FN Archimer Export Format
PT J
TI Temporal trends in age and size at maturation of four North Sea gadid species: cod, haddock, whiting and Norway pout
BT 
AF MARTY, Lise
   ROCHET, Marie-Joelle
   ERNANDE, Bruno
AS 1:1;2:2;3:1,3;
FF 1:;2:PDG-RBE-EMH;3:PDG-RBE-HMMN-RHBL;
C1 IFREMER, Lab Ressources Halieut, F-62321 Boulogne Sur Mer, France.
   IFREMER, F-44311 Nantes 03, France.
   Int Inst Appl Syst Anal, Evolut & Ecol Program, A-2361 Laxenburg, Austria.
C2 IFREMER, FRANCE
   IFREMER, FRANCE
   IIASA, AUSTRIA
SI NANTES
   BOULOGNE
SE PDG-RBE-EMH
   PDG-RBE-HMMN-RHBL
IN WOS Ifremer jusqu'en 2018
   copubli-europe
IF 2.619
TC 21
UR https://archimer.ifremer.fr/doc/00180/29152/27559.pdf
LA English
DT Article
CR IBTS 2000
   IBTS 2001
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   IBTS 2010
   IBTS 2011
   IBTS 92/2
   IBTS 93/1
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   IBTS 94/1
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   IBTS 95/1
   IBTS 95/2
   IBTS 96/1
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   IBTS 97
   IBTS 98
   IBTS 99
BO Thalassa
DE ;Probabilistic maturation reaction norm;Demography;Phenotypic plasticity;Fisheries-induced evolution;Life-history strategy;Maturity;Growth;Reproductive investment
AB Younger ages and smaller sizes at maturation have been observed in commercial fish stocks over the last century. We establish that age and length at 50% proportion mature (i.e. the proportion of mature individuals in a population or the probability that an individual is mature) decreased from the 1970s to the 2000s in North Sea cod Gadus morhua, haddock Melanogrammus aeglefinus and whiting Merlangius merlangus, but not in Norway pout Trisopterus esmarkii. The potential contributions of demography, phenotypic plasticity and evolution to these trends were assessed. First, maturation trends were extricated from demographic effects and growth-dependent plasticity by estimating probabilistic maturation reaction norms (PMRNs). PMRN midpoints have significantly shifted downwards at most ages for cod, haddock and whiting, but not for Norway pout. Second, increased temperature and food abundance, loosened trophic competition and relaxed social pressure may also trigger growth-independent plasticity in maturation. Principal component regression of PMRN midpoints on annual estimates of relevant environmental variables exhibiting a temporal trend suggest that, despite some evidence of environmental effects, PMRN trends were mostly independent of growth-independent plasticity in haddock, whiting and male cod, but not in female cod. According to these findings, evolution of maturation, potentially in response to fishing, is plausible in haddock, whiting and male cod, but unlikely for Norway pout, and does not explain trends in female cod maturation. In agreement with life-history theory, the maturation response was larger in fast-growing, late- and large-maturing species exhibiting moderate reproductive effort.
PY 2014
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 497
UT 000330723600014
BP 179
EP 197
DI 10.3354/meps10580
ID 29152
ER

EF