黄海中华哲水蚤C5发育期油脂积累初步研究

摘要

We studied the regional and seasonal changes of the oil storage in the C5 stage of Calanus sinicus in Yellow Sea based on the data collected from 9 cruises.The oil sac of C5s in the nearshore areas was found small all year long.However,C5s from the continental shelf areas were found with great variation in the oil sac volume（OSV）.As the dominant stage in the over-summering population,C5 showed maximum OSV between May-June when the population prepared to oversummer.The oil sac volume gradually decreases,and both the nearshore and shelf population showed no significant difference in the OSV by December.The decrease of the oil storage was probably caused by the metabolic consumption.After comparison to the data on Calanus finmarchicus in North Atlantic,we concluded that the oil storage of Calanus sinicus might be the main energy resource during dominant stage.These finding might have significance in understanding its life history in the Yellow Sea.%根据9个黄海调查航次的数据,研究了黄海中华哲水蚤C5发育期油脂积累的区域、季节变化,并探讨了中华哲水蚤油脂积累对其生理、生活史的可能作用。在黄海近岸海域,中华哲水蚤C5期油囊体积常年较小;而在陆架海域则表现出明显的季节差异。在陆架区,C5期的油囊体积与度夏过程联系密切：最大油囊体积（可占前体部体积的30%以上）出现于度夏准备期（5、6月）,随着度夏过程的进行,油囊体积因代谢而不断消耗,至12月时,油囊体积降低到与近岸种群无异;次年4月以后,油脂积累可以随着食物条件好转而再次开始积累。通过对比北大西洋的飞马