Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation
Abstract Mate limitation in dioecious parasite species has the potential to impact parasite population growth. Our focus of interest was the influence of parasite sex distribution among hosts on parasite reproduction and transmission dynamics for populations of ectoparasitic sea lice ( Lepeophtheiru...
Published in: | Ecosphere |
---|---|
Main Authors: | , , , , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2017
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/ecs2.2040 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.2040 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.2040 |
id |
crwiley:10.1002/ecs2.2040 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/ecs2.2040 2024-09-09T20:02:06+00:00 Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation Cox, R. Groner, M. L. Todd, C. D. Gettinby, G. Patanasatienkul, T. Revie, C. W. Canada Excellence Research Chairs, Government of Canada 2017 http://dx.doi.org/10.1002/ecs2.2040 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.2040 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.2040 en eng Wiley http://creativecommons.org/licenses/by/3.0/ Ecosphere volume 8, issue 12 ISSN 2150-8925 2150-8925 journal-article 2017 crwiley https://doi.org/10.1002/ecs2.2040 2024-07-02T04:13:55Z Abstract Mate limitation in dioecious parasite species has the potential to impact parasite population growth. Our focus of interest was the influence of parasite sex distribution among hosts on parasite reproduction and transmission dynamics for populations of ectoparasitic sea lice ( Lepeophtheirus salmonis Krøyer) establishing on wild juvenile salmon hosts. The data included more than 139,000 out‐migrating juvenile pink salmon ( Oncorhynchus gorbuscha (Walbaum)) and chum salmon ( Oncorhynchus keta (Walbaum)) in British Columbia, Canada, sampled over nine years. For almost all years, the sex ratio of the reproductive stages of the sea lice was female‐biased. The probability of a female being able to mate (i.e., of being attached to a fish also carrying a male louse) increased with increasing parasite abundance and parasite aggregation. We compared, with expected modeling predictions, the observed prevalence of pairs of sea lice (i.e., one reproductive louse of each sex) on a given fish and the observed probability of a female being able to mate. These comparisons showed that male and female sea lice tend to be distributed together rather than separately on hosts. Distribution together means that sea lice are distributed randomly on hosts according to a common negative binomial distribution, whereas distribution separately means that males are distributed according to a negative binomial and females are distributed in their own negative binomial among hosts. Despite the tendency for distribution together we found that, in every year, at least 30% of reproductive female sea lice experience mate limitation. This Allee effect will result in submaximal rates of parasite reproduction at low parasite abundances and may limit parasite transmission. The work has important implications for salmon parasite management and the health both of captive farm salmon populations and migratory wild stocks. More broadly, these results demonstrate the potential impact of mate limitation as a constraint to the establishment and ... Article in Journal/Newspaper Oncorhynchus gorbuscha Pink salmon Wiley Online Library British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Ecosphere 8 12 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Mate limitation in dioecious parasite species has the potential to impact parasite population growth. Our focus of interest was the influence of parasite sex distribution among hosts on parasite reproduction and transmission dynamics for populations of ectoparasitic sea lice ( Lepeophtheirus salmonis Krøyer) establishing on wild juvenile salmon hosts. The data included more than 139,000 out‐migrating juvenile pink salmon ( Oncorhynchus gorbuscha (Walbaum)) and chum salmon ( Oncorhynchus keta (Walbaum)) in British Columbia, Canada, sampled over nine years. For almost all years, the sex ratio of the reproductive stages of the sea lice was female‐biased. The probability of a female being able to mate (i.e., of being attached to a fish also carrying a male louse) increased with increasing parasite abundance and parasite aggregation. We compared, with expected modeling predictions, the observed prevalence of pairs of sea lice (i.e., one reproductive louse of each sex) on a given fish and the observed probability of a female being able to mate. These comparisons showed that male and female sea lice tend to be distributed together rather than separately on hosts. Distribution together means that sea lice are distributed randomly on hosts according to a common negative binomial distribution, whereas distribution separately means that males are distributed according to a negative binomial and females are distributed in their own negative binomial among hosts. Despite the tendency for distribution together we found that, in every year, at least 30% of reproductive female sea lice experience mate limitation. This Allee effect will result in submaximal rates of parasite reproduction at low parasite abundances and may limit parasite transmission. The work has important implications for salmon parasite management and the health both of captive farm salmon populations and migratory wild stocks. More broadly, these results demonstrate the potential impact of mate limitation as a constraint to the establishment and ... |
author2 |
Canada Excellence Research Chairs, Government of Canada |
format |
Article in Journal/Newspaper |
author |
Cox, R. Groner, M. L. Todd, C. D. Gettinby, G. Patanasatienkul, T. Revie, C. W. |
spellingShingle |
Cox, R. Groner, M. L. Todd, C. D. Gettinby, G. Patanasatienkul, T. Revie, C. W. Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
author_facet |
Cox, R. Groner, M. L. Todd, C. D. Gettinby, G. Patanasatienkul, T. Revie, C. W. |
author_sort |
Cox, R. |
title |
Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
title_short |
Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
title_full |
Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
title_fullStr |
Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
title_full_unstemmed |
Mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
title_sort |
mate limitation in sea lice infesting wild salmon hosts: the influence of parasite sex ratio and aggregation |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/ecs2.2040 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fecs2.2040 https://esajournals.onlinelibrary.wiley.com/doi/pdf/10.1002/ecs2.2040 |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) ENVELOPE(-19.455,-19.455,65.656,65.656) |
geographic |
British Columbia Canada Keta |
geographic_facet |
British Columbia Canada Keta |
genre |
Oncorhynchus gorbuscha Pink salmon |
genre_facet |
Oncorhynchus gorbuscha Pink salmon |
op_source |
Ecosphere volume 8, issue 12 ISSN 2150-8925 2150-8925 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
op_doi |
https://doi.org/10.1002/ecs2.2040 |
container_title |
Ecosphere |
container_volume |
8 |
container_issue |
12 |
_version_ |
1809934077440032768 |