...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Population biology of the fiddler crab Uca annulipes (Brachyura: Ocypodidae) in a tropical East African mangrove (Mozambique)
【24h】

Population biology of the fiddler crab Uca annulipes (Brachyura: Ocypodidae) in a tropical East African mangrove (Mozambique)

机译：东非热带红树林（莫桑比克）招潮蟹Uca annulipes（Brachyura：Ocypodidae）的种群生物学

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

The community structure of the tropical fiddler crab Uca annulipes (H. Milne Edwards) has been studied in Mozambique for the first time. Ten 0.25 m~2 squares were randomly sampled on a monthly basis during low tide periods from January to December 2002 at Costa do Sol Mangrove, Maputo Bay, southern Mozambique. A total of 981 crabs were captured, of which 494 were males (50.36%), 231 non-ovigerous females (23.85%) and 253 ovigerous females (25.79%). The overall size frequency distribution was unimodal, with males being larger than both ovigerous and non-ovigerous females. Females were more abundant in the smallest size classes while males outnumbered females in the largest ones. The overall sex ratio (1:0.99) did not differ from the expected 1:1 proportion, but significant deviations were observed in January, April, August and November. Results indicate that the size frequency distributions of this species can also be determined through direct analysis of burrow openings. Breeding took place year-round with two peaks of spawning in summer (January and December). Recruits were present throughout the year, with high abundance in summer probably due to the high reproductive activity observed in this season. The present results may allow us to suggest that U. annulipes follows a rapid breeding cycle accompanied by a rapid larval development and settlement in the study area.
机译：热带提琴蟹Uca annulipes（H. Milne Edwards）的群落结构首次在莫桑比克得到了研究。 2002年1月至2002年12月的低潮期，每月在莫桑比克南部马普托湾的太阳海岸红树林中随机抽取10个0.25 m〜2平方。总共捕获了981只螃蟹，其中雄性494只（50.36％），雌性非雌性231只（23.85％）和雌卵253只（25.79％）。总体大小频率分布是单峰的，雄性比雌雄和雌雄都大。在最小尺寸的班级中，女性更为丰富，而在最大尺寸的班级中男性超过女性。总体性别比（1：0.99）与预期的1：1比例没有差异，但在1月，4月，8月和11月观察到明显的偏差。结果表明，该物种的大小频率分布也可以通过对洞穴开口的直接分析来确定。繁殖全年进行，夏季（1月和12月）有两个产卵高峰期。全年都有新兵入伍，夏季盛产，这可能是由于本季节观察到的高繁殖力所致。目前的结果可能使我们建议，环孢菌的繁殖周期很快，伴随着幼虫在研究区域的快速发育和沉降。

著录项

相似文献

  • 外文文献
  • 中文文献
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