The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

 ISSN 0268-0130

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pdf 04. Feeding habits of sympatric Discoglossus montalentii, Discoglossus sardus and Euproctus montanus during the breeding season


Open Access


Authors: Sebastiano Salvidio , Roberto Sindaco And Livio Emanueli

Abstract: The diets of three Corsican amphibians, Discoglossus montalentii, Discoglossus sardus and Euproctus montanus, were studied in the Ospedale region during the breeding season. Adult specimens were collected in or around breeding pools and were stomach flushed in the field. Prey taxa included a large variety of terrestrial and aquatic prey items of variable size, indicating opportunistic predation. All species were able to catch their prey both on land and in water, but varied in the proportions of aquatic and terrestrial prey consumed. E. montanus fed largely upon benthic macroinvertebrates, suggesting predation in deep water; D. sardus mainly captured terrestrial prey; and D. montalentii showed a mixed feeding strategy, preying upon both terrestrial and aquatic prey categories in similar proportions. Discoglossus sardus showed the highest standardized value of niche breadth (D, = 0.769), compared to D. montalentii and E. montanus (D, = 0.544 and D, = 0.523 respectively). When prey size frequency distributions were compared, no specific differences were observed. These results indicated that, at least during the breeding season, trophic segregation among sympatric amphibians was maintained by different foraging strategies, and that the three species exploited contiguous microhabitats in different ways.

Keywords: Corsica, Discoglossus, Euproctus, foraging strategy, sympatry

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