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Age and growth, mortality and reproduction of the striped sea bream, Lithognathus mormyrus Linnaeus 1758, from the south coast of Portugal (Algarve)
Monteiro, P.; Bentes, L.; Coelho, R.; Correia, C.; Erzini, K.; Lino, P.G.; Ribeiro, J.; Gonçalves, J.M.S. (2010). Age and growth, mortality and reproduction of the striped sea bream, Lithognathus mormyrus Linnaeus 1758, from the south coast of Portugal (Algarve). Mar. Biol. Res. 6(1): 53-65. http://dx.doi.org/10.1080/17451000903039731
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019
Peer reviewed article  
Beschikbaar in  Auteurs 
Trefwoorden
    Age
    Growth
    Management > Resource management > Fishery management
    Population functions > Mortality
    Reproduction
    Lithognathus mormyrus (Linnaeus, 1758) [WoRMS]
    Algarve [Marine Regions]
    Marien/Kust
Author keywords
    Age; growth; reproduction; mortality; Lithognathus mormyrus; fisheriesmanagement
Auteurs  Top 
  • Monteiro, P.
  • Bentes, L.
  • Coelho, R.
  • Correia, C.
  • Erzini, K.
  • Lino, P.G.
  • Ribeiro, J.
  • Gonçalves, J.M.S.
Abstract
    The striped sea bream, Lithognathus mormyrus, used for this population dynamics study were obtained from longline catches and market sampling in the Algarve (south Portugal). The macroscopic analysis of the gonads and the gonad somatic index showed that the south Portuguese population of L. mormyrus spawns mainly between late spring and summer (June to August). The length at first maturity was similar for males and females and the value for both sexes combined was estimated to be 16.08 cm, corresponding to an age between 1 and 2 years. Fish age classes (0 to 13) were determined by reading growth rings on whole otoliths. Age determination was validated by marginal increment analysis. The estimated parameters of the von Bertalanffy growth equation were L∞=35.30 cm, K=0.264 and t 0= - 0.809. Mortality rates were calculated for fish captured with longlines, and the estimated parameters were M=0.356, Z=0.622 and F=0.266. From an Algarve fishery management perspective, these results suggest the need for an increase in the minimum landing size (from 15 to 17 cm), which should be beneficial for the sustainability and conservation of this species. The results also showed that fishing with longlines off the Algarve coast may allow for a sustainable use of the resource.
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