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Browsing by Author Costa, H.H.
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Showing results 1 to 20 of 62
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Issue Date
Title
Author(s)
1986
Application of "yield per recruit" and "surplus yield" models to the grey mullet fishery in Negombo lagoon, Sri Lanka
Wijeyaratne, M.J.S.
;
Costa, H.H.
1962
Atyidae of Ceylon-I
Arudpragasam, K.D.
;
Costa, H.H.
1967
Avoidance of anoxic water by tadpoles of Rana temporaria
Costa, H.H.
1983
Biological Studies of the Pearl Spot Etroplus suratensis (Pisces, Cichlidae) from three Different Habitats in Sri Lanka
Costa, H.H.
2004
Cave dwelling bats in Sri Lanka
Rubsamen, R.
;
Eckrich, M.
;
Costa, H.H.
1998
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
Epa, U.P.K.
;
Costa, H.H.
1996
Composition, abundance and distribution of aquatic Oligochaeta in Colombo (Beira) Lake
Weerasundara, G.A.
;
Pathiratne, A.
;
Costa, H.H.
1979
The distribution of Anostraca and Conchostraca (Crustacea) in the Jaffna Peninsula
Selvarajah, N.
;
Costa, H.H.
1984
The ecology and distribution of free-living Meso and Macrocrustacea of inland waters
Costa, H.H.
1998
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
Kumara, P.A.D.A.
;
Costa, H.H.
1999
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
Kumara, P.A.D.A.
;
Chandrasekera, L.W.H.U.
;
Costa, H.H.
1966
The effect of exercise on the survival of Phoxinus phoxinus L. in sodium cyanide solutioins
Costa, H.H.
1970
Effects of some common insecticides and other environmental factors on the heart beat of Caridina pristis
Costa, H.H.
1980
The Effects of Some Heavy Metal Pollutants on the Heart Beat of Gammarus Pulex (L.)
Costa, H.H.
1989
Epidemiology of the epizootic ulcerative syndrome occurring for the first time among fish in Sri Lanka
Costa, H.H.
;
Wijeyaratne, M.J.S.
1986
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
Costa, H.H.
;
Keembiahetty, C.N.
1987
Fishery, seasonal abundance and mortality of grey mullets (Pisces; Mugilidae)in Negombo lagoon, Sri Lanka
Wijeyaratne, M.J.S.
;
Costa, H.H.
1979
The Food and Feeding Chronology of Yellow Perch (Perca flavescens) in Lake Washington
Costa, H.H.
1990
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.
1965
The food of the tadpoles of Rhacophorus cruciger cruciger (Blyth)
Costa, H.H.
;
Balasubramaniam, S.