Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico
The Bering skate, Bathyraja interrupta, is one of the most common skate species in Alaskan waters. Skates are a regular bycatch in Alaskan commercial long line and bottom trawl fisheries, and there is increasing interest in directed fishing of skates in the region. Until recently, little was known a...
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ftcalifstunimbay:oai:digitalcommons.csumb.edu:caps_thes-1067 2023-05-15T15:43:08+02:00 Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico Ainsley, Shaara Michiko 2009-01-01T08:00:00Z application/pdf https://digitalcommons.csumb.edu/caps_thes/68 https://digitalcommons.csumb.edu/cgi/viewcontent.cgi?article=1067&context=caps_thes unknown Digital Commons @ CSUMB https://digitalcommons.csumb.edu/caps_thes/68 https://digitalcommons.csumb.edu/cgi/viewcontent.cgi?article=1067&context=caps_thes Capstone Projects and Master's Theses skate Bathyraja interrupta age growth reproduction life history Bering Sea Gulf of Alaska bycatch text 2009 ftcalifstunimbay 2021-12-28T15:25:20Z The Bering skate, Bathyraja interrupta, is one of the most common skate species in Alaskan waters. Skates are a regular bycatch in Alaskan commercial long line and bottom trawl fisheries, and there is increasing interest in directed fishing of skates in the region. Until recently, little was known about the life histories of Alaskan species. This is the first study to examine the age, growth and age at maturity of B. interrupta, and one of the few studies to compare life history characteristics of a skate species among management regions. No significant difference between sexes was detected in either region. However, a slight but significant difference was found between regions. The parameters of the von Bertalanffy growth function were L∞ = 112.5 cm TL and k-1yr = 0.06 for the eastern Bering Sea and L∞ = 119.2 cm TL and k-1yr = 0.06 for the Gulf of Alaska. Age estimates provided a minimum longevity of 19 years and 21 years for the eastern Bering Sea and Gulf of Alaska respectively. In the Gulf of Alaska, the size at maturity was estimated as 69 cm TL for males and 71 cm TL for females, while the age at maturity was estimated as 11.6 years and 12.0 years respectively. In the eastern Bering Sea, the size at maturity was estimated as 70 cm TL for males and 72 cm TL for females, which corresponded to 13.1 years and 11.2 years respectively. Text Bering Sea Common skate Alaska Digital Commons @ CSUMB (California State University, Monterey Bay) Bering Sea Gulf of Alaska |
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Open Polar |
collection |
Digital Commons @ CSUMB (California State University, Monterey Bay) |
op_collection_id |
ftcalifstunimbay |
language |
unknown |
topic |
skate Bathyraja interrupta age growth reproduction life history Bering Sea Gulf of Alaska bycatch |
spellingShingle |
skate Bathyraja interrupta age growth reproduction life history Bering Sea Gulf of Alaska bycatch Ainsley, Shaara Michiko Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
topic_facet |
skate Bathyraja interrupta age growth reproduction life history Bering Sea Gulf of Alaska bycatch |
description |
The Bering skate, Bathyraja interrupta, is one of the most common skate species in Alaskan waters. Skates are a regular bycatch in Alaskan commercial long line and bottom trawl fisheries, and there is increasing interest in directed fishing of skates in the region. Until recently, little was known about the life histories of Alaskan species. This is the first study to examine the age, growth and age at maturity of B. interrupta, and one of the few studies to compare life history characteristics of a skate species among management regions. No significant difference between sexes was detected in either region. However, a slight but significant difference was found between regions. The parameters of the von Bertalanffy growth function were L∞ = 112.5 cm TL and k-1yr = 0.06 for the eastern Bering Sea and L∞ = 119.2 cm TL and k-1yr = 0.06 for the Gulf of Alaska. Age estimates provided a minimum longevity of 19 years and 21 years for the eastern Bering Sea and Gulf of Alaska respectively. In the Gulf of Alaska, the size at maturity was estimated as 69 cm TL for males and 71 cm TL for females, while the age at maturity was estimated as 11.6 years and 12.0 years respectively. In the eastern Bering Sea, the size at maturity was estimated as 70 cm TL for males and 72 cm TL for females, which corresponded to 13.1 years and 11.2 years respectively. |
format |
Text |
author |
Ainsley, Shaara Michiko |
author_facet |
Ainsley, Shaara Michiko |
author_sort |
Ainsley, Shaara Michiko |
title |
Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
title_short |
Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
title_full |
Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
title_fullStr |
Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
title_full_unstemmed |
Age, growth and reproduction of the Bering skate, Bathyraja interrupta (Gill & Townsend, 1897), from the eastern Bering Sea and Gulf of Mexico |
title_sort |
age, growth and reproduction of the bering skate, bathyraja interrupta (gill & townsend, 1897), from the eastern bering sea and gulf of mexico |
publisher |
Digital Commons @ CSUMB |
publishDate |
2009 |
url |
https://digitalcommons.csumb.edu/caps_thes/68 https://digitalcommons.csumb.edu/cgi/viewcontent.cgi?article=1067&context=caps_thes |
geographic |
Bering Sea Gulf of Alaska |
geographic_facet |
Bering Sea Gulf of Alaska |
genre |
Bering Sea Common skate Alaska |
genre_facet |
Bering Sea Common skate Alaska |
op_source |
Capstone Projects and Master's Theses |
op_relation |
https://digitalcommons.csumb.edu/caps_thes/68 https://digitalcommons.csumb.edu/cgi/viewcontent.cgi?article=1067&context=caps_thes |
_version_ |
1766377170933907456 |