Variation in maternal provisioning by lactating Antarctic fur seals: 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...
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/variation-in-maternal-provisioning-by-lactating-antarctic-fur-seals-response-to-experimental-manipulation-in-pup-demand(d5a85e00-58b5-49d5-964b-926126c4bc13).html http://www.scopus.com/inward/record.url?scp=0034789060&partnerID=8YFLogxK |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/d5a85e00-58b5-49d5-964b-926126c4bc13 2024-06-23T07:47:57+00:00 Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand Arnould, JPY Boyd, Ian Lamont Rawlins, D Hindell, MA 2001-10 https://research-portal.st-andrews.ac.uk/en/researchoutput/variation-in-maternal-provisioning-by-lactating-antarctic-fur-seals-response-to-experimental-manipulation-in-pup-demand(d5a85e00-58b5-49d5-964b-926126c4bc13).html http://www.scopus.com/inward/record.url?scp=0034789060&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/variation-in-maternal-provisioning-by-lactating-antarctic-fur-seals-response-to-experimental-manipulation-in-pup-demand(d5a85e00-58b5-49d5-964b-926126c4bc13).html info:eu-repo/semantics/restrictedAccess Arnould , JPY , Boyd , I L , Rawlins , D & Hindell , MA 2001 , ' Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand ' , Behavioral Ecology and Sociobiology , vol. 50 , pp. 461-466 . Antarctic fur seal maternal investment feeding growth lactation GROWTH-RATE EFFICIENCY TIME WATER BIRD MASS FLUX article 2001 ftunstandrewcris 2024-06-13T00:03:34Z 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 University of St Andrews: Research Portal Antarctic |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Antarctic fur seal maternal investment feeding growth lactation GROWTH-RATE EFFICIENCY TIME WATER BIRD MASS FLUX |
spellingShingle |
Antarctic fur seal maternal investment feeding growth lactation GROWTH-RATE EFFICIENCY TIME WATER BIRD MASS FLUX Arnould, JPY Boyd, Ian Lamont Rawlins, D Hindell, MA Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
topic_facet |
Antarctic fur seal maternal investment feeding growth lactation GROWTH-RATE EFFICIENCY TIME WATER BIRD MASS FLUX |
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, Ian Lamont Rawlins, D Hindell, MA |
author_facet |
Arnould, JPY Boyd, Ian Lamont Rawlins, D Hindell, MA |
author_sort |
Arnould, JPY |
title |
Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
title_short |
Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
title_full |
Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
title_fullStr |
Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
title_full_unstemmed |
Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand |
title_sort |
variation in maternal provisioning by lactating antarctic fur seals: response to experimental manipulation in pup demand |
publishDate |
2001 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/variation-in-maternal-provisioning-by-lactating-antarctic-fur-seals-response-to-experimental-manipulation-in-pup-demand(d5a85e00-58b5-49d5-964b-926126c4bc13).html http://www.scopus.com/inward/record.url?scp=0034789060&partnerID=8YFLogxK |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals |
op_source |
Arnould , JPY , Boyd , I L , Rawlins , D & Hindell , MA 2001 , ' Variation in maternal provisioning by lactating Antarctic fur seals: response to experimental manipulation in pup demand ' , Behavioral Ecology and Sociobiology , vol. 50 , pp. 461-466 . |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/variation-in-maternal-provisioning-by-lactating-antarctic-fur-seals-response-to-experimental-manipulation-in-pup-demand(d5a85e00-58b5-49d5-964b-926126c4bc13).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1802638238799626240 |