Browsing Research Articles Collection by Author "Costa, H.H."

Now showing items 1-14 of 14

The effects of leaving central bare areas in traditional circular brushparks on the yield of fish in the brushpark fishery in Negombo estuary, Sri Lanka (RP0072)

Costa, H.H.; wijeratne, M.J.S. (Japan: Ecoset, 1995)
Effects of some common insecticides and other environmental factors on the Heart Beat of Caridina pristis (RP0062)

Costa, H.H. (W.Junk, 1970)
The effects of some heavy metal pollutants on the heat beat of Gammarus Pulex (L) (RP0069)

Costa, H.H. (1980)
An experimental study on the culture of fry of Oreochromis mossambicus (Peters) in a peaty swamp in Sri Lanka using cowdung and poultry manure as fertilizer RP0059)

Costa, H.H.; Keembiahetti, C.N. (Elsevier, 1987)
Fecundity, morphometry, post embryonic growth and development of Caridina simoni bouvier (Decapoda : Atyidae)

Weerakkody, J.S.; Costa, H.H. (NARA, 1984)
Food and feeding of two species of grey mullets Valamugil buchanani (Bleeker) and Liza vaigiensis Quoy and Gaimard inhabiting brackishwater environments in Sri Lanka.

Wijeyaratne, M.J.S.; Costa, H.H. (1990)
Hydrobiology and fish production potential of major freshwater reservoirs in Hambantota district

Daniel, D.J.; Costa, H.H.; Wijayaratne, M.J.S. (MF, 1998)
The hydrobiology and fish production potential of major freshwater reservoirs in Hambantota district Sri Lanka

Daniel, D.J.; Costa, H.H.; Wijayaratne, M.J.S. (MF, 1988)
Land-based sources on marine pollution in Sri Lanka (RP0071)

Costa, H.H. (The Pensylvania Academy of Science, 1994)
Limnology and fish production potential of major freshwater reservoirs in Anuradhapura District

Amarasinghe, U.S.; Costa, H.H.; Wijayaratne, M.J.S. (MF, 1983)
The morphometrics and the proximate composition of the edible fresh water mussel Lamellidens lamellatus (Lea) from Bathalagoda Tank, a man made reservoir in Sri Lanka

Costa, H.H.; Indrasena A., W.M. (NARA, 1984)
Species composition, abundance and distribution of aquatic Oligochaetes in Colombo (Beira) lake, Sri Lanka(RP0070)

Costa, H.H.; Weerasundara, G.A.; Pathirana, A. (Colombo:SLAFAR, 1997)
The susceptibility and resistence of fry and fingerlings of Oreochromis mossambicus Peters to some pesticides commonly used in Sri Lanka (RP0060)

Shafiei, T.M.; Costa, H.H. (Hamburg: Verlag Paul Parey, 1990)
A systematic study of freshwater oligochaeta from Ceylon (RP0063)

Costa, H.H. (1967)

Browsing Research Articles Collection by Author "Costa, H.H."

Browsing Research Articles Collection by Author "Costa, H.H."

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