A study on the effects of four heavy metals on five species of chironomous larvae present on Mahé Island of Seychelles
2013
Vedamanikam, V.J. | Bandara, A. | Boncoeur, P.
A study was conducted on the island of Mahé, Seychelles, on five species of chironomous larvae endemic to the island. The chironomous larvae were exposed to four heavy metals – copper (Cu), cadmium (Cd), mercury (Hg), and zinc (Zn), for a 96-hr period, and the LC ₅₀ values were calculated. It was observed that the most sensitive species of chironomous larvae was Gymnometriocnemus mahensis . The least sensitive form of chironomous larvae examined was Paramerina minima. The 96-hr LC ₅₀ values obtained for Tanypus complanatus for Cu, Cd, Hg, and Zn were 1.9 (1.73–2.09), 1.35 (1.17–1.57), 0.33 (0.26–0.43), and 28.96 (27.03–31.03) ppm, respectively. Similar results were obtained for other species studied.
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