Variations in the abundance of channel catfish year classes in the upper Mississippi River and causative factors
By: Don R. Helms.
Contributors: Iowa Conservation Commission. Fisheries Section
Series: Iowa fisheries research technical series -- 75-1
Publisher: State Conservation Commission, Fisheries Section
Published: 1975
Place of publication: Des Moines
Language: eng
Number of pages: 31
Subjects: Channel catfish -- Mississippi River.; Fishes -- Reproduction.; Fish populations.; Fishes -- Mississippi River.
Notes: Includes bibliographical references (leaves 30-31).