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Climate change and fish culture in Patagonia: present situation and perspectives

Authors

  • Víctor Humberto Báez,

    1. Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue – Consejo Nacional de Investigaciones Científicas y Técnicas, Río Negro, Argentina
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  • Juana del Carmen Aigo,

    1. Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue – Consejo Nacional de Investigaciones Científicas y Técnicas, Río Negro, Argentina
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  • Víctor Enrique Cussac

    1. Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue – Consejo Nacional de Investigaciones Científicas y Técnicas, Río Negro, Argentina
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Correspondence: V E Cussac, Instituto de Investigaciones en Biodiversidad y Medioambiente, Universidad Nacional del Comahue – Consejo Nacional de Investigaciones Científicas y Técnicas, Quintral 1250, Bariloche 8400, Río Negro, Argentina. E-mail: vcussac@conicet.gov.ar

Abstract

Temperature increment is one of the most visible aspects of climate change. Reservoirs in northern Patagonia are the main location for rainbow trout cage aquaculture activities in Argentina and here, surface water temperature shows an increment that despite leading towards better growth rates, also provokes lack of ovulation, atresia and a partial or total absence of spawning during the breeding season. During the early life history, low survival rates at hatching and first feeding are also observed. The increase in market size (>2 kg) has changed management practices, minimizing the difference between brood stock and individuals destined for consumption. Thus, the present situation differs deeply from carrying capacities forecasted few years ago and this analysis attempts to contribute to management policies including the idea of adaptation to climate change in the making of decisions.

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