Chronic effects of Cd on the reproduction of the guppy (Poecilia reticulata) through Cd-accumulated midge larvae (Chironomus yoshimatsui)

Journal Article · Tue Dec 01 00:00:00 EST 1987 · Ecotoxicol. Environ. Saf.; (United States)

DOI:https://doi.org/10.1016/0147-6513(87)90062-5· OSTI ID:5551028

Hatakeyama, S; Yasuno, M

Chronic effects of Cd on the growth and reproduction of the guppy (Poecilia reticulata) were studied using a food chain model, midge larvae as prey and guppy as predator. The transfer rate of Cd from the midge to the guppy was between 0.5 and 1% during the 30-day experiment. Growth rate of the guppy fed Cd-accumulated midge larvae (270 micrograms/g dry wt) for 30 days was not impaired. Cumulative numbers of fry produced by the guppy fed Cd-accumulated midge larvae (210 micrograms/g) for 2 months decreased to ca. 80% of the control. Guppies had been fed the Cd-accumulated midges from 30 days old for 7 months. Cumulative numbers of fry produced by the guppy fed midge larvae-accumulated 500, 800, and 1300 micrograms Cd/g for 6 months decreased to 79, 65, and 55% of the control, respectively. Similar effects of Cd on the reproduction of guppy were shown between the guppies fed the Cd-accumulated midge larvae (500 micrograms Cd/g) and exposed to 10 or 20 micrograms Cd/liter for the 6 months. The Cd concentrations of the digestive tract, liver, and kidney increased strongly, indicating that such Cd accumulation was brought on mainly through the Cd-accumulated midges. Mortality of the female guppies fed larvae-accumulated 1300 micrograms Cd/g increased abruptly from the 6 months of the experiment, whereas no male guppy died during the experiment.

• Research Organization: National Institute for Environmental Studies, Ibaraki, Japan
• OSTI ID: 5551028
• Journal Information: Ecotoxicol. Environ. Saf.; (United States), Vol. 14:3
• Country of Publication: United States
• Language: English

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