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Volume 03 No. 01 January 1991
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Browsing Volume 03 No. 01 January 1991 by Issue Date

Browsing Volume 03 No. 01 January 1991 by Issue Date

Now showing items 1-11 of 11

The Declining Pole and Line Fishery in Sri Lanka

Amarasiri, C. (1991)

Pole and line fishing, which is specifically aimed at skipjack tuna has been practised in Sri Lanka for about 70 years. Originally, this method was popular amongst fishermen in the southern coast, and was later expanded ...
Incidence of Some Pathogenic Organisms in Cultured Shrimp (Penaeus monodon) Collected from Chilaw

Fonseka, T.D.G.; Hettiarachchi, K. (1991)

Samples offarm shrimp and pond water were collectedfrom Chi/aw. Total bacterial counts of coliforms and Escherichia coli are reportedfor these samples. Pathogens Vibrio parahaemolyticus, and Salmonella along with ...
Interrelationships among the Species of the Genus Puntius (Teleostei, Cyprinidae) as Indicated by the Caudal Skeletons

Jinadasa, J.; Kotalawala, A.B. (1991)

The studies on the osteology of caudal skeleton and the ray counts showed that the species of Puntius studied fall into two groups. one containing 11 species and the other with one species. The major group with I I species ...
An Analysis of Acid Vase, Ionic and Water Balance in Rainbow Trout (Salmo gairdneri) Exercised at Cruising Speeds

Attygalle, M.V.E. (1991)

Rainbow trout (Salmo gairdneri) were exercised at cruising speeds for 5 hours. A slight but significant increase in dorsal aortic blood pH after I hour of exercise was accompanied by significant decreases in PeDl and ...
The Burying Ability of O Group Dover Sole

Jinadasa, J.; Baynes, S.M.; Howell, B.R. (1991)

The particle size of a substrate determines the ability of 0 group Dover sole Solea solea (L.) to bury for concealment. The larger thefish, however, the larger the particle size in which they are able to bury. When ...
A Review of Marine Fin Fish Fisheries Research in Sri Lanka from 1902 to 1900

Jinadasa, J. (1991)

Fisheries Research in Sri Lanka started to gain momentum in the 195O's from a low ebb prior to independence. It was because colonial rulers before 1948 paid very little attention to develop fisheries. They were exploring ...
Limnology Project at Mahaweli Reservoirs:I. Some Physical Properties of Kotmale, Victoria and Randenigala Reservoirs

Piyasiri, Swarna (1991)

The Physical properties of Kotmale, Victoria and Randenigala reservoirs were studied since 1987 upto now and this paper presents the data obtained during 1987. The transparency values changed with the reservoir and the ...
The Role of Tilapia Species (Family Cichlidae) in the Fishery of Three Upland, Deep Reservoirs of Sri Lanka

De Silva, K.H.G.M.; De Silva, P.K. (1991)

The fish catches of three upland reservoirs, namely, Kotmale, Victoria and Randenigala reservoirs, were studied for periods of 8, 18 and 9 months, respectively. Tilapia species formed 60-70 % of the catch of all three ...
Preliminary Observations on the Anopheline Mosquitoes of Gomadiyagala A Village in the North Western Province of Sri Lanka

Wickramasinghe, M.B.; De Silva, B.G.D.N.K.; Perera, O.P.; Ratnayake, W.E. (1991)

Investigations on anopheline mosquitoes were carried out in Gomadiyagala during January-December 1989, primarily to gather base-line data in relation toa collaborative study between the Entomology Division, Anti-Malaria ...
A Preliminary Survey of Domiciliary Cockroaches and Their Oothecal Parasites in Sri Lanka

Kumarasinghe, N.C.; Edirisinghe, Jayanthi P. (1991)

A survey of domiciliary cockroaches and their oothecal parasites was carried out in 17 districts. The study was based on empty and live cockroach oothecae collected from dwelling houses. Five species of cockroaches; ...
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Browsing Volume 03 No. 01 January 1991 by Issue Date

Browsing Volume 03 No. 01 January 1991 by Issue Date

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