Could high salinity be used to control bullfrogs in small ponds?

Journal of the Arizona-Nevada Academy of Science
By: , and 

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Abstract

We examined survival of bullfrog (Rana catesbeiana) eggs and tadpoles at 3 ppt and 6 ppt salinity in the laboratory to determine if low-level salinity could be used to eradicate bullfrogs from small ponds that contain native fishes. Bullfrog eggs and tadpoles <10 days old experienced 100% mortality when held at 6 ppt salinity for 10 days. Bullfrog tadpoles 10–15 days old experienced significantly reduced survival when exposed to salinity of 6 ppt for 10 days. Older bullfrog tadpoles (>9 months old) appeared unaffected by 14 days of 6 ppt salinity. Salinity of 3 ppt did not impact survival of bullfrog tadpole eggs or tadpoles at any of the life stages we tested. Adding salt to ponds in the early spring to increase salinity to 6 ppt may be a cost effective way to eradicate bullfrogs from small ponds without harming native fishes.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Could high salinity be used to control bullfrogs in small ponds?
Series title Journal of the Arizona-Nevada Academy of Science
DOI 10.2181/036.046.0203
Volume 46
Issue 2
Year Published 2015
Language English
Publisher The Arizona-Nevada Academy of Science
Contributing office(s) Southwest Biological Science Center
Description 3 p.
First page 50
Last page 52
Online Only (Y/N) N
Additional Online Files (Y/N) N