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Influence of growth and reproductive cycle on the meat yield and proximate composition of Hexaplex trunculus (Gastropoda: Muricidae)

Published online by Cambridge University Press:  02 June 2009

P. Vasconcelos*
Affiliation:
Instituto Nacional de Recursos Biológicos (INRB, I. P.)/IPIMAR, Avenida 5 de Outubro s/n, P-8700-305 Olhão, Portugal
M.B. Gaspar
Affiliation:
Instituto Nacional de Recursos Biológicos (INRB, I. P.)/IPIMAR, Avenida 5 de Outubro s/n, P-8700-305 Olhão, Portugal
M. Castro
Affiliation:
Centro de Ciências do Mar (CCMAR), Universidade do Algarve (UAlg), P-8005-139 Faro, Portugal
M.L. Nunes
Affiliation:
Instituto Nacional de Recursos Biológicos (INRB, I. P.)/IPIMAR, Unidade de Valorização dos Produtos da Pesca e da Aquicultura (U-VPPA), Avenida de Brasília, P-1449-006 Lisboa, Portugal
*
Correspondence should be addressed to: P. Vasconcelos, Instituto Nacional de Recursos Biológicos (INRB, I. P.)/IPIMAR, Avenida 5 de Outubro s/n, P-8700-305 Olhão, Portugal email: pvasconcelos@cripsul.ipimar.pt

Abstract

This study aimed to assess the influence of growth and reproductive cycle on the meat yield and proximate composition of the banded murex (Hexaplex trunculus) from the Ria Formosa lagoon (Algarve coast, southern Portugal). Samples of the edible portion (all soft-body tissues) were analysed monthly during one year. The average meat yield was 37.9±4.6%, with females containing more edible content (39.1±4.7%) than males (36.8±4.2%). The proximate composition comprised 70.7±1.4% moisture, 20.1±1.2% protein, 1.6±0.3% fat, 3.0±0.3% ash, and 4.6±1.2% carbohydrate, corresponding to an energetic value of 119.2±7.5 kcal/100 g wet weight. The meat yield was influenced by specimen size, increasing significantly during growth. Both meat yield and proximate composition presented seasonal fluctuations related to the reproductive cycle, which coincided mainly with the periods of maturation and spawning of this species in the Ria Formosa. Finally, H. trunculus meat yield and proximate composition were compared with similar information available for other marine gastropods.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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