A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea
A nursery site for the Alaska skate (Bathyraja parmifera)was sampled seasonally from June 2004 to July 2005. At the small nursery site (~2 km2), located in a highly productive area near the shelf-slope interface at the head of Bering Canyon in the eastern Bering Sea, reproductive males and females d...
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2008
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ftoceandocs:oai:aquadocs.org:1834/25478 2023-05-15T15:43:20+02:00 A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea Hoff, Gerald R. 2008 application/pdf 233-244 http://hdl.handle.net/1834/25478 en eng http://fishbull.noaa.gov/1063/hoff.pdf 0090-0656 http://hdl.handle.net/1834/25478 http://aquaticcommons.org/id/eprint/8829 403 2012-06-12 17:54:20 8829 United States National Marine Fisheries Service Biology Ecology Fisheries article TRUE 2008 ftoceandocs 2023-04-06T17:02:54Z A nursery site for the Alaska skate (Bathyraja parmifera)was sampled seasonally from June 2004 to July 2005. At the small nursery site (~2 km2), located in a highly productive area near the shelf-slope interface at the head of Bering Canyon in the eastern Bering Sea, reproductive males and females dominated the catch and neonate and juvenile skates were rare. Seasonal samples showed summertime (June and July) as the peak reproductive time in the nursery although some reproduction occurred throughout the year. Timeseriesanalysis of embryo length frequencies revealed that three cohorts were developing simultaneously and the period of embryonic development was estimated at 3.5 years and averageembryo growth rate at 0.2 mm/day. Estimated egg case deposition occurred mainly during summertime and hatching occurred during winter months. Protracted hatching timesmay be common for oviparous elasmobranch species and may be directly correlated with ambient temperatures as evident from a meta-data analysis. Evidence indicates that the Alaska skate uses the eastern Bering Sea outer continental shelf region for reproduction and the middle and innershelf regions as habitat for immature and subadults. Skate nurseries may be vulnerable to disturbances because they are located in highly productive areas and because embryos develop slowly. Article in Journal/Newspaper Bering Sea Alaska IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Bering Canyon ENVELOPE(-165.032,-165.032,54.894,54.894) Bering Sea |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Ecology Fisheries |
spellingShingle |
Biology Ecology Fisheries Hoff, Gerald R. A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
topic_facet |
Biology Ecology Fisheries |
description |
A nursery site for the Alaska skate (Bathyraja parmifera)was sampled seasonally from June 2004 to July 2005. At the small nursery site (~2 km2), located in a highly productive area near the shelf-slope interface at the head of Bering Canyon in the eastern Bering Sea, reproductive males and females dominated the catch and neonate and juvenile skates were rare. Seasonal samples showed summertime (June and July) as the peak reproductive time in the nursery although some reproduction occurred throughout the year. Timeseriesanalysis of embryo length frequencies revealed that three cohorts were developing simultaneously and the period of embryonic development was estimated at 3.5 years and averageembryo growth rate at 0.2 mm/day. Estimated egg case deposition occurred mainly during summertime and hatching occurred during winter months. Protracted hatching timesmay be common for oviparous elasmobranch species and may be directly correlated with ambient temperatures as evident from a meta-data analysis. Evidence indicates that the Alaska skate uses the eastern Bering Sea outer continental shelf region for reproduction and the middle and innershelf regions as habitat for immature and subadults. Skate nurseries may be vulnerable to disturbances because they are located in highly productive areas and because embryos develop slowly. |
format |
Article in Journal/Newspaper |
author |
Hoff, Gerald R. |
author_facet |
Hoff, Gerald R. |
author_sort |
Hoff, Gerald R. |
title |
A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
title_short |
A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
title_full |
A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
title_fullStr |
A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
title_full_unstemmed |
A nursery site of the Alaska skate (Bathyraja parmifera) in the eastern Bering Sea |
title_sort |
nursery site of the alaska skate (bathyraja parmifera) in the eastern bering sea |
publishDate |
2008 |
url |
http://hdl.handle.net/1834/25478 |
long_lat |
ENVELOPE(-165.032,-165.032,54.894,54.894) |
geographic |
Bering Canyon Bering Sea |
geographic_facet |
Bering Canyon Bering Sea |
genre |
Bering Sea Alaska |
genre_facet |
Bering Sea Alaska |
op_source |
http://aquaticcommons.org/id/eprint/8829 403 2012-06-12 17:54:20 8829 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1063/hoff.pdf 0090-0656 http://hdl.handle.net/1834/25478 |
_version_ |
1766377411072491520 |