title: Regional variation in energy storage strategies in American glass eels from Eastern Canada.
abstract: Energy status was analyzed in glass eels captured during two early waves of arrival at the mouths of the Mersey River, Nova Scotia, Canada (MR), and Grande-Rivière-Blanche, Québec, Canada (GRB), and according to their salinity preference (freshwater, brackish, or saltwater). Glass eels captured in the GRB estuary were larger, more pigmented, and exhibited higher whole-body glycogen, phospholipid, and sterol and wax ester contents. Those from MR had a higher condition index and a higher whole-body triacylglycerol content, suggesting different patterns of storage and/or use of energy reserves. Within a river, a delay of two weeks in estuarine arrival was characterized by significantly lower energy reserves. No differences in energy storage were observed according to salinity preference. Thus, the results revealed the occurrence of different energy storage strategies according to glass eel migration distance and duration, but not according to salinity preference.
authors.affiliation: Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada.
authors.forename: Mélanie
authors.initials: M
authors.lastname: Gaillard
authors.affiliation: Institut de Biologie Intégrative et des Systèmes, Département de biologie, Université Laval, 1030 avenue de la Médecine, Québec, Québec G1V 0A6, Canada.
authors.forename: Louis
authors.initials: L
authors.lastname: Bernatchez
authors.affiliation: Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada.
authors.forename: Réjean
authors.initials: R
authors.lastname: Tremblay
authors.affiliation: Institut des Sciences de la Mer de Rimouski, Université du Québec à Rimouski, 310 Allée des Ursulines, Rimouski, QC G5L 3A1, Canada. Electronic address: celine_audet@uqar.ca.
authors.forename: Céline
authors.initials: C
authors.lastname: Audet
mesh_terms: D000811:Anguilla / Q000502:physiology*; D025041:Animal Migration / Q000502:physiology*; D000818:Animals; D002170:Canada; D017753:Ecosystem; D004734:Energy Metabolism / Q000502:physiology*; D063366:Estuaries; D005843:Geography; D006003:Glycogen / Q000378:metabolism; D016014:Linear Models; D010743:Phospholipids / Q000378:metabolism; D045483:Rivers; D054712:Salinity; D013261:Sterols / Q000378:metabolism; D013997:Time Factors; D014280:Triglycerides / Q000378:metabolism; D014481:United States; D014885:Waxes / Q000378:metabolism
chemical_list: D010743:Phospholipids; D013261:Sterols; D014280:Triglycerides; D014885:Waxes; D006003:Glycogen
keywords: American glass eels; Body lipid content; Ecotypes; Energy storage strategy; Upstream migration