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The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales. / Daniel William Forman

Swansea University Author: Daniel William Forman

Abstract

"An intensive three year study on a wild population of moorhens (Gallinula chloropus) at the Wildfowl and Wetlands Trust Centre Llanelli, South Wales revealed that monogamy was the dominant breeding system. Significant numbers of individuals, however, bred annually in polyandrous, polygynous an...

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Published: 2001
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42564
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first_indexed 2018-08-02T18:55:00Z
last_indexed 2018-08-03T10:10:29Z
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spelling 2018-08-02T16:24:29.6809968 v2 42564 2018-08-02 The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales. f6ce82b88a585798cc8176215a4626e4 NULL Daniel William Forman Daniel William Forman true true 2018-08-02 "An intensive three year study on a wild population of moorhens (Gallinula chloropus) at the Wildfowl and Wetlands Trust Centre Llanelli, South Wales revealed that monogamy was the dominant breeding system. Significant numbers of individuals, however, bred annually in polyandrous, polygynous and polygynandrous groups. In contrast to communal groups formed by unrelated individuals and siblings, breeding groups formed by parents and offspring rarely persisted longer than one breeding season. Successful laying in multi-female groups only occurred when both females laid synchronously in the communal nest. The reproductive success of individuals in all communal groups over the duration of the study was generally lower than in monogamous pairings. Some females laid parasitically in the nests of neighbouring conspecifics in all years of the study. This intra-specific brood parasitism (IBP) appeared primarily restricted by host availability. Non-territory holding "floater" females laid a significant proportion of the annual number of IBP eggs. Territory holding IPB's laid parasitically before and after they had laid in their own nests with equal frequency. Host responses to IBP were limited by their ability to discriminate between their own eggs and those laid parasitically. As the success of IBP was generally poor, most hosts appeared in to incur little cost by being parasitised. Moorhen broods hatched over several days, creating distinctive size hierarchies based on chick age. To combat parental care monopolization, parents fed small chicks at greater rates per minute than large chicks. Large chicks were also tousled more frequently than smaller counterparts. Parents used tousling to enforced foraging independence on the entire brood. An investigation of parental behaviour using chick sex data derived from a genetic sexing technique revealed that female parental care was sex biased in several ways. In contrast, male parental care was uninfluenced by the chick's sex." E-Thesis Ecology.;Wildlife conservation. 31 12 2001 2001-12-31 COLLEGE NANME Biosciences COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:29.6809968 2018-08-02T16:24:29.6809968 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences Daniel William Forman NULL 1 0042564-02082018162504.pdf 10805313.pdf 2018-08-02T16:25:04.4230000 Output 7788389 application/pdf E-Thesis true 2018-08-02T16:25:04.4230000 false
title The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
spellingShingle The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
Daniel William Forman
title_short The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
title_full The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
title_fullStr The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
title_full_unstemmed The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
title_sort The breeding ecology of the moorhen, Gallinula chloropus, in an artificially created wetland environment at WWT Llanelli, South Wales.
author_id_str_mv f6ce82b88a585798cc8176215a4626e4
author_id_fullname_str_mv f6ce82b88a585798cc8176215a4626e4_***_Daniel William Forman
author Daniel William Forman
author2 Daniel William Forman
format E-Thesis
publishDate 2001
institution Swansea University
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 1
active_str 0
description "An intensive three year study on a wild population of moorhens (Gallinula chloropus) at the Wildfowl and Wetlands Trust Centre Llanelli, South Wales revealed that monogamy was the dominant breeding system. Significant numbers of individuals, however, bred annually in polyandrous, polygynous and polygynandrous groups. In contrast to communal groups formed by unrelated individuals and siblings, breeding groups formed by parents and offspring rarely persisted longer than one breeding season. Successful laying in multi-female groups only occurred when both females laid synchronously in the communal nest. The reproductive success of individuals in all communal groups over the duration of the study was generally lower than in monogamous pairings. Some females laid parasitically in the nests of neighbouring conspecifics in all years of the study. This intra-specific brood parasitism (IBP) appeared primarily restricted by host availability. Non-territory holding "floater" females laid a significant proportion of the annual number of IBP eggs. Territory holding IPB's laid parasitically before and after they had laid in their own nests with equal frequency. Host responses to IBP were limited by their ability to discriminate between their own eggs and those laid parasitically. As the success of IBP was generally poor, most hosts appeared in to incur little cost by being parasitised. Moorhen broods hatched over several days, creating distinctive size hierarchies based on chick age. To combat parental care monopolization, parents fed small chicks at greater rates per minute than large chicks. Large chicks were also tousled more frequently than smaller counterparts. Parents used tousling to enforced foraging independence on the entire brood. An investigation of parental behaviour using chick sex data derived from a genetic sexing technique revealed that female parental care was sex biased in several ways. In contrast, male parental care was uninfluenced by the chick's sex."
published_date 2001-12-31T03:53:13Z
_version_ 1763752639765413888
score 11.012678

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