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The use of first vertebrae in separating, and estimating the size of, trout ( Salmo trutta ) and salmon ( Salmo salar ) in bone remains
Author(s) -
Feltham M. J.,
Marquiss M.
Publication year - 1989
Publication title -
journal of zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0952-8369
DOI - 10.1111/j.1469-7998.1989.tb02570.x
Subject(s) - salmo , biology , trout , juvenile , brown trout , fishery , fish <actinopterygii> , rainbow trout , vertebra , zoology , anatomy , ecology
A method is described in which a single bone, the first vertebra, is used to distinguish bone remains of juvenile salmon ( Salmo salar ) and trout ( Salmo trutta ) with 90% certainty. A single regression of salmon and trout first vertebra‐width versus fish‐length of fish predicted the latter with an accuracy of ±<10 mm (95% confidence limits) for salmonids of 45–150 mm fish‐length. First vertebrae were assigned to salmon or trout based on three visual characters with 89%,–90% certainty. Salmon are more variable than trout for the three characters. Of first vertebrae, 6.5% were not readily identifiable as either salmon or trout, and a further 3.0%) were misclassified using our criteria.