Ecology, Environment and Conservation Paper

LENGTH-WEIGHT RELATIONSHIP OF OREOCHROMIS MOSSAMBICUS (PETERS, 1852) FROM SELECTED RESERVOIRS OF NELLORE REGION, ANDHRA PRADESH, INDIA

D. Ramalingaiah1, S.K. Chakraborty, D.R.K. Reddy, N. Madhavan and T. Neeraja

Abstract

The present trends showing steadily declining conditions in marine capture fisheries. Production forms both inland capture and aquaculture is the most promising option for increasing fish production as per, FAO (2010) data. India’s total fish production in 2010 was 9.34 million metric tonners of which approximately 3.8 mmt is from marine capture and 5.5 mmt from inland capture and inland aquaculture sector. India stands 2nd in fish production in the world. Length-weight relationships have a number of other important applications in fisheries viz. Estimation of weight from length for individual fish and for length classes of fish, and estimation of standing-crop biomass when the length-frequency distribution is known. The present study was carried out at Nellore reservoir and Survepalli reservoir of Nellore State Andhra Pradesh, India. The length weight relationship of Mozambique Tilapia, Oreochromis mossambicus was established as, W=0.023196 L2.907804 for male: W=0.019565 L2.97768 for females and W=0.021605 L2.937556 for pooled. The analysis of covariance indicated that the regression coefficient (b) of the length-weight relationship of both differed significantly.