Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

One green alga of the genus StigeocZonium was present in some numbers
but was not a dominant. There was no Cladophora present.
The Periphyton-Collector Problem. Two different designs of bottommounted periphyton collectors have failed to survive the inshore environment
at the Cook Plant.
The brute-strength approach having been unsuccessful, we are going to use
collectors of a design recommended by James Truchan of the Michigan Water
Resources Commission's Water Quality Appraisal Section. These collectors
will be screw-anchored to the bottom, will present collecting surfaces near
the water surface, and will yield to wave action. We anticipate that these
collectors can be set in April.
A.5 Study of Zooplankton
The results of zooplankton studies to date are sparse, but to get them
into the record as data antecedent to the detailed biological surveys they
have been assembled and are reported here.
Minor computational errors in the data of 25 April 1969 have been
corrected in Table 8. Table 9 presents the zooplankton collected in our
three occupations of the station 1 mile off the Cook site during the Lake
Michigan Environmental Surveys.
Through 1970 our zooplankton collections have been made with metered
#5 plankton nets. Because this net has a mesh sufficiently large to allow
the escape of the smaller zooplankters, the smaller-mesh #10 net will be
used routinely in the future.
A.6 Study of Aquatic Macrophytes
On 13 October 1970 the bottom off the Cook Plant site was surveyed for

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