E. O. OYEWO AND K. N. DON–PEDRO

Acute toxicity and bio-accumulation of mercury and copper in Clibanarius africanus (Aurivillius) and Tympanotonus fuscatus (Linne) 

75

Abstract

J. A. ADAKOLE AND P. A. ANUNNE

Benthic macroinvertebrates as indicators of environmental quality of an urban stream, Zaria, Northern Nigeria 

85

Abstract

J. N. OGBULIE, I. O. C. OBIAJURUAND T. E. OGBULIE

Bacterial and helminth bioload of cultured Channa obscura fish 

93

Abstract

E. OMOREGIE, M. N. O. AJIMA AND I. R. KEKE

Effects of sub-lethal concentrations of NPK (15:15:15) fertilizer on growth and feed utilization by the toothed carp Aphyosemion gairdneri under laboratory conditions 

101

Abstract

J. N. Ogbulie AND I. O. COBiAJURU

Bacteriological water quality changes and substratespecificity of isolates associated with Clarias lazera culture system 

105

Abstract

T. O. T. IMOOBE

Freshwater Ostracoda from Jamieson River, Niger Delta Region, NIGERIA  

113

Abstract

B. A. FALAYI, A. M. BALOGUN, O. T. ADEBAYO, C. T. MADU AND A. A. EYO

Leaching of feed nutrients, economic losses to fish farming  

119

Abstract

F. DADDY, B. M. B. LADU, F. D. BEED, Y. A. BIRNIN-YAURI AND S. OWOTUNSE

Surveillance of potential pathogenic fungi associated with water hyacinth in Lake Kainji, Nigeria 

125

Abstract

C. E. MBAH, I. H. NOCK AND C. G. VAJIME

Laboratory rearing and distribution of the breeding sites of simulium species in Kaduna State 

131</