Effects of cadmium exposure on feeding of freshwater planktonic crustaceans.
1. Effects of cadmium exposure (0.010-0.100 ppm) on food consumption and assimilation rates of crustacean zooplankton from 2 lakes were studied in laboratory using radioisotope (14C) technique. 2. The inhibiting effects were significant 48 hr after Cd-exposure, but not after 20 hr exposure. 3. Daphnia spp. were the most affected cladocerans; copepods, especially the cyclopoids, appeared less sensitive. 4. The decrease in assimilation rates was much more marked than in the consumption rates. 5. The 14C-technique offers quick and sensitive means of studying the effects of heavy metal toxicity.
D000818:Animals; D002104:Cadmium / Q000633:toxicity*; D003445:Crustacea / Q000187:drug effects* / Q000502:physiology; D004781:Environmental Exposure; D005247:Feeding Behavior / Q000187:drug effects*; D010933:Plankton / Q000187:drug effects*; D013997:Time Factors; D014873:Water Pollutants / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D015048:Zooplankton / Q000187:drug effects* / Q000502:physiology
D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D002104:Cadmium