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...
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crfrontiers:10.3389/fvets.2021.595024 2024-02-11T10:08:20+01:00 Epidemiological Factors Associated With Caligus rogercresseyi Infection, Abundance, and Spatial Distribution in Southern Chile Lepe-López, Manuel Escobar-Dodero, Joaquín Rubio, Daniel Alvarez, Julio Zimin-Veselkoff, Natalia Mardones, Fernando O. 2021 http://dx.doi.org/10.3389/fvets.2021.595024 https://www.frontiersin.org/articles/10.3389/fvets.2021.595024/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Veterinary Science volume 8 ISSN 2297-1769 General Veterinary journal-article 2021 crfrontiers https://doi.org/10.3389/fvets.2021.595024 2024-01-26T10:07:43Z 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, ... Article in Journal/Newspaper Salmo salar Frontiers (Publisher) Frontiers in Veterinary Science 8 |
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General Veterinary |
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General Veterinary Lepe-López, Manuel Escobar-Dodero, Joaquín 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 |
General Veterinary |
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, ... |
format |
Article in Journal/Newspaper |
author |
Lepe-López, Manuel Escobar-Dodero, Joaquín Rubio, Daniel Alvarez, Julio Zimin-Veselkoff, Natalia Mardones, Fernando O. |
author_facet |
Lepe-López, Manuel Escobar-Dodero, Joaquín Rubio, Daniel Alvarez, Julio Zimin-Veselkoff, Natalia Mardones, Fernando O. |
author_sort |
Lepe-López, 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 |
2021 |
url |
http://dx.doi.org/10.3389/fvets.2021.595024 https://www.frontiersin.org/articles/10.3389/fvets.2021.595024/full |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
Frontiers in Veterinary Science volume 8 ISSN 2297-1769 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fvets.2021.595024 |
container_title |
Frontiers in Veterinary Science |
container_volume |
8 |
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1790607422074650624 |