Linked Life Data

17643507

Source:http://linkedlifedata.com/resource/pubmed/id/17643507

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2007-8-20
pubmed:abstractText
The present paper presents original data and a review of the copper (Cu) toxicity literature for estuarine and marine environments. For the first time, acute Cu toxicity across the full salinity range was determined. Killifish, Fundulus heteroclitus, eggs were hatched in freshwater (FW), 2.5, 5, 10, 15, 22 and 35 ppt (seawater, SW) and juveniles were allowed to acclimate for 7 days prior to acute toxicity testing. Sensitivity was highest in FW (96 h LC50: 18 microg/l), followed by SW (96 h LC50: 294 microg/l) with fish at intermediate salinities being the most tolerant (96 h LC50 > 963 microg/l at 10 ppt). This approximately 50-fold, non-linear variation in sensitivity could not be accounted for by Cu speciation or competition among cations but can be explained by physiology. The relative Na(+) gradient from the blood plasma to the water is greatest in FW followed by SW and is smallest at 10 ppt. Regression of Cu toxicity versus the equilibrium potential for Na(+), which reflects the relative Na(+) gradient, revealed that 93% of the variation can be attributed to Na(+) gradients and thus osmoregulatory physiology. Examination of the existing literature on acute Cu toxicity in SW (defined as >25 ppt) confirmed that early life stages generally are most sensitive but this pattern may be attributable to size rather than developmental stage. Regardless of developmental stage and phylogeny, size clearly matters for Cu sensitivity. The existing literature on the influence of salinity on acute Cu toxicity as well as studies of mechanisms of Cu toxicity in fish and invertebrates are reviewed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0166-445X
pubmed:author
pubmed:issnType
Print
pubmed:day
30
pubmed:volume
84
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
162-72
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Physiology is pivotal for interactions between salinity and acute copper toxicity to fish and invertebrates.
pubmed:affiliation
Marine Biology and Fisheries, RSMAS, University of Miami, Miami, FL 33149-1098, USA. mgrosell@rsmas.miami.edu
pubmed:publicationType
Journal Article, Review, Research Support, Non-U.S. Gov't