US EPA

1358539 

Technical Report 

Arsenic induced structural changes during the ovarian cycle of a freshwater perch, Colisa fasciatus 

Shukla, JP; Pandey, K 

1984 

HEEP/84/10877 

TAIPEI 

TAIPEI 

69-74 

eng 

HEEP COPYRIGHT: BIOL ABS. The structural changes during the different phases (preparatory, mature, spawning and post-spawning) of the ovarian cycle of C. fasciatus exposed to sublethal concentration (14.00 mg/l for 30 days) of As2O3 were studied. The follicular spaces became prominent and development of the 2nd oocyte stage decreased significantly (P 0.001) during the preparatory and mature phases. The 3rd oocyte stage did not develop while the atretic structure increased numerically and a decrease in the cortical yolk vesicle was observed during the mature phase. During the spawning phase, apart from the occurrence of atretic structures and stromal hemorrhage, no appreciable change was observed. No apparent change was seen during the post-spawning phase. Possible causes for these structural changes under stress were discussed. General changes of the fish following As2O3 exposure were also recorded.