Toxicity of mercury during the embryonic development of Chasmagnathus granulatus (Brachyura, Varunidae).
Ovigerous females of the estuarine crab Chasmagnathus granulatus were exposed to mercury (0.1mg/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 first 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.
Sánchez
María Victoria
MV
Department of Biodiversity and Experimental Biology, FCEyN, Pab II, University of Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.
Cahansky
Alejandra V
AV
López Greco
Laura S
LS
Rodríguez
Enrique M
EM
D000818:Animals; D003386:Brachyura / Q000196:embryology*; D004625:Embryo, Nonmammalian / Q000187:drug effects; D047108:Embryonic Development / Q000187:drug effects*; D005124:Eye Abnormalities / Q000139:chemically induced* / Q000196:embryology; D005260:Female; D007814:Larva / Q000187:drug effects; D008628:Mercury / Q000633:toxicity*; D010858:Pigmentation / Q000187:drug effects; D014874:Water Pollutants, Chemical / Q000633:toxicity*
D014874:Water Pollutants, Chemical; D008628:Mercury