Cladocerans

Roach (rutilus rutilus), a medium-sized cyprinid fish, is a planktonic and benthic species, feeding mainly on cladocerans (D. longispina), detritus, plant debris, amphipods (Echinogammarus sp.), filamentous algae, and ostracods. Roach can thrive on poor quality, even polluted water and displays more capacity of adaptation to different kinds of food than rudd [62]. 

Arthropods Cladoceran, Daphnia magna Water hardness, in mg CaC03/L ... 

Reduced survival and fecundity of the cladoceran Daphnia magna at a concentration of 10 pg/L and exposure for 32 days (USEPA 1980)... 

Koivisto, S., M. Ketola, and M. Walls. 1992. Comparison of five cladoceran species in short-and long-term copper exposure. Hydrobiologia 248-125-136. 

In the cladoceran Daphnia magna, about 90% of the total body lead burden is adsorbed to the exoskeleton (Berglind et al. 1985). In animals with a vertebral column, total amounts of lead tend to increase with age. By far the most lead is bound to the skeleton, especially in areas of active bone formation (Barth et al. 1973 Tsuchiya 1979 USEPA 1980 Hejtmancik et al. 1982 Mykkanen etal. 1982 Peter and Strunc 1983 De Michele 1984 Eisler 1984 Berglind etal. 1985 Marcus 1985). The retention of lead stored in bone pools poses a number of difficulties for the usual multicompartmental loss-rate models. Some lead in bones of high medullary content, such as the... 

Cladoceran, D. magna 1.0 Reduced survival and impaired reproduction in 15 days 14... 

Zinc deficiency places an increased demand on selenium (Se) pools in daphnids. As little as 5 pg Se/L in zinc-free water eliminated overt cuticle damage and substantially increased reproduction, but did not alter the shortened life span. Cladocerans at the threshold of Se deficiency will become overtly Se deficient when zinc supplies are lacking (Keating and Caffrey 1989). Insufficient copper introduces cuticle problems in daphnids similar to those introduced by insufficient zinc or... 

Cladoceran, 51 dose-dependent manner no effect on survival of prenauplii larvae LC50 (96 h) 2... 

Cladoceran, Daphnia magna 20 After 6 weeks, whole-body residue of 300 pg/kg 1... 

Freshwater cladocerans and marine crustaceans were the most sensitive groups tested, with LC50 (96 h) values of less than 2 pg/L for the more sensitive species (Table 16.2). European eels (.Anguilla anguilla), rainbow trout (Oncorhynchus mykiss), and bluegills (.Lepomis macrochirus) seemed to be the most sensitive freshwater teleosts tested, with LC50 (96 h) values between 80... 

Cladoceran, Ceriodaphnia dubia Daphnid, Daphnia magna 0.5 14... 

These same dosages suppress nontarget populations of cladocerans, copepods, mayfly nymphs, corixids, and springtails (Miura and Takahashi 1975 Mulla etal. 1975 Booth and Ferrell 1977 Julin and Sanders 1978 Ah and Lord 1980a Cunningham 1986 Ali et al. 1988). 

After first treatment, reduction within 1 week of 3 species of cladocerans (Daphnia laevis, Ceriodaphnia sp., Bosmina longirostus sp.), and 2 species of copepods (Cyclops sp., Diaptomus sp.). No recovery of Daphnia and Ceriodaphnia for 6 months, but Bosmina reappeared 11 weeks later. Diaptomus was depleted for 4 months, but Cyclops recovered in 6-7 weeks. The amphipod Hyallela azteca was eliminated within 4 weeks, and no recolonization was evident after 6 months. No adverse effects on oligochaetes, snails (Physa sp.), or ostracods (Cyprodopsis sp.). After second treatment, temporary reduction in Cyclops and Bosmina, and no significant effects on ostracods, snails, or worms... 

Populations of diving beetles, cladocerans, and dragonfly naiads are suppressed for up to 3 weeks... 

Algal and rotifer populations increase due to lack of cladoceran grazing and competition... 

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