The Reproductive Cycle of Ophioderma brevispinum (Echinodermata: Ophiuroidea)
The Reproductive Cycle of Ophioderma brevispinum (Echinodermata: Ophiuroidea)
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短棘皮草 (Ophioderma brevispinum) 的生殖周期（棘皮动物门：Ophiuroidea）
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
P. Tyler
中科院分区：
文献类型：
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作者：
G. Hendler;P. Tyler
.利用美国马萨诸塞州的一个种群的组织学和器官指数数据描述了短刺蛇尾的生殖周期。该周期包括一个月的仲夏产卵期，随后是冬季的配子发生和性腺的逐渐生长，以及从5月到6月的性腺生长的极大加速。在产卵季节结束时，卵原细胞在卵巢基部附近增殖，精原细胞连续层排列在精巢上。当卵母细胞生长到最大直径350 μ m时，卵黄颗粒积聚，细胞质变得不那么嗜碱性。在产卵之前，精巢变得分叉和有槽，由精子细胞柱产生的螺旋形精子聚集在内腔中。比较了不同种群的生殖周期。短刺藻及其同类物支持这样的假设，即温度可能是一个关键的外源因素，但绝对不是唯一的因素，在开始和持续的生长和产卵阶段的蛇生殖周期。
. .The reproductive cycle of the brittlestar Ophioderma brevispinum is described using histological and organ index data for a population in Massachusetts, U.S.A. The cycle consists of a one month mid-summer spawning phase followed by gametogenesis and gradual gonadal growth during the winter, and greatly accelerated gonadal growth from May to June. At the end of the spawning season, oogonia proliferate near the base of the ovary, and a continuous layer of spermatogonia lines the testis. As oocytes grow to a maximum diameter of 350 um, yolk granules accumulate and the cytoplasm becomes less basophilic. Prior to spawning, the testis becomes branched and sulcate, and a whorl of spermatozoa produced by columns of spermatids accumulates in the lumen. Comparisons between the reproductive cycles of different populations of O. brevispinum and its congeners support the hypothesis that temperature may be a critical exogenous factor, but definitely not the only factor, in the initiation and duration of the growth and spawning phases of the ophiuroid reproductive cycle.