Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile
Sea lice (Caligus rogercresseyi) are external parasites that affect farmed salmonids in Chile, and the scale of their sanitary and economic impact cannot be overstated. Even though space-time patterns suppose parasite aggregation, specific locations related to different infestation levels, as well a...
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2024
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Online Access: | https://repositorio.uc.cl/handle/11534/78938 https://doi.org/10.3389/fvets.2021.595024 |
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ftpunivcchile:oai:repositorio.uc.cl:11534/78938 2024-06-23T07:51:26+00:00 Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile Lepe Lopez, Manuel Escobar Dodero, Joaquin Rubio, Daniel Alvarez, Julio Zimin Veselkoff, Natalia Mardones, Fernando O. 2024-01-10T13:44:48Z 14 páginas application/pdf https://repositorio.uc.cl/handle/11534/78938 https://doi.org/10.3389/fvets.2021.595024 en eng FRONTIERS MEDIA SA doi:10.3389/fvets.2021.595024 2297-1769 MEDLINE:34490385 https://doi.org/10.3389/fvets.2021.595024 https://repositorio.uc.cl/handle/11534/78938 WOS:000696467500001 acceso abierto sea lice Caligus rogercresseyi salmon farming host-density integrated pest management SEA LICE COPEPODA SALMO-SALAR L ATLANTIC SALMON BRAVO 2000 FARMED SALMONIDS LEPEOPHTHEIRUS-SALMONIS ONCORHYNCHUS-KISUTCH BOXSHALL CALIGIDAE INFESTATION 03 Good Health and Well-being 03 Salud y bienestar artículo 2024 ftpunivcchile https://doi.org/10.3389/fvets.2021.595024 2024-06-11T14:12:14Z Sea lice (Caligus rogercresseyi) are external parasites that affect farmed salmonids in Chile, and the scale of their sanitary and economic impact cannot be overstated. Even though space-time patterns suppose parasite aggregation, specific locations related to different infestation levels, as well as their associated factors across the geographic range involved, had not been investigated as of the writing of the present article. The understanding of the effects and factors entailed by the presence of C. rogercresseyi may be deemed a key element of Integrated Pest Management (IPM). In the present study, the multivariate spatial scan statistic was used to identify geographic areas and times of C. rogercresseyi infestation and to estimate the factors associated with such patterns. We used official C. rogercresseyi monitoring data at the farm level, with a set of 13 covariates, to provide adjustment within the analyses. The analyses were carried out for a period of 5 years (2012-2016), and they included three fish species (Salmo salar, Oncorhynchus mykiss, and Oncorhynchus kisutch) in order to assess the consistency of the identified clusters. A retrospective multinomial, spatial, and temporal scan test was implemented to identify farm clusters of either of the different categories of C. rogercresseyi infested farms: baseline, medium, and high, based on the control chemical threshold established by the health authority. The baseline represents adequate farm performance against C. rogercresseyi infestation. Then, production and environmental factors of the medium and high infestation farms were compared with the baseline using regression techniques. The results revealed a total of 26 clusters (p < 0.001), of which 12 correspond to baseline, 1 to medium, and the remaining 13 to high infestation clusters. In general, baseline clusters are detected in a latitudinal gradient on estuarine areas, with increasing relative risks to complex island water systems. There is a spatial structure in specific sites, north of Los ... Article in Journal/Newspaper Atlantic salmon Salmo salar Pontificia Universidad Católica de Chile: Repositorio UC Frontiers in Veterinary Science 8 |
institution |
Open Polar |
collection |
Pontificia Universidad Católica de Chile: Repositorio UC |
op_collection_id |
ftpunivcchile |
language |
English |
topic |
sea lice Caligus rogercresseyi salmon farming host-density integrated pest management SEA LICE COPEPODA SALMO-SALAR L ATLANTIC SALMON BRAVO 2000 FARMED SALMONIDS LEPEOPHTHEIRUS-SALMONIS ONCORHYNCHUS-KISUTCH BOXSHALL CALIGIDAE INFESTATION 03 Good Health and Well-being 03 Salud y bienestar |
