A New Asymmetrical Near-bottom Calanoid Copepod, Paramisophria platysoma, with Observations of Its Integumental Organs, Behavior and In-situ Feeding Habit

日本プランクトン学会報 Volume 36 Issue 2 Page 87-101 published_at 1990-02
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Title ( eng )
A New Asymmetrical Near-bottom Calanoid Copepod, Paramisophria platysoma, with Observations of Its Integumental Organs, Behavior and In-situ Feeding Habit
Title ( jpn )
非対称の体を持つ近底層カラヌス目カイアシ類の1新種Paramisophria platysomaの記載及びその皮殻器官, 行動, 天然餌料
Creator
Mitsuzumi Chikanobu
Source Title
日本プランクトン学会報
Volume 36
Issue 2
Start Page 87
End Page 101
Abstract
A new hyperbenthic calanoid copepod, Paramisophria platysoma collected from the littoral and sublittoral zones on the Pacific coast of Japan is described. The new species has a remarkably asymmetrical body with the left lateral side compressed. However, a SEM examination revealed that the integumental organs of the female cephalothorax are nearly symmetrically distributed. Three different patterns of behavior of living copepods were observed using a VHS tape recorder sytem: (1) usual, continuous swimming with the compressed left lateral side parallel to the bottom, using antennae 2, mandibular palps and maxillae 1; (2) fast "jumping" possibly with flaps of swimming legs; and (3) resting with the left lateral side just on the bottom. The gut content analysis of adult females showed that they fed carnivorously on benthic harpacticoid nauplii and copepodids. Their asymmetrical bodies, peculiar swimming behavior and feeding habit dependent on benthic organisms seem to be adaptations to a hyperbenthic life in shallow waters.
NDC
Zoology [ 480 ]
Language
eng
Resource Type journal article
Publisher
日本プランクトン学会
Date of Issued 1990-02
Rights
Copyright (c) 1990 The Plankton Society of Japan
Publish Type Version of Record
Access Rights open access
Source Identifier
[ISSN] 0387-8961
[NCID] AN00197015