PercaFluV4, Main, Exploration, bibRecord, 000D28

Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population

Identifieur interne : 000D28 ( Main/Exploration ); précédent : 000D27; suivant : 000D29

Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population

Auteurs : Jan Ohlberger [Norvège] ; Ystein Langangen [Norvège] ; Eric Edeline [France] ; David Claessen [France] ; Ian J. Winfield [Royaume-Uni] ; Nils Chr. Stenseth [Norvège] ; L. Asbj Rn V Llestad [Norvège]

Source :

Ecology : (Durham) [ 0012-9658 ] ; 2011.

RBID : Pascal:12-0060571

Descripteurs français

Pascal (Inist)
- Biomasse, Animal jeune, Mortalité, Population naturelle, Pisces, Modèle, Infection, Maladie, Cycle évolutif, Pathogène, Reproduction, Milieu eau douce, Perca fluviatilis.
Wicri :
- topic : Biomasse, Mortalité, Maladie.

English descriptors

KwdEn :
- Animals, Biomass, Disease, Fish Diseases (mortality), Freshwater environment, Great Britain, Infection, Life history, Models, Models, Biological, Mortality, Natural population, Pathogenic, Perca fluviatilis, Perches (growth & development), Pisces, Reproduction, Young animal.
MESH :
- geographic : Great Britain.
- growth & development : Perches.
- mortality : Fish Diseases.
- Animals, Biomass, Models, Biological.

Abstract

Recently developed theoretical models of stage-structured consumer-resource systems have shown that stage-specific biomass overcompensation can arise in response to increased mortality rates. We parameterized a stage-structured population model to simulate the effects of increased adult mortality caused by a pathogen outbreak in the perch (Perca fluviatilis) population of Windermere (UK) in 1976. The model predicts biomass overcompensation by juveniles in response to increased adult mortality due to a shift in food-dependent growth and reproduction rates. Considering cannibalism between life stages in the model reinforces this compensatory response due to the release from predation on juveniles at high mortality rates. These model predictions are matched by our analysis of a 60-year time series of scientific monitoring of Windermere perch, which shows that the pathogen outbreak induced a strong decrease in adult biomass and a corresponding increase in juvenile biomass. Age-specific adult fecundity and size at age were higher after than before the disease outbreak, suggesting that the pathogen-induced mortality released adult perch from competition, thereby increasing somatic and reproductive growth. Higher juvenile survival after the pathogen outbreak due to a release from cannibalism likely contributed to the observed biomass overcompensation. Our findings have general implications for predicting population- and community-level responses to increased size-selective mortality caused by exploitation or disease outbreaks.

Url:

http://prodinra.inra.fr/record/245720

Affiliations:

Le document en format XML

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<series><title level="j" type="main">Ecology : (Durham)</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term>
<term>Biomass</term>
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<term>Freshwater environment</term>
<term>Great Britain</term>
<term>Infection</term>
<term>Life history</term>
<term>Models</term>
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<term>Biomass</term>
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<term>Infection</term>
<term>Maladie</term>
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<term>Perca fluviatilis</term>
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<term>Maladie</term>
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<front><div type="abstract" xml:lang="en">Recently developed theoretical models of stage-structured consumer-resource systems have shown that stage-specific biomass overcompensation can arise in response to increased mortality rates. We parameterized a stage-structured population model to simulate the effects of increased adult mortality caused by a pathogen outbreak in the perch (Perca fluviatilis) population of Windermere (UK) in 1976. The model predicts biomass overcompensation by juveniles in response to increased adult mortality due to a shift in food-dependent growth and reproduction rates. Considering cannibalism between life stages in the model reinforces this compensatory response due to the release from predation on juveniles at high mortality rates. These model predictions are matched by our analysis of a 60-year time series of scientific monitoring of Windermere perch, which shows that the pathogen outbreak induced a strong decrease in adult biomass and a corresponding increase in juvenile biomass. Age-specific adult fecundity and size at age were higher after than before the disease outbreak, suggesting that the pathogen-induced mortality released adult perch from competition, thereby increasing somatic and reproductive growth. Higher juvenile survival after the pathogen outbreak due to a release from cannibalism likely contributed to the observed biomass overcompensation. Our findings have general implications for predicting population- and community-level responses to increased size-selective mortality caused by exploitation or disease outbreaks.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
<li>Norvège</li>
<li>Royaume-Uni</li>
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<country name="France"><region name="Île-de-France"><name sortKey="Edeline, Eric" sort="Edeline, Eric" uniqKey="Edeline E" first="Eric" last="Edeline">Eric Edeline</name>
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<name sortKey="Claessen, David" sort="Claessen, David" uniqKey="Claessen D" first="David" last="Claessen">David Claessen</name>
</country>
<country name="Royaume-Uni"><noRegion><name sortKey="Winfield, Ian J" sort="Winfield, Ian J" uniqKey="Winfield I" first="Ian J." last="Winfield">Ian J. Winfield</name>
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Serveur d'exploration Perca fluviatilis

Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population

Stage-specific biomass overcompensation by juveniles in response to increased adult mortality in a wild fish population

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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