A century of fish biomass decline in the ocean

A century of fish biomass decline in the ocean

Contribution to the Theme Section ‘Trophodynamics in marine ecology’.-- 12 pages, 7 figures, 3 tables, supplementary material https://doi.org/10.3354/meps10946

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Main Authors: Christensen, Villy, Coll, Marta, Piroddi, Chiara, Steenbeek, Jeroen, Buszowski, Joe, Daniel, Pauly
Format: artículo biblioteca
Published: Inter Research 2014-10-09
Subjects:Fish biomass, Fishing down marine food webs, Trends, Ecosystem models, Global distribution,
Online Access:http://hdl.handle.net/10261/104259
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spelling dig-icm-es-10261-1042592020-12-09T17:47:50Z A century of fish biomass decline in the ocean Christensen, Villy Coll, Marta Piroddi, Chiara Steenbeek, Jeroen Buszowski, Joe Daniel, Pauly Fish biomass Fishing down marine food webs Trends Ecosystem models Global distribution Contribution to the Theme Section ‘Trophodynamics in marine ecology’.-- 12 pages, 7 figures, 3 tables, supplementary material https://doi.org/10.3354/meps10946 We performed a global assessment of how fish biomass has changed over the last 100 yr, applying a previously developed methodology using ecological modeling. Our assessment built on more than 200 food web models representing marine ecosystems throughout the world covering the period from 1880 to 2007. All models were constructed based on the same approach, and have been previously documented. We spatially and temporally distributed fish biomasses delivered by these models based on fish habitat preferences, ecology, and feeding conditions. From these distributions, we extracted over 68000 estimates of biomass (for predatory and prey fishes separately, including trophic level of 3.5 or higher, and trophic level between 2.0 and 3.0, respectively), and predicted spatial-temporal trends in fish biomass using multiple regression. Our results predicted that the biomass of predatory fish in the world oceans has declined by twothirds over the last 100 yr. This decline is accelerating, with 54% occurring in the last 40 yr. Results also showed that the biomass of prey fish has increased over the last 100 yr, likely as a consequence of predation release. These findings allowed us to predict that there will be fish in the future ocean, but the composition of fish assemblages will be very different from current ones, with small prey fish dominating. Our results show that the trophic structure of marine ecosystems has changed at a global scale, in a manner consistent with fishing down marine food webs. © Inter-Research 2014 This is a contribution from Sea Around Us, a scientific cooperation between the University of British Columbia (UBC) and the Pew Charitable trust. V.C. acknowledges support from the Natural Sciences and Engineering Research Council of Canada. M.C. was partially funded by the EC Marie Curie Career Integration Grant Fellowships to the BIOWEB project and the Spanish National Program Ramon y Cajal. Peer Reviewed 2014-11-04T09:20:06Z 2014-11-04T09:20:06Z 2014-10-09 2014-11-04T09:20:06Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.3354/meps10946 issn: 0171-8630 e-issn: 1616-1599 Marine Ecology Progress Series 512: 155-166 (2014) http://hdl.handle.net/10261/104259 10.3354/meps10946 https://doi.org/10.3354/meps10946 open Inter Research
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
topic Fish biomass
Fishing down marine food webs
Trends
Ecosystem models
Global distribution
Fish biomass
Fishing down marine food webs
Trends
Ecosystem models
Global distribution
spellingShingle Fish biomass
Fishing down marine food webs
Trends
Ecosystem models
Global distribution
Fish biomass
Fishing down marine food webs
Trends
Ecosystem models
Global distribution
Christensen, Villy
Coll, Marta
Piroddi, Chiara
Steenbeek, Jeroen
Buszowski, Joe
Daniel, Pauly
A century of fish biomass decline in the ocean
description Contribution to the Theme Section ‘Trophodynamics in marine ecology’.-- 12 pages, 7 figures, 3 tables, supplementary material https://doi.org/10.3354/meps10946
format artículo
topic_facet Fish biomass
Fishing down marine food webs
Trends
Ecosystem models
Global distribution
author Christensen, Villy
Coll, Marta
Piroddi, Chiara
Steenbeek, Jeroen
Buszowski, Joe
Daniel, Pauly
author_facet Christensen, Villy
Coll, Marta
Piroddi, Chiara
Steenbeek, Jeroen
Buszowski, Joe
Daniel, Pauly
author_sort Christensen, Villy
title A century of fish biomass decline in the ocean
title_short A century of fish biomass decline in the ocean
title_full A century of fish biomass decline in the ocean
title_fullStr A century of fish biomass decline in the ocean
title_full_unstemmed A century of fish biomass decline in the ocean
title_sort century of fish biomass decline in the ocean
publisher Inter Research
publishDate 2014-10-09
url http://hdl.handle.net/10261/104259
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