Browsing by Author "Costa, H.H."
Now showing 1 - 20 of 62
- Results Per Page
- Sort Options
Item Application of "yield per recruit" and "surplus yield" models to the grey mullet fishery in Negombo lagoon, Sri Lanka(Ministry of Fisheries, Sri Lanka, 1986) Wijeyaratne, M.J.S.; Costa, H.H.Item Atyidae of Ceylon-I(Journal of Crustaceana, 1962) Arudpragasam, K.D.; Costa, H.H.Item Avoidance of anoxic water by tadpoles of Rana temporaria(Journal of Hydrobiologia, 1967) Costa, H.H.Item Biological Studies of the Pearl Spot Etroplus suratensis (Pisces, Cichlidae) from three Different Habitats in Sri Lanka(International Review of Hydrobiology, 1983) Costa, H.H.Item Cave dwelling bats in Sri Lanka(Department of National Museums, Sri Lanka, 2004) Rubsamen, R.; Eckrich, M.; Costa, H.H.Item A comparative study of the morphometrics, gill rakers and food of a stunned and a non-stunned populations of Oreochromis mossambicus (Peters) from Colombo (Beira) lake and Udawalawe reservoir(Sri Lanka Association for Fisheries and Aquatic Resources, 1998) Epa, U.P.K.; Costa, H.H.Item Composition, abundance and distribution of aquatic Oligochaeta in Colombo (Beira) Lake(Sri Lanka Association for Fisheries and Aquatic Resources, 1996) Weerasundara, G.A.; Pathiratne, A.; Costa, H.H.Item The distribution of Anostraca and Conchostraca (Crustacea) in the Jaffna Peninsula(The Fisheries Research Station, 1979) Selvarajah, N.; Costa, H.H.Item The ecology and distribution of free-living Meso and Macrocrustacea of inland waters(Journal of Ecology and Biogeography in Sri Lanka, 1984) Costa, H.H.Item Effect of crowding, food quality and body size on food utilization of Pomacea canaliculata (Lamarck), (Gastropoda: Ampullaridae), an introduced potential snail pest of the rice paddy in Sri Lanka(Sri Lanka Association for Fisheries and Aquatic Resources, 1998) Kumara, P.A.D.A.; Costa, H.H.Item Effect of crowding, food quality and body size on food utilization of the exotic snail, Pomacea canaliculata (Lamarck), a potential pest of rice in Sri Lanka(Sri Lanka Association for Fisheries and Aquatic Resources, 1999) Kumara, P.A.D.A.; Chandrasekera, L.W.H.U.; Costa, H.H.Item The effect of exercise on the survival of Phoxinus phoxinus L. in sodium cyanide solutioins(Journal of Hydrobiologia, 1966) Costa, H.H.Item Effects of some common insecticides and other environmental factors on the heart beat of Caridina pristis(Journal of Hydrobiologia, 1970) Costa, H.H.Item The Effects of Some Heavy Metal Pollutants on the Heart Beat of Gammarus Pulex (L.)(Journal of Crustaceana, 1980) Costa, H.H.Item Epidemiology of the epizootic ulcerative syndrome occurring for the first time among fish in Sri Lanka(Willey Online, 1989) Costa, H.H.; Wijeyaratne, M.J.S.Item An experimental study on the culture of fry of Oreochromis mossambicus (Peters) in a peaty swamp in Sri Lanka using cow dung and poultry manure as fertilizer(International Symposium on Recycling of Organic Wastes for Fertilizer, Food, Feed and Fuel, Hong Kong, 1986) Costa, H.H.; Keembiahetty, C.N.Item Fishery, seasonal abundance and mortality of grey mullets (Pisces; Mugilidae)in Negombo lagoon, Sri Lanka(Wiley Online Library, 1987) Wijeyaratne, M.J.S.; Costa, H.H.Item The Food and Feeding Chronology of Yellow Perch (Perca flavescens) in Lake Washington(International Review of Hydrobiology, 1979) Costa, H.H.Item FOOD AND FEEDING OF TWO SPECIES OF GREY MULLETS VALAMUGIL BUCHANANI (BLEEKER)AND LIZA VAIGIENSIS QUOY AND GAIMARD INHABITING BRACKISHWATER ENVIRONMENTS IN SRI LANKA(Indian Council of Agricultural Research, 1990) Wijeyaratne, M.J.S.; Costa, H.H.Item The food of the tadpoles of Rhacophorus cruciger cruciger (Blyth)(National Science Foundation of Sri Lanka, 1965) Costa, H.H.; Balasubramaniam, S.