Abstract

Interference competition driven by hydric stress in Korean Hylids

Highlights

  • All organisms need resources and often these are in short supply, resulting in competition (Schluter, 2000)

  • An examples of indirect interference competition is the production of growth inhibition chemicals by the tadpoles of Bufo calamita and Rana temporaria (Beebee, 1991)

  • Our observations report a second type of competition between Dryophytes japonicus and D. suweonensis: interference competition for calling sites, in non-natural conditions

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Summary

Introduction

All organisms need resources and often these are in short supply, resulting in competition (Schluter, 2000). The two types of competition are nonmutually exclusive, as seen between Ambystoma talpoideum (Holbrook, 1838) and A. maculatum (Shaw, 1802) (Walls & Jaeger, 1987) and between Rana temporaria Linnaeus, 1758 and Bufo calamita Laurenti, 1768 (Griffiths et al, 1991). Interference competition between species occurs both directly and indirectly. An example of direct competition is between the larvae of the salamander Ambystoma maculatum and A. talpoideum, competing over hides (Walls, 1990). An examples of indirect interference competition is the production of growth inhibition chemicals by the tadpoles of Bufo calamita and Rana temporaria (Beebee, 1991). Because of variations in species abilities to exploit resources, the impact of competition can be either symmetric or asymmetric (Begon et al, 2006). When in sympatry with Rana blairi (Mecham, Littlejohn, Oldham, Brown & Brown, 1973), the length of the larval period will increase and the metamorphic body mass will decrease in R. areolata Baird & Girard, 1852, while R. blairi will experience a drop in the number of metamorphosing individuals (Parris & Semlitsch, 1998)

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