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Changes in physiological parameters and feeding behaviour of Atlantic salmon Salmo salar infected with sea lice Lepeophtheirus salmonis.
Dawson, L H; Pike, A W; Houlihan, D F; McVicar, A H.
Afiliação
  • Dawson LH; Station Méditerranéene de l'Environnement Littoral, Université Montpellier II, Sète, France. ldawson@crit.univ-montp2.fr
Dis Aquat Organ ; 35(2): 89-99, 1999 Jan 29.
Article em En | MEDLINE | ID: mdl-10092971
Atlantic salmon Salmo salar L. artificially infected with salmon lice Lepeophtheirus salmonis (Krøyer 1837) recovered from detrimental physiological changes and skin damage induced by preadult lice as the parasites matured. Growth rates of Atlantic salmon remained unaffected by lice infection, but food consumption decreased with increasing feeding and movement of the lice prior to and post-mating, correlating with the appearance of head erosions and detrimental changes in physiological integrity. Food consumption of the fish increased as the lice moulted to the adult stage and gravid female lice settled in a posterior location on the fish, subsequently reducing the impact of infection and allowing recovery of the skin damage. However, the impact of preadults was limited, as the decrease in food consumption of fish at 21 d post-infection had no effect on either the specific growth rate or condition factor of the fish. Furthermore, the intensity of lice infections at each of the sample days was not correlated with food consumption, specific growth rate or any of the haematological or physiological parameters measured, either before or after infection, indicating that lice intensity was independent of social dominance/subordinance. This work has provided the first evidence that infected fish can recover from the detrimental changes caused by lice infection, even when they are still infected with lice. If fish can survive the preadult stage of lice, then the mortal impact of lice infections is greatly reduced.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmo salar / Ectoparasitoses / Comportamento Alimentar / Doenças dos Peixes Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Dis Aquat Organ Assunto da revista: BIOLOGIA / MEDICINA VETERINARIA / MICROBIOLOGIA Ano de publicação: 1999 Tipo de documento: Article País de afiliação: França
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Salmo salar / Ectoparasitoses / Comportamento Alimentar / Doenças dos Peixes Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: Dis Aquat Organ Assunto da revista: BIOLOGIA / MEDICINA VETERINARIA / MICROBIOLOGIA Ano de publicação: 1999 Tipo de documento: Article País de afiliação: França