Life History of American Eels from Western Newfoundland
Abstract Biological data are limited for American eels Anguilla rostrata from the northern portion of the species' geographic range. The biological characteristics of American eels from two sites in western Newfoundland varied by sex, maturation stage, and habitat. Female and male sexually matu...
Published in: | Transactions of the American Fisheries Society |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2009
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1577/t08-190.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T08-190.1 |
id |
crwiley:10.1577/t08-190.1 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1577/t08-190.1 2024-04-14T08:15:05+00:00 Life History of American Eels from Western Newfoundland Jessop, B. M. Shiao, J. C. Iizuka, Y. 2009 http://dx.doi.org/10.1577/t08-190.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T08-190.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 138, issue 4, page 861-871 ISSN 0002-8487 1548-8659 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2009 crwiley https://doi.org/10.1577/t08-190.1 2024-03-19T10:55:07Z Abstract Biological data are limited for American eels Anguilla rostrata from the northern portion of the species' geographic range. The biological characteristics of American eels from two sites in western Newfoundland varied by sex, maturation stage, and habitat. Female and male sexually mature (silver) eels from the Castors River were comparable in length range with eels reported from other Newfoundland sites. Female silver eels from the Castors River began their spawning migration at a lower developmental stage for the gonadosomatic index, eye index, and pectoral fin length index than did eels from more southerly sites in eastern Canada and the United States. Annual growth rate declined with increasing age ( r = −0.93, P < 0.001). The growth rate at a given age was higher for eels from Muddy Hole (an estuarine habitat at the mouth of Flat Bay Brook) than for those from the Castors River (a freshwater habitat) primarily because growth rate decreased with an increasing proportion of residence in freshwater ( r = −0.74, P < 0.001). Most eels (64‐72%) from both sites had a history of occasional migration between and residence of variable duration in both freshwater and saline water, as determined from otolith strontium: Calcium analysis. The mean growth rate of eels that had resided primarily in estuarine waters was 3.2 times greater than the growth of eels that had resided only in freshwater. Additional studies are required to clarify the life history and distributional relations of northern populations of American eels. Article in Journal/Newspaper Newfoundland Wiley Online Library Canada Muddy Hole ENVELOPE(-56.131,-56.131,50.883,50.883) Castors River ENVELOPE(-56.948,-56.948,50.917,50.917) Transactions of the American Fisheries Society 138 4 861 871 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Jessop, B. M. Shiao, J. C. Iizuka, Y. Life History of American Eels from Western Newfoundland |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Biological data are limited for American eels Anguilla rostrata from the northern portion of the species' geographic range. The biological characteristics of American eels from two sites in western Newfoundland varied by sex, maturation stage, and habitat. Female and male sexually mature (silver) eels from the Castors River were comparable in length range with eels reported from other Newfoundland sites. Female silver eels from the Castors River began their spawning migration at a lower developmental stage for the gonadosomatic index, eye index, and pectoral fin length index than did eels from more southerly sites in eastern Canada and the United States. Annual growth rate declined with increasing age ( r = −0.93, P < 0.001). The growth rate at a given age was higher for eels from Muddy Hole (an estuarine habitat at the mouth of Flat Bay Brook) than for those from the Castors River (a freshwater habitat) primarily because growth rate decreased with an increasing proportion of residence in freshwater ( r = −0.74, P < 0.001). Most eels (64‐72%) from both sites had a history of occasional migration between and residence of variable duration in both freshwater and saline water, as determined from otolith strontium: Calcium analysis. The mean growth rate of eels that had resided primarily in estuarine waters was 3.2 times greater than the growth of eels that had resided only in freshwater. Additional studies are required to clarify the life history and distributional relations of northern populations of American eels. |
format |
Article in Journal/Newspaper |
author |
Jessop, B. M. Shiao, J. C. Iizuka, Y. |
author_facet |
Jessop, B. M. Shiao, J. C. Iizuka, Y. |
author_sort |
Jessop, B. M. |
title |
Life History of American Eels from Western Newfoundland |
title_short |
Life History of American Eels from Western Newfoundland |
title_full |
Life History of American Eels from Western Newfoundland |
title_fullStr |
Life History of American Eels from Western Newfoundland |
title_full_unstemmed |
Life History of American Eels from Western Newfoundland |
title_sort |
life history of american eels from western newfoundland |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1577/t08-190.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T08-190.1 |
long_lat |
ENVELOPE(-56.131,-56.131,50.883,50.883) ENVELOPE(-56.948,-56.948,50.917,50.917) |
geographic |
Canada Muddy Hole Castors River |
geographic_facet |
Canada Muddy Hole Castors River |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Transactions of the American Fisheries Society volume 138, issue 4, page 861-871 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/t08-190.1 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
138 |
container_issue |
4 |
container_start_page |
861 |
op_container_end_page |
871 |
_version_ |
1796313343329304576 |