• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine ecology >Sexual reproduction and early life-history traits of the Mediterranean soft coral Alcyonium acaule
【24h】

Sexual reproduction and early life-history traits of the Mediterranean soft coral Alcyonium acaule

机译：地中海软珊瑚Alcyonium acaule的有性生殖和早期生活史特征

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

Understanding processes that contribute to a better comprehension of the population dynamics of long-lived species is critical for the maintenance and potential recovery of such species. Despite the abundance of soft corals in Mediterranean rocky reefs, little information exists on their life histories and reproductive patterns. In this study, we assessed the main reproductive characteristics and early life-history traits of the long-lived soft coral Alcyonium acaule. The sex ratio was 1:1; the smallest fertile colonies were one finger in size (2.1±0.6cm in height), and both colony and polyp fertility increased with colony size. Likewise, the number of eggs and spermary sacs per polyp increased significantly with colony size, whereas the diameter of the female and male sexual products did not. Over 6years of observations (2007–2012), spawning occurred primarily in July, after the seawater reached 20°C, in a single spawning episode per year. Approximately 80% of female colonies released eggs, which were retained on the surface of the mother colony by mucous strings for up to a few days. High fertilization rates were observed during spawning in 2008 and 2009 (94.9% and 87.0%, respectively). The timing of development was ~24h for the blastulae, ~48–72h for the planulae and 8–22days for metamorphosis into primary polyps. Survivorship of planulae was relatively high (~50% at 45days after release), but only 24% of larvae metamorphosed into primary polyps, and their survivorship was moderate after 2months (65% in 2008 and 74% in 2009). Asexual reproduction was negligible, indicating that sexual reproduction is the main mechanism supporting the maintenance and recovery of populations.
机译：了解有助于更好地理解长寿物种种群动态的过程对于此类物种的维护和潜在恢复至关重要。尽管地中海礁石中有丰富的软珊瑚，但关于它们的生活史和生殖方式的信息很少。在这项研究中，我们评估了长寿命的软珊瑚Alcyonium acaule的主要繁殖特征和早期生活史特征。性别比为1：1；最小的可育菌落只有一个手指大小（高2.1±0.6cm），菌落和息肉的繁殖力均随菌落的大小而增加。同样，每个息肉的卵和精囊的数量随着菌落的大小而显着增加，而雌性和雄性性器官的直径却没有。超过6年的观察结果（2007-2012），产卵主要发生在海水达到20°C之后的7月，每年发生一次。大约80％的女性菌落释放出卵，这些卵被粘液串保留在母菌落的表面上长达几天。在2008年和2009年产卵期间观察到高施肥率（分别为94.9％和87.0％）。囊胚的发育时间为〜24h，扁平细胞的发育时间为〜48-72h，变态为原发性息肉的发育时间为8-22天。浮游动物的存活率相对较高（释放后45天时约为50％），但只有24％的幼虫变态为原发性息肉，两个月后它们的存活率中等（2008年为65％，2009年为74％）。无性生殖可忽略不计，这表明有性生殖是支持维持和恢复人口的主要机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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