A field experiment about larval density regulation in frogs. The pond is divided by a plastic, tadpole proof fence. Spawn is redistributed to create high and low (tadpoles) density sections and the performance of the tadpoles monitored 1990 to 1997. Some results are available in report #18.

A field experiment about adult density regulation in frogs. Four 30*30 m areas are fenced in on a moist meadow. Adult frog density was manipulatied in these during four summers and the effect on frog growth monitored. The study is not yet compiled.

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