Across-shelf predatory effect of Pleurobrachia bachei (Ctenophora) on the small-copepod community in the coastal upwelling zone off northern Chile (23° S)

To estimate the predation effect of the predominant ctenophore Pleurobrachia bachei on the small-copepod community in the upwelling area off Mejillones (23°S), northern Chile, a series of oceanographic cruises and predation experiments were conducted in the austral springs 2000, 2001 and 2002. The d...

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Published in:Journal of plankton research 2006-02, Vol.28 (2), p.115-129
Main Authors: Pavez, M. A., Castro, L. R., González, H. E.
Format: Article
Language:English
Subjects:
Abundance
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic crustaceans
Biological and medical sciences
Biomass
Cnidaria. Ctenaria
Coastal upwelling
Coastal zone
Copepoda
Cruises
Daily
Dominant species
Fundamental and applied biological sciences. Psychology
General aspects
Growth rate
Interspecific relationships
Invertebrates
Marine
Marine invertebrates
Ocean circulation
Offshore
Plankton
Pleurobrachia bachei
Population growth
Predation
Secondary production
Synecology
Upwelling
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description To estimate the predation effect of the predominant ctenophore Pleurobrachia bachei on the small-copepod community in the upwelling area off Mejillones (23°S), northern Chile, a series of oceanographic cruises and predation experiments were conducted in the austral springs 2000, 2001 and 2002. The daily consumption rates and predatory effect of P. bachei on the small copepods (in terms of % of standing stock and biomass removed daily) were determined at three stations located in relation to the shelf-break (coastal, shelf-break and oceanic) reaching values up to 4.5% per day of the
doi_str_mv 10.1093/plankt/fbi105
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Determinations of predatory effect on the secondary production of the more abundant small-copepod populations (i.e 26% daily in 2000) suggest that this single species of Pleurobrachia is modulating the population growth rate of the small copepods, the copepod community size structure, and maybe even the alternance of key species in the Mejillones coastal upwelling zone.</description><identifier>ISSN: 0142-7873</identifier><identifier>EISSN: 1464-3774</identifier><identifier>DOI: 10.1093/plankt/fbi105</identifier><identifier>CODEN: JPLRD9</identifier><language>eng</language><publisher>Oxford: Oxford University Press</publisher><subject>Abundance ; Animal and plant ecology ; Animal, plant and microbial ecology ; Aquatic crustaceans ; Biological and medical sciences ; Biomass ; Cnidaria. Ctenaria ; Coastal upwelling ; Coastal zone ; Copepoda ; Cruises ; Daily ; Dominant species ; Fundamental and applied biological sciences. 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A.</creatorcontrib><creatorcontrib>Castro, L. R.</creatorcontrib><creatorcontrib>González, H. E.</creatorcontrib><title>Across-shelf predatory effect of Pleurobrachia bachei (Ctenophora) on the small-copepod community in the coastal upwelling zone off northern Chile (23° S)</title><title>Journal of plankton research</title><addtitle>J. Plankton Res</addtitle><description>To estimate the predation effect of the predominant ctenophore Pleurobrachia bachei on the small-copepod community in the upwelling area off Mejillones (23°S), northern Chile, a series of oceanographic cruises and predation experiments were conducted in the austral springs 2000, 2001 and 2002. The daily consumption rates and predatory effect of P. bachei on the small copepods (in terms of % of standing stock and biomass removed daily) were determined at three stations located in relation to the shelf-break (coastal, shelf-break and oceanic) reaching values up to 4.5% per day of the &lt;1500 µm copepod standing stock. 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identifier ISSN: 0142-7873
ispartof Journal of plankton research, 2006-02, Vol.28 (2), p.115-129
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source Oxford Journals Online
subjects Abundance
Animal and plant ecology
Animal, plant and microbial ecology
Aquatic crustaceans
Biological and medical sciences
Biomass
Cnidaria. Ctenaria
Coastal upwelling
Coastal zone
Copepoda
Cruises
Daily
Dominant species
Fundamental and applied biological sciences. Psychology
General aspects
Growth rate
Interspecific relationships
Invertebrates
Marine
Marine invertebrates
Ocean circulation
Offshore
Plankton
Pleurobrachia bachei
Population growth
Predation
Secondary production
Synecology
Upwelling
title Across-shelf predatory effect of Pleurobrachia bachei (Ctenophora) on the small-copepod community in the coastal upwelling zone off northern Chile (23° S)
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