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

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Hanson_et_al_2018_Journal_of_Fish_Biology_AAM.pdf (1.423Mb)
Date
29/01/2019
Author
Hanson, Nora N
Smith, Gordon W
Middlemas, Stewart J
Todd, Christopher David
Keywords
Allometry
Back-calculation
Circuli
Growth
Increment analysis
Salmo salar
QH301 Biology
SH Aquaculture. Fisheries. Angling
NDAS
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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
DOI
https://doi.org/10.1111/jfb.13863
ISSN
0022-1112
Type
Journal article
Rights
Copyright © 2018, Crown copyright. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1111/jfb.13863
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/18930

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