A technique for assessing the composition and density of the macroinvertebrate fauna of large stones in streams T. DoegP. S. Lake OriginalPaper 01 April 1981 Pages: 3 - 6
Species composition, abundance and emergence phenology of midges (Deiptera: Chironomidae) in a brown-water stream of West-Central Alberta, Canada Hans Boerger OriginalPaper 01 April 1981 Pages: 7 - 30
Factors influencing fish distribution in two desert reservoirs, Central Arizona John N. RinneW. L. MinckleyP. O. Bersell OriginalPaper 01 April 1981 Pages: 31 - 42
The use of inorganic substances to stimulate gut evacuation in Daphnia magna Moshe GophenBonnie Gold OriginalPaper 01 April 1981 Pages: 43 - 45
Chemisty of lake water and groundwater in areas of contrasting glacial drifts in Eastern Minnesota Richard B. Brugam OriginalPaper 01 April 1981 Pages: 47 - 62
Grazing rate determination of Corynoneura scutellata Winnertz (Chironomidae: Diptera) David H. Kesler OriginalPaper 01 April 1981 Pages: 63 - 66
Periphyton algae and bacteria from springs of Levadia Boeotia, Greece Athina Economou-AmilliKonstantinos Anagnostidis OriginalPaper 01 April 1981 Pages: 67 - 89
Effects of ion-pairing on calculations of ionic activities of major ions in freshwater Claude E. Boyd OriginalPaper 01 April 1981 Pages: 91 - 93
