Nom du corpus

Corpus Systématique Animale

Titre du document

Reproductive styles and life history variables relative to exploitation and management of Sebastes stocks

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Rockfish
  • Longevity
  • Reproductive value
  • Fisheries
  • Scorpaenidae
Nom du fichier dans la ressource
Poissons_v2b_003605
Auteur(s)
  • Bruce M. Leaman
Affiliation(s)
  • Biological Sciences Branch, Pacific Biological Station, Fisheries & Oceans Canada, V9R 5K6, Nanaimo, British Columbia, Canada
Résumé

Synopsis: The characteristics of lightly and heavily exploited Pacific ocean perch,Sebastes alutus, stocks are evaluated relative to the predictions of life history theory. These long-lived species (50–100 year lifespan) show limited phenotypic plasticity and have little buffering against the effects of reduced lifespan. Reduced stock abundance has generated some compensatory increase in growth rate. Length at first maturity varies only slightly with increased growth rate, although age at maturity may decrease by 1–4 years. Grooth increases yield larger (15–20%) size at age and increased reproductive effort at younger ages, but lower size-specific fecundity for these faster-growing fish. This suggests an energy allocation protocol favouring growth over reproduction in these long-lived animals. Rockfishes have late recruitment to fisheries (ages 10–15), and the detection time for results of management actions is equally long. Their vulnerability to overfishing means that indices of population changes, more representative of fishing effects than the catch rate index presently used, are required. Reproductive value indices are shown to be extremely sensitive and continuous with population abundance changes. Their incorporation into monitoring programs would permit more timely evaluation of management actions. Management policies developed for shorter-lived species are shown to be inappropriate for rockfishes. The need for an improved match in the time frame of the species' life history, and that of management strategies, is stressed.

Catégories Science-Metrix
  • 1 - applied sciences
  • 2 - agriculture, fisheries & forestry
  • 3 - fisheries
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - vertebres: zoologie generale, morphologie, phylogenese, systematique, cytogenetique, repartition geographique
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
  • 1 - science ; 2 - ecology
Identifiant ISTEX
B04341CCCF1F41B981DC9C279287418D576F3332
Revue

Environmental Biology of Fishes

Année de publication
1991
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.616
Sous-corpus
  • Poissons
Type de publication
Journal
ark:/67375/1BB-700TDK0P-C
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