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Tiny Toads Fitted With Backpacks

Date:
May 17, 2005
Source:
University of Alberta
Summary:
A University of Alberta researcher is strapping tiny backpacks to toads in an effort to discover why one species is in serious decline.

Have you seen this toad? Canadian toad populations are on the decline in Alberta.
Credit: Image courtesy of University of Alberta

A University of Alberta researcher is strapping tiny backpacks to toads in an effort to discover why one species is in serious decline.

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Connie Browne, a PhD student in the Department of Biological Sciences, is spending this summer haunting the ponds and sloughs in northern Alberta, Canada, using tiny radio transmitter backpacks to track Canadian and Western toads.

Browne hopes to capture 12 of each kind and using soft surgical tubing, she will belt the toads into tiny, waterproof oval 'backpacks' containing radio transmitters. The signals travel up to one kilometre and will allow Browne to locate the toads and to take note of their preferred habitat.

Browne began radio-tracking toads at Elk Island National Park east of Edmonton, Alberta last year, and confirming earlier research, was unable to spot a single Canadian toad. In fact, she's never seen one. The small, bumpy-skinned species, which dines on grasshoppers and other invertebrates, plays a valuable role in the food web and crop pest control. It has become locally extinct. "We've changed the environment so much, they can't survive anymore," Browne said. "It indicates the aspen parkland is not as healthy as it used to be."

Browne's studies will offer up clues as to how a balance can be struck between land development and the need to preserve breeding, foraging and hibernation habitats for toads and other amphibious species.

Some toads carry their transmitters for only a few days before slipping out of the belt, while others have worn them for as long as six months. Last year, Browne was able to track 12 toads to hibernation and describe their hibernation sites. The transmitters were then removed and the toads released for the winter.

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Story Source:

The above story is based on materials provided by University of Alberta. Note: Materials may be edited for content and length.


Cite This Page:

University of Alberta. "Tiny Toads Fitted With Backpacks." ScienceDaily. ScienceDaily, 17 May 2005. <www.sciencedaily.com/releases/2005/05/050517143943.htm>.
University of Alberta. (2005, May 17). Tiny Toads Fitted With Backpacks. ScienceDaily. Retrieved November 29, 2014 from www.sciencedaily.com/releases/2005/05/050517143943.htm
University of Alberta. "Tiny Toads Fitted With Backpacks." ScienceDaily. www.sciencedaily.com/releases/2005/05/050517143943.htm (accessed November 29, 2014).

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