Copepods Diaptomus

N.G. Hairston Jr. (1979). The effect of temperature on carotenoid photoprotection in the copepod Diaptomus nevadensis. Comp. Biochem. Physiol. A, 62,445-448. 

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... 

Naqvi, S.M., T.S. Leung, and N.Z. Naqvi. 1981. Toxicities of paraquat and metribuzin (Sencor) herbicides to the freshwater copepods, Eucyclops agilis and Diaptomus mississippiensis. Environ. Pollut. 26A 275-280. 

Freshwater copepods, 2 species Eucyclops, Diaptomus) Freshwater copepods, 2 species... 

Although laboratory studies have value for specific purposes, it is in the natural ecosystem that we must determine the behavior of a pesticide and its possible effect. Studies of the cycling of radionuclide-labeled pesticides in natural ecosystems are limited, since introduction of radionuclides into the environment involves public-health and public-relations issues as well as possibly difficult technical considerations. However, an ecosystem study was conducted by spraying a 4-acre marsh in western Sandusky Bay, Ohio, with Cl-labeled DDT. One aspect of the study involved the incorporation of the pesticide in some invertebrates of this aquatic ecosystem as determined by autoradiography (Webster, 1967). An amount of the pesticide suitable for mosquito control was applied to the study area by helicopter. Samples of leeches (Erpobdella punctata), am-phipods (Hyallela sp.), and copepods (Cyclops bicuspidatus, Diaptomus orga-nensis) were collected, fixed, sectioned, and autoradiographed. It was observed that leeches contained the pesticide or a Cl-compound, but none was detected in amphipods or copepods. 

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