996 resultados para EXTENSION AGRICOLA


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Barneko ikerkuntza-txostena

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From a special issue: A Brief History of the Charles Darwin Foundation for the Galapagos Islands 1959-1988

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The immunological response to handling stress of four tilapia species is evaluated. Polymorphism is examined in genes known to influence immune response in fish.

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The simple model relating food conversion efficiency (K sub(1)) to body weight derived from the theoretical concepts behind von Bertalanffy's growth model, is extended here in the context of Pauly's generalization of that model. The exponent, which was fixed to 1/3 in the simple model, is in the extended model equivalent to 1-d, with d being the weight exponent of the anabolism term in Pauly's growth model. This makes the model applicable to fish for which the assumptions of the original (special) version of von Bertalanffy's growth model are violated.