Grazing of Various Developmental Stages of Pseudodiaptomus marinus (Copepoda : Calanoida) on Naturally Occurring Particles

日本プランクトン学会報 30 巻 2 号 157-158 頁 1983-11 発行
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ファイル情報(添付)
タイトル ( eng )
Grazing of Various Developmental Stages of Pseudodiaptomus marinus (Copepoda : Calanoida) on Naturally Occurring Particles
タイトル ( jpn )
Pseudodiaptomus marinus(橈脚亜綱: カラヌス目)の各発育段階での天然懸濁粒子の摂食
作成者
Kasahara Shogoro
収録物名
日本プランクトン学会報
30
2
開始ページ 157
終了ページ 158
抄録
Comparative grazing experiments of various developmental stages and sexes of the inshore marine copepod Pseudodiaptomus marinus on naturally occurring particles were carried out. The feeding behavior was similar between both sexes of the adult, but different between developmental stages. The adult females were capable of consuming almost all particles from 2.8 to 63.3 μm diameter, showing selectivity for larger particles (ca. 50 μm) where the peak of particle concentration occurred. The nauplii consumed mainly smaller particles (<30 μm). The consumption by copepodites was intermediate between that of the nauplii and adult females, since they fed upon both smaller and larger particles. Such intraspecific differences of grazing behavior may lead to the effective utilization of heterogeneous natural food resources.

The ingestion rates of the adult females increased linearly with the increase of particle concentrations, without indications of the threshold nor saturation response. The amount of ingested carbon rarely met the requirement for potential egg production which was observed for the wild population. Thus, it was surmised that the adult females could ingest sufficient food deposited on the sea-bottom during a daytime epibenthic phase to attain predicted egg production.
NDC分類
動物学 [ 480 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
日本プランクトン学会
農林水産研究情報センター
発行日 1983-11
権利情報
Copyright (c) 1983 The Plankton Society of Japan
出版タイプ Version of Record(出版社版。早期公開を含む)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0387-8961
[NCID] AN00197015