Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake
Brook trout from a 5-ha lake near Schefferville, Quebec, were intensively sampled by small-mesh gill nets during 2 successive years to study patterns of helminth parasite occurrence in relation to changes in the age and size class structure of the fish population. Nearly 1800 brook trout were remove...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1991
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/z91-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/z91-101 |
id |
crcansciencepubl:10.1139/z91-101 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/z91-101 2023-12-17T10:50:47+01:00 Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake Albert, E. Curtis, M. A. 1991 http://dx.doi.org/10.1139/z91-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/z91-101 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 69, issue 3, page 691-697 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 1991 crcansciencepubl https://doi.org/10.1139/z91-101 2023-11-19T13:39:03Z Brook trout from a 5-ha lake near Schefferville, Quebec, were intensively sampled by small-mesh gill nets during 2 successive years to study patterns of helminth parasite occurrence in relation to changes in the age and size class structure of the fish population. Nearly 1800 brook trout were removed from the lake, of which all were measured and weighed, 568 were aged by otolith readings, and 361 were examined for parasites. The digeneans Crepidostomum farionis, Phyllodistomum umblae, and Diplostomum sp. and the cestode Eubothrium salvelini were present in more than 50% of the necropsied fish, and the prevalence and (or) abundance of all species except C. farionis increased from the first to the second year of the study. The fish catch in the first year was dominated by the 3+ year class and older fish, whereas by the second year 1+ and 2+ fish were proportionately more abundant, and the importance of older cohorts declined. This change in brook trout population structure, resulting from gill net selectivity, appears to have had the effect of improving per capita food availability for members of the residual stock. After the initial year of intensive fishing, the fish that remained fed more upon both benthic and planktonic invertebrates and their acquisition of parasites was intensified. Article in Journal/Newspaper Subarctic Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 69 3 691 697 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Albert, E. Curtis, M. A. Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Brook trout from a 5-ha lake near Schefferville, Quebec, were intensively sampled by small-mesh gill nets during 2 successive years to study patterns of helminth parasite occurrence in relation to changes in the age and size class structure of the fish population. Nearly 1800 brook trout were removed from the lake, of which all were measured and weighed, 568 were aged by otolith readings, and 361 were examined for parasites. The digeneans Crepidostomum farionis, Phyllodistomum umblae, and Diplostomum sp. and the cestode Eubothrium salvelini were present in more than 50% of the necropsied fish, and the prevalence and (or) abundance of all species except C. farionis increased from the first to the second year of the study. The fish catch in the first year was dominated by the 3+ year class and older fish, whereas by the second year 1+ and 2+ fish were proportionately more abundant, and the importance of older cohorts declined. This change in brook trout population structure, resulting from gill net selectivity, appears to have had the effect of improving per capita food availability for members of the residual stock. After the initial year of intensive fishing, the fish that remained fed more upon both benthic and planktonic invertebrates and their acquisition of parasites was intensified. |
format |
Article in Journal/Newspaper |
author |
Albert, E. Curtis, M. A. |
author_facet |
Albert, E. Curtis, M. A. |
author_sort |
Albert, E. |
title |
Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
title_short |
Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
title_full |
Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
title_fullStr |
Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
title_full_unstemmed |
Prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( Salvelinus fontinalis ) at a small subarctic lake |
title_sort |
prevalence and abundance of helminth parasites in an intensively fished population of brook trout ( salvelinus fontinalis ) at a small subarctic lake |
publisher |
Canadian Science Publishing |
publishDate |
1991 |
url |
http://dx.doi.org/10.1139/z91-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/z91-101 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Canadian Journal of Zoology volume 69, issue 3, page 691-697 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z91-101 |
container_title |
Canadian Journal of Zoology |
container_volume |
69 |
container_issue |
3 |
container_start_page |
691 |
op_container_end_page |
697 |
_version_ |
1785575860963639296 |