تلخیص
The fecundity and egg size of a teleost. Cohsa ft/shwa following acute and chronic exposure to different concentrations of Diazinon was investigated. Adult fish were exposed to Diazinon of concentrations 16.0 mg/1 (96 R-LC.3.). 12.0 mg/I (I.S.2:75) and 6.0 mg/I (1_,C 7) for 96 hours and 2.6 mg/1 (30 day-LCA and 1.3 mg/I (LC25) for 30 days during the preparatOry phase of the ovary, The fecundity was found to decrease by 60%, 42% and 19% in acute exposure of dose concentrations of 16.0 mg/1, 12.0 mg/1 and 6.0 mg/1. respectively. In chronic exposures of doses 2.6 mg/I and 1.3 mg/I the fecundity was found to decrease by 61% and 43%, respectively. The egg size was investigated to correlate directly with the increase in dose concentrations. There was 10.6% increase in egg size in 16.0 mg/I, 6.66% in 12.0 mg/1 and 3.9% in 6.0 mg/I in acute exposure, whereas in chronic exposure of Diazinon it was significant in 2.6 mg/I and non-significant in 1.3 mg/I as compared to the control.
JAVED IQBAL, ASMATULLAH , SHAHZAD AHMAD MUFTI. (2004) EFFECTS OF ACUTE AND CHRONIC EXPOSURES TO DIAZINON ON THE FECUNDITY AND EGG SIZE IN COLISA FASCIA TA , Punjab University Journal of Zoology, Volume 19, Issue .
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