References
- Lall , S. P. 1989 . Fish Nutrition, , Edited by: Halver , J. E. 219 – 257 . San Diego : Academic Press .
- da Silva , J. J. R. F. and Williams , R. J. P. 1991 . The Biological Chemistry of the Elements. , Oxford : Clarendon Press .
- Opperhuizen , A. 1991 . Bioaccumulation in Aquatic Systems, , Edited by: Nagel , R. and Loskill , R. 67 – 80 . Weinheim : VCH .
- Lauwerys , R. 1978 . Critical (dose/effect relationships) for Cadmium. , Oxford : Pergamon Press .
- Cherian , M. G. and Goyer , R. A. 1989 . Comments Toxicol. , 3 : 191 – 206 .
- Gale , N. , Wixson , B. G. , Hardie , M. G. and Jennett , J. C. 1973 . Aquatic organisms and heavy metals in Missouri's new lead belt . American Water Resources Association Conference . 1973 .
- Rolfe , G. L. and Jennett , J. C. 1975 . Heavy Metals in the Aquatic Environment, , Edited by: Krenkel , P. A. London : Pergamon Press .
- WHO . 1989 . Mercury‐environmental aspects , Environmental Health Criteria 86 Geneva : World Health Organisation .
- Martinelli , L. A. , Ferreira , J. R. , Forsberg , B. R. and Victoria , R. L. 1988 . Ambio. , 17 : 252 – 254 .
- Friberg , L. , Piscator , M. , Nordberg , G. F. and Kjellstrom , T. 1976 . Cadmium in the Environment, , Cleveland : CRC Press .
- McDowell , L. R. 1992 . Minerals in Animal and Human Nutrition , San Diego : Academic Press .
- Coche , A. G. , Pullin , R. S. V. and Lowe‐McConnell , R. H. 1982 . The biology and culture of tilapias , Manila : ICLARM .
- Hepher , B. and Pruginin , Y. 1982 . The biology and culture of tilapias , Edited by: Pullin , R. S. V. and Lowe‐McConnell , R. H. Manila : ICLARM .
- Hendricks , J. D. and Bailey , G. S. 1989 . Fish Nutrition, , Edited by: Halver , J. E. 605 – 651 . London : Academic Press .
- Balarin , J. D. and Hatton , J. P. 1981 . Tilapia: A guide to their biology and culture in Africa , Stirling : University of Stirling .
- Hutagalung , H. P. 1989 . Bull. Environ. Contam. Toxicol. , 42 : 814 – 820 .
- Mance , G. 1987 . Pollution Threat of Heavy Metals in Aquatic Environments, , London : Elsevier Applied Science Publishers .
- Sorensen , E. M. B. 1991 . Metal Poisoning in Fish, , Boca Raton : CRC Press .
- Steel , R. G. D. and Torrie , J.H. 1960 . Principles and Procedures of Statistics, , London : McGraw‐Hill Book Company, Inc. .
- Noel‐Lambot , F. , Gerday , F. and Disteche , A. 1978 . Comp. Biochem. Physiol. , 61 : 177 – 187 .
- Panigrahi , A. K. and Misra , B. N. 1980 . Arch. Toxicol. , 44 : 269 – 278 .
- Cyriac , P. J. , Antony , A. and Nambisan , P. N. K. 1989 . Bull. Environ. Contam. Toxicol. , 43 : 315 – 320 .
- Ruparelia , S. G. , Verma , Y. , Saiyed , S. R. and Rawal , U. M. 1990 . Bull. Environ. Contam. Toxicol , 45 : 305 – 312 .
- Oladimeji , A. A. and Offem , B. O. 1989 . Water Air Soil Pollut. , 44 : 191 – 201 .
- Valkovic , V. 1975 . Trace Element Analysis, , London : Taylor and Francis Ltd. .
- Pinta , M. 1978 . Modern Methods for Trace Element Analysis, , Michigan : Ann Arbor Science Publishers Inc. .
- Van Loon , J. C. 1985 . Selected Methods of Trace Metal Analysis: Biological and Environmental Samples, , New York : John Wiley and Sons .
- Stirling , H. P. 1985 . Chemicals and biological methods of water analysis for aquaculturists , Edited by: Stirling , H. P. 60 – 64 . Stirling : Institute of Aquaculture .
- Zar , J. H. 1984 . Biostatistical Analysis, , London : Prentice‐Hall International Inc. .
- Samuels , M. L. 1989 . Statistics for the Life Sciences, , San Francisco : Dellen Publishing Co. .
- Siegel , S. and Castellan , N. J. 1989 . Nonparametric Statistics for the Behavioural Sciences, , New York : McGraw‐Hill .
- Ewers , U. 1991 . Metals and Their Compounds in the Environment , Edited by: Merian , E. 687 – 711 . Weinheim : VCH .
- Maage , A. 1990 . Bull. Environ. Contam. Toxicol. , 44 : 770775
- Tacon , A. G. J. and De Silva , S. S. 1983 . Aquaculture , 31 : 60 – 64 .
- Phillips , G. R. and Russo , R. C. 1978 . Metal bioaccumulation in fishes and aquatic invertebrates: A literature review , Duluth, Minnesota : Environmental Research Laboratory .