Present investigation was aimed to understand the biodiversity, landing scenario, age and growth, sex ratio, population structure and population dynamics of commercially important fishes Cirrhinus mrigala and Oreochromis niloticus. The fish samples were collected on regular basis during the period August 2011 to July 2012 from the lower stretch of the Yamuna river at Allahabad, India. Fish biodiversity of the Yamuna river at Allahabad consisted of 85 fish species belong to 8 orders, 28 families and 63 genera. Cypriniformes and Cyprinidae were the most rich species order and family. Data on...

Cyprinus carpio was introduced into India during 1939 and 1957 for aquaculture purpose and it contributes more than 7.17% in total inland fish production. C. carpio was contributed maximum in the Yamuna river compared to Ganga river in landing scenario. Present investigation indicated that the growth rate was higher in the Yamuna river as compared to the Ganga river at Allahabad. The first two years growths were recorded 20.69 cm and 8.36 cm in the Yamuna river and 19.03 cm and 7.46 cm in the Ganga river, respectively. 0+ to 13+ age group fishes were recorded in the Yamuna while 0+ to 11+ age...