http://www.sciencedirect.com/scienc...serid=10&md5=3347b03c90afd054d066a13bd1974137
doi:10.1016/j.aquaculture.2003.09.015
Copyright © 2004 Elsevier B.V. All rights reserved.
Metazoan parasites in wild fish and farmed salmon from aquaculture sites in southern Chile
Fabiola Sepúlvedaa, Sandra L. Marín, b, , and Juan Carvajala
a Centro de Investigación y Desarrollo de Recursos y Ambientes Costeros imar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
b Instituto de Acuicultura, Universidad Austral de Chile, Casilla 1327, Puerto Montt, Chile
Received 14 April 2003; Revised 21 August 2003; accepted 5 September 2003. Available online 30 October 2003.
Abstract
Parasitology of cultivated salmonids from southern Chile is currently focussed on the agents causing diseases, whereas little attention has been placed on the vector potential of native fish stocks surrounding aquaculture areas. This study describes the variation of both population and community descriptors for metazoan parasite fauna in seven species of wild native fish and in the farmed Atlantic salmon (Salmo salar) obtained from aquaculture sites in southern Chile. Fish were collected by standard methods, identified, measured and gutted for stomach content determination. Each parasite species was rated for prevalence and abundance, and parasite community richness was determined at the infracommunity and component level. Nine species of ectoparasites and 21 species of endoparasites were found in native fish. Although the diet of S. salar overlapped with that, of some native fish, they only harboured two parasite species. Richness of the component parasite community was higher than in other parts of Chile, and was generally related to host body size and diversity of habitat use. Results suggested that salmon farming affects distribution, feeding habits and ingested food items of native species, and may explain the higher species richness of the component community of native fish inhabiting areas surrounding salmon farms when compared to those of north and central Chile where salmon is absent. Native fish species may infect farmed salmonids with two ectoparasites and one endoparasite. However, the natural patterns of migration of some native fish species may enhance the increase of this number, or may cause outbreaks of parasitic species currently under control.
http://www.parasitologiamarina.cl/pdf/C2-Sepulveda et all 2004-Parasites in salmo.pdf
doi:10.1016/j.aquaculture.2003.09.015
Copyright © 2004 Elsevier B.V. All rights reserved.
Metazoan parasites in wild fish and farmed salmon from aquaculture sites in southern Chile
Fabiola Sepúlvedaa, Sandra L. Marín, b, , and Juan Carvajala
a Centro de Investigación y Desarrollo de Recursos y Ambientes Costeros imar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
b Instituto de Acuicultura, Universidad Austral de Chile, Casilla 1327, Puerto Montt, Chile
Received 14 April 2003; Revised 21 August 2003; accepted 5 September 2003. Available online 30 October 2003.
Abstract
Parasitology of cultivated salmonids from southern Chile is currently focussed on the agents causing diseases, whereas little attention has been placed on the vector potential of native fish stocks surrounding aquaculture areas. This study describes the variation of both population and community descriptors for metazoan parasite fauna in seven species of wild native fish and in the farmed Atlantic salmon (Salmo salar) obtained from aquaculture sites in southern Chile. Fish were collected by standard methods, identified, measured and gutted for stomach content determination. Each parasite species was rated for prevalence and abundance, and parasite community richness was determined at the infracommunity and component level. Nine species of ectoparasites and 21 species of endoparasites were found in native fish. Although the diet of S. salar overlapped with that, of some native fish, they only harboured two parasite species. Richness of the component parasite community was higher than in other parts of Chile, and was generally related to host body size and diversity of habitat use. Results suggested that salmon farming affects distribution, feeding habits and ingested food items of native species, and may explain the higher species richness of the component community of native fish inhabiting areas surrounding salmon farms when compared to those of north and central Chile where salmon is absent. Native fish species may infect farmed salmonids with two ectoparasites and one endoparasite. However, the natural patterns of migration of some native fish species may enhance the increase of this number, or may cause outbreaks of parasitic species currently under control.
http://www.parasitologiamarina.cl/pdf/C2-Sepulveda et all 2004-Parasites in salmo.pdf
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