Gary H. Cook

Hexachlorobenzene: Effects on Several Estuarine Animals

Tests were conducted to determine (1) the acute (96-hour) toxicity of hexachlofobenzene (HCD) to pink shrimp (Penaeus duorarum), grass shrimp (Palaemonetes pugio), sheepshead minnows (Cyprinodon variegalus) and pinfish (lAgodon rhomboides) and (2) the rate of HCD uptake and depuration by pinfish. Hexachlorobenzene was not acutely toxic to any of the animals tested at measured concentrations in sea water to 25 ug/1. However, both species of shrimps in the highest HeB concentration were lethargic as compared to controls and exhibited an uncharacteristically white hepatopancreas at the end of...

Year
1974

Dieldrin: Effects on Several Estuarine Organisms

Tests were conducted to determine (1) the acute toxicity of dieldrin in flowing sea water to American oysters (Crassostrea virginica), pink shrimp (Penaeus duorarum), grass shrimp (Palaemonetes pugio) and sheepshead minnows (Cyprinodon variegatus) and (2) the rate of dieldrin uptake and depuration by spot (Leiostomus xanthurus). Acute (96-hour) EC50's were: oysters, 12.5 ug/1; pink shrimp, 0.9 ug/l; grass shrimp, 11.4 ug/1; and sheepshead minnows 23.6 ug/I. Spot exposed to 0.0135,0.075,0.135,0.75 or 1.35 ug/l for 35 days accumulated the chemical with maximum concentrations attained in II...

Year
1973