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Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae

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Title: Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae
Authors: NAKAYA, Mitsuhiro Browse this author
TAKATSU, Tetsuya Browse this author →KAKEN DB
NAKAGAMI, Masayasu Browse this author
JOH, Mikimasa Browse this author
TAKAHASHI, Toyomi Browse this author
Keywords: bottom water temperature
Crangon uritai
Pleuronectes yokohamae
predation
spatial distribution
Issue Date: Jun-2004
Publisher: The Japanese Society of Fisheries Science
Journal Title: Fisheries Science
Volume: 70
Issue: 3
Start Page: 445
End Page: 455
Publisher DOI: 10.1111/j.1444-2906.2004.00824.x
Abstract: To examine predation on larval and juvenile Pleuronectes yokohamae by Crangon uritai, the spatial distribution and feeding habits of C. uritai were studied. Crangon uritai fed on various prey, including P. yokohamae. Density-dependent predation on juvenile Crangon spp., larval and juvenile gobiid fish Chaenogobius heptacanthus, mysids, and gammarids was observed. The abundance of alternative prey might, therefore, play an important role in reducing the pressure of predation on P. yokohamae. In each year, C. uritai migrated from depths of 10 m in March to depths of 3 m in May. There was a significant negative correlation between the weighted mean depth (WMD) of C. uritai and the weighted mean bottom water temperature (WMBWT). The migration was, therefore, delayed in the cold spring, during which C. uritai occupied depths of approximately 10 m. In contrast, no significant correlation was found between the WMD of P. yokohamae and WMBWT. Settlement of P. yokohamae began at depths of 15 m, mainly during early April. The spatial distributions of these two organisms show greater overlap during the cold spring, resulting in increased opportunities for predation.
Rights: © 2004 公益社団法人日本水産学会
© 2004 The Japanese Society of Fisheries Science
Type: article (author version)
URI: http://hdl.handle.net/2115/14609
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高津 哲也

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