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Exploitation of Fish in Tanks and Ponds West Bengal, 1957-61
J. M. Sengupta
Sankhyā: The Indian Journal of Statistics, Series B (1960-2002)
Vol. 28, No. 3/4 (Dec., 1966), pp. 293-306
Published by: Indian Statistical Institute
Stable URL: http://www.jstor.org/stable/25051582
Page Count: 14
You can always find the topics here!Topics: Ponds, Operating costs, Statistical estimation, Tillage, Frequency distribution, Proportions, Agricultural seasons, Market value, Cost allocation, Average cost
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This is a methodological study for estimating the quantity of fish exploited per year from inland waters like tanks and ponds. The experimental surveys carried out for this purpose was however interrupted resulting in an incomplete sample of very small size. Nevertheless, the results indicate that (i) a large proportion of tanks, specially the larger ones, are often left un-exploited (ii) quantity of catch per acre falls with an increasing size of the tank (iii) variability between villages is high, thus calling for a large number to be sampled in the first stage (iv) variability in total catch per tank is lower than variability in catch per acre. Over the five years, average catch was obtained as nearly 2 mds., giving a gross profit of about Rs. 100/- per acre, after deducting the direct expenses. A large sample for the estimation of inland water area and a smaller subsample for estimating "yield" per acre would be a suitable plan. For observation on the spot, investigators have to be stationed throughout the year in a small coverage and to be economic, such an enquiry must be linked up with other seasonal activities in a multipurpose scheme.
Sankhyā: The Indian Journal of Statistics, Series B (1960-2002) © 1966 Indian Statistical Institute