Lousy mums: patterns of vertical transmission of an amphibious louse
Abstract In this study, we document patterns of vertical transmission of the amphibious louse Antarctophthirus microchir (Echinophthiriidae) in pups of South American sea lion, Otaria flavescens, from Patagonia. Vertical transmission is fundamental for the long-term stability of A. microchir populat...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.658 http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1038.658 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1038.658 2023-05-15T13:34:24+02:00 Lousy mums: patterns of vertical transmission of an amphibious louse M S Leonardi E A Crespo J A Raga F J Aznar The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.658 http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.658 http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf text ftciteseerx 2020-03-08T01:19:21Z Abstract In this study, we document patterns of vertical transmission of the amphibious louse Antarctophthirus microchir (Echinophthiriidae) in pups of South American sea lion, Otaria flavescens, from Patagonia. Vertical transmission is fundamental for the long-term stability of A. microchir populations because only pups stay long enough (1 month) on land for the louse to reproduce. A total of 72 pups ≤7 days old from a single rookery were captured and examined for lice. Infection parameters and population structure of A. microchir did not differ among pups collected at the beginning, middle, and end of the reproductive season, suggesting that patterns of early vertical transmission are not affected by the increase of rookery size during this period. Over 60 % of 1-day-old pups were infected with A. microchir, and recruitment increased in pups up to 3 days old and then leveled off. In 1-day-old pups, significantly more adults than nymphs were found, but the pattern was reversed in older pups. The number of first-stage nymphs was significantly smaller than that of second-and third-stage nymphs, as it was the number of males vs. females, particularly in 1-day-old pups. Three non-exclusive hypotheses could account for these patterns, i.e., recruitment merely reflects the population structure of A. microchir is cows; the relative ability of lice to pass from cows onto pups increases in advanced instars; and/or natural selection favors transmission of adults, especially females, because they accrue greater fitness. The importance of latter hypothesis should not be underestimated in a species with a tight reproductive schedule. Text Antarc* Unknown Patagonia The Louse ENVELOPE(-56.415,-56.415,51.700,51.700) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract In this study, we document patterns of vertical transmission of the amphibious louse Antarctophthirus microchir (Echinophthiriidae) in pups of South American sea lion, Otaria flavescens, from Patagonia. Vertical transmission is fundamental for the long-term stability of A. microchir populations because only pups stay long enough (1 month) on land for the louse to reproduce. A total of 72 pups ≤7 days old from a single rookery were captured and examined for lice. Infection parameters and population structure of A. microchir did not differ among pups collected at the beginning, middle, and end of the reproductive season, suggesting that patterns of early vertical transmission are not affected by the increase of rookery size during this period. Over 60 % of 1-day-old pups were infected with A. microchir, and recruitment increased in pups up to 3 days old and then leveled off. In 1-day-old pups, significantly more adults than nymphs were found, but the pattern was reversed in older pups. The number of first-stage nymphs was significantly smaller than that of second-and third-stage nymphs, as it was the number of males vs. females, particularly in 1-day-old pups. Three non-exclusive hypotheses could account for these patterns, i.e., recruitment merely reflects the population structure of A. microchir is cows; the relative ability of lice to pass from cows onto pups increases in advanced instars; and/or natural selection favors transmission of adults, especially females, because they accrue greater fitness. The importance of latter hypothesis should not be underestimated in a species with a tight reproductive schedule. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
M S Leonardi E A Crespo J A Raga F J Aznar |
spellingShingle |
M S Leonardi E A Crespo J A Raga F J Aznar Lousy mums: patterns of vertical transmission of an amphibious louse |
author_facet |
M S Leonardi E A Crespo J A Raga F J Aznar |
author_sort |
M S Leonardi |
title |
Lousy mums: patterns of vertical transmission of an amphibious louse |
title_short |
Lousy mums: patterns of vertical transmission of an amphibious louse |
title_full |
Lousy mums: patterns of vertical transmission of an amphibious louse |
title_fullStr |
Lousy mums: patterns of vertical transmission of an amphibious louse |
title_full_unstemmed |
Lousy mums: patterns of vertical transmission of an amphibious louse |
title_sort |
lousy mums: patterns of vertical transmission of an amphibious louse |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.658 http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf |
long_lat |
ENVELOPE(-56.415,-56.415,51.700,51.700) |
geographic |
Patagonia The Louse |
geographic_facet |
Patagonia The Louse |
genre |
Antarc* |
genre_facet |
Antarc* |
op_source |
http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.658 http://phthiraptera.info/sites/phthiraptera.info/files/68779.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766052403106283520 |