Comparative toxicity of four heavy metals to Gambusia affinis and Daphnia magna in aqueous systems | ||
Journal of Pest Control and Environmental Sciences | ||
Volume 5, Issue 2, December 1993, Pages 91-102 PDF (570.55 K) | ||
Document Type: Original Article | ||
DOI: 10.21608/jpces.1993.460818 | ||
Author | ||
Ali A. Elsebae* | ||
Dept. of Plant Production and Protection, Alareesh Faculty of Agriculture, Suez Canal Univ., Alareesh, North Sinai, Egypt. | ||
Abstract | ||
Cadmium, lead, mercury and tin in the form of water soluble cations were compared for their acute toxicity 96 h LC50 against the mosquito fish Gambusia affinis and the water flea Daphnia magna. Daphnids were more sensitive to all the tested heavy metals than the mosquito fish with 85-300 fold differences. Mercury was the strongest toxic cation, followed by tin. Cadmium, and lead in a decreasing order. The high susceptibility of Daphnia magna supports its use for detection of heavy metals polluted aquatic ecosystems. On the other hand, the relatively tolerant behaviour of the mosquito fish Gambusia affinis qualifies it for its essential role as a biological larvivorous fish to control the disease. Transmitting mosquito larvae particularly in stagnant water systems. The data indicated also that cadmium and tin are more hazardous to aquatic biota than lead. | ||
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