Aq~c~lt~re, 61 (1987) 7540 Elsevier Science ~biishers B.V., Amsterdam - Printed in The Netherlands
Book Reviews HANDBOOK OF TROUT AND SALMON DISEASES
Handbook of Trout and Salmon Diseases. R.J. Roberts and C.J. Shepherd. Fishing News Books, Farnham, Great Britain, first published 1974, second edition 1986.230 pp., 143 illus., hard cover price s19.50 plus postage, ISBN O85238-238-7. This is the second edition of a handbook intended “for the practical trout and salmon hatcheryman, fish farmer, angler and resource manager” and has been considerably enlarged over the first edition with the addition of 54 pages and 25 illustrations. A comparison of the two editions provides clear evidence of the developments which have taken place in fish farming in Britain in the twelve years that separate them. Thus the new edition has a greatly expanded consideration of marine fish farming, with furunculosis in salmon replacing vibriosis as the most important disease in marine farming and the effects of toxic algal blooms now being regarded as being as significant a cause of acute fish kills as low oxygen levels or pollution. Separate chapters consider the different species of cultured salmonids, salmonid anatomy and husbandry. After a chapter reviewing infectious diseases by pathogen type and another describing methods of disease diagnosis that can be undertaken on a fish farm, diseases of eggs and sac fry, of early feeding fish, of growing fish in fresh water, of growing fish in sea water and of wild fish and brood-stock are considered separately. Although this inevitably means duplication of information where individual pathogens affect more than one stage of fish development, a practical emphasis is placed on the clinical picture seen in the different stages of culture. Finally there are chapters on nutritional diseases and on disease control techniques plus a brief consideration of acute fish kills. The drugs and vaccines described in the disease control chapter in the new edition compared with those in the first edition of this handbook again clearly reflect the changes and advances which have occurred in fish farming over the last twelve years. Vaccines are seen to be of markedly increased importance, potentiated sulphonamides and oxolinic acid have been added to the list of medicines, and methods for the application of topical medicines to fish in cage sites are now included. The book concludes with a brief appendix listing simple laboratory techniques. Inevitably some minor criticisms can be made. For example, in the instructions for the use of a microscope, the suggestion that the sun (rather than the sky) is a suitable light source for microscopes without a built-in light source has obvious dangers. In view of steady increase in the use of antimicrobial agents in fish farming, an increased emphasis on the need to observe drug
withdrawal periods would have been a welcome addition. There are now several texts on fish diseases aimed at graduate and postgraduate students. These tend to cover a wider field and go into greater detail than do Roberts and Shepherd and, although often competitive in price, are therefore less suitable for the practical fish husbandryman. For such a person this handbook provides a reasonably straightforward and practical coverage of salmon and trout diseases, their diagnosis and control. Minute
D.J. ALDERMAN of Agriculture, Fisheries & Food, Fish Diseases ~~oruto~, The Nothe, Weymouth, Dorset DT4 8UB (Great Britain)
FISH AND SHELLFISH PATHOLOGY
F&& and S~Z~f~~ ~ut~~ogy. Proceedings of the First International Conference of the European Association of Fish Pathologist. Anthony E. Ellis f Editor >. Academic Press, London, 1985.412 pp., JZ53.50 ($69.50)) ISBN O-12-237490-8.
This book is not an all-inclusive treatise on fish and shellfish pathology as the title implies, but a collection of papers presented at The First International Conference of the European Association of Fish Pathologists held at Plymouth, England in 1983. The editor has done an admirable job of organizing the book into eight sections composed of forty-two scientific papers. The first seven sections concern finfish and include (1) fish disease diagnostics, (2 ) treatment and control of fish diseases, (3 ) furunculosis, (4) bacterial diseases other than furunculosis, (5) environmental and nutritional diseases, (6) viral diseases, and (7) fungal and parasitic diseases. The final section includes six papers on the diseases of shellfish and their pathology. As with most collections resulting from conferences or symposia, the quality of the individual papers varies. The presentations in this book include insightful reviews, data resulting from specific experimental work, case histories, and fish health surveys. The section on fish disease diagnostics contains two papers, one which reviews the present status of diagnostic methods and then discusses current needs of fish pathologists. The other paper concerns ELISA and its use and current limitations as a diagnostic tool. Treatment and control of fish diseases is the second section and contains four papers. The requirements for drug registration are discussed and a plea