Cycle of gonadal development in Eunicella singularis (Cnidaria: Octocorallia): trends in sexual reproduction in gorgonians
Cycle of gonadal development in Eunicella singularis (Cnidaria: Octocorallia): trends in sexual reproduction in gorgonians
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刺胞动物 (Cnidaria: Octocorallia) 的性腺发育周期：柳珊瑚有性生殖的趋势
DOI：
10.1111/j.1744-7410.2007.00101.x
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发表时间：
2007
影响因子：
1.2
通讯作者：
M. Micheli
中科院分区：
文献类型：
--
作者：
M. Ribes;R. Coma;S. Rossi;M. Micheli
。 Eunicella singleis 是一种柳珊瑚物种，其成员在地中海硬底近岸群落中数量丰富。为了更好地了解该物种从最近的大规模死亡事件中恢复的能力，对该物种的生殖生物学进行了检查。 Eunicella singleis 是一种稳定、雌雄同体、迭代繁殖的物种，每年繁殖并表现出配子发生的季节性模式，其特征是配子每年一次成熟。性别比例与1：1相比没有显着差异。卵子发生持续 13-17 个月，从 2 月到 6 月开始，到次年 5 月下旬到 7 月期间每个息肉释放 0.7 个浮浪幼虫结束。成熟卵母细胞的直径范围为 450–860 μm。精子发生比卵子发生短得多，发生时间超过 5-6 个月。春季，两性的性腺产量都会增加，并在五月下旬至六月期间雄性群体产卵时达到顶峰。卵母细胞的受精和浮浪幼虫的发育发生在雌性群体的息肉内。六月和七月观察到浮浪藻释放。这项研究和之前关于地中海柳珊瑚有性生殖的研究得出的模式表明，对性腺发育的投资似乎与资源的可用性有关。
. Eunicella singularis is a gorgonian species whose members are abundant in hard-bottom sublittoral communities of the Mediterranean Sea. The reproductive biology in this species has been examined to better understand the ability in this species to recover from recent mass mortality events. Eunicella singularis is a stable, gonochoric, iteroparous species that reproduces annually and exhibits a seasonal pattern of gametogenesis characterized by a single annual maturation of the gametes. The sex ratio did not significantly differ from 1:1. Oogenesis lasted 13–17 months, beginning between February and June, and ending with the release of 0.7 planula larvae per polyp between late May and July of the following year. The diameter of mature oocytes ranged 450–860 μm. Spermatogenesis was much shorter than oogenesis and occurred over 5–6 months. Gonadal production of both sexes increased in spring and culminated with the spawning of male colonies in late May–June. Fertilization of oocytes and development of the planula larvae occurred within the polyps of female colonies. Planula release was observed in June and July. The patterns emerging from this and previous studies on sexual reproduction of Mediterranean gorgonians suggest that investment in gonad development appears to be related to resource availability.