调查,通过对陆地鲸体解剖所得胎儿的测定,以及在黄海中部的探捕,结合长期的海上实际观察,对黄海小鳁鲸的生殖习性进行了分析研究,现将结果报道如下。
Minke whales caught in the Huanghai Sea range from 4.16 m to 8.60 m in length,the average length being 6.93m for the female and 6.14m for the male.Sex ratio of the female is 74.3%.The pregnancy ratio of all sexually matured females is 65.8%.The minimum size of the pregnant whale observed is 6.60 m in length.Females,the body lengths of which are more than 7 m long,are all sexually matured.According to the studies on the embryos obtained from the females caught in the northern Huanghai Sea,there is only one breeding season each year.Mating mostly occurs in July through September,and the length of pregnancy is ten to eleven months with the peak of calving in May through July.Most females breed one calf each time,but there are two cases with twins.Sex ratio of female fetus is 56.6%,and the newly born calf measures 250-270 cm in body length.
作者
王丕烈
Wang Peilie(Institute of Marine Fisheries,Liaoning Province)
出处
《海洋与湖沼》
1982年第4期338-345,共8页
Oceanologia Et Limnologia Sinica
