Population responses of the marine amphipod Corophium volutator (Pallas, 1766) to copper
作者： Mercedes Conradi , Michael H. Depledge
DOI: 10.1016/S0166-445X(98)00069-1
关键词: Copper 、 Sex ratio 、 Ecotoxicology 、 Biology 、 Ecology 、 Reproduction 、 Juvenile 、 Animal science 、 Toxicity 、 Corophium volutator 、 Population
摘要: The effects of copper concentrations on the life-history, growth and reproduction Corophium volutator were investigated. Amphipods exposed for 100 days to five sublethal (0.2, 0.4, 0.6, 0.8 1 mg l−1). Copper exposure significantly reduced age-specific survivorship longevity (P<0.001). Life-expectancy differed at various (P<0.005). Growth was greatly with exposure. degree reduction in rate increased increasing metal concentration. Animals 0.2 Cu l−1 exhibited a 2.4% specific (SGR), while those grown reductions SGR 16.7, 23.5 20%, respectively. length mature animals also following (P<0.05). Although sex ratio not affected (P=0.225), maturation fertility reduced. Survival ovigerous females by when these concentrations. These results suggest that long-term C. low could lead severe local population density decline because juvenile fertility. Long-term higher have more serious consequences such as extinction this species since juveniles experienced they unable reach stage.
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