||Determination and Use of Condition Index of Oysters.
Lawrence, David R. ;
Scott, Geoffrey I. ;
||South Carolina Univ., Columbia. Belle W. Baruch Inst. for Marine Biology and Coastal Research.;Environmental Research Lab., Gulf Breeze, FL.
Indicator species ;
Water pollution detection ;
Water pollution effects(Animals)
||Some EPA libraries have a fiche copy filed under the call number shown.
Oyster condition measures should be standardized through use of Hopkins' formula: Condition Index - (dry meat weight in g) (100)/(internal cavity volume in cu. cm.). Cavity volumes, previously measured chiefly as capacity by a water displacement method, may be determined by subtracting the weight in air of the oyster's valves from the weight in air of the intact oyster (both in g). This method is valid because the effective density of cavity contents is close to 1 g per cu. cm. The technique is simple and time-efficient and could promote more widespread use of oyster condition studies.