Le potentiel de croissance a un effet sur le déclenchement de la mâturité chez un poisson semelpare
| Autor: | Katsumi Tsukamoto, Michael J. Miller, W. Russell Poole, Nobuto Fukuda, Françoise Daverat, Ryusuke Sudo, Kazuki Yokouchi, Pierre Elie |
|---|---|
| Přispěvatelé: | Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
endocrine system Zoology Fresh Water Biology Affect (psychology) 010603 evolutionary biology 01 natural sciences [SDV.BA.ZV]Life Sciences [q-bio]/Animal biology/Vertebrate Zoology medicine population dynamics Animals Body Size 14. Life underwater Sexual Maturation statoliths Semelparity and iteroparity Ecosystem Otolith Maturity (geology) Fish migration maturation 010604 marine biology & hydrobiology OTOLITHE ANGUILLA ANGUILLA Anguilla Agricultural and Biological Sciences (miscellaneous) Europe medicine.anatomical_structure Fish DYNAMIQUE DE POPULATION Animal Migration Female Population Ecology [SDE.BE]Environmental Sciences/Biodiversity and Ecology General Agricultural and Biological Sciences |
| Zdroj: | Biology Letters Biology Letters, Royal Society, The, 2018, 14 (7), ⟨10.1098/rsbl.2018.0269⟩ Biology Letters, Royal Society, The, 2018, 14 (7), pp.4. ⟨10.1098/rsbl.2018.0269⟩ |
| ISSN: | 1744-9561 |
| DOI: | 10.1098/rsbl.2018.0269⟩ |
| Popis: | Many diadromous fishes such as salmon and eels that move between freshwater and the ocean have evolved semelparous reproductive strategies, but both groups display considerable plasticity in characteristics. Factors such as population density and growth, predation risk or reproduction cost have been found to influence timing of maturation. We investigated the relationship between female size at maturity and individual growth trajectories of the long-lived semelparous European eel, Anguilla anguilla . A Bayesian model was applied to 338 individual growth trajectories of maturing migration-stage female silver eels from France, Ireland, the Netherlands and Hungary. The results clearly showed that when growth rates declined, the onset of maturation was triggered, and the eels left their growth habitats and migrated to the spawning area. Therefore, female eels tended to attain larger body size when the growth conditions were good enough to risk spending extra time in their growth habitats. This flexible maturation strategy is likely related to the ability to use diverse habitats with widely ranging growth and survival potentials in the catadromous life-history across its wide species range. |
| Databáze: | OpenAIRE |
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