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""" This book has been written as a guide to the management and use
of formulated feeds in intensive fish and shrimp culture. While its
focus is on the use of commercially pro duced feeds in intensive
production systems, it is anticipated that many of the practical
issues covered will be of equal interest to those fish farmers who
make their own feeds and to those who use formulated feeds in less
intensive systems. Feeds and feeding are the major variable
operating costs in intensive aquaculture and the book is primarily
in tended to aid decision making by fish farm managers in areas of
feeding policy. The dramatic increases in aquaculture production
seen over the past 15 years have been made possible, in large part,
by gains in our understanding of the food and feed ing requirements
of key fish and shrimp species. A global aquaculture feeds industry
has developed and a wide range of specialist feeds is now sold. The
new options in feeds and feeding systems, which are becoming
available, necessitate continual review by farmers of their feeding
policies, where choices must be made as to appropriate feed types
and feeding methods. While growth rates and feed conversion values
are the prime factors of interest to farmers, other important
issues, such as product qualiry and environmental impacts of farm
effluents, are also directly related to feed management practices."
This is the candid and often colourful account of the personal
experiences of a resource analyst; experiences that led to major
contributions in the modelling and forecasting of petroleum
discovery rates and of potential oil and gas supply. The author's
approach is largely nontechnical. He relates the difficulties
encountered in integrating geoscience, economics, and statistics,
and stresses the value of critically examining data before
formulating theories or building formal models.
The United States Geological Survey (USGS) is a scientific
organization created in 1879, and is part of the U.S. government.
Their scientists explore our environment and ecosystems, to
determine the natural dangers we are facing. The agency has over
10,000 employees that collect, monitor, and analyze data so that
they have a better understanding of our problems. The USGS is
dedicated to provide reliable, investigated information to enhance
and protect our quality of life. This is one of their circulars.
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