Distribution patterns and sexual segregation in chimaeras: implications for conservation and management
Chimaeras such as Chimaera monstrosa and Hydrolagus mirabilis are commonly found in commercial bycatch of deep-sea fisheries in the Northeast Atlantic. Very little information exists on their life history, ecology or behaviour. Segregation of populations by sex and/or age classes has been demonstrat...
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Language: | English |
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Oxford University Press
2013
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Online Access: | http://hdl.handle.net/10072/173257 https://doi.org/10.1093/icesjms/fst058 |
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/173257 2024-06-23T07:55:27+00:00 Distribution patterns and sexual segregation in chimaeras: implications for conservation and management Holt, Rebecca E. Foggo, Andrew Neat, Francis C. Howell, Kerry L. 2013 http://hdl.handle.net/10072/173257 https://doi.org/10.1093/icesjms/fst058 English eng eng Oxford University Press ICES Journal of Marine Science http://hdl.handle.net/10072/173257 1095-9289 doi:10.1093/icesjms/fst058 Ecology not elsewhere classified Journal article 2013 ftgriffithuniv https://doi.org/10.1093/icesjms/fst058 2024-06-12T00:16:12Z Chimaeras such as Chimaera monstrosa and Hydrolagus mirabilis are commonly found in commercial bycatch of deep-sea fisheries in the Northeast Atlantic. Very little information exists on their life history, ecology or behaviour. Segregation of populations by sex and/or age classes has been demonstrated in several elasmobranchs, but whether segregation occurs in chimaeras, and if so what mechanisms are involved, remains unknown. This study investigates the distribution and sexual segregation of four species of chimaera (C. monstrosa, H. mirabilis, C. opalescens n. sp. and Harriotta raleighana) in relation to sex, size (maturity) class, bottom depth, and latitude. Data were obtained from annual trawl surveys undertaken by Marine Scotland, Aberdeen, from 1998–2009, at 400–2000 m in the Northeast Atlantic (55–59°N 5–11°W). A factorial General Linear Model (GLM) with planned contrasts indicated complex patterns of age- and sex-related segregation. All adult males and females were sexually segregated by depth: in all four species investigated females occurred at greater depths than males. Potential birthing grounds were identified for H. mirabilis. Latitudinal spatial segregation was not evident in relation to sex or maturity stage. The patterns of segregation reported here suggest a potential for differential exploitation of the sexes by spatially focused fisheries. No Full Text Article in Journal/Newspaper Northeast Atlantic Griffith University: Griffith Research Online ICES Journal of Marine Science 70 6 1198 1205 |
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Open Polar |
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Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
topic |
Ecology not elsewhere classified |
spellingShingle |
Ecology not elsewhere classified Holt, Rebecca E. Foggo, Andrew Neat, Francis C. Howell, Kerry L. Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
topic_facet |
Ecology not elsewhere classified |
description |
Chimaeras such as Chimaera monstrosa and Hydrolagus mirabilis are commonly found in commercial bycatch of deep-sea fisheries in the Northeast Atlantic. Very little information exists on their life history, ecology or behaviour. Segregation of populations by sex and/or age classes has been demonstrated in several elasmobranchs, but whether segregation occurs in chimaeras, and if so what mechanisms are involved, remains unknown. This study investigates the distribution and sexual segregation of four species of chimaera (C. monstrosa, H. mirabilis, C. opalescens n. sp. and Harriotta raleighana) in relation to sex, size (maturity) class, bottom depth, and latitude. Data were obtained from annual trawl surveys undertaken by Marine Scotland, Aberdeen, from 1998–2009, at 400–2000 m in the Northeast Atlantic (55–59°N 5–11°W). A factorial General Linear Model (GLM) with planned contrasts indicated complex patterns of age- and sex-related segregation. All adult males and females were sexually segregated by depth: in all four species investigated females occurred at greater depths than males. Potential birthing grounds were identified for H. mirabilis. Latitudinal spatial segregation was not evident in relation to sex or maturity stage. The patterns of segregation reported here suggest a potential for differential exploitation of the sexes by spatially focused fisheries. No Full Text |
format |
Article in Journal/Newspaper |
author |
Holt, Rebecca E. Foggo, Andrew Neat, Francis C. Howell, Kerry L. |
author_facet |
Holt, Rebecca E. Foggo, Andrew Neat, Francis C. Howell, Kerry L. |
author_sort |
Holt, Rebecca E. |
title |
Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
title_short |
Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
title_full |
Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
title_fullStr |
Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
title_full_unstemmed |
Distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
title_sort |
distribution patterns and sexual segregation in chimaeras: implications for conservation and management |
publisher |
Oxford University Press |
publishDate |
2013 |
url |
http://hdl.handle.net/10072/173257 https://doi.org/10.1093/icesjms/fst058 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
ICES Journal of Marine Science http://hdl.handle.net/10072/173257 1095-9289 doi:10.1093/icesjms/fst058 |
op_doi |
https://doi.org/10.1093/icesjms/fst058 |
container_title |
ICES Journal of Marine Science |
container_volume |
70 |
container_issue |
6 |
container_start_page |
1198 |
op_container_end_page |
1205 |
_version_ |
1802648058918338560 |