REPRODUCTIVE-BIOLOGY OF THE SLENDER SMOOTHHOUND, GOLLUM-ATTENUATUS, COLLECTED FROM NEW-ZEALAND WATERS

被引：21
|
作者：
YANO, K
机构：
[1] Seikai National Fisheries Research Institute, Shimonoseki Branch, Fisheries Agency of Japan, Shimonoseki, 750
来源：
ENVIRONMENTAL BIOLOGY OF FISHES | 1993年 / 38卷 / 1-3期
关键词：
ELASMOBRANCH; PROSCYLLIIDAE; SIZE AT MATURITY; SEX RATIO; LITTER SIZE; EMBRYO;
D O I：
10.1007/BF00842904
中图分类号：
Q14 [生态学（生物生态学）];
学科分类号：
071012 ; 0713 ;
摘要：
The reproductive biology of 385 male and 373 female slender smoothhounds, Gollum attenuatus, collected from New Zealand waters was examined. Size at maturity for both sexes was about 700 mm TL. Litter size was usually two. The sex ratio of embryos was 1:1. The right ovary ovulated 50-100 ova, 4-8 mm in diameter, and 30-80 ova were enclosed in each egg capsule. Only one embryo developed from the many ova in each egg capsule, the other undeveloped ova were ingested and passed to an external yolk sac which formed the yolk supply for the developing embryo.
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页码：59 / 71
页数：13
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