On the size of eggs found in the mouth of two males of the cat-fish, Tachysurus caelatus (Valenciennes)

Two males of the cat fish, Tachysurus caelatus (Val.) with eggs in the mouth were collected on 28th May 1965. The eggs in the mouth of one fish were yellow and large (11-15 mm), and were in advanced stage of development; their diameter frequency distribution was unimodal. On the other hand the eggs in the mouth of the other fish were in a bunch, and the diameter frequency distribution showed three groups each with a distinct mode. The largest group of eggs (11-13 mm) were yellow, but the embryos could not be distinguished. The other groups of ova were white, much smaller in size (less than 6 mm), were not fertilised and were obviously disintegrating. The present observations indicate that some species of fishes may release all size-categories of ova, both mature and immature, in the course of spawning

Exploratory trawling on the continental shelf along the north-western part of the Bay of Bengal

The results of exploratory trawl'ng undertaken from 1961 to 1965 on the continental shelf along the north-western part of the Bay of Bengal, between latitudes 16''40'N and 2rOO'N are presented. The composition of the catch, the distribution of the various categories of fishes and their relative abundance in space and time are indicated. It is estimated that in commercial fishing, with Visakhapatnam as the base, a 25 m side-trawler with 15 m trawl should be able to land 250-390 metric tons of fishes, a 14 m stern-trawler with 14m trawl, 67-174 metric tons, and a 13-7 m stern-trawler with 12 m trawl, 56-94 metric tons per year from the area

Pelagic fishery resources of Lawson’s bay, Waltair

At Lawson's B;y, the gears employed are shoreseines, boatseines, hooks and lines, surface g!llnets and bottom-set nylon nets. During the period 1970 to 1974, the estimated total annual landings by all gears were 654. 8, 62?.0', 577.<)8, 542.4 and 637.3 tonnes, respectively. The ca'iches by hooks and lines alone accounted for 50-60% of the tot.l landings during the period. Seasonal abundance of fish showed correlations with hydrological and planktological conditions and the food avalable in environment. Far pelagic fi&hes, high catch rates were obtained during Novem'ber to May and to a lesser extent during July-September. Prawns were caught in greater proportions by gillnets than by boat seines, the former being employed during May-September period. The adverse effects arising out of the introduction of bottom-set gillnets in the fishery are discussed

Not Available

Not AvailableAt Lawson's B;y, the gears employed are shoreseines, boatseines, hooks and lines, surface g!llnets and bottom -set nylon nets. During the period 1970 to 1974, the estimated total annual landings by all gears were (654. 8, 62?.0', 577.<)8, 542.4 and 637.3 tonnes, respectively. The ca'iches by hooks and lines alone accounted for 50 -60% of the tot.l landings during the period. Seasonal abundance of fish showed correlations with hydrological and planktological conditions and the food avalable in environment. Far pelagic fi&hes, high catch rates were obtained during Novem'ber to May and to a lesser extent during July -September. Prawns were caught in greater proportions by gillnets than by boat seines, the former being employed during May -September period. The adverse effects arising out of the introduction of bottom -set gillnets in the fishery are discussed.Not Availabl