Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic)
Feral house mice on sub-Antarctic Marion Island become reproductively active (males scrotal, females with perforate vaginas or pregnant) at an age > 60 days and breed until death, which may occur at more than 13 months. Breeding is strongly seasonal; pregnant or lactating females were found only...
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Online Access: | http://hdl.handle.net/10019.1/11640 https://doi.org/10.1007/s00300-003-0569-x |
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ftunstellenbosch:oai:scholar.sun.ac.za:10019.1/11640 2023-11-12T04:07:39+01:00 Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) Avenant N.L. Smith V.R. 2004 http://hdl.handle.net/10019.1/11640 https://doi.org/10.1007/s00300-003-0569-x unknown Polar Biology 27 2 7224060 doi:10.1007/s00300-003-0569-x http://hdl.handle.net/10019.1/11640 age structure climate population structure reproductive status rodent seasonality Indian Ocean Indian Ocean islands Marion Island Prince Edward Islands Mus musculus Rodentia Vertebrata Article 2004 ftunstellenbosch https://doi.org/10.1007/s00300-003-0569-x 2023-10-22T07:20:53Z Feral house mice on sub-Antarctic Marion Island become reproductively active (males scrotal, females with perforate vaginas or pregnant) at an age > 60 days and breed until death, which may occur at more than 13 months. Breeding is strongly seasonal; pregnant or lactating females were found only from October to May. A substantial proportion of mice old enough to breed in one summer overwinters to form a significant component of the breeding population the following summer but it is unlikely that any survive a second winter. The onset of breeding is closely synchronized with increasing day length but occurs about 2 months before mean temperature at the ground surface starts to increase significantly. Cessation of breeding is more closely associated with declining temperatures in late summer. For both males and females, the best correlation between reproductive activity and any of the temperature parameters measured was with average maximum temperature 1 cm above the ground. Competition for macroinvertebrate prey increases sharply in early winter due to high mouse numbers. The breeding season in 1991/1992 and 1992/ 1993 was at least 2 months longer than in 1979/1980, because the mice started breeding earlier, and stopped breeding later, in 1991/1993. The later cessation of breeding in 1991/1993 was despite the fact that there was a greater competition for macroinvertebrate prey, and that mean air temperatures during the early winter months were lower, than in 1979/1980. Article Article in Journal/Newspaper Antarc* Antarctic Marion Island Polar Biology Prince Edward Islands Stellenbosch University: SUNScholar Research Repository Antarctic Indian Polar Biology 27 2 99 111 |
institution |
Open Polar |
collection |
Stellenbosch University: SUNScholar Research Repository |
op_collection_id |
ftunstellenbosch |
language |
unknown |
topic |
age structure climate population structure reproductive status rodent seasonality Indian Ocean Indian Ocean islands Marion Island Prince Edward Islands Mus musculus Rodentia Vertebrata |
spellingShingle |
age structure climate population structure reproductive status rodent seasonality Indian Ocean Indian Ocean islands Marion Island Prince Edward Islands Mus musculus Rodentia Vertebrata Avenant N.L. Smith V.R. Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
topic_facet |
age structure climate population structure reproductive status rodent seasonality Indian Ocean Indian Ocean islands Marion Island Prince Edward Islands Mus musculus Rodentia Vertebrata |
description |
Feral house mice on sub-Antarctic Marion Island become reproductively active (males scrotal, females with perforate vaginas or pregnant) at an age > 60 days and breed until death, which may occur at more than 13 months. Breeding is strongly seasonal; pregnant or lactating females were found only from October to May. A substantial proportion of mice old enough to breed in one summer overwinters to form a significant component of the breeding population the following summer but it is unlikely that any survive a second winter. The onset of breeding is closely synchronized with increasing day length but occurs about 2 months before mean temperature at the ground surface starts to increase significantly. Cessation of breeding is more closely associated with declining temperatures in late summer. For both males and females, the best correlation between reproductive activity and any of the temperature parameters measured was with average maximum temperature 1 cm above the ground. Competition for macroinvertebrate prey increases sharply in early winter due to high mouse numbers. The breeding season in 1991/1992 and 1992/ 1993 was at least 2 months longer than in 1979/1980, because the mice started breeding earlier, and stopped breeding later, in 1991/1993. The later cessation of breeding in 1991/1993 was despite the fact that there was a greater competition for macroinvertebrate prey, and that mean air temperatures during the early winter months were lower, than in 1979/1980. Article |
format |
Article in Journal/Newspaper |
author |
Avenant N.L. Smith V.R. |
author_facet |
Avenant N.L. Smith V.R. |
author_sort |
Avenant N.L. |
title |
Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
title_short |
Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
title_full |
Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
title_fullStr |
Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
title_full_unstemmed |
Seasonal changes in age class structure and reproductive status of house mice on Marion Island (sub-Antarctic) |
title_sort |
seasonal changes in age class structure and reproductive status of house mice on marion island (sub-antarctic) |
publishDate |
2004 |
url |
http://hdl.handle.net/10019.1/11640 https://doi.org/10.1007/s00300-003-0569-x |
geographic |
Antarctic Indian |
geographic_facet |
Antarctic Indian |
genre |
Antarc* Antarctic Marion Island Polar Biology Prince Edward Islands |
genre_facet |
Antarc* Antarctic Marion Island Polar Biology Prince Edward Islands |
op_relation |
Polar Biology 27 2 7224060 doi:10.1007/s00300-003-0569-x http://hdl.handle.net/10019.1/11640 |
op_doi |
https://doi.org/10.1007/s00300-003-0569-x |
container_title |
Polar Biology |
container_volume |
27 |
container_issue |
2 |
container_start_page |
99 |
op_container_end_page |
111 |
_version_ |
1782328236013780992 |