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大村湾における動物プランクトンに関する研究-1 : 橈脚類の季節的出現


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Title: 大村湾における動物プランクトンに関する研究-1 : 橈脚類の季節的出現
Other Titles: Studies on the Zooplankton in Omura Bay―I Seasonal Occurrences of Copepods
Authors: 伊藤, 栄樹 / 飯塚, 昭二
Authors (alternative): Itoh, Hideki / Iizuka, Shoji
Issue Date: Aug-1979
Publisher: 長崎大学水産学部
Citation: 長崎大学水産学部研究報告, v.47, pp.5-14; 1979
Abstract: 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. / 大村湾における橈脚類の季節的遷移を海況との関連で述べた。採集および調査を湾内の26測点で1976年1月,3月,5月,7月,9月および11月に実施した。同定された橈脚類は15属24種で,そのうちParacalanus crassirostris, Acartia clausi, Oithona brevicornisおよびMicrosetella novegicaが優占種であり,Paracalanus parvus, Centropages abdominalis, Eurytemora pacifica, Pseudodiaptomus marinusおよびAcartia erythraeaが亜優占種であった。このことから大村湾の橈脚類は内湾性の強い群集組成であることが推察された。周年出現するMicrosetella norvegicaを除いて,これら優占種および亜優占種は水温および塩分の季節的変化に対応した季節的消長を示した。
URI: http://hdl.handle.net/10069/30611
ISSN: 05471427
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:第47号

Citable URI : http://hdl.handle.net/10069/30611

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