Hyallela azteca

Residues of dv-chlordanc were preferentially stored and magnified over tran.v-chlordane by freshwater fish and invertebrates in ponds treated with technical chlordane at concentrations up to 1.14 pg/L. The di-isomer, with an estimated Tb 1/2 of 46 days, persisted longer than did the trans-isomer (Johnson and Finley 1980). Tissue concentrations of 106,000 pg total chlordanes/kg, on a lipid weight basis, were associated with reduced survival of estuarine invertebrates (Zitko 1978). Moribund amphipods (Hyallela azteca), for example, contained 137,000 to 2,180,000 pg/kg lipid of various chlordanes, heptachlors, and chlordenes (Zitko 1978). In fish, chlordane concentrations of 300,000 to 4,000,000 pg/kg lipid weight in tissues were lethal (Zitko 1978). 

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... 

Halter, M.T., W.J. Adams, and H.E. Johnson. 1980. Selenium toxicity to Daphnia magna, Hyallela azteca, and the fathead minnow in hard water. Bull. Environ. Contam. Toxicol. 24 102-107. 

Vandenberg G.F., D. Adriaen, T. Verslycke, and C.R. Janssen (2003). Effects of 17a-ethinylestradiol on sexual development of the amphipod Hyallela azteca. Ecotoxicology and Environmental Safety 54 216-222. 

In addition, Fairchild et al. (64) exposed an outdoor stream community consisting of a diverse invertebrate benthic population, Hyallela azteca, and Pimephales promelas. These organisms were exposed to a mean concentration of 0.35 mg/L, a concentration not expected to cause adverse effects if the laboratory-generated NOEC data were protective of the system. End points assessed during the 45-day exposure included a variety of periphytic and benthic invertebrate community measurements. These authors found no effects on the biota contained in this study at 35 mg/L of C12LAS. 

Barber, T.R., Fuchsman, P.C., Chappie, D.J., Sferra, J.C., Newton, F.C. and Sheehan, P.J. (1997) Toxicity of hexachlorobenzene to Hyallela azteca and Chironomus tentans in spiked sediment bioassays, Environmental Toxicology and Chemistry 16 (8), 1716-1720. 

Becker, D.S., Rose, C.D. and Bigham, G.N. (1995) Comparison of the 10-day freshwater sediment toxicity tests using Hyallela azteca and Chironomus tentans, Environmental Toxicology and Chemistry 14 (12), 2089-2094. 

Kubitz, J.A., Besser, J.M. and Giesy, J.P. (1996) A two-step experimental design for a sediment bioassay using growth of the amphipod Hyallela azteca for the test end point, Environmental Toxicology and Chemistry 15(10), 1783-1792. 

Kuhne, W.W., Caldwell, C.A., Gould, W.R., Fresquez, P.R. and Finger, S.E. (2002) Effects of depleted uranium on the health and survival of Ceriodaphnia dubia and Hyallela azteca, Environmental... 

Hyallela azteca Water column 8.2 ppb anthracene Anthracene 2h 3.20 150 Landrum and... 

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