Relative production of Atlantic salmon from fluvial and lacustrine habitats estimated from analyses of scale characteristics |
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Authors: | J B Dempson M F O'Connell M Shears |
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Institution: | Science Branch, Department of Fisheries and Oceans, P.O. Box 5667, St John's, Newfoundland A1C 5X1, Canada |
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Abstract: | Empirical and back-calculated growth of Atlantic salmon parr were compared between fish reared in fluvial and lacustrine habitats of Conne River, Newfoundland. Length at age was significantly higher for lacustrine parr. Various classification and maximum likelihood estimators indicated that 75% or more of the fish used lakes for rearing. Lacustrine use is another aspect of the inherent variability and plasticity of Atlantic salmon life-history traits. As most Newfoundland river systems include lakes, estimates of regional spawning targets and potential smolt production will need to take lake habitat into account. |
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Keywords: | Atlantic salmon Newfoundland lacustrine habitat scale analysis bootstrapping |
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