Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand
An experiment involving the supplementary feeding of pups was conducted on Antarctic fur seals to investigate the factors influencing maternal foraging-attendance cycles and the differential use of nutritional resources for growth, maintenance and storage by pups. For 40% of the lactation period, ma...
Published in: | Behavioral Ecology and Sociobiology |
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Online Access: | https://doi.org/10.1007/s002650100386 http://ecite.utas.edu.au/23547 |
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ftunivtasecite:oai:ecite.utas.edu.au:23547 2023-05-15T13:59:07+02:00 Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand Arnould, JPY Boyd, IL Rawlins, DR Hindell, MA 2001 https://doi.org/10.1007/s002650100386 http://ecite.utas.edu.au/23547 en eng Springer-Verlag http://dx.doi.org/10.1007/s002650100386 Arnould, JPY and Boyd, IL and Rawlins, DR and Hindell, MA, Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand, Behavioral Ecology and Sociobiology, 50, (5) pp. 461-466. ISSN 0340-5443 (2001) [Refereed Article] http://ecite.utas.edu.au/23547 Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.1007/s002650100386 2019-12-13T21:05:12Z An experiment involving the supplementary feeding of pups was conducted on Antarctic fur seals to investigate the factors influencing maternal foraging-attendance cycles and the differential use of nutritional resources for growth, maintenance and storage by pups. For 40% of the lactation period, male pups were given a supplement mimicking the chemical composition of Antarctic fur seal milk at a dose equivalent to 35% of the normal mass-specific milk energy intake for the species. Milk consumption, body composition and growth rates were monitored during and after the supplementary feeding period and maternal foraging-attendance cycles were monitored throughout lactation. During the supplementary feeding period, treatment pups (n=8) grew 32% faster and deposited greater adipose tissue stores than controls (n=8) but consumed the same amount of maternal-delivered milk. When supplementary feeding was stopped (timed to coincide with peak maternal milk yield in this species), treatment pups lost mass whereas control group pups continued to grow. Treatment pups weaned at a younger age (109 days) than control pups (116 days) but at the same mass (13 kg). Maternal attendance durations did not differ between the treatment and control groups throughout lactation. However, mothers of treatment pups had significantly shorter foraging trip durations (3.74 days) than mothers of control pups (4.74 days) during the period of supplementary feeding (there were no significant differences throughout the rest of lactation), These findings are in accordance with predictions of a marginal-value model of fur seal lactation behaviour. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella eCite UTAS (University of Tasmania) Antarctic Behavioral Ecology and Sociobiology 50 5 461 466 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
spellingShingle |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Arnould, JPY Boyd, IL Rawlins, DR Hindell, MA Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
topic_facet |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
description |
An experiment involving the supplementary feeding of pups was conducted on Antarctic fur seals to investigate the factors influencing maternal foraging-attendance cycles and the differential use of nutritional resources for growth, maintenance and storage by pups. For 40% of the lactation period, male pups were given a supplement mimicking the chemical composition of Antarctic fur seal milk at a dose equivalent to 35% of the normal mass-specific milk energy intake for the species. Milk consumption, body composition and growth rates were monitored during and after the supplementary feeding period and maternal foraging-attendance cycles were monitored throughout lactation. During the supplementary feeding period, treatment pups (n=8) grew 32% faster and deposited greater adipose tissue stores than controls (n=8) but consumed the same amount of maternal-delivered milk. When supplementary feeding was stopped (timed to coincide with peak maternal milk yield in this species), treatment pups lost mass whereas control group pups continued to grow. Treatment pups weaned at a younger age (109 days) than control pups (116 days) but at the same mass (13 kg). Maternal attendance durations did not differ between the treatment and control groups throughout lactation. However, mothers of treatment pups had significantly shorter foraging trip durations (3.74 days) than mothers of control pups (4.74 days) during the period of supplementary feeding (there were no significant differences throughout the rest of lactation), These findings are in accordance with predictions of a marginal-value model of fur seal lactation behaviour. |
format |
Article in Journal/Newspaper |
author |
Arnould, JPY Boyd, IL Rawlins, DR Hindell, MA |
author_facet |
Arnould, JPY Boyd, IL Rawlins, DR Hindell, MA |
author_sort |
Arnould, JPY |
title |
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
title_short |
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
title_full |
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
title_fullStr |
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
title_full_unstemmed |
Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand |
title_sort |
variation in maternal provisioning by lactating antarctic fur seals (arctocephalus gazella): response to experimental manipulation in pup demand |
publisher |
Springer-Verlag |
publishDate |
2001 |
url |
https://doi.org/10.1007/s002650100386 http://ecite.utas.edu.au/23547 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella |
op_relation |
http://dx.doi.org/10.1007/s002650100386 Arnould, JPY and Boyd, IL and Rawlins, DR and Hindell, MA, Variation in maternal provisioning by lactating Antarctic fur seals (Arctocephalus gazella): response to experimental manipulation in pup demand, Behavioral Ecology and Sociobiology, 50, (5) pp. 461-466. ISSN 0340-5443 (2001) [Refereed Article] http://ecite.utas.edu.au/23547 |
op_doi |
https://doi.org/10.1007/s002650100386 |
container_title |
Behavioral Ecology and Sociobiology |
container_volume |
50 |
container_issue |
5 |
container_start_page |
461 |
op_container_end_page |
466 |
_version_ |
1766267517524770816 |