• The Species Composition, Abundance and the Distribution of Seagrass Communities in Puttalam Lagoon 

  Jayasuriya, P.M.A. (1991)

  The species composition, abundance and the distribution of different seagrass beds of Puttalam lagoon have been investigated. Eight species belonging to six genera were recorded during the investigation i.e., Enhalus ...
• The Distribution and the Species Composition of the Existing Mangrove Vegetation around Chilaw Lagoon 

  Jayasuriya, P.M.A. (1991)

  The distribution pattern, species composition, zonation and the abundance of the mangrove communities around Chi/aw lagoon were studied. 15 typical mangrove species and 13 mangrove associates were listed. Quadrat sampling ...
• Preliminary Observations on the Purse Seine Fishery in the South-west Coast of Sri Lanka 

  Dayaratne, Pauline (1991)

  Purse seine fishing in the south west coast of Sri Lanka became popular since 1982 and the number of boats increased to about 29 in 1984. In 1987 there were around 50 purse seiners operating in this region. A study of ...
• Marsh Vegetation of Muthurajawela 

  Herat, Tissa R. (1991)

  Biologically marshes are among the richest, most productive ecosystems known and among the most interesting. Muthurajawela marsh is one such wet land which has a great effect on maintaining the proper ecological balance ...
• Interrelationships among Genera of Cyprinidae (Teleostei) as Indicated by the Caudal Skeleton 

  Kotalawala, A.B. (1991)

  The studies on the osteology of caudal skeleton and the ray counts showed that the twenty one species of Cyprinidae studied fall into three groups, one containing four species, the other with 16 species and third group ...
• Hypotensive Activity of Crude Extract of Marine Red Alagae, Gracilaria sp. in Rats 

  Ratnasooriya, W.D.; Premakumara, G.A.S.; Tillekeratne, L.M.V. (1991)

  Hypotensive properties of the crude extract of Sri Lankan marine red algae Gracilaria sp. of the family Gracilaracea were investigated on anaesthetized rats using two doses (250 or 500mg/kg) given intraperitoneally. The ...
• Genetically Engineered Bacillus thuringiensis Var-israelensis (bti) for the Biological Control of Mosquito-A Review 

  Nandadasa, H.G. (1991)

  The number of pathogenic microorganisms that are capable of killing insect pests is extremely large. Some bacteria are more attractive to researchers developing microbial biological control agents because their genomes ...
• Food and Feeding Habits of the Mud Crab, Scylla serrata Forskal Inhabiting the Negombo Lagoon in the West Coast of Sri Lanka 

  Jayamanne, S.C.; Jinadasa, J. (1991)

  The Mud crab, Scylla serrata is an economically important crustacean. inhabiting the lagoons of the west coast of Sri Lanka. Currently there is interest in mass rearing of the species in ponds. Thus, a study was carried ...
• Effect of Methanolic Extract of Abrus precatorius Seeds on Fertility of Female Rats 

  Ratnasooriya, W.D.; Amarasekara, A.S.; Ananda, U.V.D.S. (1991)

  This study examines the post-coital contraceptive potential of a methanolic extract of Abrus precatorius seeds using albino rats. The major constituent of this extract was found to be abrin, an amino acid derivative (68 ...
• Contents 

  Unknown author (1991)
• An Investigation into the Effect of Monocultural Plantation of Eucalyptus camaldulensis on Soil Fertility Status 

  Ranasinghe, D.M.S.H.K.; Jayasuriya, A.W.A. (1991)

  The effect of Eucalyptus camaldulensis monoculture on soil fertility status in the dry zone was studied comparatively with another monoculture of Tectona grandis and a naturalforest located in the same area over a period ...
• A Preliminary Investigation on the Handline Fishery in the West Coast of Sri Lanka 

  Dayaratne, P.; Amarasiri, C. (1991)

  A preliminary analysis of the handline fishery in Negombo is presented. The fishery is carried out along the continental shelf edge with the depth range of 10-20 fathoms and within the distance of 20 miles from the coast. ...
• A Mathematical Model of Drug Therapy 

  Epasinghe, P.W. (1991)

  A problem discussed by Burghes, Huntley and McDonald (1, pages 124- 129) relating to Drug Therapy is shown to be a very critical case of a general formulation of the problem. It is also shown that their prescription to ...

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