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首页> 外文期刊>Journal of oceanography >Seasonal Variations in Abundance and Size Composition of the Lobate Ctenophore Bolinopsis Mikado (Moser) in Tokyo Bay, Central Japan
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Seasonal Variations in Abundance and Size Composition of the Lobate Ctenophore Bolinopsis Mikado (Moser) in Tokyo Bay, Central Japan

机译：日本中部东京湾叶形C虫Molindo（Moser）的丰度和大小组成的季节性变化

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摘要

Surveys of the abundance and size composition of the ctenophore Bolinopsis mikado were conducted in Tokyo Bay over a 5-year period from 1990 to 1994. B. mikado appeared throughout the year, and its mass occurrence was observed between August and November; annual maximum abundance ranged from 19 to 91 ind. m?2. Water temperature seems to influence the seasonal variation of B. mikado abundance. Environmental conditions (e.g. rough waters due to a typhoon) and predation by the beroid ctenophore Beroe cucumis appear to affect annual variations of B. mikado abundance. Size frequency distributions of B. mikado indicated that its reproduction was most active in summer and fall but occurred throughout the year in Tokyo Bay. A sharp decline of the copepod population in August 1990 was probably due to predation by B. mikado which was very abundant at that time; its predatory impact was estimated to be 24 % day?1.
机译：1990年至1994年的5年中，在东京湾进行了对ten虫Bolinopsis mikado的丰度和大小组成的调查。mikado全年出现，并在8月至11月期间大量发生。年度最大丰度范围为19到91 ind。 m？2。水温似乎影响米卡多氏菌的丰度季节变化。环境条件（例如，由于台风造成的汹涌水域）和环状锥虫Beroe cucumis的掠食似乎会影响mikado丰度的年度变化。 B. mikado的大小频率分布表明，其繁殖在夏季和秋季最活跃，但全年在东京湾发生。 pe足类种群在1990年8月急剧减少，可能是由于当时的米卡多（B. mikado）捕食。其掠食性影响估计为每天24％？1。

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