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Too short to spawn?: Implications of small body size and swimming distance on successful migration and maturation of the European eel Anguilla anguilla
Stockholm University, Faculty of Science, Department of Systems Ecology.
2011 (English)In: Journal of Fish Biology, ISSN 0022-1112, E-ISSN 1095-8649, Vol. 78, no 4, 1073-1089 p.Article in journal (Refereed) Published
Abstract [en]

Individual net fat reserves after migration and reproductive investments were calculated for migrating female silver eels Anguilla anguilla (n = 387) collected in the outlet region of the Baltic Sea during the autumn run. It is estimated that 20 center dot 4% of the A. anguilla had completely exhausted all initial fat reserves and that 45 center dot 0% of A. anguilla were within 90% of complete energy depletion after migration and reproduction. This study concludes that a combination of body size and distance (6900 km) to the spawning area in the Sargasso Sea explains the results. An increase in the costs of migration due to heavy infection with Anguillicoloides crassus was also evaluated in an additional scenario with results showing that 26 center dot 4% of the A. anguilla had completely depleted all fat reserves. It is hypothesized that a large proportion of female silver A. anguilla from the Baltic Sea catchment area will have inadequate or suboptimal reserves for successful migration and reproduction.

Place, publisher, year, edition, pages
2011. Vol. 78, no 4, 1073-1089 p.
Keyword [en]
Anguillicoloides crassus, cost of transport, fat content, reproduction, spawning
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-68828DOI: 10.1111/j.1095-8649.2011.02920.xISI: 000289162100006OAI: oai:DiVA.org:su-68828DiVA: diva2:474082
Note
authorCount :4Available from: 2012-01-09 Created: 2012-01-07 Last updated: 2017-12-08Bibliographically approved

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