DupuchMagnanBertoloEtAl2009

Référence

Dupuch, A., Magnan, P., Bertolo, A., Dill, L.M. and Proulx, M. (2009) Does predation risk influence habitat use by northern redbelly dace Phoxinus eos at different spatial scales? Journal of Fish Biology, 74(7):1371-1382. (Scopus )

Résumé

This study investigated the relationship between spatial variations in predation risk and abundance of northern redbelly dace Phoxinus eos at both macroscale (littoral v. pelagic zones) and microscale (structured v. open water habitats in the littoral zone) of Canadian Shield lakes. Minnow traps were placed in both structured and open water habitats in the littoral zone of 13 Canadian Shield lakes, and estimates of the relative predation risk of P. eos in both the pelagic and the littoral zones were obtained from tethering experiments. Results showed that (1) the mean abundance of P. eos in the littoral zone was positively correlated with the relative predation risk in the pelagic zone, (2) P. eos preferentially used structured over open water habitats in the littoral zone and (3) this preference was not related to the relative predation risk in the littoral zone but decreased as the relative predation risk increased in the pelagic zone. At the lake level, these results support the hypothesis that P. eos enter the littoral zone to avoid pelagic piscivores. At the littoral zone level, the results do not necessarily contradict the widely accepted view that P. eos preferentially use structured over open habitats to reduce their predation risk, but suggest that flexibility in antipredator tactics (e.g. shelter use v. shoaling) could explain the spatial distribution of P. eos between structured and open water habitats.

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@ARTICLE { DupuchMagnanBertoloEtAl2009,
    AUTHOR = { Dupuch, A. and Magnan, P. and Bertolo, A. and Dill, L.M. and Proulx, M. },
    TITLE = { Does predation risk influence habitat use by northern redbelly dace Phoxinus eos at different spatial scales? },
    JOURNAL = { Journal of Fish Biology },
    YEAR = { 2009 },
    VOLUME = { 74 },
    PAGES = { 1371-1382 },
    NUMBER = { 7 },
    NOTE = { cited By (since 1996)7 },
    ABSTRACT = { This study investigated the relationship between spatial variations in predation risk and abundance of northern redbelly dace Phoxinus eos at both macroscale (littoral v. pelagic zones) and microscale (structured v. open water habitats in the littoral zone) of Canadian Shield lakes. Minnow traps were placed in both structured and open water habitats in the littoral zone of 13 Canadian Shield lakes, and estimates of the relative predation risk of P. eos in both the pelagic and the littoral zones were obtained from tethering experiments. Results showed that (1) the mean abundance of P. eos in the littoral zone was positively correlated with the relative predation risk in the pelagic zone, (2) P. eos preferentially used structured over open water habitats in the littoral zone and (3) this preference was not related to the relative predation risk in the littoral zone but decreased as the relative predation risk increased in the pelagic zone. At the lake level, these results support the hypothesis that P. eos enter the littoral zone to avoid pelagic piscivores. At the littoral zone level, the results do not necessarily contradict the widely accepted view that P. eos preferentially use structured over open habitats to reduce their predation risk, but suggest that flexibility in antipredator tactics (e.g. shelter use v. shoaling) could explain the spatial distribution of P. eos between structured and open water habitats. },
    AUTHOR_KEYWORDS = { Antipredator behaviour; Diel horizontal migration; Habitat selection; Habitat structural complexity; Shelter use; Tethering experiment },
    CODEN = { JFIBA },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/j.1095-8649.2009.02183.x },
    ISSN = { 00221112 },
    KEYWORDS = { fresh water, animal; article; behavior; Canada; Cypriniformes; ecosystem; physiology; predation; risk, Animals; Canada; Cyprinidae; Ecosystem; Fresh Water; Predatory Behavior; Risk; Spatial Behavior, Cyprinidae; Phoxinus eos },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-65449143574&partnerID=40&md5=020540bc80c92d44d5704b9d5938b890 },
}

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