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Conservation restoc...
Conservation restocking of the imperilled European eel does not necessarily equal conservation
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Rohtla, Mehis (author)
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Silm, Maidu (author)
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Tulonen, Jouni (author)
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Paiste, Päärn (author)
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- Wickström, Håkan (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för akvatiska resurser,Department of Aquatic Resources
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- Kielman-Schmitt, Melanie (author)
- Naturhistoriska riksmuseet,Enheten för geovetenskap
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- Kooijman, Ellen (author)
- Naturhistoriska riksmuseet,Enheten för geovetenskap
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Vaino, Väino (author)
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Eschbaum, Redik (author)
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Saks, Lauri (author)
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Verliin, Aare (author)
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Vetemaa, Markus (author)
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(creator_code:org_t)
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- 2020-12-08
- 2020
- English.
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In: ICES Journal of Marine Science. - : Oxford University Press (OUP). - 1054-3139 .- 1095-9289. ; , s. 1-11
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Subject headings
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- To stop the decline of the European eel population, one of the measures taken is translocating eels for restocking, despite its conservational value being largely unknown. We aimed to contribute to this knowledge gap by (i) investigating the origin of eels caught in coastal waters of Estonia and Finland using otolith microchemistry and (ii) directly estimating restocked eel escapement from Narva River Basin District (NRBD), which is part of the primary Eel Management Unit in Estonia. In Estonia, 74% of the sampled eels (n=140) were natural recruits and 26% were restocked. In Finland, 27% of the sampled eels (n=235) were natural recruits and 73% were restocked. Only 1% of all the coastally collected eels were originally restocked to NRBD. These new data together with the reported commercial landings from the escapement route conflict with the current silver eel escapement estimation for NRBD and question the accuracy and value of such indirect calculations compiled for most Eel Management Units throughout the European Union. It is concluded that restocking eels to freshwaters may be futile as a conservation measure in some situations, and better escapement is likely achieved in restocking eels to coastal waters or undammed freshwater systems with a direct connection to the sea.
Subject headings
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Fisk- och akvakulturforskning (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Fish and Aquacultural Science (hsv//eng)
Keyword
- Anguilla anguilla
- Eel Management Plan
- migration
- otolith microchemistry
- provenance
- Ecosystems and species history
- Ekosystem och arthistoria
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Rohtla, Mehis
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Silm, Maidu
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Tulonen, Jouni
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Paiste, Päärn
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Wickström, Håkan
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Kielman-Schmitt, ...
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show more...
-
Kooijman, Ellen
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Vaino, Väino
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Eschbaum, Redik
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Saks, Lauri
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Verliin, Aare
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Vetemaa, Markus
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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- AGRICULTURAL SCIENCES
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AGRICULTURAL SCI ...
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and Agriculture Fore ...
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and Fish and Aquacul ...
- Articles in the publication
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ICES Journal of ...
- By the university
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Swedish Museum of Natural History
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Swedish University of Agricultural Sciences