Effect of thermal and heavy metal stress on the interstitial gland (leydig cells) in the testis of glossogobius giuris ( ham).
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Aquatic pollutants cause adverse effects on growth, development and reproduction. Stress causes cytomorphological changes in the testis of fishes. The freshwater gobiid fish, Glossogobius giuris was exposed to sub-lethal concentrations of Copper sulphate (0.3 and 0.5ppm), Cadmium sulphate (0.02 and 0.04ppm), temperature (20° C and 30 °C) and their combination for short term (24 to 96 hours) duration to understand the reproductive modulations. The Interstitial gland is in the form of a discrete mass, whose shape, size and color varies with the season and reproductive cycle. Histochemically, the glandular cells show positive reaction to Sudan Black B. Heavy metals induced cytomorphological changes in the testis such as disorganization of lobules and spermatogenic elements. Further, interstitial cells have undergone degranulation, pycnosis, vacuolization and degeneration.This was evident from the lowering of the Gonadosomatic Index (GSI). Whereas, in fishes exposed to combination of heavy metals and temperature (30°C) the interstitial cells showed necrosis with reduction in secretory material when compared to lower temperature. This study suggests that the stressors inhibit steroidogenesis which in turn affects spermatogenesis and thereby alters the reproductive potential of the fish.
Effect of thermal and heavy metal stress on the interstitial gland (leydig cells) in the testis of Glossogobius giuris (Ham.) | Request PDF. Available from: https://www.researchgate.net/publication/327499910_Effect_of_thermal_and_heavy_metal_stress_on_the_interstitial_gland_leydig_cells_in_the_testis_of_Glossogobius_giuris_Ham [accessed Sep 21 2018].