How does stocking density affect enhancement success for hatchery-reared red king crab?
Stock enhancement of red king crab (Paralithodes camtschaticus (Tilesius, 1815)) could increase the crab population near Kodiak, Alaska, which collapsed in the 1980s and has not recovered. We conducted a field experiment examining the effect of juvenile red king crab density on enhancement success....
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0330 |
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crcansciencepubl:10.1139/cjfas-2017-0330 2024-06-23T07:54:24+00:00 How does stocking density affect enhancement success for hatchery-reared red king crab? Long, William Christopher Cummiskey, Peter A. Munk, J. Eric 2018 http://dx.doi.org/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0330 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 11, page 1940-1948 ISSN 0706-652X 1205-7533 journal-article 2018 crcansciencepubl https://doi.org/10.1139/cjfas-2017-0330 2024-06-06T04:11:17Z Stock enhancement of red king crab (Paralithodes camtschaticus (Tilesius, 1815)) could increase the crab population near Kodiak, Alaska, which collapsed in the 1980s and has not recovered. We conducted a field experiment examining the effect of juvenile red king crab density on enhancement success. Hatchery-reared crabs were released in plots near Kodiak at three densities: 25, 50, and 75 m −2 . Crab densities were monitored for 6 months after release. Predation risk was measured via tethering experiments and predator density via quadrat and transect surveys. Neither migration nor mortality changed with crab density, but mortality rates decreased over time. Crab density did not affect predator density or predation risk, although predation risk decreased with time. Excluding the high initial mortality rate of 67.5%, the predicted survival after 6 months was 34%, which is better than the survival observed in a wild population. This suggests that red king crab enhancement is not predation limited and can occur at high densities. Further, processes affecting juvenile red king crab may not be strongly density dependent, at least at the scales and habitats tested. Article in Journal/Newspaper Kodiak Paralithodes camtschaticus Red king crab Alaska Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 75 11 1940 1948 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Stock enhancement of red king crab (Paralithodes camtschaticus (Tilesius, 1815)) could increase the crab population near Kodiak, Alaska, which collapsed in the 1980s and has not recovered. We conducted a field experiment examining the effect of juvenile red king crab density on enhancement success. Hatchery-reared crabs were released in plots near Kodiak at three densities: 25, 50, and 75 m −2 . Crab densities were monitored for 6 months after release. Predation risk was measured via tethering experiments and predator density via quadrat and transect surveys. Neither migration nor mortality changed with crab density, but mortality rates decreased over time. Crab density did not affect predator density or predation risk, although predation risk decreased with time. Excluding the high initial mortality rate of 67.5%, the predicted survival after 6 months was 34%, which is better than the survival observed in a wild population. This suggests that red king crab enhancement is not predation limited and can occur at high densities. Further, processes affecting juvenile red king crab may not be strongly density dependent, at least at the scales and habitats tested. |
format |
Article in Journal/Newspaper |
author |
Long, William Christopher Cummiskey, Peter A. Munk, J. Eric |
spellingShingle |
Long, William Christopher Cummiskey, Peter A. Munk, J. Eric How does stocking density affect enhancement success for hatchery-reared red king crab? |
author_facet |
Long, William Christopher Cummiskey, Peter A. Munk, J. Eric |
author_sort |
Long, William Christopher |
title |
How does stocking density affect enhancement success for hatchery-reared red king crab? |
title_short |
How does stocking density affect enhancement success for hatchery-reared red king crab? |
title_full |
How does stocking density affect enhancement success for hatchery-reared red king crab? |
title_fullStr |
How does stocking density affect enhancement success for hatchery-reared red king crab? |
title_full_unstemmed |
How does stocking density affect enhancement success for hatchery-reared red king crab? |
title_sort |
how does stocking density affect enhancement success for hatchery-reared red king crab? |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
http://dx.doi.org/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjfas-2017-0330 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjfas-2017-0330 |
genre |
Kodiak Paralithodes camtschaticus Red king crab Alaska |
genre_facet |
Kodiak Paralithodes camtschaticus Red king crab Alaska |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 75, issue 11, page 1940-1948 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjfas-2017-0330 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
75 |
container_issue |
11 |
container_start_page |
1940 |
op_container_end_page |
1948 |
_version_ |
1802646550685417472 |