Precision and accuracy of Dahl-Lea back-calculated smolt lengths from adult scales of Atlantic salmon (Salmo salar L.)
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.
Citation
Hanson , N N , Smith , G W , Middlemas , S J & Todd , C D 2019 , ' Precision and accuracy of Dahl-Lea back-calculated smolt lengths from adult scales of Atlantic salmon ( Salmo salar L. ) ' , Journal of Fish Biology , vol. 94 , no. 1 , pp. 183-186 . https://doi.org/10.1111/jfb.13863
Publication
Journal of Fish Biology
Status
Peer reviewed
ISSN
0022-1112Type
Journal article
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