Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus )
From 1980 to 1985, we investigated a lacustrine population of threespine stickleback (Gasterosteus aculeatus) with respect to densities, individual length, distribution, diet, frequency of parasitism by Schistocepbalus solidus, and selective predation by Atlantic salmon (Salmo salar). From these inv...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1988
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Online Access: | http://dx.doi.org/10.1139/f88-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-051 |
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crcansciencepubl:10.1139/f88-051 2024-04-07T07:51:09+00:00 Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) Jakobsen, Per Johan Johnsen, Geir Helge Larsson, Petter 1988 http://dx.doi.org/10.1139/f88-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-051 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 3, page 426-431 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crcansciencepubl https://doi.org/10.1139/f88-051 2024-03-08T00:37:50Z From 1980 to 1985, we investigated a lacustrine population of threespine stickleback (Gasterosteus aculeatus) with respect to densities, individual length, distribution, diet, frequency of parasitism by Schistocepbalus solidus, and selective predation by Atlantic salmon (Salmo salar). From these investigations we concluded the following. (1) When stickleback are forced into the littoral zone by salmon, competition in this restricted area increases, or alternatively, stickleback distribute themselves in an area with less profitable prey. This, combined with predation from salmon, results in a population decline and reduced growth of the stickleback. (2) At least in autumn, parasitized stickleback distribute themselves in areas with high predation risk from salmon; when exposed to salmon predation, parasitized stickleback are preyed upon at a higher rate than healthy ones. Hence, parasitized individuals have almost disappeared from the stickleback population in Lake Kvernavann, Norway. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Norway Canadian Journal of Fisheries and Aquatic Sciences 45 3 426 431 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Jakobsen, Per Johan Johnsen, Geir Helge Larsson, Petter Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
From 1980 to 1985, we investigated a lacustrine population of threespine stickleback (Gasterosteus aculeatus) with respect to densities, individual length, distribution, diet, frequency of parasitism by Schistocepbalus solidus, and selective predation by Atlantic salmon (Salmo salar). From these investigations we concluded the following. (1) When stickleback are forced into the littoral zone by salmon, competition in this restricted area increases, or alternatively, stickleback distribute themselves in an area with less profitable prey. This, combined with predation from salmon, results in a population decline and reduced growth of the stickleback. (2) At least in autumn, parasitized stickleback distribute themselves in areas with high predation risk from salmon; when exposed to salmon predation, parasitized stickleback are preyed upon at a higher rate than healthy ones. Hence, parasitized individuals have almost disappeared from the stickleback population in Lake Kvernavann, Norway. |
format |
Article in Journal/Newspaper |
author |
Jakobsen, Per Johan Johnsen, Geir Helge Larsson, Petter |
author_facet |
Jakobsen, Per Johan Johnsen, Geir Helge Larsson, Petter |
author_sort |
Jakobsen, Per Johan |
title |
Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
title_short |
Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
title_full |
Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
title_fullStr |
Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
title_full_unstemmed |
Effects of Predation Risk and Parasitism on the Feeding Ecology, Habitat Use, and Abondance of Lacustrine Threespine Stickleback ( Gasterosteus aculeatus ) |
title_sort |
effects of predation risk and parasitism on the feeding ecology, habitat use, and abondance of lacustrine threespine stickleback ( gasterosteus aculeatus ) |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/f88-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/f88-051 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 45, issue 3, page 426-431 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f88-051 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
45 |
container_issue |
3 |
container_start_page |
426 |
op_container_end_page |
431 |
_version_ |
1795666025547563008 |