Linked Life Data

16352450

Source:http://linkedlifedata.com/resource/pubmed/id/16352450

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-1-27
pubmed:abstractText
Green crabs, Carcinus maenas, exposed to dilute seawater (e.g., 5 ppt salinity, approximately 150 mOsm/kg) have hemolymph levels of methyl farnesoate (MF) that are up to 10-fold higher than animals in isosmotic seawater (27 ppt, approximately 800 mOsm/kg). In this paper, we examine aspects of osmotic and ionic stress to identify factors involved in elevating MF levels. MF levels did not rise after exposure to concentrated seawater, so only hypoosmotic stress elevates MF. MF levels rose in animals exposed to dilute seawater containing mannitol to make it isosmotic, indicating that the hypoosmotic rise in MF is due to decreased ion concentrations. Individual ions were investigated by exposing crabs either to isosmotic seawater with low concentrations of an ion or to dilute seawater with high concentrations of an ion. Ca(2+) and Mg(2+) in combination affected MF levels. Finally, we found that the increase in MF levels was accelerated when hemolymph osmolality was precociously lowered by partially replacing hemolymph with deionized water prior to transferring animals to dilute seawater. Thus, the 6-8 h delay between exposing crabs to dilute sea water and observing an increase in MF appears to reflect the time needed for specific hemolymph ions to decrease below a threshold concentration.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1095-6433
pubmed:author
pubmed:issnType
Print
pubmed:volume
143
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
67-77
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
The effect of seawater composition and osmolality on hemolymph levels of methyl farnesoate in the green crab Carcinus maenas.
pubmed:affiliation
Department of Biology, The College of New Jersey, P.O. Box 7718, Ewing, NJ 08628, USA. lovett@tcnj.edu
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural