Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal
Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Psychology Bibliography: leaves 87-109. The applicability of differential maternal investment and divergent behavioural ontogeny theories to a marginally dimorphic species, was investigated in the harbour seal. Weight changes of unweaned pup...
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ftmemorialunivdc:oai:collections.mun.ca:theses2/138440 2023-05-15T16:33:08+02:00 Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal Rosen, David A. S. (David Allen Scott), 1964- Memorial University of Newfoundland. Dept. of Psychology 1990 ix, 125 leaves : ill., maps. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/138440 Eng eng Electronic Theses and Dissertations (16.41 MB) -- http://collections.mun.ca/PDFs/theses/Rosen_DavidAllenScott.pdf 76083157 http://collections.mun.ca/cdm/ref/collection/theses2/id/138440 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Harbor seal--Behavior Parental behavior in animals Text Electronic thesis or dissertation 1990 ftmemorialunivdc 2015-08-06T19:16:52Z Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Psychology Bibliography: leaves 87-109. The applicability of differential maternal investment and divergent behavioural ontogeny theories to a marginally dimorphic species, was investigated in the harbour seal. Weight changes of unweaned pups on Miquelon were used to test whether mothers invested more in male than female offspring. Males ware found to be heavier at birth than females, but grew at a slower rate prior to weaning. Behavioural observations of mother/pup pairs were used to derive indicators of maternal investment. Nosing behaviour and two indices of nursing and proximity governance appeared to be reasonable predictors of relative investment. In contrast, nursing rejection rates and pup checks were not reasonable measures of investment while the validity of nursing times was inconclusive. The results suggested that, over the course of the nursing period, the pup was increasingly responsible for the level of investment obtained and the maintenance of the pair bond. Unweaned male pups were found to spend less time idle than females during haul outs, and all pups became increasingly more active over the nursing period. Sex difference in behaviour are discussed as an indicator of divergent socio-bioenergetic demands. Thesis harbor seal harbour seal Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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language |
English |
topic |
Harbor seal--Behavior Parental behavior in animals |
spellingShingle |
Harbor seal--Behavior Parental behavior in animals Rosen, David A. S. (David Allen Scott), 1964- Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
topic_facet |
Harbor seal--Behavior Parental behavior in animals |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Psychology Bibliography: leaves 87-109. The applicability of differential maternal investment and divergent behavioural ontogeny theories to a marginally dimorphic species, was investigated in the harbour seal. Weight changes of unweaned pups on Miquelon were used to test whether mothers invested more in male than female offspring. Males ware found to be heavier at birth than females, but grew at a slower rate prior to weaning. Behavioural observations of mother/pup pairs were used to derive indicators of maternal investment. Nosing behaviour and two indices of nursing and proximity governance appeared to be reasonable predictors of relative investment. In contrast, nursing rejection rates and pup checks were not reasonable measures of investment while the validity of nursing times was inconclusive. The results suggested that, over the course of the nursing period, the pup was increasingly responsible for the level of investment obtained and the maintenance of the pair bond. Unweaned male pups were found to spend less time idle than females during haul outs, and all pups became increasingly more active over the nursing period. Sex difference in behaviour are discussed as an indicator of divergent socio-bioenergetic demands. |
author2 |
Memorial University of Newfoundland. Dept. of Psychology |
format |
Thesis |
author |
Rosen, David A. S. (David Allen Scott), 1964- |
author_facet |
Rosen, David A. S. (David Allen Scott), 1964- |
author_sort |
Rosen, David A. S. (David Allen Scott), 1964- |
title |
Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
title_short |
Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
title_full |
Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
title_fullStr |
Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
title_full_unstemmed |
Maternal investment and the ontogeny of behaviour in the Atlantic harbour seal |
title_sort |
maternal investment and the ontogeny of behaviour in the atlantic harbour seal |
publishDate |
1990 |
url |
http://collections.mun.ca/cdm/ref/collection/theses2/id/138440 |
genre |
harbor seal harbour seal Newfoundland studies University of Newfoundland |
genre_facet |
harbor seal harbour seal Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (16.41 MB) -- http://collections.mun.ca/PDFs/theses/Rosen_DavidAllenScott.pdf 76083157 http://collections.mun.ca/cdm/ref/collection/theses2/id/138440 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
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1766022844092776448 |