Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice
Exchange of diseases between domesticated and wild animals is a rising concern for conservation. In the ocean, many species display life histories that separate juveniles from adults. For pink salmon (Oncorhynchus gorbuscha) and parasitic sea lice (Lepeophtheirus salmonis), infection of juvenile sal...
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fttriple:oai:gotriple.eu:10670/1.givha1 2023-05-15T17:52:52+02:00 Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice Ashander, Jaime Lewis, Mark A. Krkošek, Martin 2012-01-01 https://doi.org/10.7939/R3SF2MK3R https://era.library.ualberta.ca/items/23617498-e46f-4242-b242-d614e32c7ecf en eng doi:10.7939/R3SF2MK3R 10670/1.givha1 https://era.library.ualberta.ca/items/23617498-e46f-4242-b242-d614e32c7ecf other ERA : Education and Research Archive envir archeo Other https://vocabularies.coar-repositories.org/resource_types/c_1843/ 2012 fttriple https://doi.org/10.7939/R3SF2MK3R 2023-01-22T18:25:10Z Exchange of diseases between domesticated and wild animals is a rising concern for conservation. In the ocean, many species display life histories that separate juveniles from adults. For pink salmon (Oncorhynchus gorbuscha) and parasitic sea lice (Lepeophtheirus salmonis), infection of juvenile salmon in early marine life occurs near salmon sea-cage aquaculture sites and is associated with declining abundance of wild salmon. Here, we develop a theoretical model for the pink salmon/sea lice host–parasite system and use it to explore the effects of aquaculture hosts, acting as reservoirs, on dynamics. Because pink salmon have a 2-year lifespan, even- and odd-year lineages breed in alternate years in a given river. These lineages can have consistently different relative abundances, a phenomenon termed “line dominance”. These dominance relationships between host lineages serve as a useful probe for the dynamical effects of introducing aquaculture hosts into this host–parasite system. We demonstrate how parasite spillover (farm-to-wild transfer) and spillback (wild-to-farm transfer) with aquaculture hosts can either increase or decrease the line dominance in an affected wild population. The direction of the effect depends on the response of farms to wild-origin infection. If aquaculture parasites are managed to a constant abundance, independent of the intensity of infections from wild to farm, then line dominance increases. On the other hand, if wild-origin parasites on aquaculture hosts are proportionally controlled to their abundance then line dominance decreases. Other/Unknown Material Oncorhynchus gorbuscha Pink salmon Unknown |
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envir archeo Ashander, Jaime Lewis, Mark A. Krkošek, Martin Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
topic_facet |
envir archeo |
description |
Exchange of diseases between domesticated and wild animals is a rising concern for conservation. In the ocean, many species display life histories that separate juveniles from adults. For pink salmon (Oncorhynchus gorbuscha) and parasitic sea lice (Lepeophtheirus salmonis), infection of juvenile salmon in early marine life occurs near salmon sea-cage aquaculture sites and is associated with declining abundance of wild salmon. Here, we develop a theoretical model for the pink salmon/sea lice host–parasite system and use it to explore the effects of aquaculture hosts, acting as reservoirs, on dynamics. Because pink salmon have a 2-year lifespan, even- and odd-year lineages breed in alternate years in a given river. These lineages can have consistently different relative abundances, a phenomenon termed “line dominance”. These dominance relationships between host lineages serve as a useful probe for the dynamical effects of introducing aquaculture hosts into this host–parasite system. We demonstrate how parasite spillover (farm-to-wild transfer) and spillback (wild-to-farm transfer) with aquaculture hosts can either increase or decrease the line dominance in an affected wild population. The direction of the effect depends on the response of farms to wild-origin infection. If aquaculture parasites are managed to a constant abundance, independent of the intensity of infections from wild to farm, then line dominance increases. On the other hand, if wild-origin parasites on aquaculture hosts are proportionally controlled to their abundance then line dominance decreases. |
format |
Other/Unknown Material |
author |
Ashander, Jaime Lewis, Mark A. Krkošek, Martin |
author_facet |
Ashander, Jaime Lewis, Mark A. Krkošek, Martin |
author_sort |
Ashander, Jaime |
title |
Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
title_short |
Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
title_full |
Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
title_fullStr |
Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
title_full_unstemmed |
Aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
title_sort |
aquaculture-induced changes to dynamics of a migratory host and specialist parasite: a case study of pink salmon and sea lice |
publishDate |
2012 |
url |
https://doi.org/10.7939/R3SF2MK3R https://era.library.ualberta.ca/items/23617498-e46f-4242-b242-d614e32c7ecf |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
ERA : Education and Research Archive |
op_relation |
doi:10.7939/R3SF2MK3R 10670/1.givha1 https://era.library.ualberta.ca/items/23617498-e46f-4242-b242-d614e32c7ecf |
op_rights |
other |
op_doi |
https://doi.org/10.7939/R3SF2MK3R |
_version_ |
1766160621221445632 |