Science
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Item Atyidae of Ceylon-I(Journal of Crustaceana, 1962) Arudpragasam, K.D.; 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.Item Responses of freshwater animals to sodium cyanide solutions(National Science Foundation of Sri Lanka, 1965) Costa, H.H.Item Responses of Gammarus Pulex (L.) To Modified Environment(Journal of Crustaceana, 1966) 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 Avoidance of anoxic water by tadpoles of Rana temporaria(Journal of Hydrobiologia, 1967) Costa, H.H.Item Responses of Gammarus Pulex (L.) To Modified Environment Iii. Reactions to Low Oxygen Tensions(Journal of Crustaceana, 1967) Costa, H.H.Item Responses of Gammarus pulex (L.) to Modified Environment II. Reactions to Abnormal Hydrogen Ion Concentrations(Journal of Crustaceana, 1967) 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 A comparative study of the food and feeding habits of Puntius Bimaculatus and P.Titteya (Pisces, Cyprinidae)(brillonline.com, 1976) de Silva, S.S.; Kortmulder, K.; Wijeyaratne, M.J.S.Item Studies on the biology of young grey mullet, Mugil cephalus L.(FAO of United Nations, Rome, Italy, 1976) de Silva, S.S.; Wijeyaratne, M.J.S.Item Studies on the biology of young grey mullet, Mugil cephalus L. II. Food and Feeding(Science Direct, 1977) Wijeyaratne, M.J.S.; de Silva, S.S.Item The distribution of Anostraca and Conchostraca (Crustacea) in the Jaffna Peninsula(The Fisheries Research Station, 1979) Selvarajah, N.; Costa, H.H.Item Some Chemical Characteristics of Fresh and Salt-Dried Tilapia mossambica Peters(Journal of National Science Council, Sri Lanka, 1979) de Silva, S.S.; Rangoda, M.Item Some Chemical Characteristics of Fresh and Salt-Dried Tilapia mossambica Peters(National Science Council of Sri Lanka, 1979) de Silva, S.S.; Rangoda, M.Item Fish Fauna of a coastal lagoon in Sri Lanka: Distribution and seasonal variation(The Fisheries Research Station, 1979) de Silva, S.S.; Silva, E.I.L.Item The Food and Feeding Chronology of Yellow Perch (Perca flavescens) in Lake Washington(International Review of Hydrobiology, 1979) Costa, H.H.Item Studies on the fish ponds at Pitipana, Negombo 1. Seasonal and diurnal variation of some hydrobiological factors(The Fisheries Research Station, 1979) de Silva, S.S.; Silva, E.I.L.Item The Effects of Some Heavy Metal Pollutants on the Heart Beat of Gammarus Pulex (L.)(Journal of Crustaceana, 1980) Costa, H.H.Item Results of the Austrian Hydrobiological Mission, 1974, to the Seychelles-, Comores- and Mascarene-Archipelagos: Part III: The Ecology and the Distribution of Decapoda Caridea in the Indian Ocean Islands of Seychelles, Mauritius, Comores & Réunion(Annalen des Naturhistorischen Museums, 1980) Costa, H.H.