What Affects Heart Rate In Daphnia?

What Affects Heart Rate In Daphnia? Three commonly tested agents are nicotine, caffeine, and ethyl alcohol. Scholarly, peer-reviewed reports of how these compounds affect heart rate in Daphnia are scant. How does temperature affect heart rate in Daphnia? Acclimation of the waterflea Daphnia magna Straus (Crustacea: Cladocera) at 2 o to 12 o C above