...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ICES Journal of Marine Science >Reproductive biology of Atlantoraja cyclophora (Regan 1903) (Elasmobranchii: Rajidae) off southern Brazil
【24h】

Reproductive biology of Atlantoraja cyclophora (Regan 1903) (Elasmobranchii: Rajidae) off southern Brazil

机译：巴西南部海域Atlantoraja cyclophora（Regan 1903）（Elasmobranchii：Rajidae）的生殖生物学

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A total of 459 (245 females, 214 males) Atlantoraja cyclophora was captured by bottom trawl off the coast of Rio Grande do Sul between 30°40′S and 34°30′S during surveys conducted in winter 2001 and summer/autumn 2002 at depths of 100—300 m. Total length at maturity was 52.8 cm for females and 48.5 cm for males. Symmetry and functional parity of the gonads were observed in both sexes, but there was no significant temporal variation in either sex for any of the reproductive parameters studied. Ovulation and egg-deposition were similarly intensive in both seasons. In adult females, there was an ovarian resting period at an individual level, though it was not synchronized at a population level. Distribution of egg-bearing females was not related to depth or species' range.
机译：在2001年冬季和2002年夏季/秋季在南里奥格兰德州沿海30°40'至34°30'之间进行的海底拖网捕获了总共459条（245位女性，214位男性）深度为100-300 m。雌虫成熟时的总长度为52.8厘米，雄虫则为48.5厘米。在两性中均观察到性腺的对称性和功能均等，但是对于所研究的任何生殖参数，两性均无明显的时间变化。在两个季节中，排卵和卵沉积的强度相似。在成年雌性中，尽管在人群水平上不同步，但在个体水平上有一个卵巢静止期。产卵雌性的分布与深度或物种范围无关。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号