Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau
AbstractThree species of Southern Ocean skates, Bathyrajaeatonii,Bathyrajairrasa and Bathyrajamurrayi, are commonly caught as incidental by-catch in fisheries around Heard Island and McDonald Islands of the Kerguelen Plateau. We used length-at-age data to present the species’ life history informatio...
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ftdeakinunifig:oai:figshare.com:article/20583276 2024-09-15T17:41:43+00:00 Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau Jian Wen Darren Wong JJ Smart J Barrow J Cleeland P Yates P Ziegler JR Rizzari 2022-01-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30174558 https://figshare.com/articles/journal_contribution/Age_growth_and_maturity_of_Southern_Ocean_skates_Bathyraja_spp_from_the_Kerguelen_Plateau/20583276 unknown http://hdl.handle.net/10536/DRO/DU:30174558 https://figshare.com/articles/journal_contribution/Age_growth_and_maturity_of_Southern_Ocean_skates_Bathyraja_spp_from_the_Kerguelen_Plateau/20583276 All Rights Reserved Fisheries sciences not elsewhere classified Antarctica Biodiversity & Conservation Biodiversity Conservation By-catch Ecology Elasmobranch Environmental Sciences & Ecology FISHERIES Life history Life Sciences & Biomedicine Rajidae RAYS Science & Technology SELECTION SHARKS VALIDATION Vertebral ageing School of Life and Environmental Sciences Centre for Marine Fisheries and Aquaculture Sciences Text Journal contribution 2022 ftdeakinunifig 2024-06-26T23:32:55Z AbstractThree species of Southern Ocean skates, Bathyrajaeatonii,Bathyrajairrasa and Bathyrajamurrayi, are commonly caught as incidental by-catch in fisheries around Heard Island and McDonald Islands of the Kerguelen Plateau. We used length-at-age data to present the species’ life history information (age, growth and maturity for the first-time). Length- and age-at-maturity analyses revealed that B.irrasa matured at > 6 years old and > 1000 mm total length (TL), which was older and larger than B.murrayi (> 5 years old and > 400 mm TL) but similar to B.eatonii (> 5 years old and > 900 mm). We fitted growth models using a multi-model Bayesian framework. Our findings support the assumption that B.irrasa is slow growing and late maturing compared to B.eatonii and B.murrayi, consequently putting it at greater risk to fishery-induced increases in mortality compared to other species (e.g., B.murrayi). This is the first-time age and growth has been estimated for these species, however sample sizes for B.murrayi and B.eatonii were small and hence growth models should be interpreted with caution. Our results represent vital information for population projection models and can therefore assist in the development and/or revision of current by-catch limits to inform ongoing management strategies and conservation efforts. Article in Journal/Newspaper Antarc* Antarctica Heard Island McDonald Islands Southern Ocean DRO - Deakin Research Online |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Fisheries sciences not elsewhere classified Antarctica Biodiversity & Conservation Biodiversity Conservation By-catch Ecology Elasmobranch Environmental Sciences & Ecology FISHERIES Life history Life Sciences & Biomedicine Rajidae RAYS Science & Technology SELECTION SHARKS VALIDATION Vertebral ageing School of Life and Environmental Sciences Centre for Marine Fisheries and Aquaculture Sciences |
spellingShingle |
Fisheries sciences not elsewhere classified Antarctica Biodiversity & Conservation Biodiversity Conservation By-catch Ecology Elasmobranch Environmental Sciences & Ecology FISHERIES Life history Life Sciences & Biomedicine Rajidae RAYS Science & Technology SELECTION SHARKS VALIDATION Vertebral ageing School of Life and Environmental Sciences Centre for Marine Fisheries and Aquaculture Sciences Jian Wen Darren Wong JJ Smart J Barrow J Cleeland P Yates P Ziegler JR Rizzari Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
topic_facet |
Fisheries sciences not elsewhere classified Antarctica Biodiversity & Conservation Biodiversity Conservation By-catch Ecology Elasmobranch Environmental Sciences & Ecology FISHERIES Life history Life Sciences & Biomedicine Rajidae RAYS Science & Technology SELECTION SHARKS VALIDATION Vertebral ageing School of Life and Environmental Sciences Centre for Marine Fisheries and Aquaculture Sciences |
description |
AbstractThree species of Southern Ocean skates, Bathyrajaeatonii,Bathyrajairrasa and Bathyrajamurrayi, are commonly caught as incidental by-catch in fisheries around Heard Island and McDonald Islands of the Kerguelen Plateau. We used length-at-age data to present the species’ life history information (age, growth and maturity for the first-time). Length- and age-at-maturity analyses revealed that B.irrasa matured at > 6 years old and > 1000 mm total length (TL), which was older and larger than B.murrayi (> 5 years old and > 400 mm TL) but similar to B.eatonii (> 5 years old and > 900 mm). We fitted growth models using a multi-model Bayesian framework. Our findings support the assumption that B.irrasa is slow growing and late maturing compared to B.eatonii and B.murrayi, consequently putting it at greater risk to fishery-induced increases in mortality compared to other species (e.g., B.murrayi). This is the first-time age and growth has been estimated for these species, however sample sizes for B.murrayi and B.eatonii were small and hence growth models should be interpreted with caution. Our results represent vital information for population projection models and can therefore assist in the development and/or revision of current by-catch limits to inform ongoing management strategies and conservation efforts. |
format |
Article in Journal/Newspaper |
author |
Jian Wen Darren Wong JJ Smart J Barrow J Cleeland P Yates P Ziegler JR Rizzari |
author_facet |
Jian Wen Darren Wong JJ Smart J Barrow J Cleeland P Yates P Ziegler JR Rizzari |
author_sort |
Jian Wen Darren Wong |
title |
Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
title_short |
Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
title_full |
Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
title_fullStr |
Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
title_full_unstemmed |
Age, growth and maturity of Southern Ocean skates (Bathyraja spp.) from the Kerguelen Plateau |
title_sort |
age, growth and maturity of southern ocean skates (bathyraja spp.) from the kerguelen plateau |
publishDate |
2022 |
url |
http://hdl.handle.net/10536/DRO/DU:30174558 https://figshare.com/articles/journal_contribution/Age_growth_and_maturity_of_Southern_Ocean_skates_Bathyraja_spp_from_the_Kerguelen_Plateau/20583276 |
genre |
Antarc* Antarctica Heard Island McDonald Islands Southern Ocean |
genre_facet |
Antarc* Antarctica Heard Island McDonald Islands Southern Ocean |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30174558 https://figshare.com/articles/journal_contribution/Age_growth_and_maturity_of_Southern_Ocean_skates_Bathyraja_spp_from_the_Kerguelen_Plateau/20583276 |
op_rights |
All Rights Reserved |
_version_ |
1810487965038673920 |