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Sallow-skin horseshoe crabs (late juvenile Tachypleus tridentatus) as osmoconformers
Published online by Cambridge University Press: 30 August 2011
Abstract
Sallow-skin horseshoe crabs (late juvenile Tachypleus tridentatus) from 30‰ salinity seawater were subjected to salinities ranging from 0‰ to 70‰ at 5‰ intervals for 7 days. They were returned to 30‰ salinity for 3 days for recovery. During this period, the survival rate, feeding rate, and body mass of the horseshoe crabs were measured. The sallow-skin horseshoe crabs survived well at 15‰–60‰ salinity, fed well at 30‰–55‰ salinity, gained mass at 0‰–25‰ salinity, lost mass at 45‰–70‰ salinity, and maintained mass at 30‰–40‰ salinity during salinity challenge. During the recovery period, the dehydrated (mass lost) horseshoe crabs rapidly gained mass, whereas the water-retaining (mass gained) horseshoe crabs rapidly lost mass. These results indicate that the sallow-skin T. tridentatus horseshoe crabs are osmoconformers and can tolerate a wide range of salinity changes, adapting gradually from inshore low salinity to offshore high salinity.
- Type
- Research Article
- Information
- Journal of the Marine Biological Association of the United Kingdom , Volume 92 , Issue 3 , May 2012 , pp. 463 - 468
- Copyright
- Copyright © Marine Biological Association of the United Kingdom 2011
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