Growth and production of the venerid bivalve Eurhomalea exalbida in the Beagle Channel, Tierra del Fuego


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tbrey [ at ] awi-bremerhaven.de

Abstract

Growth, mortality and productivity of the hard clam E. exalbida from Ushuaia Bay, Beagle Channel were investigated. The parameters of the von Bertalanffy growth function were estimated to be H = 73.98 mm, K = 0.180 y 1, t0 = 0.147 y. Maximum individual production amounted to 2.742 g shell free wet mass (SFWM) at 49.5 mm shell height. Animals between 40 mm and 70 mm shell height contribute most to overall population somatic production P of 133.89 g SFWM m-2 y-1. Mean annual biomass B amounted to 1122.69 g SFWM m-2 y-1. Annual P/B ratio and mortality rate Z were estimated to 0.119 y-1 and 0.141 y-1, respectively. Slow growth and low turnover makes this population less suitable for sustainable commercial exploitation.



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ISI/Scopus peer-reviewed
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Eprint ID
5084
DOI 10.1016/s1385-1101(02)00134-X

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Lomovasky, B. , Brey, T. , Morriconi, E. and Calvo, J. (2002): Growth and production of the venerid bivalve Eurhomalea exalbida in the Beagle Channel, Tierra del Fuego , Journal of Sea Research, 48 , pp. 209-216 . doi: 10.1016/s1385-1101(02)00134-X


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