Study

Actions

This study is summarised as evidence for the following.

Action Category

Amphibians: Manipulate temperature of enclosure to improve development or survival to adulthood

Action Link
Management of Captive Animals
  1. Amphibians: Manipulate temperature of enclosure to improve development or survival to adulthood

    A replicated study in 2014 in Shiraz, Iran found that developing eggs of green frog Bufotes viridis had higher survival rates, higher growth rates and lower abnormalities when reared in temperatures from 12 to 25°C, than those reared outside this range. Survival at different temperatures was as follows: 0°C = 50%, 2°C = 60%, 8°C = 75%, 12-25°C = 95-100%, 30°C = 75%, 33°C = 65%, 37°C = 50%, 40°C = 0%. Embryos developing at different temperatures (8, 15, 18, 25, and 30°C) showed a significant difference in the time required to reach development stage 25. At 8°C, eggs had developed to stage 25 after 280 hours, but after only 52 hours at 30°C. In a separate experiment, eggs reared at 0°C and 40°C exhibited no development and no embryos survived. A thermostat-controlled aquarium housed 18 chambers, starting with 150 eggs each, across a temperature gradient with a heater at one end and a chilling unit at the other.

Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read latest volume: Volume 17

Go to the CE Journal

Subscribe to our newsletter

Please add your details if you are interested in receiving updates from the Conservation Evidence team about new papers, synopses and opportunities.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust