Variation in the annual growth, by sex and migration history, of silver American eels Anguilla rostrata
Resource
Marine Ecology Progress Series, 272, 231-244
Journal
Marine Ecology Progress Series
Pages
231-244
Date Issued
2004-05
Date
2004-05
Author(s)
Abstract
Silver American eels Anguilla rostrata from the East River, Chester, on the Atlantic coast of Nova Scotia, as evaluated by the temporal pattern of Sr:Ca ratios in their otoliths, showed variable patterns of migration between river and estuarine/marine waters during their yellow eel stage. Eels with a history of primarily estuarine residence were longer (total length) at migration and had higher annual growth rates than did eels with a primarily freshwater residence. Female eels were longer at migration and had higher annual growth rates than did males. The percentage (64%) of silver eels with a history of estuarine residence and their larger size at age, size at migration, and higher growth rate relative to freshwater resident eels may result from higher productivity in oceanic than freshwaters at higher latitudes, as modified by regional environmental conditions. Environmental conditions change with increasing latitude in a different pattern for American and Japanese eels than for European eels.
Subjects
Anguilla rostrata
American eel
Otolith microchemistry
Strontium:calcium ratios
Migratory history
SDGs
Other Subjects
growth rate; migration; sexual dimorphism; Canada; Chester [Nova Scotia]; East River [Nova Scotia]; North America; Nova Scotia; Anguilla anguilla; Anguilla japonica; Anguilla rostrata; Anguilla rostrata; Anguilliformes; Vertebrata
Type
journal article
File(s)![Thumbnail Image]()
Loading...
Name
03.pdf
Size
324.28 KB
Format
Adobe PDF
Checksum
(MD5):8efeec8430c17d56ac80a68febbd5b00