Literature DB >> 30443940

Precision and accuracy of Dahl-Lea back-calculated smolt lengths from adult scales of Atlantic salmon Salmo salar.

Nora N Hanson1, Gordon W Smith1, Stuart J Middlemas1, Christopher D Todd2.   

Abstract

Using tagged and recaptured Atlantic salmon Salmo salar (n = 106) the present analysis shows that the most commonly applied linear back-calculation method for estimating past length, the Dahl-Lea method, resulted in overestimation of the length of large smolts and underestimation of small smolts. A correction equation (y = 0.53x + 6.23) for estimating true smolt length (y) from lengths back-calculated from adult scale measures (x) to account for these systematic discrepancies is proposed.
© 2018 Crown copyright. This article is published with the permission of the Controller of HMSO and the Queen's Printer for Scotland.

Entities:  

Keywords:  Salmo salar; allometry; back-calculation; circuli; growth; increment analysis

Mesh：

Year:  2018        PMID： 30443940     DOI： 10.1111/jfb.13863

Source DB:  PubMed          Journal:  J Fish Biol        ISSN： 0022-1112            Impact factor:   2.051


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