Effect of zinc on regeneration in the fiddler crab Uca pugilator and its interactions with methylmercury and cadmium |
| |
| Authors: | Judith Shulman Weis |
| |
| Institution: | Department of Zoology and Physiology, Rutgers, The State University, Newark, NJ 07102, USA |
| |
| Abstract: | After multiple autotomy (one chela and six walking legs) fiddler crabs (Uca pugilator) were exposed to zinc chloride, cadmium chloride, methylmercuric chloride or combinations of these metals. Zinc at 1, 3 and 5 ppm had a retarding effect on limb regeneration, which was amplified in water of reduced salinity. Methylmercury at 0·5 ppm and cadmium at 1·0 ppm have previously been found to retard regeneration. When crabs were exposed to meHg and Zn the effects were additive, both in sea water (30% salinity) and in water of reduced salinity (7–8%). However, when crabs were exposed to combinations of Zn and Cd the effects were antagonistic and the rate of regeneration was almost that of controls. In water of 7–8% salinity the Cd effect was greatly intensified and growth was almost totally prevented. The presence of Zn counteracted this and allowed growth and ecdysis to occur. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
