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Juday, Chancey (ed.) / Transactions of the Wisconsin Academy of Sciences, Arts and Letters
volume XXI (1924)

Baker, Frank Collins
The fauna of the Lake Winnebago region,   pp. [109]-146 PDF (11.3 MB)


Page 129


Baker-The Fauna of The Lake Winnebago Region.       129
  Associated animals a- little more than equal the mollusks in
abundance. They include a number of genera divided among
fourteen higher groups. Two groups make up 65 per cent of the
total, Hyalella, 43 per cent and Chironomid larvae 22 per cent.
Caenis occurred at 2 and 3.4 meters and Hexagenia was found on
a mud bottom in 1 to 3.4 meters. Enallagma and Anax junius
were included among Odonata, both rare. Nymphula was rare at
all but one station. Plea striola, adult and nymph, was not un-
common.   Trichoptera included Agraylea, Leptocella, Helico-
psyche, Molanna, and Polycentropidae, which were not found
deeper than 1.5 meters. Among Coleoptera, Bidessus flavicollis,
Stenelmvus bicarrinatus, Donacia proxima, and a Dascyllid larva
occurred uncommonly in shallow water (1 meter) excepting
Donacia which was found at 3 meters. The mites were very rare
and included Hydrachna, Limnesiopsis, and Unionicola, mostly in-
habitants of shallow water. Four species of leeches occurred in
the deepest water on mud and sand bottom, Glossiphonia stagnalis,
nepheloidea, fusca, Erpobdella punctata.
  'The vegetation population of this lake is large but not particu-
larly varied. Only thirteen species of mollusks, of which Bythinia,
Amnicola limosa, and Ferrissia parallela form about 79 per cent,
were collected from plants as compared with 25 species in Lake
Winnebago.
  Among associated animals, Ilyalella and Chironomid larvae
-make up56 andM pe cent respetivl Y but aeotherwisejpoorly-
represented. At one station (93) the filamentous algae were fairly
alive with Hyalella and Chironomid larvae. The genera repre-
sented in the vegetation include Plea striola and Belostoma
nymphs; Hexagenia nymphs; Enallagma nymph; Agraylea, Heli-
copsyche, Leptoceridae larvae; Nymphula larva; Donacia proxima,
Bidessus flavicollis, B. affinis, Dytiscid larva; Hydracna, Lim-
nesia; Asellus intermedius; Plumatella polymorpha; Hydra oligac-
tis, and Glossiphonia and Erpobdella.
                   Fox RivER (Table 1).
  Dredgings were made near Omro, the maximum depth found be-
ing 2.9 meters. The bottom is of mud, sand, clay, or gravel, mud
occurring in all protected places. Gravel occurred near Omro in
water 2.9 meters deep in which three species of Naiades were
found. The shores of the river are swampy for the most part, low,


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