Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope
Eight Bathyraja skate species, Bathyraja aleutica , Bathyraja interrupta , Bathyraja lindbergi , Bathyraja maculata , Bathyraja minispinosa , Bathyraja parmifera , Bathyraja taranetzi and Bathyraja trachura , collected along the eastern Bering Sea continental slope were examined for reproductive fea...
Published in: | Journal of Fish Biology |
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crwiley:10.1111/j.0022-1112.2005.00628.x 2024-06-23T07:51:45+00:00 Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope Ebert, D. A. 2005 http://dx.doi.org/10.1111/j.0022-1112.2005.00628.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0022-1112.2005.00628.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0022-1112.2005.00628.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 66, issue 3, page 618-649 ISSN 0022-1112 1095-8649 journal-article 2005 crwiley https://doi.org/10.1111/j.0022-1112.2005.00628.x 2024-06-13T04:22:55Z Eight Bathyraja skate species, Bathyraja aleutica , Bathyraja interrupta , Bathyraja lindbergi , Bathyraja maculata , Bathyraja minispinosa , Bathyraja parmifera , Bathyraja taranetzi and Bathyraja trachura , collected along the eastern Bering Sea continental slope were examined for reproductive features. The sex ratio for six of eight Bathyraja skate species studied was c . 1 : 1 with males dominating for B. interrupta and B. parmifera . Five of eight species examined, B. aleutica , B. lindbergi , B. parmifera , B. taranetzi and B. trachura approximately equalled or exceeded the maximum reported total length, L T . Maximum L T for three species ( B. interrupta , B. minispinosa and B. parmifera ) revealed that the largest individuals were males and that in three other species ( B. lindbergi , B. maculata and B. trachura ) both females and males grew to approximately the same size. Both females and males matured at approximately the same L T for seven of eight species. Only female B. aleutica matured at a much larger size than males. All species matured within a narrow size range following a protracted juvenile stage and once mature these skates appeared to grow very little. First maturity for all species occurred at ≥80% of their maximum L T . The number of oocytes did not significantly differ between the left and right ovary for any species. The total number of mature oocytes increased with L T for six of eight species examined. The number of oocytes for one species, B. aleutica , increased in number until 145 cm L T , then declined in those individuals greater in length. The egg cases of all species are described, of which four ( B. lindbergi , B. parmifera , B. taranetzi and B. trachura ) have never been previously reported. Evidence is presented that suggest skates may be limited to as little as one and as many as 13 spawning seasons, depending on the species, and that senescence may occur in older individuals. Article in Journal/Newspaper Bering Sea Wiley Online Library Bering Sea Journal of Fish Biology 66 3 618 649 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Eight Bathyraja skate species, Bathyraja aleutica , Bathyraja interrupta , Bathyraja lindbergi , Bathyraja maculata , Bathyraja minispinosa , Bathyraja parmifera , Bathyraja taranetzi and Bathyraja trachura , collected along the eastern Bering Sea continental slope were examined for reproductive features. The sex ratio for six of eight Bathyraja skate species studied was c . 1 : 1 with males dominating for B. interrupta and B. parmifera . Five of eight species examined, B. aleutica , B. lindbergi , B. parmifera , B. taranetzi and B. trachura approximately equalled or exceeded the maximum reported total length, L T . Maximum L T for three species ( B. interrupta , B. minispinosa and B. parmifera ) revealed that the largest individuals were males and that in three other species ( B. lindbergi , B. maculata and B. trachura ) both females and males grew to approximately the same size. Both females and males matured at approximately the same L T for seven of eight species. Only female B. aleutica matured at a much larger size than males. All species matured within a narrow size range following a protracted juvenile stage and once mature these skates appeared to grow very little. First maturity for all species occurred at ≥80% of their maximum L T . The number of oocytes did not significantly differ between the left and right ovary for any species. The total number of mature oocytes increased with L T for six of eight species examined. The number of oocytes for one species, B. aleutica , increased in number until 145 cm L T , then declined in those individuals greater in length. The egg cases of all species are described, of which four ( B. lindbergi , B. parmifera , B. taranetzi and B. trachura ) have never been previously reported. Evidence is presented that suggest skates may be limited to as little as one and as many as 13 spawning seasons, depending on the species, and that senescence may occur in older individuals. |
format |
Article in Journal/Newspaper |
author |
Ebert, D. A. |
spellingShingle |
Ebert, D. A. Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
author_facet |
Ebert, D. A. |
author_sort |
Ebert, D. A. |
title |
Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
title_short |
Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
title_full |
Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
title_fullStr |
Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
title_full_unstemmed |
Reproductive biology of skates, Bathyraja(Ishiyama), along the eastern Bering Sea continental slope |
title_sort |
reproductive biology of skates, bathyraja(ishiyama), along the eastern bering sea continental slope |
publisher |
Wiley |
publishDate |
2005 |
url |
http://dx.doi.org/10.1111/j.0022-1112.2005.00628.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.0022-1112.2005.00628.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.0022-1112.2005.00628.x |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Journal of Fish Biology volume 66, issue 3, page 618-649 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.0022-1112.2005.00628.x |
container_title |
Journal of Fish Biology |
container_volume |
66 |
container_issue |
3 |
container_start_page |
618 |
op_container_end_page |
649 |
_version_ |
1802642886624280576 |