Toxicity of mercury during the embryonic development of Chasmagnathus granulatus (Brachyura, Varunidae)

SÁNCHEZ, M.V.; CAHANSKY, A.V.; LÓPEZ GRECO, L.S.; RODRÍGUEZ, E.M.

ENVIRONMENTAL RESEARCH

Elsevier

Lugar: Amsterdam; Año: 2005 vol. 99 p. 72 - 78

0013-9351

Ovigerous females of the estuarine crab Chasmagnathus granulatus were exposed to mercury (0.1 mg/L) during the entire, early, or late embryonic development. A delay in the egg incubation period and some morphological abnormalities were detected in larvae hatched  from exposed females. Particularly,  hypopigmentation of  body chromatophores was the abnormality that showed the highest incidence,  this incidence being greater  when ovigerous females were exposed to mercury either during the totality or just the fi.rst half of the egg incubation period. In contrast,  the effect of  mercury on the morphology and pigmentation of eyes was greater  when the exposure comprised the totality or just the second half of the incubation period. These results correlate with the timing of  both body pigment synthesis and eye formation during embryonic development. Although these abnormalities have been observed in the same species with other heavy metals, such as zinc and copper, the responsiveness during the early and late embryonic development was different with mercury.