阿拉斯加鳐（Bathyraja parmifera）的生殖生物学，兼论一个雌雄同体个体

Reproductive biology of the Alaska skate Bathyraja parmifera, with comments on an intersexual individual.

作者信息

Matta M E

机构信息

Resource Ecology and Fisheries Management Division, Alaska Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 7600 Sand Point Way NE, Seattle, WA 98115, U.S.A.

出版信息

J Fish Biol. 2015 Sep;87(3):664-78. doi: 10.1111/jfb.12747. Epub 2015 Jul 29.

DOI:10.1111/jfb.12747

PMID:26219734

Abstract

A total of 1357 specimens of Alaska skate Bathyraja parmifera were collected in the eastern Bering Sea by fisheries observers and during scientific groundfish surveys from 2003 to 2005. Male and female gonads were examined for maturity stage and seasonal reproductive timing. Based on seasonal reproductive data, including the occurrence of egg cases, ovum size, ovum number, shell-gland width and gonado-somatic index, this species appears to reproduce continually throughout the year. Potential effects of maternal size upon the size and number of mature oocytes were also investigated, with total length having a significant, although weak, influence on both. Morphology of a single intersexual individual encountered during the collection period is also described.

摘要

2003年至2005年期间，渔业观察员和在底栖鱼类科学调查中，在白令海东部共采集了1357份阿拉斯加鳐（Bathyraja parmifera）样本。对雄性和雌性性腺进行了成熟阶段和季节性繁殖时间的检查。根据包括卵鞘出现情况、卵大小、卵数量、壳腺宽度和性腺体指数在内的季节性繁殖数据，该物种似乎全年都在持续繁殖。还研究了母体大小对成熟卵母细胞大小和数量的潜在影响，全长对两者都有显著影响，尽管这种影响较弱。文中还描述了在采集期间遇到的一个雌雄同体个体的形态。