Punjab University Journal of Zoology

1-11

Authors: Syed Shahid Ali, Muhammad Ayub Qureshi, Muhammad Javed Iqbal and Abdul Rauf Shakoori

Fresh water fish, Cyprinus carpio was exposed to zinc chloride (50 g/ml) for 48 hours (short term experiment) and 4 weeks (long term experiment). The liver samples were taken out at 6, 12, 24 and 48 hours in first case and at 1,2,3, and 4 weeks duration in second case, and analysed for biochemical changes. In short-term experiment hepatic AP, AcP and GOT activities decreased significantly at 12, 24 and 48 hours zinc chloride treatment. The GPT activity showed decrease (83% and 64%) at 6 and 12 hours while LDH activity was inhibited (56%) only at 6 hours and showed recovery in remaining experimental period. Glycogen content increased (54% and 106%) while glucose showed significant decrease (43% and 45%) at 24 and 48 hours zinc exposure. RNA content increased 32%, 17% and 24% at 12, 24 and 48 hours treatments, respectively. in long-term experiment all the enzyme activities remained unchanged following zinc treatment, except LDH activity which was decreased (70 and 62%) at 1 and 2 week treatments. Prominent decrease (27, 24 and 38% at 1,2 and 3 weeks) in glycogen content and increase (37 and 41% at 1 and 2 weeks, respectively) in glucose content was also observed. Free amino acids showed 56, 34 and 41% increase at 2,3 and 4 week treatments. Hepatic proteins also showed slight alterations.

27-35

Authors: Muhammad Saeed Akhtar and Nisar Ahmad

Morphometric analysis of O. assamensis Holmgrem, is discussed in detail. Odontotermes assamensis differs from O. obesus in tooth of left mandible from tip, which is more anteriorly located in O. assamensis.