Biological reference points based on spawning stock biomass levels:the case of red mullet (Mullus barbatus L., 1758) (Articolo in rivista)

Type
Label
  • Biological reference points based on spawning stock biomass levels:the case of red mullet (Mullus barbatus L., 1758) (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Spedicato M.T., Carbonara P., Rinelli P., Silecchia T., Lembo G. (2006)
    Biological reference points based on spawning stock biomass levels:the case of red mullet (Mullus barbatus L., 1758)
    in Biologia marina mediterranea
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Spedicato M.T., Carbonara P., Rinelli P., Silecchia T., Lembo G. (literal)
Pagina inizio
  • 112 (literal)
Pagina fine
  • 123 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 13 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • COISPA IAMC-CNR, Messina (literal)
Titolo
  • Biological reference points based on spawning stock biomass levels:the case of red mullet (Mullus barbatus L., 1758) (literal)
Abstract
  • Biological rejerence points ojten reflect the combination oj several components of stock dynamics (growth, recruitment and mortality) into a single index. In addition, the BRPs identify fargel and threshold levels to consider jor a sustainable fishery (Precautionary BRP). Facing the problem of identification of suitable BRPs, two main aspects are often addressed in Mediterranean, i.e. testing the potential of indicators used in other geographical regions (e.g. ICES context) and evaluating BRPs that better incorporate the biological technical specific characteristics of the area. The objective of this paper is to test BRPs based on the spawning stock biomass (SSB), using as case study the stock oj red mullet oj the central-southern Tyrrhenian Sea (GSA lO). Data (abundance indices and demographic structure of the population) are from the bottom trawl surveys GRUND and MEDITS carried out since 1994. Growth and total mortality, with associated variability, were estimated following the temporal evolution of the different cohorts, which were separated using a maximum likelihood estimator. Maturity and size at first capture were estimated as well, the latter from selectivity experiments conducted in the area. All these estimates were the input of a stochastic simulation model (biomass pool dynamic mode/) based on the Thompson & Beli approach. The condition of M. barbatus (Osteichthyes, Perciformes) stock was thus modelled accounting for fluctuations in the growth parameters, recruitment and maturity. Safe.levels occurred when.the.ratios SSBISSBV and SSBIB were respectively 20 and 70%, corresponding to BIR of 13-14 g and to an exploitation rate of -0.5. Considering the multispecies-multigear characteristics of the Mediterranean fishery, suitable management options could be represented by the enforcement of the area and temporal closure. (literal)
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