Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago.
The risk of salmon lice (Lepeophtheirus salmonis) transmission to wild juvenile Pacific salmon has spurred management change to reduce lice on salmon farms. We studied the abundance of planktonic lice preceding the juvenile salmon outmigration as well as the abundance of lice on juvenile pink (Oncor...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1082.329 2023-05-15T17:52:52+02:00 Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. Alexandra Morton Rick Routledge Amy Mcconnell Martin Krkošek A Morton R Routledge A Mcconnell Krkošek M The Pennsylvania State University CiteSeerX Archives 2011 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1082.329 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1082.329 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://salmonfarmscience.files.wordpress.com/2012/02/sealice_2011_ices_morton.pdf text 2011 ftciteseerx 2020-05-03T00:26:40Z The risk of salmon lice (Lepeophtheirus salmonis) transmission to wild juvenile Pacific salmon has spurred management change to reduce lice on salmon farms. We studied the abundance of planktonic lice preceding the juvenile salmon outmigration as well as the abundance of lice on juvenile pink (Oncorhynchus gorbuscha) and chum (Oncorhynchus keta) salmon in two distinct migration routes, one containing only fallow farms and the other active farms that applied a parasiticide. Results indicate that fallowing reduces the abundance and flattens the spatial distribution of lice relative to that expected in areas without farms. Active farms remained the primary source of lice, but transmission was reduced 100-fold relative to previous epizootics in the study area. On the migration route containing active farms, 50% of the juvenile salmon showed evidence of louse damage to surface tissues and the estimated direct louse-induced mortality was ,10%, not including indirect effects of infection on predation risk or competition. The survival of the pink salmon cohort was not statistically different from a reference region without salmon farms. Although repeated use of a single parasiticide can lead to resistance, reducing louse transmission from farmed salmon may help conserve some wild Pacific salmon populations. Text Oncorhynchus gorbuscha Pink salmon Unknown Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Pacific |
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English |
description |
The risk of salmon lice (Lepeophtheirus salmonis) transmission to wild juvenile Pacific salmon has spurred management change to reduce lice on salmon farms. We studied the abundance of planktonic lice preceding the juvenile salmon outmigration as well as the abundance of lice on juvenile pink (Oncorhynchus gorbuscha) and chum (Oncorhynchus keta) salmon in two distinct migration routes, one containing only fallow farms and the other active farms that applied a parasiticide. Results indicate that fallowing reduces the abundance and flattens the spatial distribution of lice relative to that expected in areas without farms. Active farms remained the primary source of lice, but transmission was reduced 100-fold relative to previous epizootics in the study area. On the migration route containing active farms, 50% of the juvenile salmon showed evidence of louse damage to surface tissues and the estimated direct louse-induced mortality was ,10%, not including indirect effects of infection on predation risk or competition. The survival of the pink salmon cohort was not statistically different from a reference region without salmon farms. Although repeated use of a single parasiticide can lead to resistance, reducing louse transmission from farmed salmon may help conserve some wild Pacific salmon populations. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Alexandra Morton Rick Routledge Amy Mcconnell Martin Krkošek A Morton R Routledge A Mcconnell Krkošek M |
spellingShingle |
Alexandra Morton Rick Routledge Amy Mcconnell Martin Krkošek A Morton R Routledge A Mcconnell Krkošek M Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
author_facet |
Alexandra Morton Rick Routledge Amy Mcconnell Martin Krkošek A Morton R Routledge A Mcconnell Krkošek M |
author_sort |
Alexandra Morton |
title |
Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
title_short |
Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
title_full |
Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
title_fullStr |
Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
title_full_unstemmed |
Sea lice dispersion and salmon survival in relation to salmon farm activity in the Broughton Archipelago. |
title_sort |
sea lice dispersion and salmon survival in relation to salmon farm activity in the broughton archipelago. |
publishDate |
2011 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1082.329 |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
Keta Pacific |
geographic_facet |
Keta Pacific |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
https://salmonfarmscience.files.wordpress.com/2012/02/sealice_2011_ices_morton.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1082.329 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766160597396750336 |