DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA)
A bstract Southern elephant seals have been studied in depth in most of their breeding range. One notable exception is the Falkland Islands population. We present data on demography and breeding biology of elephant seals of Sea Lion Island, the main breeding site of this species in the Falklands. Se...
Published in: | Marine Mammal Science |
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Online Access: | http://dx.doi.org/10.1111/j.1748-7692.1999.tb00787.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1999.tb00787.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1999.tb00787.x |
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crwiley:10.1111/j.1748-7692.1999.tb00787.x 2024-10-06T13:48:20+00:00 DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) Galimberti, Filippo Boitani, Luigi 1999 http://dx.doi.org/10.1111/j.1748-7692.1999.tb00787.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1999.tb00787.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1999.tb00787.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 15, issue 1, page 159-178 ISSN 0824-0469 1748-7692 journal-article 1999 crwiley https://doi.org/10.1111/j.1748-7692.1999.tb00787.x 2024-09-11T04:14:36Z A bstract Southern elephant seals have been studied in depth in most of their breeding range. One notable exception is the Falkland Islands population. We present data on demography and breeding biology of elephant seals of Sea Lion Island, the main breeding site of this species in the Falklands. Sea Lion Island shelters a small, localized population of southern elephant seals (516 breeding females in 1995 and 518 in 1996). Comparison with the few available census data collected prior to our study suggests that the population has been stable in the short term (1989‐1996). Females produced pups at maximum rate and pup mortality was low (2.13%). Breeding sex ratio was strongly unbalanced, with about 14 females per breeding male and 47 females per harem‐holding male at peak haul‐out. Survival rate between breeding seasons was 67.4% for females and 50% for males. Timing of the breeding season was very similar to that recorded in other populations and was in accordance with clinal variation with latitude. Sex ratio at birth was balanced, and no significant weight dimorphism at weaning between sexes was detected (males: 135.4 kg; females: 132.0 kg). Weaning weight was correlated with size class of the mother. Article in Journal/Newspaper Elephant Seals Lion Island Mirounga leonina Southern Elephant Seals Wiley Online Library Lion Island ENVELOPE(-63.137,-63.137,-64.680,-64.680) Marine Mammal Science 15 1 159 178 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
A bstract Southern elephant seals have been studied in depth in most of their breeding range. One notable exception is the Falkland Islands population. We present data on demography and breeding biology of elephant seals of Sea Lion Island, the main breeding site of this species in the Falklands. Sea Lion Island shelters a small, localized population of southern elephant seals (516 breeding females in 1995 and 518 in 1996). Comparison with the few available census data collected prior to our study suggests that the population has been stable in the short term (1989‐1996). Females produced pups at maximum rate and pup mortality was low (2.13%). Breeding sex ratio was strongly unbalanced, with about 14 females per breeding male and 47 females per harem‐holding male at peak haul‐out. Survival rate between breeding seasons was 67.4% for females and 50% for males. Timing of the breeding season was very similar to that recorded in other populations and was in accordance with clinal variation with latitude. Sex ratio at birth was balanced, and no significant weight dimorphism at weaning between sexes was detected (males: 135.4 kg; females: 132.0 kg). Weaning weight was correlated with size class of the mother. |
format |
Article in Journal/Newspaper |
author |
Galimberti, Filippo Boitani, Luigi |
spellingShingle |
Galimberti, Filippo Boitani, Luigi DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
author_facet |
Galimberti, Filippo Boitani, Luigi |
author_sort |
Galimberti, Filippo |
title |
DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
title_short |
DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
title_full |
DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
title_fullStr |
DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
title_full_unstemmed |
DEMOGRAPHY AND BREEDING BIOLOGY OF A SMALL, LOCALIZED POPULATION OF SOUTHERN ELEPHANT SEALS ( MIROUNGA LEONINA) |
title_sort |
demography and breeding biology of a small, localized population of southern elephant seals ( mirounga leonina) |
publisher |
Wiley |
publishDate |
1999 |
url |
http://dx.doi.org/10.1111/j.1748-7692.1999.tb00787.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1999.tb00787.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1999.tb00787.x |
long_lat |
ENVELOPE(-63.137,-63.137,-64.680,-64.680) |
geographic |
Lion Island |
geographic_facet |
Lion Island |
genre |
Elephant Seals Lion Island Mirounga leonina Southern Elephant Seals |
genre_facet |
Elephant Seals Lion Island Mirounga leonina Southern Elephant Seals |
op_source |
Marine Mammal Science volume 15, issue 1, page 159-178 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.1999.tb00787.x |
container_title |
Marine Mammal Science |
container_volume |
15 |
container_issue |
1 |
container_start_page |
159 |
op_container_end_page |
178 |
_version_ |
1812176465272242176 |