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Short Notes

Short Notes Short Notes Eggs of Bufo calamita are toxic to Rana dalmatina tadpoles Hans Heusser Frohberg 49d, CH-8645 Rapperswil-Jona, Switzerland Eggs, hatchlings and tadpoles of Bufo marinus are known to be toxic to tadpoles of different anuran species that prey upon them (Crossland, 1998a; Crossland and Alford, 1998; Crossland and Azevedo-Ramos, 1999). The eggs of the European Bufo calamita are eaten by the tadpoles of different sympatric anuran species, but a toxic effect on the predators has not been mentioned (compilation in Sinsch, 1998). In spring 2000 the author tested intra- and interspeciŽ c spawn predation by the tadpoles of Rana dalmatina , an early breeding European brown frog that may have a priority effect against species that breed later in the same pond. From May to July predator tadpoles ( R. dalmatina ) were kept outdoors in containers with 10 l tapwater without any bottom sediments and plants. The tadpoles were given a deŽ nite number of eggs of Bufo calamita (cuts of strings with the jelly envelope) as prey (table 1). During the experiments the tadpoles were also fed with the commercial Ž sh food Tetra Pond R ° . The experiments were performed at Jona, near Zurich, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Amphibia-Reptilia Brill

Short Notes

Amphibia-Reptilia , Volume 22 (3): 15 – Jan 1, 2001
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Publisher
Brill
Copyright
Copyright © Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0173-5373
eISSN
1568-5381
DOI
10.1163/156853801317050151
Publisher site
See Article on Publisher Site

Abstract

Short Notes Eggs of Bufo calamita are toxic to Rana dalmatina tadpoles Hans Heusser Frohberg 49d, CH-8645 Rapperswil-Jona, Switzerland Eggs, hatchlings and tadpoles of Bufo marinus are known to be toxic to tadpoles of different anuran species that prey upon them (Crossland, 1998a; Crossland and Alford, 1998; Crossland and Azevedo-Ramos, 1999). The eggs of the European Bufo calamita are eaten by the tadpoles of different sympatric anuran species, but a toxic effect on the predators has not been mentioned (compilation in Sinsch, 1998). In spring 2000 the author tested intra- and interspeciŽ c spawn predation by the tadpoles of Rana dalmatina , an early breeding European brown frog that may have a priority effect against species that breed later in the same pond. From May to July predator tadpoles ( R. dalmatina ) were kept outdoors in containers with 10 l tapwater without any bottom sediments and plants. The tadpoles were given a deŽ nite number of eggs of Bufo calamita (cuts of strings with the jelly envelope) as prey (table 1). During the experiments the tadpoles were also fed with the commercial Ž sh food Tetra Pond R ° . The experiments were performed at Jona, near Zurich,

Journal

Amphibia-Reptilia – Brill

Published: Jan 1, 2001

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