Experiment 1—effect of temperature
Five tanks of 0.25m2 surface were used, each containing 30
tadpoles with an average initial weight of 0.04g in 25l of water.
All parameters were stabilised, except the water temperature
which ranged from 22 to 30 °C with a difference of 2 °C between
each tank due to the use of five aquarium heaters. All received the
same rationof fish pelletsattaining40%crudeprotein.The
experiment took place at low density (120 m2) and was discon-
tinued after 12 weeks when the majority of tadpoles had
metamorphosed.