The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine
The thorny skate (Amblyraja radiata) is a large species ofskate that is endemic to the waters of the western north Atlantic in the Gulf of Maine. Because the biomass of thorny skates has recently declined below threshold levels mandated by the Sustainable Fisheries Act, commercialharvests from this...
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ftoceandocs:oai:aquadocs.org:1834/26216 2023-05-15T17:34:59+02:00 The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine Sulikowski, James A. Kneebone, Jeff Elzey, Scott Jurek, Joe Danley, Patrick D. Howell, W. Huntting Tsang, Paul C. W. 2005 application/pdf 536-543 http://hdl.handle.net/1834/26216 en eng http://fishbull.noaa.gov/1033/sulikowski.pdf 0090-0656 http://hdl.handle.net/1834/26216 http://aquaticcommons.org/id/eprint/9607 403 2012-08-03 14:46:40 9607 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2005 ftoceandocs 2023-04-06T17:03:08Z The thorny skate (Amblyraja radiata) is a large species ofskate that is endemic to the waters of the western north Atlantic in the Gulf of Maine. Because the biomass of thorny skates has recently declined below threshold levels mandated by the Sustainable Fisheries Act, commercialharvests from this region are prohibited. We have undertakena comprehensive study to gain insight into the life history of this skate. The present study describes andcharacterizes the reproductive cycle of female and male thorny skates, based on monthly samples taken off the coast of New Hampshire, from May 2001 to May 2003. Gonadosomaticindex (GSI), shell gland weight, follicle size, and egg case formation, were assessed for 48 female skates. In general, these reproductive parameters remained relatively constant throughout most of the year. However, transient but significant increases in shell gland weight and GSI wereobser ved during certain months. Within the cohort of specimens sampled monthly throughout the year, a subset of females always had large preovulatory follicles present in their ovaries. With the exception of June and September specimens, egg cases undergoing various stages of development were observed in the uteri of specimens captured during all other months of the year. For males (n=48), histological stages III through VI (SIII−SVI) of spermatogenesis, GSI, and hepatosomatic index (HSI) wereexamined. Although there appeared to be monthly fluctuations in spermatogenesis, GSI, and HSI, no significant differences were found. The production and maintenance of mature spermatocysts (SVI) within the testes was observed throughout the year. These findings collectively indicate that the thorny skate is reproductively active year round. Article in Journal/Newspaper North Atlantic IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
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Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
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ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries |
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Biology Ecology Fisheries Sulikowski, James A. Kneebone, Jeff Elzey, Scott Jurek, Joe Danley, Patrick D. Howell, W. Huntting Tsang, Paul C. W. The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
topic_facet |
Biology Ecology Fisheries |
description |
The thorny skate (Amblyraja radiata) is a large species ofskate that is endemic to the waters of the western north Atlantic in the Gulf of Maine. Because the biomass of thorny skates has recently declined below threshold levels mandated by the Sustainable Fisheries Act, commercialharvests from this region are prohibited. We have undertakena comprehensive study to gain insight into the life history of this skate. The present study describes andcharacterizes the reproductive cycle of female and male thorny skates, based on monthly samples taken off the coast of New Hampshire, from May 2001 to May 2003. Gonadosomaticindex (GSI), shell gland weight, follicle size, and egg case formation, were assessed for 48 female skates. In general, these reproductive parameters remained relatively constant throughout most of the year. However, transient but significant increases in shell gland weight and GSI wereobser ved during certain months. Within the cohort of specimens sampled monthly throughout the year, a subset of females always had large preovulatory follicles present in their ovaries. With the exception of June and September specimens, egg cases undergoing various stages of development were observed in the uteri of specimens captured during all other months of the year. For males (n=48), histological stages III through VI (SIII−SVI) of spermatogenesis, GSI, and hepatosomatic index (HSI) wereexamined. Although there appeared to be monthly fluctuations in spermatogenesis, GSI, and HSI, no significant differences were found. The production and maintenance of mature spermatocysts (SVI) within the testes was observed throughout the year. These findings collectively indicate that the thorny skate is reproductively active year round. |
format |
Article in Journal/Newspaper |
author |
Sulikowski, James A. Kneebone, Jeff Elzey, Scott Jurek, Joe Danley, Patrick D. Howell, W. Huntting Tsang, Paul C. W. |
author_facet |
Sulikowski, James A. Kneebone, Jeff Elzey, Scott Jurek, Joe Danley, Patrick D. Howell, W. Huntting Tsang, Paul C. W. |
author_sort |
Sulikowski, James A. |
title |
The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
title_short |
The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
title_full |
The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
title_fullStr |
The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
title_full_unstemmed |
The reproductive cycle of the thorny skate (Amblyraja radiata) in the western Gulf of Maine |
title_sort |
reproductive cycle of the thorny skate (amblyraja radiata) in the western gulf of maine |
publishDate |
2005 |
url |
http://hdl.handle.net/1834/26216 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
http://aquaticcommons.org/id/eprint/9607 403 2012-08-03 14:46:40 9607 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1033/sulikowski.pdf 0090-0656 http://hdl.handle.net/1834/26216 |
_version_ |
1766133987621732352 |