Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment
Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species rep...
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Language: | English |
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Online Access: | https://archimer.ifremer.fr/doc/00188/29902/29420.pdf https://doi.org/10.1016/j.fishres.2014.03.019 https://archimer.ifremer.fr/doc/00188/29902/ |
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ftarchimer:oai:archimer.ifremer.fr:29902 2023-05-15T17:41:42+02:00 Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment Moura, Teresa Jones, Emma Clarke, Maurice W. Cotton, Charles F. Crozier, Paul Daley, Ross K. Diez, Guzman Dobby, Helen Dyb, Jan E. Fossen, Inge Irvine, Sarah B. Jakobsdottir, Klara Lopez-abellan, Luis J. Lorance, Pascal Pascual-alayon, Pedro Severino, Ricardo B. Figueiredo, Ivone 2014-09 application/pdf https://archimer.ifremer.fr/doc/00188/29902/29420.pdf https://doi.org/10.1016/j.fishres.2014.03.019 https://archimer.ifremer.fr/doc/00188/29902/ eng eng Elsevier Science Bv info:eu-repo/grantAgreement/EC/FP7/227390/EU//DEEPFISHMAN https://archimer.ifremer.fr/doc/00188/29902/29420.pdf doi:10.1016/j.fishres.2014.03.019 https://archimer.ifremer.fr/doc/00188/29902/ 2014 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use Fisheries Research (0165-7836) (Elsevier Science Bv), 2014-09 , Vol. 157 , P. 47-61 Commercial fishery data Deep-sea Life stage Population structure Survey data text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1016/j.fishres.2014.03.019 2021-09-23T20:24:25Z Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species reproductive spatial dynamics. This study draws together information on the distribution of reproductive stages of three species of squaliform sharks: Portuguese dogfish Centroscymnus coelolepis (Somniosidae), leafscale gulper shark Centrophorus squamosus (Centrophoridae) and birdbeak dogfish Deania calcea (Centrophoridae), gathering data from several geographical areas from the Atlantic, Indian and Pacific Oceans. For each species we analysed the sex ratio and the spatial patterns of reproductive stages within regions, considering the influence of geographical area, depth, season, temperature and salinity. The combination of statistical methods used in this study successfully identified a number of life history patterns which reflect different use of habitats by sex and life cycle stage. Pregnant females of the three species are spatially segregated, inhabiting shallower and/or warmer waters. In the case of the leafscale gulper shark this segregation might be associated with large scale migrations. In contrast, in Portuguese dogfish all adult maturity stages occur in the same geographical area. Pregnant female birdbeak dogfish were rare in all samples. Larger immature specimens of all the three species distribute deeper than the remaining maturity stages in most of the regions analysed. Mature males of leafscale gulper shark and birdbeak dogfish were more broadly distributed than mature females, supporting the possibility of sex-biased dispersal. Neonates and small sized specimens were scarce in the Northeast Atlantic potentially explained by their concentration in nurseries, and/or by gear selectivity. Management measures will benefit from considering the geographic scale of demographic variation between species. However, standardized collaborative approaches will be needed for comprehensive assessment. Article in Journal/Newspaper Northeast Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Indian Pacific Fisheries Research 157 47 61 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Commercial fishery data Deep-sea Life stage Population structure Survey data |
spellingShingle |
Commercial fishery data Deep-sea Life stage Population structure Survey data Moura, Teresa Jones, Emma Clarke, Maurice W. Cotton, Charles F. Crozier, Paul Daley, Ross K. Diez, Guzman Dobby, Helen Dyb, Jan E. Fossen, Inge Irvine, Sarah B. Jakobsdottir, Klara Lopez-abellan, Luis J. Lorance, Pascal Pascual-alayon, Pedro Severino, Ricardo B. Figueiredo, Ivone Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
topic_facet |
Commercial fishery data Deep-sea Life stage Population structure Survey data |
description |
Deep-water sharks exhibit species-specific reproductive strategies, which include segregation by sex, size and reproductive stage. However, due to the wide spatial distribution of most species, available information, usually collected at a regional scale, is usually not adequate to infer species reproductive spatial dynamics. This study draws together information on the distribution of reproductive stages of three species of squaliform sharks: Portuguese dogfish Centroscymnus coelolepis (Somniosidae), leafscale gulper shark Centrophorus squamosus (Centrophoridae) and birdbeak dogfish Deania calcea (Centrophoridae), gathering data from several geographical areas from the Atlantic, Indian and Pacific Oceans. For each species we analysed the sex ratio and the spatial patterns of reproductive stages within regions, considering the influence of geographical area, depth, season, temperature and salinity. The combination of statistical methods used in this study successfully identified a number of life history patterns which reflect different use of habitats by sex and life cycle stage. Pregnant females of the three species are spatially segregated, inhabiting shallower and/or warmer waters. In the case of the leafscale gulper shark this segregation might be associated with large scale migrations. In contrast, in Portuguese dogfish all adult maturity stages occur in the same geographical area. Pregnant female birdbeak dogfish were rare in all samples. Larger immature specimens of all the three species distribute deeper than the remaining maturity stages in most of the regions analysed. Mature males of leafscale gulper shark and birdbeak dogfish were more broadly distributed than mature females, supporting the possibility of sex-biased dispersal. Neonates and small sized specimens were scarce in the Northeast Atlantic potentially explained by their concentration in nurseries, and/or by gear selectivity. Management measures will benefit from considering the geographic scale of demographic variation between species. However, standardized collaborative approaches will be needed for comprehensive assessment. |
format |
Article in Journal/Newspaper |
author |
Moura, Teresa Jones, Emma Clarke, Maurice W. Cotton, Charles F. Crozier, Paul Daley, Ross K. Diez, Guzman Dobby, Helen Dyb, Jan E. Fossen, Inge Irvine, Sarah B. Jakobsdottir, Klara Lopez-abellan, Luis J. Lorance, Pascal Pascual-alayon, Pedro Severino, Ricardo B. Figueiredo, Ivone |
author_facet |
Moura, Teresa Jones, Emma Clarke, Maurice W. Cotton, Charles F. Crozier, Paul Daley, Ross K. Diez, Guzman Dobby, Helen Dyb, Jan E. Fossen, Inge Irvine, Sarah B. Jakobsdottir, Klara Lopez-abellan, Luis J. Lorance, Pascal Pascual-alayon, Pedro Severino, Ricardo B. Figueiredo, Ivone |
author_sort |
Moura, Teresa |
title |
Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
title_short |
Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
title_full |
Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
title_fullStr |
Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
title_full_unstemmed |
Large-scale distribution of three deep-water squaloid sharks: Integrating data on sex, maturity and environment |
title_sort |
large-scale distribution of three deep-water squaloid sharks: integrating data on sex, maturity and environment |
publisher |
Elsevier Science Bv |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00188/29902/29420.pdf https://doi.org/10.1016/j.fishres.2014.03.019 https://archimer.ifremer.fr/doc/00188/29902/ |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
Fisheries Research (0165-7836) (Elsevier Science Bv), 2014-09 , Vol. 157 , P. 47-61 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/227390/EU//DEEPFISHMAN https://archimer.ifremer.fr/doc/00188/29902/29420.pdf doi:10.1016/j.fishres.2014.03.019 https://archimer.ifremer.fr/doc/00188/29902/ |
op_rights |
2014 Elsevier B.V. All rights reserved. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.fishres.2014.03.019 |
container_title |
Fisheries Research |
container_volume |
157 |
container_start_page |
47 |
op_container_end_page |
61 |
_version_ |
1766143391663390720 |