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Document Type

Research

Abstract

A five year survey was made of the gastropods of Lake West Okoboji, Iowa. Only 11 species comprise the present fauna, a remnant of what was earlier in this century several times larger. These species are: Amnicola limosa (Say), Amnicola lustrica Pilsbry, Ferrissia rivularis (Say), Gyraulus parvus (Say), Helisoma trivolvis (Say), Lymnaea reftexa Say, Lymnaea obrussa Say, Menetus exacuous (Say), Physa gyrina Say, Physa sayii Tappan, and Valvata tricarinata (Say). These are now confined to areas less than 10 meters in depth with numbers of species and densities much greater in the bays than in the main body of the lake. Other pertinent ecological data are noted.

Publication Date

1960

Journal Title

Proceedings of the Iowa Academy of Science

Volume

67

Issue

1

First Page

569

Last Page

577

Copyright

© Copyright 1960 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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