Collections de documents électroniques
RECHERCHER

Growth, Female Size, and Sex Ratio Variability in American Eel of Different Origins in Both Controlled Conditions and the Wild: Implications for Stocking Programs

Téléchargements

Téléchargements par mois depuis la dernière année

Plus de statistiques...

Côté, Caroline L. et Pavey, Scott A. et Stacey, Joshua A. et Pratt, Thomas C. et Castonguay, Martin et Audet, Céline et Bernatchez, Louis (2015). Growth, Female Size, and Sex Ratio Variability in American Eel of Different Origins in Both Controlled Conditions and the Wild: Implications for Stocking Programs. Transactions of the American Fisheries Society, 144 (2). p. 246-257.

[img]
Prévisualisation
PDF
Télécharger (847kB) | Prévisualisation

Résumé

Freshwater eels Anguilla spp. are declining worldwide, and a major challenge is understanding why these panmictic species show contrasting patterns of intraspecific phenotypic variation and recruitment. We present results on studies of the American Eel A. rostrata to understand and discriminate the effects of origin and plasticity on growth and sex determination. We considered two separate growth and one length‐at‐age data sets. The first growth data set originated from a 34‐month rearing experiment starting from the glass eel life stage to test the effects of origin, salinity, and density on growth and sex determination. The second growth data set originated from a shorter rearing experiment of 18 months starting at the yellow eel stage (around 3 years old) and compared transplanted individuals in Lake Ontario (LO) with natural migrants to the LO area. The third data set compared transplanted individuals in LO sampled by electrofishing with naturally migrating individuals. Sex ratios were identical for all origins and treatments in the long‐term growth experiment (34–35% females). While male size distribution had little variability, certain female groups had a large variation in growth and presented fast‐ and slow‐growing clusters. On the other hand, both cases of natural migrants to the LO area were consistent with being only slow‐growing females. We found that wild individuals rearing in the LO area were nearly exclusively transplanted individuals and that males, as well as fast‐growing females, were present. Even though the entire species is panmictic, these results support a role for spatially varying selection in explaining the phenotypic variation observed among regions and among individuals of the same region, and such factors must be considered for any successful management strategies of American Eel.

Type de document : Article
Validation par les pairs : Oui
Information complémentaire : Cette version de l’article est la version des auteur.es, révisée par les pairs, acceptée pour publication dans la revue Transactions of the American Fisheries Society. Caroline L. Côté, Scott A. Pavey, Joshua A. Stacey, Thomas C. Pratt, Martin Castonguay, Céline Audet & Louis Bernatchez (2015) Growth, Female Size, and Sex Ratio Variability in American Eel of Different Origins in Both Controlled Conditions and the Wild: Implications for Stocking Programs, Transactions of the American Fisheries Society, 144:2, 246-257, DOI: 10.1080/00028487.2014.975841 Elle est déposée sous les termes de la licence Creative Commons CC-BY-NC-ND (http://creativecommons.org/licenses/by-nc-nd/4.0/), qui permet la réutilisation non-commerciale, la distribution et la reproduction de l’article dans n’importe quel médium, à condition que l’œuvre originale soit correctement citée et qu’elle ne soit pas modifiée. This is an Accepted Manuscript version of the following article, accepted for publication in Transactions of the American Fisheries Society. Caroline L. Côté, Scott A. Pavey, Joshua A. Stacey, Thomas C. Pratt, Martin Castonguay, Céline Audet & Louis Bernatchez (2015) Growth, Female Size, and Sex Ratio Variability in American Eel of Different Origins in Both Controlled Conditions and the Wild: Implications for Stocking Programs, Transactions of the American Fisheries Society, 144:2, 246-257, DOI: 10.1080/00028487.2014.975841 It is deposited under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited, and is not altered, transformed, or built upon in any way.”
Version du document déposé : Post-print (version corrigée et acceptée)
Départements et unités départementales : Institut des sciences de la mer de Rimouski (ISMER)
Déposé par : DIUQAR UQAR
Date de dépôt : 11 janv. 2021 16:45
Dernière modification : 03 févr. 2021 20:30
URI : http://semaphore.uqar.ca/id/eprint/1742

Actions (Identification requise)

Dernière vérification avant le dépôt Dernière vérification avant le dépôt