Early back-calculated size-at-age of Atlantic yellow eels sampled along ecological gradients in the Gironde and St. Lawrence hydrographical systems
| Autor: | Patrice Couture, Patrick Lambert, Magalie Baudrimont, Fabien Pierron, Géraldine Patey, Guy Verreault, Catherine M. Couillard, Hilaire Drouineau |
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| Přispěvatelé: | Institut National de la Recherche Scientifique [Québec] (INRS), Fisheries and Oceans Canada (DFO), Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Ministère des Forêts, de la Faune et des Parcs, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture, IRSTEA, Environnements et Paléoenvironnements OCéaniques (EPOC), Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Anguilla rostrata animal structures Aquatic Science 010603 evolutionary biology 01 natural sciences ECHANTILLONNAGE STATISTIQUE habitats ANGUILLA ROSTRATA population dynamics 14. Life underwater HABITAT Ecology Evolution Behavior and Systematics biodiversity biology 010604 marine biology & hydrobiology BIODIVERSITE Sampling (statistics) ANGUILLA ANGUILLA biology.organism_classification Fishery Geography Habitat [SDE]Environmental Sciences DYNAMIQUE DE POPULATION statistical sampling |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences Canadian Journal of Fisheries and Aquatic Sciences, NRC Research Press, 2018, 75 (8), pp.1270-1279. ⟨10.1139/cjfas-2017-0025⟩ |
| ISSN: | 0706-652X 1205-7533 |
| DOI: | 10.1139/cjfas-2017-0025⟩ |
| Popis: | An international sampling program investigating the causes of the decline of American eels (Anguilla rostrata) and European eels (Anguilla anguilla) in the St. Lawrence (Canada) and Gironde (France) rivers systems provided the opportunity to compare early growth of eels of each species among habitats using back-calculated size-at-age from 1 to 5 years old. Our study supports previous studies showing that the early back-calculated lengths of A. anguilla were higher in downstream and more saline Gironde system habitats than in the upstream fluvial section and provides a new indication that length at 1 year old is twice higher than that reported 10 years earlier. However, our data contradict the current paradigm for A. rostrata by providing evidence that early size-at-age of eels from the upstream St. Lawrence system, most distant from the spawning area, exceeds those of eels sampled downstream, at less distant sites in the estuarine section. Overall, these observations are consistent with the hypothesis that the observed spatial variations in early growth rate of yellow eels sampled in the St. Lawrence and Gironde systems are the consequence of processes occurring in the first year of age, such as genetic selection and (or) genetically dependent habitat choice. |
| Databáze: | OpenAIRE |
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