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The success of the previous volumes in this series attests to the
buoyancy of the current expansion of the aquaculture industry, and
the importance which it is beginning to achieve in the rural
economies of many developed countries as well as those less
favoured. In the last volume, emphasis was given to certain
specialist areas which had become more important as the industry
had acquired a more sophisti cated scientific base. This emphasis
is continued, but in each of the chapters of the present volume
there are, we believe, many data of general significance to the
farmer and the project manager as well as to the pro fessional
aquaculture scientist. David Alderman, of the English Ministry of
Agriculture, Fisheries and Food Laboratories, at Weymouth, Dorset,
provides a very detailed and deeply researched review of therapy of
fish diseases. This subject is import ant in environmental and
human health terms as well as in relation to the fish themselves,
and is an area where all farmers, and their professional veterinary
advisers, require considerable knowledge if they are to ensure the
reputation of the industry and its produce."
with the issues involved in the management of salmon fishing.
farming and ranching and the implications for production costs and
the availa bility of supplies. Chapters 6 and 7 investigate
processing. marketing and distribution and Chapter 8 discusses the
workings of salmon markets and the main factors affecting the
demand for salmon. Finally. chapter 9 summarises the main findings
of the study and considers the issues likely to define the future
of the industry. The main interest of the book is in salmon sold
commer cially and mention is only made in passing of the rather
different. though important. issues involved in the management of
sport or recreation fisheries. This book does not cover all species
of salmon but concentrates on the main species of current
commercial significance. These are the five commercially important
species of Pacific salmon all of which belong to the single
separate genus ONCORHYNCHUS together with SALMO SALAR. the Atlantic
salmon. The related SALMO GAIRDNERI (rainbow trout) and SALMO
TRUTTA (brown troutl seatrout) are outside the scope of the book.
although since these compete closely with salmon. the relationship
is discussed. 1.2 THE SALMON: LIFE CYCLE AND SPECIES The family
salmonidae is indigenous to the Northern Hemisphere and is found
from the temperate zone northwards to beyond the Arctic Circle. 1n
both Pacific and Atlantic waters. They are not. native to the
Southern Hemisphere but have been successfully introduced into New
Zealand. into Argentina. Venezuela and more recently Chile and the
Kerguelen Islands."
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