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NATIONAL OCEANOGRAPHIC PROGRAM—1965 379 
c. Laboratory tests are run on a number of these organisms. 
Samples are collected from a number of lakes to determine changes in bottom 
fauna, Chemical and physical measurements are made at the same time, 
11. ‘he identification and Determination of organic substances, 
particularly pesticidesand oils, in fish and surface waters. 
a, Charles S. Myers, Division of Sanitary Engineering, 
Pennsylvania Department of Health. 
b. Determine deleterious effects of pesticides and oils upon 
fish. 
c. A number of organic compounds have been isolated from 
Pennsylvania streams feeding the Great Lakes. These are being studied, with 
special attention being given to pesticides and odor producing substances. 
Oils and gasolines found on the surface and underground waters are also being 
identified. The effects of the toxic effects of many of these compounds are 
being studied on fish. 
13. &ffect of paper-fibre waste on fish eggs and juvenile fishes. 
a. Dr. Lloyd L. Smith, Department of Entomology, Fisheries 
and Wildlife, University of Minnesota and others. 
b. To study fish egg mortality rates in contaminated stream 
areas. 
ec. Influence of varying wood-fibre loads on minnows and walleye 
pike at different levels of temperature and oxygen content is being studied 
through measurement of blood characteristics and mortality rates. Influence 
of gas toxins evolved from sludge mats is being determined on fish and 
invertebrates. 
1h. Investigation of biological control of snails. 
a. Dr. Clifford O. Berg, Professor of Limnology, New York 
State College of Agriculture at Cornell University. 
b. To gain understanding of the natural history and morphology 
of snail flies in the Great Lakes area. 
c. Laboratory and field testing is being carried out to find 
species for introduction to problem areas. Biotic potentials are being 
evaluated of these species and their chances of survival and multiplication 
in Great Lakes environmental conditions. 
