Why Carrying Capacity Models are Useful Tools for Management of Bivalve Molluscs Culture

  • Maurice Heral
Part of the Nato ASI Series book series (volume 33)


In areas where oyster or mussel culture is very intensive, declines of growth rate and decreases of survival rate have occurred. For these reasons, plans have been proposed to regulate the cultivated biomasses in order to fit the carrying capacity of the different ecosystems (Heral et al 1990; Heral, 1991). In areas where new aquaculture of molluscs is beginning, oyster or mussel farmers need to know how large the extension of the culture could be and what the maximal densities should be in order to obtain the maximum economic benefit. Furthermore, as mollusc cultures are developed in coastal areas, they are very susceptible to changes in environmental conditions that can modify trophic relationships, or directly reduce growth rate, physiological functions, recruitment and mortality processes. To give responses to these three types of questions concerning regulation, development, and environmental impact, it is necessary to build models. These models should predict responses in terms of bivalve growth rate in relation to the different management strategies, taking into account biomasses, new species and environmental modifications that can be planned. Two types of models have been developed to achieve these goals, (i) general models based on long term series of population dynamics of the cultivated species, and (ii) trophic models that describe the main relationships that govern the major fluxes of energy, carbon or nutrients in ecosystems.


Pacific Oyster Dynamic Population Model Mussel Culture Oyster Culture Oyster Production 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Maurice Heral
    • 1
  1. 1.Laboratoire de Biologie et d’Ecologie des Invertebres MarinsInstitut Francais de Recherche pour l’Exploitation de la MerLa TrembladeFrance

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