If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Forage fish of the Pacific Rim as revealed by diet of a piscivorous seabird: synchrony and relationships with sea surface temperature

$50.00 plus tax (Refund Policy)

Buy Article:

Abstract:

We tested the hypothesis of synchronous interannual changes in forage fish dynamics around the North Pacific Rim. To do this, we sampled forage fish communities using a seabird predator, the rhinoceros auklet (Cerorhinca monocerata), at six coastal study sites from Japan to California. We investigated whether take of forage fishes was related to local marine conditions as indexed by sea surface temperature (SST). SST was concordant across sites in the eastern Pacific, but inversely correlated between east and west. Forage fish communities consisted of anchovy (Engraulis spp.), sandlance (Ammodytes spp.), capelin (Mallotus spp.), and juvenile rockfish (Sebastes spp.), among others, and take of forage fish varied in response to interannual and possibly lower-frequency oceanographic variability. Take of primary forage species were significantly related to changes in SST only at the eastern sites. We found synchrony in interannual variation of primary forage fishes across several regions in the eastern Pacific, but no significant east–west correlations. Specifically in the Japan Sea, factors other than local SST or interannual variability may more strongly influence forage fishes. Predator diet sampling offers a fishery-independent, large-scale perspective on forage fish dynamics that may be difficult to obtain using conventional means of study.

Nous testons l’hypothèse qui veut qu’il y ait des changements interannuels synchrones dans les dynamiques des poissons fourrage autour de la bordure du Pacifique Nord. C’est pourquoi nous avons échantillonné les peuplements de poissons fourrage à l’aide d’un oiseau marin prédateur, le macareux rhinocéros (Cerorhinca monocerata), à six sites d’étude côtiers du Japon à la Californie. Nous avons vérifié si les captures de poissons fourrage sont reliées aux conditions marines locales, telles que représentées par la température de surface de la mer (SST). Les SST s’accordent d’un site à l’autre dans l’est du Pacifique, mais il y a une corrélation inverse entre l’est et l’ouest. Les peuplements de poissons fourrage consistent, entre autres, d’anchois (Engraulis spp.), de lançons (Ammodytes spp.), de capelans (Mallotus spp.) et de jeunes sébastes (Sebastes spp.) et la capture de poissons fourrage varie en réaction à la variabilité océanographique interannuelle ou aussi peut-être de fréquence moins élevée. La capture de poissons fourrage principaux est en corrélation significative avec SST seulement dans les sites de l’est. Nous observons un synchronisme dans la variation interannuelle des poissons fourrage principaux entre plusieurs régions de l’est du Pacifique, mais aucune corrélation significative entre l’est et l’ouest. Tout particulièrement dans la mer du Japon, des facteurs autres que la SST locale et la variabilité interannuelle peuvent influencer plus fortement les poissons fourrage. L’échantillonnage du régime alimentaire des prédateurs permet d’obtenir, indépendamment de la pêche commerciale, une perspective à grande échelle de la dynamique des poissons fourrage qu’il serait peut-être difficile d’acquérir par les méthodes d’étude conventionnelles.

Document Type: Research Article

Publication date: August 1, 2008

More about this publication?
  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more