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Species Composition, Distribution and Economic Importance of Fishes in the Bolgoda Lagoon

Jinadasa, J.; Jayantha, H.D.S.; Perera, W.V.J. (1992)

There are 55 species of fin fishes belonging to 33 families in the Bolgoda Lagoon, of which about 30 are commercially important. Sardinella melanura, Caranx sansun, Leognathus. sp, Mugil cephalus, Etroplus suratensis and ...

Some Interesting Features of an "Impromptu Test" set up to Evaluate the Minimum Level of Competence in Mathematical Manipulation

Fernando, P.C.B.; Mapalagama, C. (1992)

This paper essentially examines ihe predictive nature of an "impromptu test" iff respect of future performance in Physics at the B.Sc. (B.S.) degree.

Seasonal Diurnal and Vertical Distribution Patterns of Cyclopid copepods in Kotmale Reservoir

Chandrananda, W.P.N.; Piyasiri, S. (1992)

Vertical distribution of cyclopid copepcds was studied in Kotmale reservoir, in order to determine the variation in zooplankton at different depths. Their seasonal distribution and migratory patterns were also ...

Present Status of the Seine Fishery in Negombo Lagoon of Sri Lanka

Wijeyaratne, M.J.S.; Perera, W.M.D.S.K. (1992)

Studies on the seine fishery of Negombo Lagoon in the west coast of Sri Lanka (7°10' Nand 79°50' E) were carried out for a period of one year from May 1989 to April 1990. In the operation of this gear, 2 or 4 standard nets, ...

Population Structure and Polymorphism of Ceriodaphnia cornuta in Kotmale Reservoir

Chandrananda, W.P.N.; Piyasiri, S. (2013-03-01)

A study of zooplankton was carried out in Kotmale reservoir, from August 1990 to December 1991. Vertical and horizontal sampling was done once a month near the dam of the reservoir, between 1100 hours to 1200 hours. A ...

Mineral Nutrition of Cymbopogon nardus (L) Rendle: Part II. Effects of Magnesium and Phosphorus Nutrition on the Fractional Composition of Essential Oil

Ranaweera, S.S.; Thilakaratne, W.P. (1992)

Results obtained from a fertilizer experiment conducted with thirteen treatments indicate the positive effect of phosphorus and magnesium nutrition on the yield and the fractional composition of essential oil of ...

Mineral Nutrition of Cymbopogon nardus (L) Rendle: Part I. Effects of Magnesium and Phosphorus Nutrition on Growth and the Yield of Essential Oil

Ranaweera, S.S.; Thilakaratne, W.P. (1992)

A greenhouse pot experiment with thirteen treatments of fertilizers was conducted to examine the effects of phosphorus and magnesium on the growth of Cymbopogon nardus (L) Rendle (Ceylon citronella) and the yield of ...

Limnology Project at Mahaweli Reservoirs:II A Limnological Study at Kotmale, Victoria and Randenigala Reservoirs

Piyasiri, Swarna (1992)

The objective of this study was to collect basic data to ascertain status of Kotrnale, Victoria and Randenigala reservoirs and to understand the trophic evolution of the reservoirs. The transparency values changed with ...

Interrelationships among the Species of the Genus Puntius (Teleostei, Cyprinidae) as Indicated by the Meristic and Morphological Characters

Kotalawala, A.B.; Jinadasa, J. (1992)

Interrelationships among the Species of the Genus Puntius (Teleostei, Cyprinidae) as Indicated by the Osteology

Kotalawala, A.B. (1992)

The osteology of twelve species of Puntius based on a study of 3·43 specimens from each species is discribed. Study material ranging in size from 30 mm to 90 mm in standard length included cleared and stained specimens ...

Growth Assessment of Some Ornamental Fish Species Fed with Low Cost Feeds

Mahaulpatha, W.A.D.; De Alwis, A.; Jinadasa, J. (1992)

Three feeds were formulated using low cost raw materials with protein contents ranging from 44% - 62% and prepared in the laboratory and were tested against an imported feed (protein 32%) on young stages (initial ...

Fifty Years of Quality Technology

Dayananda, R.A. (1992)

Effects of Low Water pH on Some Heamatological and Physiological Parameters of Oreochromis mossambicus

Amarasinghe, I.C.; Attygalle, M.V.E. (1992)

In this study tolerance to acid water pollution and the effects of acid water pollution on some haematological and physiological parameters were investigated in Oreochromis mossambicus, a species of fish which is well ...

Effects of Foliar Application of Nitrogen and Molybdenum on the Uptake of Nitrogen, Seed Yield and Its Quality of Soybeans (Glycine max (L.) Merr.)

Ranaweera, S.S. (1992)

Effects of foliar nutrition of soybeans (cv.PB-I) with nitrogen and molybdenum on the seed yield and its quality are reported. Nitrogen uptake was positively affected by the foliar application of nitrogen. Foliar ...

A Preliminary Study of Some Aspects of Distribution of Phospholipids and Yield and Flow Properties of Hevea Latex

Kasinathan, S.; Yapa, P.A.J.; Balasubramanium, K. (1992)

The phospholipid content in various fractions obtained by high speed centrifugation of Hevea latex was studied. Distribution of phospholipid in latex as well as rubber of various clones of Hevea in relation to their ...

A Preliminary Study of Satellite Magnetic Anomalies over Sri Lanka and nearby Oceanic Regions

Tantrigoda, D.A.; Geekiyanage, P. (1992)

Satellite magnetic anomalies over Sri Lanka and nearby oceanic regions are inverted to obtain the crustal magnetization distribution of the region using the least-squares technique and the eigen-value decompostion ...

A Numerical Technique to Determine the Magnetization of a Two Dimensional Body

Tantrigoda, D.A. (1992)

A simple numerical technique that permits the determination of the magnetization of a two dimentional body, producing a magnetic anomaly as well as a gravity anomaly, is presented. This technique involves the comparison of ...

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Unknown author (1992)

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Volume 04 No. 01 July 1992: Recent submissions

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