Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt
SYNOPSIS. Bering Sea snow crabs (Chionoecetes opilio) are a commercially important crab harvested in the Bering Sea. Optimal management of this species requires an understanding of the biology of this crab that is currently incomplete. Fisheries managers apply a continuous growth model in their mana...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.662.3397 2023-05-15T15:43:24+02:00 Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt Sherry L. Tamone Melissa M. Adams Jessica M. Dutton The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3397 http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3397 http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf text 2005 ftciteseerx 2016-01-08T16:56:03Z SYNOPSIS. Bering Sea snow crabs (Chionoecetes opilio) are a commercially important crab harvested in the Bering Sea. Optimal management of this species requires an understanding of the biology of this crab that is currently incomplete. Fisheries managers apply a continuous growth model in their management of snow crab, which assumes that male crabs increase in size throughout their lifespan. Male snow crabs undergo a morphometric molt that leads to a disproportionate increase in chelae size and it is still debated whether this molt is associated with a terminal molt. This study was conducted to determine whether adult male C. opilio are anecdysic. Using current knowledge of the hormonal regulation of crustacean growth, snow crab physiology was manipulated to induce an increase in molting hormones (ecdysteroids). Since female snow crabs are known to undergo a terminal molt after attaining reproductive maturity, we com-pared ecdysteroid levels in eyestalk-ablated terminally molted females, small-clawed males and large-clawed males. Snow crabs were collected from the Bering Sea and maintained in circulating seawater at approxi-mately 68C. Animals were either eyestalk-ablated or left intact. Ecdysteroid levels in hemolymph were quan-tified using an enzyme-linked immunosorbant assay (ELISA). Circulating ecdysteroids were significantly higher in small-clawed male crabs when compared to large-clawed males or terminally molted females. Eyestalk-ablation increased circulating ecdysteroids in small-clawed males, but had no significant effect on circulating ecdysteroids in large-clawed males or in terminally molted females. Text Bering Sea Chionoecetes opilio Snow crab Unknown Bering Sea |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
SYNOPSIS. Bering Sea snow crabs (Chionoecetes opilio) are a commercially important crab harvested in the Bering Sea. Optimal management of this species requires an understanding of the biology of this crab that is currently incomplete. Fisheries managers apply a continuous growth model in their management of snow crab, which assumes that male crabs increase in size throughout their lifespan. Male snow crabs undergo a morphometric molt that leads to a disproportionate increase in chelae size and it is still debated whether this molt is associated with a terminal molt. This study was conducted to determine whether adult male C. opilio are anecdysic. Using current knowledge of the hormonal regulation of crustacean growth, snow crab physiology was manipulated to induce an increase in molting hormones (ecdysteroids). Since female snow crabs are known to undergo a terminal molt after attaining reproductive maturity, we com-pared ecdysteroid levels in eyestalk-ablated terminally molted females, small-clawed males and large-clawed males. Snow crabs were collected from the Bering Sea and maintained in circulating seawater at approxi-mately 68C. Animals were either eyestalk-ablated or left intact. Ecdysteroid levels in hemolymph were quan-tified using an enzyme-linked immunosorbant assay (ELISA). Circulating ecdysteroids were significantly higher in small-clawed male crabs when compared to large-clawed males or terminally molted females. Eyestalk-ablation increased circulating ecdysteroids in small-clawed males, but had no significant effect on circulating ecdysteroids in large-clawed males or in terminally molted females. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sherry L. Tamone Melissa M. Adams Jessica M. Dutton |
spellingShingle |
Sherry L. Tamone Melissa M. Adams Jessica M. Dutton Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
author_facet |
Sherry L. Tamone Melissa M. Adams Jessica M. Dutton |
author_sort |
Sherry L. Tamone |
title |
Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
title_short |
Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
title_full |
Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
title_fullStr |
Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
title_full_unstemmed |
Effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, Chionoecetes opilio: physiological evidence for a terminal molt |
title_sort |
effect of eyestalk-ablation on circulating ecdysteroids in hemolymph of snow crabs, chionoecetes opilio: physiological evidence for a terminal molt |
publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3397 http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea Chionoecetes opilio Snow crab |
genre_facet |
Bering Sea Chionoecetes opilio Snow crab |
op_source |
http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.662.3397 http://hofmannlab.msi.ucsb.edu/people/jessie-dutton/Tamone-+Adams+and+Dutton+2005.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766377495200792576 |