| acute toxicities of cd2+, cr+6 hg2+, ni2+ and zn2+ to estuarine macrofauna. | static acute toxicity bioassays were conducted at 20 degrees c and 20 o/33 salinity with cdcl2-2 1/2 h20, k2cro4, hgcl2, nicl2-6h2o, and zncl2 using adults of starfish, asterias forbesi; sandworm, nereis virens; hermit crab, pagurus longicarpus; softshell clam, mya arenaria; mudsnail, nassarius obsoletus; and mummichog, fundulus heteroclitus, a fish. concentrations (mg/l metal) fatal to 50% of the organisms in 168 hr ranged from 0.004 (clam) to 0.8 (mummichog) for mercury; 0.7 (clam, worm, crab ... | 1977 | 901010 |