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Relationship between standard metabolic rate and parasite‐induced cataract of juveniles in three Atlantic salmon stocks
Author(s) -
Seppänen E.,
Kuukka H.,
Huuskonen H.,
Piironen J.
Publication year - 2008
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2008.01832.x
Subject(s) - biology , salmo , parasite hosting , population , raceway , zoology , fishery , fish <actinopterygii> , physics , demography , finite element method , sociology , world wide web , computer science , thermodynamics
The connection between standard metabolic rate ( R S ) and parasite‐induced cataract was investigated in this study. Oxygen consumption rate and cataract of 1 year‐old fish in three Atlantic salmon Salmo salar stocks: Lake Saimaa, River Neva and River Teno reared at the same fish farm were examined. The measurements were carried out in winter, in spring before transporting the fish to the outside raceways and in autumn after the raceway period. Fish were exposed to natural Diplostomum spp. infection especially during the raceway period. The prevalence of cataract‐bearing fish and cataract intensities ( I C ) differed between the populations. Most cataract‐bearing individuals were found in the Saimaa stock and, in addition, the Saimaa stock had higher I C than Neva and Teno stocks. These findings support the theory of a parasite being most infective to local population. The R S , however, differed also between the stocks, the Teno stock had higher values compared to the Neva stock in winter. Furthermore, R S and cataract intensity had a statistically significant positive correlation in autumn. Therefore, the results also reveal a possibility that parasite infection affects R S of the fish.