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Individual variation in life history characteristics can influence extinction risk

Identifieur interne : 000329 ( PascalFrancis/Corpus ); précédent : 000328; suivant : 000330

Individual variation in life history characteristics can influence extinction risk

Auteurs : Henriëtte I. Jager

Source :

RBID : Pascal:02-0202290

Descripteurs français

English descriptors

Abstract

The white sturgeon (Acipenser transmontanus) shows great individual variation in the age at maturation. This study examines the consequences of model assumptions about individual variation in the age at maturation on predicted population viability. I considered: (1) the effects of variation in age at maturation alone; (2) the effects of heritability; and (3) the influence of a stable and an altered selective regime. Two selective regimes represented conditions before and after the impoundment of a river, blocking access of anadromous white sturgeon populations to the ocean. In contrast to previous simulation studies, I found that increased individual variation in the age at maturity did not necessarily lead to a higher likelihood of persistence. Individual variation increased the simulated likelihood of persistence when the variation was heritable and the selective regime had changed such that the mean age at maturity was no longer optimal.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

pA  
A01 01  1    @0 0304-3800
A02 01      @0 ECMODT
A03   1    @0 Ecol. model.
A05       @2 144
A06       @2 1
A08 01  1  ENG  @1 Individual variation in life history characteristics can influence extinction risk
A11 01  1    @1 JAGER (Henriëtte I.)
A14 01      @1 Environmental Sciences Division, Oak Ridge National Laboratory, P.O. 2008 @2 Oak Ridge, TN 37831-6036 @3 USA @Z 1 aut.
A20       @1 61-76
A21       @1 2001
A23 01      @0 ENG
A43 01      @1 INIST @2 15732 @5 354000099583320060
A44       @0 0000 @1 © 2002 INIST-CNRS. All rights reserved.
A45       @0 1 p.3/4
A47 01  1    @0 02-0202290
A60       @1 P
A61       @0 A
A64 01  1    @0 Ecological modelling
A66 01      @0 NLD
C01 01    ENG  @0 The white sturgeon (Acipenser transmontanus) shows great individual variation in the age at maturation. This study examines the consequences of model assumptions about individual variation in the age at maturation on predicted population viability. I considered: (1) the effects of variation in age at maturation alone; (2) the effects of heritability; and (3) the influence of a stable and an altered selective regime. Two selective regimes represented conditions before and after the impoundment of a river, blocking access of anadromous white sturgeon populations to the ocean. In contrast to previous simulation studies, I found that increased individual variation in the age at maturity did not necessarily lead to a higher likelihood of persistence. Individual variation increased the simulated likelihood of persistence when the variation was heritable and the selective regime had changed such that the mean age at maturity was no longer optimal.
C02 01  X    @0 002A14A02
C03 01  X  FRE  @0 Cycle évolutif @5 01
C03 01  X  ENG  @0 Life history @5 01
C03 01  X  SPA  @0 Ciclo evolutivo @5 01
C03 02  X  FRE  @0 Extinction population @5 02
C03 02  X  ENG  @0 Population extinction @5 02
C03 02  X  SPA  @0 Extinción población @5 02
C03 03  X  FRE  @0 Analyse risque @5 03
C03 03  X  ENG  @0 Risk analysis @5 03
C03 03  X  SPA  @0 Análisis riesgo @5 03
C03 04  X  FRE  @0 Comparaison interindividuelle @5 04
C03 04  X  ENG  @0 Interindividual comparison @5 04
C03 04  X  SPA  @0 Comparación interindividual @5 04
C03 05  X  FRE  @0 Age @5 05
C03 05  X  ENG  @0 Age @5 05
C03 05  X  SPA  @0 Edad @5 05
C03 06  X  FRE  @0 Maturation sexuelle @5 06
C03 06  X  ENG  @0 Sexual maturation @5 06
C03 06  X  SPA  @0 Maduración sexual @5 06
C03 07  X  FRE  @0 Viabilité @5 07
C03 07  X  ENG  @0 Viability @5 07
C03 07  X  SPA  @0 Viabilidad @5 07
C03 08  X  FRE  @0 Persistance @5 08
C03 08  X  ENG  @0 Persistence @5 08
C03 08  X  SPA  @0 Persistencia @5 08
C03 09  X  FRE  @0 Population animale @5 09
C03 09  X  ENG  @0 Animal population @5 09
C03 09  X  SPA  @0 Población animal @5 09
C03 10  X  FRE  @0 Milieu aquatique @5 11
C03 10  X  ENG  @0 Aquatic environment @5 11
C03 10  X  SPA  @0 Medio acuático @5 11
C03 11  X  FRE  @0 Modèle @5 12
C03 11  X  ENG  @0 Models @5 12
C03 11  X  SPA  @0 Modelo @5 12
C03 12  X  FRE  @0 Acipenser transmontanus @2 NS @5 55
C03 12  X  ENG  @0 Acipenser transmontanus @2 NS @5 55
C03 12  X  SPA  @0 Acipenser transmontanus @2 NS @5 55
C07 01  X  FRE  @0 Pisces @2 NS
C07 01  X  ENG  @0 Pisces @2 NS
C07 01  X  SPA  @0 Pisces @2 NS
C07 02  X  FRE  @0 Vertebrata @2 NS
C07 02  X  ENG  @0 Vertebrata @2 NS
C07 02  X  SPA  @0 Vertebrata @2 NS
C07 03  X  FRE  @0 Acipenseridae @2 NS @4 INC @5 70
N21       @1 119
N82       @1 PSI

