ArticleScientific reports2020
First Observation of a Spontaneously Matured Female European Eel (Anguilla anguilla).
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 11 citations in OpenAlex.
- Lipoprotein biology during induced oogenesis in the short-finned eel, Anguilla australis-hepatic target gene expression and accumulation of nutrient sources into developing oocytes.Fish physiology and biochemistry · 2026Article
- Histological Evidence of Multiple Spawning in Wild Female Japanese EelZoological studies · 2021Article
- Age of European silver eels during a period of declining abundance in Norway.Ecology and evolution · 2020Article
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Authors and funding
9 authors at 4 institutions in 3 countries.
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No grant is acknowledged in the PubMed record.
Abstract
This study reports on the first observation of a spontaneously matured female European eel. The 43-year-old eel, together with eleven other females, resided at an aquarium house since their capture in 2002 and stocking as glass eels in 1978. In June 2019, the girth of the belly of the female increased as a sign of oocyte maturation. The specimen had an estimated gonadosomatic index (GSI) of 47, only half of the oocytes were hydrated and matured, indicating that European eels are polycyclic batch spawners. The live eels of the cohort were still in the previtellogenic phase but their eye sizes were close to that of the matured eel. We hypothesize that substances released by other maturing and spawning fishes may have triggered puberty of the eel. This first observation, and the possibility of more eels maturing in the near future, provides a natural reference for the sexual maturation of the European eel.
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