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Population structure of European sprat (Sprattus sprattus) in the Greater North Sea ecoregion revealed by otolith shape analysis

Saltalamacchia, Francesco and Berg, Florian and Casini, Michele and Davies, Julie Coad and Bartolino, Valerio (2022). Population structure of European sprat (Sprattus sprattus) in the Greater North Sea ecoregion revealed by otolith shape analysis. Fisheries Research. 245 , 106131
[Research article]

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Abstract

A successful discrimination of fish populations is essential for sustainable management and assessment. Otolith shape analysis has been used on several species to reveal their population structure. Our aim was to use the otolith shape of European sprat (Sprattus sprattus) to investigate large- and small-scale geographical variability across the Greater North Sea ecoregion. The otolith shape was extracted from digitalised images and transformed into Wavelet coefficients to be analysed with multivariate statistics. Otolith shape was observed to follow the genetic population structure recently defined for the region, supporting the latest revision of the stock boundaries. Four main groups were identified based on phenotypic variability: (i) Norwegian fjords; (ii) North Sea and offshore Skagerrak-Kattegat; (iii) coastal Skagerrak-Kattegat; and (iv) Uddevalla fjord. However, 4-fold crossvalidations based on Linear Discriminant Analysis resulted in low accuracy limiting at the moment the ability to use otolith shape analysis for population identification at an operational basis. Our results show the importance of coastal areas, which might be inhabited by distinct populations of sprat that are currently not acknowledged in the management and assessment.

Authors/Creators:Saltalamacchia, Francesco and Berg, Florian and Casini, Michele and Davies, Julie Coad and Bartolino, Valerio
Title:Population structure of European sprat (Sprattus sprattus) in the Greater North Sea ecoregion revealed by otolith shape analysis
Series Name/Journal:Fisheries Research
Year of publishing :2022
Volume:245
Article number:106131
Number of Pages:7
Publisher:ELSEVIER
ISSN:0165-7836
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
Keywords:European sprat, North Sea, Otolith shape, Population structure, Wavelet
URN:NBN:urn:nbn:se:slu:epsilon-p-114132
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-114132
Additional ID:
Type of IDID
DOI10.1016/j.fishres.2021.106131
Web of Science (WoS)000705677800008
ID Code:25958
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:27 Oct 2021 06:25
Metadata Last Modified:27 Oct 2021 06:31

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