Format Inist (serveur)

NO : PASCAL 02-0202290 INIST
ET : Individual variation in life history characteristics can influence extinction risk
AU : JAGER (Henriëtte I.)
AF : Environmental Sciences Division, Oak Ridge National Laboratory, P.O. 2008/Oak Ridge, TN 37831-6036/Etats-Unis (1 aut.)
DT : Publication en série; Niveau analytique
SO : Ecological modelling; ISSN 0304-3800; Coden ECMODT; Pays-Bas; Da. 2001; Vol. 144; No. 1; Pp. 61-76; Bibl. 1 p.3/4
LA : Anglais
EA : The white sturgeon (Acipenser transmontanus) shows great individual variation in the age at maturation. This study examines the consequences of model assumptions about individual variation in the age at maturation on predicted population viability. I considered: (1) the effects of variation in age at maturation alone; (2) the effects of heritability; and (3) the influence of a stable and an altered selective regime. Two selective regimes represented conditions before and after the impoundment of a river, blocking access of anadromous white sturgeon populations to the ocean. In contrast to previous simulation studies, I found that increased individual variation in the age at maturity did not necessarily lead to a higher likelihood of persistence. Individual variation increased the simulated likelihood of persistence when the variation was heritable and the selective regime had changed such that the mean age at maturity was no longer optimal.
CC : 002A14A02
FD : Cycle évolutif; Extinction population; Analyse risque; Comparaison interindividuelle; Age; Maturation sexuelle; Viabilité; Persistance; Population animale; Milieu aquatique; Modèle; Acipenser transmontanus
FG : Pisces; Vertebrata; Acipenseridae
ED : Life history; Population extinction; Risk analysis; Interindividual comparison; Age; Sexual maturation; Viability; Persistence; Animal population; Aquatic environment; Models; Acipenser transmontanus
EG : Pisces; Vertebrata
SD : Ciclo evolutivo; Extinción población; Análisis riesgo; Comparación interindividual; Edad; Maduración sexual; Viabilidad; Persistencia; Población animal; Medio acuático; Modelo; Acipenser transmontanus
LO : INIST-15732.354000099583320060
ID : 02-0202290

Links to Exploration step

Pascal:02-0202290

Le document en format XML

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