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Abstract:

The effect of cadmium chloride (1 mg/L) on oocyte growth of the fiddler crab, Uca pugilator, was studied during the slow vitellogenesis phase of ovarian maturation of this carb. In vivo experiments were done with both intact and eyestalkless crabs. The intact cadmium-exposed crabs exhibited a significantly lower oocyte diameter than the controls at the end of the 2- week exposure period, but no significant differences were detected among the eyestalkless crabs, suggesting that the effect of cadmium could be on the sinus gland in the eyestalks, increasing secretion of the gonad-inhibiting hormone (GIH). To test this hypothesis, in vitro experiments were done, incubating pieces of ovary with and without eyestalk tissue, in the presence of thoracic ganglion, needed for oocyte growing due to the secretion of the gonad-stimulating hormone (GSH). Only when eyestalk tissue was present in the incubation media was oocyte growth inhibited by cadmium compared to the controls. These results strongly suggest that cadmium acts at least in part to increase the secretion of GIH from the sinus gland. GIH could then in turn act by (a) inhibiting secretion of GSH by the thoracic ganglion, (b) directly inhibit the oocytes, or (c) both (a) and (b). (C) 2000 Academic Press.

Registro:

Documento: Artículo
Título:Inhibition of ovarian growth by cadmium in the fiddler crab, Uca pugilator (Decapoda, Ocypodidae)
Autor:Rodríguez, E.M.; López Greco, L.S.; Fingerman, M.
Filiación:Animal Physiology Laboratory, Department of Biological Sciences, University of Buenos Aires, 1428, Buenos Aires, Argentina
Dept. of Ecol., Evol., and O., Tulane University, New Orleans, LA 70118-5698, United States
Palabras clave:Cadmium; Fiddler crab; Gonad-inhibiting hormone; Gonad-stimulating hormone; Ovarian maturation; Uca pugilator; cadmium; cadmium; crustacean; growth; animal cell; animal model; article; controlled study; crab; environmental exposure; growth inhibition; nonhuman; oocyte development; ovary development; pollutant; Animalia; Celuca pugilator; Crustacea; Decapoda; Decapoda (Crustacea); Ocypodidae; Uca
Año:2000
Volumen:46
Número:2
Página de inicio:202
Página de fin:206
DOI: http://dx.doi.org/10.1006/eesa.1999.1896
Título revista:Ecotoxicology and Environmental Safety
Título revista abreviado:Ecotoxicol. Environ. Saf.
ISSN:01476513
CODEN:EESAD
CAS:cadmium, 22537-48-0, 7440-43-9
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01476513_v46_n2_p202_Rodriguez

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Citas:

---------- APA ----------
Rodríguez, E.M., López Greco, L.S. & Fingerman, M. (2000) . Inhibition of ovarian growth by cadmium in the fiddler crab, Uca pugilator (Decapoda, Ocypodidae). Ecotoxicology and Environmental Safety, 46(2), 202-206.
http://dx.doi.org/10.1006/eesa.1999.1896
---------- CHICAGO ----------
Rodríguez, E.M., López Greco, L.S., Fingerman, M. "Inhibition of ovarian growth by cadmium in the fiddler crab, Uca pugilator (Decapoda, Ocypodidae)" . Ecotoxicology and Environmental Safety 46, no. 2 (2000) : 202-206.
http://dx.doi.org/10.1006/eesa.1999.1896
---------- MLA ----------
Rodríguez, E.M., López Greco, L.S., Fingerman, M. "Inhibition of ovarian growth by cadmium in the fiddler crab, Uca pugilator (Decapoda, Ocypodidae)" . Ecotoxicology and Environmental Safety, vol. 46, no. 2, 2000, pp. 202-206.
http://dx.doi.org/10.1006/eesa.1999.1896
---------- VANCOUVER ----------
Rodríguez, E.M., López Greco, L.S., Fingerman, M. Inhibition of ovarian growth by cadmium in the fiddler crab, Uca pugilator (Decapoda, Ocypodidae). Ecotoxicol. Environ. Saf. 2000;46(2):202-206.
http://dx.doi.org/10.1006/eesa.1999.1896