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首页> 外文期刊>Marine biology >Reproductive ecology of Fungiacyathus marenzelleri from 4100 m depth in the northeast Pacific Ocean
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Reproductive ecology of Fungiacyathus marenzelleri from 4100 m depth in the northeast Pacific Ocean

机译：东北太平洋4100 m深度真菌类真菌的生殖生态学

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摘要

Fungiacyathus marenzelleri (Vaughan, 1906) is a deep-water solitary coral, cosmopolitan in distribution that is found at depths of 300-6,328 m. This study examined gametogenesis, inter-annual variability and reproductive periodicity of F. marenzelleri collected from Station M (34°50′N, 123°00′W) in the northeast Pacific at a depth of 4,100 m. Samples were collected (May, June, October 1996; August 1998; February, June 2001; and June 2002) and histologically processed with spermatogenic stage, oocyte size and fecundity measured. Four stages of spermatogenesis were identified and all males contained multiple stages of sperm development in each seasonal sample. Three stages of oocyte development were identified; previtell-ogenic (< 28-150 μm), vitellogenic (150-300 μm) and late vitellogenic (300-400 μm). Comparison of mean oocyte diameters among sampling dates showed there were no inter-annual variations or seasonal differences. Overall, fecundity was 1,290 (±407) oocytes polyp~(-1), and with no significant differences between sample months. Fecundity was not polyp-size dependent. This study shows a similar quasi-continuous mode of reproduction to this species examined from the Northeast Atlantic Ocean, but the fecundity is reduced by 50%. The reproductive output may fluctuate in relation to the input of organic material at this site, as shown by non-significant trends in the oocyte size-frequency and fecundity data. A quasi-continuous output of gametes would promote successful fertilisation and wide dispersal of the lecithotrophic larvae.
机译：Fungiacyathus marenzelleri（Vaughan，1906）是一种深水孤立珊瑚，分布广泛，分布在300-6,328 m的深处。这项研究检查了东北太平洋M站（34°50'N，123°00'W）在4,100 m深度采集的马氏梭菌的配子发生，年际变化和生殖周期。收集样品（1996年5月，6月，10月； 1998年8月； 2001年6月和2002年6月），并在组织学上处理生精期，卵母细胞大小和繁殖力。确定了四个阶段的精子发生，每个季节的样本中所有男性都包含多个阶段的精子发育。确定了卵母细胞发育的三个阶段。卵黄体形成前（<28-150μm），卵黄形成（150-300μm）和晚期卵黄形成（300-400μm）。采样日期之间平均卵母细胞直径的比较显示没有年际变化或季节差异。总体而言，卵母细胞的繁殖力为1,290（±407）个卵母细胞息肉（-1），并且在两个月的样本之间没有显着差异。生殖力与息肉大小无关。这项研究表明，与从东北大西洋考察的该物种相似的准连续繁殖方式，但繁殖力降低了50％。生殖输出可能会相对于该部位的有机物质输入而波动，如卵母细胞大小频率和繁殖力数据的非显着趋势所示。配子的准连续输出将促进营养化幼虫的成功受精和广泛传播。

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