Growth and longevity of the endangered freshwater pearl mussel (Margaritifera margaritifera) : Implications for conservation and management
Nykänen, S., Taskinen, J., Hajisafarali, M., & Kuparinen, A. (2024). Growth and longevity of the endangered freshwater pearl mussel (Margaritifera margaritifera) : Implications for conservation and management. Aquatic Conservation : Marine and Freshwater Ecosystems, 34(6), Article e4205. https://doi.org/10.1002/aqc.4205
Julkaistu sarjassa
Aquatic Conservation : Marine and Freshwater EcosystemsPäivämäärä
2024Tekijänoikeudet
© 2024 the Authors
Key life-history data, such as growth and age, are necessary to effectively manage and conserve threatened freshwater mussel species. Traditionally growth and age studies require large yet destructive sample sizes covering all age classes. Such methods pose a risk to populations of conservation concern, and therefore, alternative methods that need only limited sample sizes are necessitated to prevent further threats to such populations. We applied retrospective shell growth at age reconstructions to 98 critically endangered freshwater pearl mussel (FPM) individuals from 34 populations across Finland and Sweden, enabling the use of extremely small sample sizes (n = 1–6 per population). We compared the performance of six different growth models with the reconstructed size-at-age data across FPM juvenile (<20 years old) and adult life stages. The growth reconstruction model showed reasonable skill in reconstructing FPM growth patterns. The von Bertalanffy model showed to be a good general descriptor of growth for FPM, but it systematically underestimated the asymptotic size. The power law model was the most accurate in estimating juvenile growth (lowest deviances from the size-at-age data). FPM showed great variability in longevity (Amax = 54–254 years) and growth constant k (0.018–0.057 year−1). Our results show that reasonable estimates of growth can be attained even when sample sizes are extremely limited. The results can be further applied to gain knowledge on the population's age structure, size at maturation, and recovery potential. The methodology is applicable to other freshwater mussel species of conservation concern.
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Julkaisija
WileyISSN Hae Julkaisufoorumista
1052-7613Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/220749211
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Rahoittaja(t)
Euroopan komissio; Lapin liitto; Suomalainen Konkordia-liitto ry; Ellen ja Artturi Nyyssösen säätiö; OLVI-säätiö srRahoitusohjelmat(t)
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The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Lisätietoja rahoituksesta
This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement no 770884; AK), the ENI Kolarctic Cross Border Collaboration (CBC) Programme (SALMUS project, KO1017; JT), the EU LIFE Programme (LIFE Revives project, LIFE20/NAT/FI/000611; JT), the Ellen and Artturi Nyyssönen Foundation (SN), the OLVI Foundation (SN), the Finnish Concordia Fund (SN), the Finnish Foundation for Nature Conservation (SN), and the Biological and Environmental Science Doctoral School of University of Jyväskylä (MH). ...Lisenssi
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