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RECORD NUMBER: 206 OF 845

OLS Field Name OLS Field Data
Main Title Chronic Effects of Cadmium on Two Species of Mysid Shrimp: 'Mysidopsis bahia' and 'Mysidopsis bigelowi'.
Author Gentile, S. M. ; Gentile, J. H. ; Walker, J. ; Heltshe, J. F. ;
CORP Author Environmental Research Lab., Narragansett, RI.
Year Published 1982
Report Number EPA-600/J-82-159;
Stock Number PB84-144369
Additional Subjects Cadmium ; Shrimp ; Metals ; Survival ; Reproduction(Biology) ; Bioassay ; Temperature ; Salinity ; Reprints ; Mysidopsis bahia ; Mysidopsis bigelowi
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NTIS  PB84-144369 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 12p
Abstract Two species of mysid shrimp, the sub-tropical Mysidopsis bahia and the northern temperate Mysidopsis bigelowi, were exposed simultaneously to cadmium (as CdC12) in a continuous-flow bioassay system to determine the effect on survival and reproductive success. Temperature and salinity were maintained at 21 plus or minus 1lC and 30% respectively. The 96-h LC50 was 110 microgram per liter for both species. The 23-day life cycle LC50 for M. bahia was 19.5 microgram per liter and for M. bigelowi the 27-day LC-50 was 14.8 microgram per liter. At 10 microgram per liter a series of morphological aberrations were observed in both species at the onset of sexual maturity. Carapace malformations apparently prevented molting after the release of the initial brood and resulted in death of brooding females. As a result, although the initial reproductive rate at this concentration was successful, successive broods could not be produced. For both species in this study the no observed effect concentration was 5.1 microgram per liter; the effect concentration was 10.0 microgram per liter. Mechanisms were postulated in this study to explain the effect of cadmium on the molting process and on calcification and enzymatic reactions of osmosis.
Supplementary Notes Pub. in Hydrobiologia 93, p195-204 1982.
NTIS Title Notes Journal article.
Title Annotations Reprint: Chronic Effects of Cadmium on Two Species of Mysid Shrimp: 'Mysidopsis bahia' and 'Mysidopsis bigelowi'.
PUB Date Free Form 1982
Category Codes 6T; 6F; 57Y; 68D
NTIS Prices PC A02/MF A01
Primary Description 600/05
Document Type NT
Cataloging Source NTIS/MT
Control Number 409019565
Origin NTIS
Type CAT