Allozymic variability in toxicity‐testing strains of ceriodaphnia dubia and in natural populations of Ceriodaphnia, Thomas P. Snyder, Kristen M. Switzer, Robert Keen
Michigan Tech Publications

Vertical Migration, Hatching Rates, and Distribution of egg stages in Freshwater Zooplankton, Robert Keen
Michigan Tech Publications

Confidence intervals for birth and death rates estimated with the egg‐ratio technique for natural populations of zooplankton, Robert Keen, Raja Nassar
Michigan Tech Publications

Effects of Fluctuating Temperature on Duration on Egg Development of Chydorus sphaericus (Cladocera, Crustacea), Robert Keen
Michigan Tech Publications