The University of Southampton
University of Southampton Institutional Repository

Long-term changes in benthopelagic fish abundance in the abyssal N.E. Pacific Ocean

Long-term changes in benthopelagic fish abundance in the abyssal N.E. Pacific Ocean
Long-term changes in benthopelagic fish abundance in the abyssal N.E. Pacific Ocean
Food web structure, particularly the relative importance of bottom-up and top-down control of animal abundances, is poorly known for the Earth's largest habitats: the abyssal plains. A unique 15-yr time series of climate, productivity, particulate flux, and abundance of primary consumers (primarily echinoderms) and secondary consumers (fish) was examined to elucidate the response of trophic levels to temporal variation in one another. Towed camera sled deployments in the abyssal northeast Pacific (4100 m water depth) showed that annual mean numbers of the dominant fish genus (Coryphaenoides spp.) more than doubled over the period 1989–2004. Coryphaenoides spp. abundance was significantly correlated with total abundance of mobile epibenthic megafauna (echinoderms), with changes in fish abundance lagging behind changes in the echinoderms. Direct correlations between surface climate and fish abundances, and particulate organic carbon (POC) flux and fish abundances, were insignificant, which may be related to the varied response of the potential prey taxa to climate and POC flux. This study provides a rare opportunity to study the long-term dynamics of an unexploited marine fish population and suggests a dominant role for bottom-up control in this system.

0012-9658
549-555
Bailey, D.M.
0d4b3901-760a-42d2-9623-f98e5afb9719
Ruhl, H.A.
177608ef-7793-4911-86cf-cd9960ff22b6
Smith, K.L.
a5d7bde4-722a-4989-92dc-86dd85d26786
Bailey, D.M.
0d4b3901-760a-42d2-9623-f98e5afb9719
Ruhl, H.A.
177608ef-7793-4911-86cf-cd9960ff22b6
Smith, K.L.
a5d7bde4-722a-4989-92dc-86dd85d26786

Bailey, D.M., Ruhl, H.A. and Smith, K.L. (2006) Long-term changes in benthopelagic fish abundance in the abyssal N.E. Pacific Ocean. Ecology, 87 (3), 549-555. (doi:10.1890/04-1832).

Record type: Article

Abstract

Food web structure, particularly the relative importance of bottom-up and top-down control of animal abundances, is poorly known for the Earth's largest habitats: the abyssal plains. A unique 15-yr time series of climate, productivity, particulate flux, and abundance of primary consumers (primarily echinoderms) and secondary consumers (fish) was examined to elucidate the response of trophic levels to temporal variation in one another. Towed camera sled deployments in the abyssal northeast Pacific (4100 m water depth) showed that annual mean numbers of the dominant fish genus (Coryphaenoides spp.) more than doubled over the period 1989–2004. Coryphaenoides spp. abundance was significantly correlated with total abundance of mobile epibenthic megafauna (echinoderms), with changes in fish abundance lagging behind changes in the echinoderms. Direct correlations between surface climate and fish abundances, and particulate organic carbon (POC) flux and fish abundances, were insignificant, which may be related to the varied response of the potential prey taxa to climate and POC flux. This study provides a rare opportunity to study the long-term dynamics of an unexploited marine fish population and suggests a dominant role for bottom-up control in this system.

Full text not available from this repository.

More information

Published date: March 2006

Identifiers

Local EPrints ID: 71794
URI: http://eprints.soton.ac.uk/id/eprint/71794
ISSN: 0012-9658
PURE UUID: 847633c0-7c13-4c07-aed0-57207724a45f

Catalogue record

Date deposited: 22 Dec 2009
Last modified: 19 Jul 2019 23:44

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×