title: Response of corticosteroidogenic, catecholamine-secreting cells, corpuscles of Stannius, and Dahlgren cells of snake headed murrel Ophiocephalus punctatus (Bloch) to thiodan treatment--a karyometric investigation.
abstract: Karyometric response of the corticosteroidogenic, catecholamine-secreting cells, corpuscles of Stannius, and Dahlgren cells of a freshwater snake headed murrel Ophiocephalus punctatus to the thiodan or endosulfan EC 35 treatment, a popular insecticide, have been described using cellular and nuclear indices. Adult fish belonging to both sexes were used in the present study and all fish were in the resting phase of their gonadal cycle. Experiment was conducted under natural room temperature and day length for 30 days. Experimental fish were maintained in 1 ppm thiodan solution, which was changed on alternate days after feeding with minced goat liver. Corticosteroidogenic cells of treated fish appeared highly active and cytoplasm was almost eosinophobic. Both cellular and nuclear indices of treated fish exhibited significant increase (P less than 0.001) when compared to the controls. However, no significant change could be observed in the cellular and nuclear indices of the catecholamine-secreting cells, corpuscles of Stannius, and Dahlgren cells. Possible mechanism(s) of the thiodan action on the corticosteroidogenic cells have been discussed in the text.
mesh_terms: D000305:Adrenal Cortex Hormones / Q000096:biosynthesis*; D000818:Animals; D002395:Catecholamines / Q000378:metabolism*; D004726:Endosulfan / Q000633:toxicity*; D005260:Female; D005399:Fishes / Q000502:physiology*; D007620:Karyometry; D008297:Male
chemical_list: D000305:Adrenal Cortex Hormones; D002395:Catecholamines; D004726:Endosulfan