Hatchery breeds Wyoming's rarest toad


This study is summarised as evidence for the following.

Action Category

Use hormone treatment to induce sperm and egg release during captive breeding

Action Link
Amphibian Conservation
  1. Use hormone treatment to induce sperm and egg release during captive breeding

    A replicated study in 1999–2006 of Wyoming toads Bufo hemiophrys baxteri in Saratoga, Wyoming, USA (Springer 2007) found that hormone treatment of males and females induced successful breeding in captivity. Between 1999 and 2006, an average of 6,863 toads were bred and released each year. In 2006, an 18% increase in hatch rate was achieved. This was thought to be due to over-wintering at cooler temperatures, to simulate the harsh weather faced in the wild. Breeding pairs were carefully selected from a studbook of the 150 captive toads. Pairs were housed in separate water tanks. Toads were injected with hormones to induce production of eggs and sperm. Over 20 breeding events were undertaken each year. Most toads are released as tadpoles in autumn.


Output references

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