Pollution Research Paper

Vol 34, Issue 1, 2015; Page No.(167-169)

LENGTH-WEIGHT RELATIONSHIP OF NILE TIPLAPIA, OREOCHROMIS NILOTICUS (LINNAEUS, 1758) AND FROM SELECTED RESERVOIRS OF NELLORE REGION, ANDHRA PRADESH, INDIA

D. RAMALINGAIAH, S.K. CHAKRABORTY, R.K. REDDY, N. MADHAVAN AND T. NEERAJA

Abstract

In the context of steadily declining trends in marine capture fisheries. Production form 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 was 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 Nile Tilapia, Oreochromis niloticus was established as, W=0.016843 L3.068824 for male: W=0.027399 L2.911307 for females and W=0.020468 L3.005396 for pooled. The analysis of covariance indicated that the regression coefficient (b) of the length-weight relationship differed significantly.

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