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Modelling the extinction risk of isolated populations of natterjack toad Bufo calamita

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Figure

Table 1. Field data overview from 1992–1999 for the Brandberge study site. Breeding success shows the numbers of spawn stringswhere metamorphs emerged from versus the total number of strings
Fig. 1. Flow chart of the model simulating natterjack toad popu-lation dynamics.
Table 2. Scenario overview for the stochastic simulation model. Different environmental conditions and different survival rates wereinvestigated for all three basic scenarios, variations in the number of breeding periods were limited to the Brandberge scenario.
Table 3. Parameter overview for the stochastic simulation model.Maximum age: 7 yr. Age of maturity: 2 yr
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