Studies on the Zooplankton in Omura Bay— I Seasonal Occurrences of Copepods
Studies on the Zooplankton in Omura Bay— I Seasonal Occurrences of Copepods
复制标题
大村湾浮游动物研究——Ⅰ桡足类的季节发生
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
S. Iizuka
中科院分区：
文献类型：
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作者：
H. Itoh;S. Iizuka
本研究旨在探讨大村湾浮游动物的季节分布及其与水文条件的关系。本文描述了桡足类的季节发生。1976年1月、3月、5月、7月、9月和11月，在海湾的26个站点采集了样本。在所采集的浮游动物中，除了在5月份底栖幼虫最多的时候外，其余的都是以桡足类为主。共鉴定出桡足类15属24种。在所采集的桡足类中，粗毛拟甲藻、黄毛阿卡梯、短角拟甲藻和褐微体微体动物为优势种，微小拟细足亚种、腹侧中心腹足类、海洋拟白纹藻、太平洋真足亚种和红腹小亚种为优势种。只有在秋季才发现少数海洋物种。按季节划分，优势和次优势桡足类的出现频率分别为：小盾副甲冬-春季；粗略副甲属夏季；腹侧中心亚种：冬季-春季；海洋伪足亚种，冬季-春季；太平洋真足目，春季；赤足亚科，秋季；克劳斯亚纲；短角亚目，夏季-秋季；褐微体金龟，常年。除褐家鼠外，大多数桡足类的季节变化与水文条件的变化相对应，全年分为两个时期。
This study was carried out to elucidate the seasonal occurrences of zooplankton and their relation with the hydrographic conditions in Omura Bay. This paper describes the seasonal occurrences of copepods. Samples were collected at 26 stations in the bay in January, March, May, July, September, and November of 1976. Copepods were the most predominant group among the zooplankton collected except in May when the benthos larvae were the most abundant. 24 species in 15 genera of copepods were identified. Among the copepods collected, Paracalanus crassirostris, Acartia clausi, Oithona brevicornis and Microsetella norvegica were the dominant species and Paracalanus parvus, Centropages abdominalis, Pseudodiaptomus marinus, Eurytemora Pacifica and Acartia erythraea were the subdomdnant species. A few oceanic species were detected only in autumn. The occurrences of these dominant and subdominant copepods by season were as follows: Paracalanus parvus from winter to spring; Paracalanus crassirostris in summer; Centropages abdominalis from winter to spring; Pseudodiaptomus marinus from winter to spring; Eurytemora pacifica in spring; Acartia erythraea in autumn; Acartia clausi in spring; Oithona brevicornis from summer to autumn and Microsetella norvegica throughout the year. The seasonal change in occurrence of most of the copepods species except Microsetella norvegica corresponded to the alternation of hydrographic condition dividing a whole year into 2 periods.