Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus

The duration of 506 pregnancies in Antarctic fur seals (Arctocephalus gazelld) was measured 1983–1993. On average, pregnancy lasted 359 days, with a range of 340–390 days, representing 20% of the period of post-implantation fetal growth. Pregnancy was longest and birth dates latest in years associat...

Full description

Bibliographic Details
Published in:Journal of Mammalogy
Main Author: Boyd, I.L.
Format: Article in Journal/Newspaper
Language:unknown
Published: Oxford University Press 1996
Subjects:
Antarctic
Antarc*
Antarctic Fur Seals
Online Access:http://nora.nerc.ac.uk/id/eprint/514926/
https://doi.org/10.2307/1382714
id ftnerc:oai:nora.nerc.ac.uk:514926
record_format openpolar
spelling ftnerc:oai:nora.nerc.ac.uk:514926 2023-05-15T13:49:33+02:00 Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus Boyd, I.L. 1996-02 http://nora.nerc.ac.uk/id/eprint/514926/ https://doi.org/10.2307/1382714 unknown Oxford University Press Boyd, I.L. 1996 Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus. Journal of Mammalogy, 77 (1). 124-133. https://doi.org/10.2307/1382714 <https://doi.org/10.2307/1382714> Publication - Article PeerReviewed 1996 ftnerc https://doi.org/10.2307/1382714 2023-02-04T19:43:48Z The duration of 506 pregnancies in Antarctic fur seals (Arctocephalus gazelld) was measured 1983–1993. On average, pregnancy lasted 359 days, with a range of 340–390 days, representing 20% of the period of post-implantation fetal growth. Pregnancy was longest and birth dates latest in years associated with reduced availability of food. Sex of fetus and birth mass had no effect on the duration of pregnancy or date of birth. However, dates of parturition tended to be consistent within individuals. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Natural Environment Research Council: NERC Open Research Archive Antarctic Journal of Mammalogy 77 1 124 133
institution Open Polar
collection Natural Environment Research Council: NERC Open Research Archive
op_collection_id ftnerc
language unknown
description The duration of 506 pregnancies in Antarctic fur seals (Arctocephalus gazelld) was measured 1983–1993. On average, pregnancy lasted 359 days, with a range of 340–390 days, representing 20% of the period of post-implantation fetal growth. Pregnancy was longest and birth dates latest in years associated with reduced availability of food. Sex of fetus and birth mass had no effect on the duration of pregnancy or date of birth. However, dates of parturition tended to be consistent within individuals.
format Article in Journal/Newspaper
author Boyd, I.L.
spellingShingle Boyd, I.L.
Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
author_facet Boyd, I.L.
author_sort Boyd, I.L.
title Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
title_short Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
title_full Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
title_fullStr Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
title_full_unstemmed Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus
title_sort individual variation in the duration of pregnancy and birth date in antarctic fur seals: the role of environment, age, and sex of fetus
publisher Oxford University Press
publishDate 1996
url http://nora.nerc.ac.uk/id/eprint/514926/
https://doi.org/10.2307/1382714
geographic Antarctic
geographic_facet Antarctic
genre Antarc*
Antarctic
Antarctic Fur Seals
genre_facet Antarc*
Antarctic
Antarctic Fur Seals
op_relation Boyd, I.L. 1996 Individual variation in the duration of pregnancy and birth date in Antarctic fur seals: the role of environment, age, and sex of fetus. Journal of Mammalogy, 77 (1). 124-133. https://doi.org/10.2307/1382714 <https://doi.org/10.2307/1382714>
op_doi https://doi.org/10.2307/1382714
container_title Journal of Mammalogy
container_volume 77
container_issue 1
container_start_page 124
op_container_end_page 133
_version_ 1766251575365337088

Similar Items