Aging three-spined sticklebacks Gasterosteus aculeatus : comparison of estimates from three structures

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Yurtseva , A , Noreikiene , K , Lajus , D , Li , Z , Alapassi , T , Ivanova , T , Ivanov , M , Golovin , P , Vesala , S & Merilä , J 2019 , ' Aging three-spined sticklebacks Gasterosteus aculeatus : comparison of estimates from three structures ' , Journal of Fish Biology , vol. 95 , no. 3 , pp. 802-811 . https://doi.org/10.1111/jfb.14071

Title: Aging three-spined sticklebacks Gasterosteus aculeatus : comparison of estimates from three structures
Author: Yurtseva, Anastasia; Noreikiene, Kristina; Lajus, Dmitry; Li, Zitong; Alapassi, Tarja; Ivanova, Tatiana; Ivanov, Mikhail; Golovin, Pavel; Vesala, Sami; Merilä, Juha
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
University of Helsinki, Organismal and Evolutionary Biology Research Programme
Date: 2019-09
Language: eng
Number of pages: 10
Belongs to series: Journal of Fish Biology
ISSN: 0022-1112
URI: http://hdl.handle.net/10138/316133
Abstract: In order to assess the accuracy and reliability of age estimates from calcified structures in the three-spined stickleback Gasterosteus aculeatus, we evaluated intra and inter-reader repeatability from three structures: otoliths, gill covers and pelvic spines). Average age estimates were also compared between the structures. The overall intra-reader repeatability of age estimates were highest for otoliths (69%), lowest for gill covers (53%) and intermediate for spine cross-sections (63%). Although four of the seven readers had the highest intra-reader repeatability score for spine cross-sections, the inter-reader variance in this structure was much higher than in others. Otoliths were the easiest in terms of their pre-analysis treatment and exchange of materials (as digital images) between readers. In addition, otoliths are more well-studied compared with the other structures with respect to their development through ontogenesis; hence, age estimates based on otoliths should be the most reliable. Therefore, our recommendation is that whenever possible, analysis of otoliths should be the preferred approach for aging G. aculeatus.
Subject: age
Gasterosteus aculeatus
gill cover
otolith
pelvic spine
repeatability
DAILY GROWTH INCREMENTS
AGE-DETERMINATION
DORSAL SPINES
OTOLITHS
PRECISION
POPULATION
VALIDATION
EVOLUTION
SCALES
PRESERVATION
1181 Ecology, evolutionary biology
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