spellingShingle |
sea lice Caligus rogercresseyi salmon farming host-density integrated pest management SEA LICE COPEPODA SALMO-SALAR L ATLANTIC SALMON BRAVO 2000 FARMED SALMONIDS LEPEOPHTHEIRUS-SALMONIS ONCORHYNCHUS-KISUTCH BOXSHALL CALIGIDAE INFESTATION 03 Good Health and Well-being 03 Salud y bienestar Lepe Lopez, Manuel Escobar Dodero, Joaquin Rubio, Daniel Alvarez, Julio Zimin Veselkoff, Natalia Mardones, Fernando O. Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
topic_facet |
sea lice Caligus rogercresseyi salmon farming host-density integrated pest management SEA LICE COPEPODA SALMO-SALAR L ATLANTIC SALMON BRAVO 2000 FARMED SALMONIDS LEPEOPHTHEIRUS-SALMONIS ONCORHYNCHUS-KISUTCH BOXSHALL CALIGIDAE INFESTATION 03 Good Health and Well-being 03 Salud y bienestar |
description |
Sea lice (Caligus rogercresseyi) are external parasites that affect farmed salmonids in Chile, and the scale of their sanitary and economic impact cannot be overstated. Even though space-time patterns suppose parasite aggregation, specific locations related to different infestation levels, as well as their associated factors across the geographic range involved, had not been investigated as of the writing of the present article. The understanding of the effects and factors entailed by the presence of C. rogercresseyi may be deemed a key element of Integrated Pest Management (IPM). In the present study, the multivariate spatial scan statistic was used to identify geographic areas and times of C. rogercresseyi infestation and to estimate the factors associated with such patterns. We used official C. rogercresseyi monitoring data at the farm level, with a set of 13 covariates, to provide adjustment within the analyses. The analyses were carried out for a period of 5 years (2012-2016), and they included three fish species (Salmo salar, Oncorhynchus mykiss, and Oncorhynchus kisutch) in order to assess the consistency of the identified clusters. A retrospective multinomial, spatial, and temporal scan test was implemented to identify farm clusters of either of the different categories of C. rogercresseyi infested farms: baseline, medium, and high, based on the control chemical threshold established by the health authority. The baseline represents adequate farm performance against C. rogercresseyi infestation. Then, production and environmental factors of the medium and high infestation farms were compared with the baseline using regression techniques. The results revealed a total of 26 clusters (p < 0.001), of which 12 correspond to baseline, 1 to medium, and the remaining 13 to high infestation clusters. In general, baseline clusters are detected in a latitudinal gradient on estuarine areas, with increasing relative risks to complex island water systems. There is a spatial structure in specific sites, north of Los ... |
format |
Article in Journal/Newspaper |
author |
Lepe Lopez, Manuel Escobar Dodero, Joaquin Rubio, Daniel Alvarez, Julio Zimin Veselkoff, Natalia Mardones, Fernando O. |
author_facet |
Lepe Lopez, Manuel Escobar Dodero, Joaquin Rubio, Daniel Alvarez, Julio Zimin Veselkoff, Natalia Mardones, Fernando O. |
author_sort |
Lepe Lopez, Manuel |
title |
Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
title_short |
Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
title_full |
Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
title_fullStr |
Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
title_full_unstemmed |
Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile |
title_sort |
epidemiological factors associated with caligus rogercresseyi infection, abundance, and spatial distribution in southern chile |
publisher |
FRONTIERS MEDIA SA |
publishDate |
2024 |
url |
https://repositorio.uc.cl/handle/11534/78938 https://doi.org/10.3389/fvets.2021.595024 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
doi:10.3389/fvets.2021.595024 2297-1769 MEDLINE:34490385 https://doi.org/10.3389/fvets.2021.595024 https://repositorio.uc.cl/handle/11534/78938 WOS:000696467500001 |
op_rights |
acceso abierto |
op_doi |
https://doi.org/10.3389/fvets.2021.595024 |
container_title |
Frontiers in Veterinary Science |
container_volume |
8 |
_version_ |
1802642534032211968 |