Maternal effects on offspring growth rate and weaning mass in harbour seals
We studied maternal effects on offspring traits during lactation in harbour seals (Phoca vitulina) on Sable Island, Nova Scotia, from 1988 to 1996. Duration of lactation was correlated with rate of pup mass gain (r = %#150;0.34, n = 116) and weaning mass (r = 0.29, n = 154). Pups that grew faster ha...
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crcansciencepubl:10.1139/z01-075 2024-03-03T08:47:57+00:00 Maternal effects on offspring growth rate and weaning mass in harbour seals Bowen, W Don Ellis, Sara L Iverson, Sara J Boness, Daryl J 2001 http://dx.doi.org/10.1139/z01-075 http://www.nrcresearchpress.com/doi/pdf/10.1139/z01-075 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 79, issue 6, page 1088-1101 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2001 crcansciencepubl https://doi.org/10.1139/z01-075 2024-02-07T10:53:31Z We studied maternal effects on offspring traits during lactation in harbour seals (Phoca vitulina) on Sable Island, Nova Scotia, from 1988 to 1996. Duration of lactation was correlated with rate of pup mass gain (r = %#150;0.34, n = 116) and weaning mass (r = 0.29, n = 154). Pups that grew faster had shorter nursing periods, whereas those that attained higher weaning masses nursed for a greater number of days. Pup sex did not affect patterns of maternal effects. The pups of young females (4%#150;6 years old) gained mass at a constant but lower rate (0.56 kg/d) than the pups of older females through midlactation (0.74%#150;0.78 kg/d; n = 75). In older females, rates of pup mass gain decelerated between mid and late lactation. Although maternal age did not directly affect weaning mass of pups, path analysis showed that maternal age acted on weaning mass through intermediary traits. Lighter females gave birth to smaller and slower growing pups, but invested relatively more than heavier females (n = 153). Effects of maternal postpartum mass on weaning mass (n = 100) were weaker in harbour seals than in phocids that fast during lactation, but apparently stronger than in otariids that forage during lactation, suggesting that the strength of maternal effects is influenced by lactation strategy. Article in Journal/Newspaper Phoca vitulina Canadian Science Publishing Canadian Journal of Zoology 79 6 1088 1101 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Bowen, W Don Ellis, Sara L Iverson, Sara J Boness, Daryl J Maternal effects on offspring growth rate and weaning mass in harbour seals |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
We studied maternal effects on offspring traits during lactation in harbour seals (Phoca vitulina) on Sable Island, Nova Scotia, from 1988 to 1996. Duration of lactation was correlated with rate of pup mass gain (r = %#150;0.34, n = 116) and weaning mass (r = 0.29, n = 154). Pups that grew faster had shorter nursing periods, whereas those that attained higher weaning masses nursed for a greater number of days. Pup sex did not affect patterns of maternal effects. The pups of young females (4%#150;6 years old) gained mass at a constant but lower rate (0.56 kg/d) than the pups of older females through midlactation (0.74%#150;0.78 kg/d; n = 75). In older females, rates of pup mass gain decelerated between mid and late lactation. Although maternal age did not directly affect weaning mass of pups, path analysis showed that maternal age acted on weaning mass through intermediary traits. Lighter females gave birth to smaller and slower growing pups, but invested relatively more than heavier females (n = 153). Effects of maternal postpartum mass on weaning mass (n = 100) were weaker in harbour seals than in phocids that fast during lactation, but apparently stronger than in otariids that forage during lactation, suggesting that the strength of maternal effects is influenced by lactation strategy. |
format |
Article in Journal/Newspaper |
author |
Bowen, W Don Ellis, Sara L Iverson, Sara J Boness, Daryl J |
author_facet |
Bowen, W Don Ellis, Sara L Iverson, Sara J Boness, Daryl J |
author_sort |
Bowen, W Don |
title |
Maternal effects on offspring growth rate and weaning mass in harbour seals |
title_short |
Maternal effects on offspring growth rate and weaning mass in harbour seals |
title_full |
Maternal effects on offspring growth rate and weaning mass in harbour seals |
title_fullStr |
Maternal effects on offspring growth rate and weaning mass in harbour seals |
title_full_unstemmed |
Maternal effects on offspring growth rate and weaning mass in harbour seals |
title_sort |
maternal effects on offspring growth rate and weaning mass in harbour seals |
publisher |
Canadian Science Publishing |
publishDate |
2001 |
url |
http://dx.doi.org/10.1139/z01-075 http://www.nrcresearchpress.com/doi/pdf/10.1139/z01-075 |
genre |
Phoca vitulina |
genre_facet |
Phoca vitulina |
op_source |
Canadian Journal of Zoology volume 79, issue 6, page 1088-1101 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z01-075 |
container_title |
Canadian Journal of Zoology |
container_volume |
79 |
container_issue |
6 |
container_start_page |
1088 |
op_container_end_page |
1101 |
_version_ |
1792504270326595584 |