A laboratory experiment on interspecific competition between tadpoles of Geocrinia victoriana and Pseudophryne semimarmorata (Anura, Myobatrachinae)

Gollmann, Birgit; Gollmann, Günter

doi:10.1163/156853893x00048

Cited by 4 publications

(3 citation statements)

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“…Asymmetric competition is not uncommon among tadpoles. Indeed, several experimental studies have shown tadpoles of one species to have a big impact on tadpoles of a second species, while tadpoles of the second species have little impact on the first species (Smith‐Gill and Gill 1978, Wilbur 1982, 1987, Morin and Johnson 1988, Griffiths 1991, Werner 1992, Gollmann and Gollmann 1993, Warner et al 1993, Kupferberg 1997, Bardsley and Beebee 1998, 2000, 2001, Parris and Semlitsch 1998, Werner and Glennemeier 1999, Relyea 2000, Goméz‐Mestre and Tejedo 2002). We found that gray treefrog tadpoles ( Hyla versicolor ) were more affected by intraspecific competition than interspecific competition, while green frog tadpoles ( Rana clamitans ) were more affected by interspecific competition than intraspecific competition.…”

Section: Discussionmentioning

confidence: 99%

Asymmetric competition between Rana clamitans and Hyla versicolor tadpoles

Smith

Dingfelder²,

Vaala³

2004

Oikos

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2004. Asymmetric competition between Rana clamitans and Hyla versicolor tadpoles. Á/ Oikos 105: 626 Á/632.When two organisms interact over a potentially limiting resource, several outcomes are possible (e.g. neither affected, both equally affected, one affected more than the other). The outcome depends on a variety of factors, both internal and external to the organism. We performed a laboratory experiment to investigate the outcome of potential competitive interactions between tadpoles of the green frog (Rana clamitans ) and the gray treefrog (Hyla versicolor ), and to examine the factors that may explain the outcome of the interaction. We found that competition between these two species was asymmetric. Hyla versicolor tadpoles were more affected by intraspecific competition than interspecific competition (i.e. grew faster when grown with heterospecifics than conspecifics); whereas, R . clamitans tadpoles were more affected by interspecific competition than intraspecific competition (i.e. grew faster when grown with conspecifics than heterospecifics). Based on behavioral observations, this result could not be explained on the basis of activity levels, a trait previously linked to competitive ability in tadpoles. However, differences in initial body size may help explain the observed results; the gray treefrog tadpoles were larger than the green frog tadpoles.

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Section: Discussionmentioning

confidence: 99%

Asymmetric competition between Rana clamitans and Hyla versicolor tadpoles

Smith

Dingfelder²,

Vaala³

2004

Oikos

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“…These hormonal influences can occur at the level of independently programmed and regulated tissue‐specific (“peripheral”) responses to TH and/or at the level of the hypothalamus–pituitary–thyroid gland axis, which controls tissue transformation “centrally” (Denver 1996; Shi et al 1996). Whereas several studies have shown two species may differ in larval period duration when reared under laboratory conditions (Rafinska 1991; Gollmann and Gollmann 1993; Ptacek 1996), no previous study has examined potential endocrine basis for this difference or put such endocrine comparisons in a phylogenetic context. Here, we tested the hypothesis that differences in TH physiology, specifically tissue TH content and in vitro tissue sensitivity and responsivity to TH, correlate with differences in larval period duration between spadefoot toad species.…”

Section: Introductionmentioning

confidence: 99%

Variation in thyroid hormone action and tissue content underlies species differences in the timing of metamorphosis in desert frogs

Buchholz

Hayes

2005

Evolution and Development

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Hormonal control of post-embryonic morphogenesis is well established, but it is not clear how differences in developmental endocrinology between species may underlie animal diversity. We studied this issue by comparing metamorphic thyroid hormone (TH) physiology and gonad development across spadefoot toad species divergent in metamorphic rate. Tissue TH content, in vitro tail tip sensitivity to TH, and rates of TH-induced tail tip shrinkage correlated with species differences in larval period duration. Gonad differentiation occurred before metamorphosis in species with long larval periods and after metamorphosis in the species with short larval periods. These differences in TH physiology and gonad development, informed by phylogeny and ecology of spadefoot metamorphosis, provide evidence that selection for the short larval periods in spadefoot toads acted via TH physiology and led to dramatic heterochronic shifts in metamorphic climax relative to gonad development.

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“…Various descriptions of the embryonic and larval development of the two eastern exotrophic species have been published (Littlejohn and Martin 1964;Martin 1967;Littlejohn et al 1971;Watson and Martin 1973;Martin and Littlejohn 1982;Gollmann and Gollmann 1991a,b, 1992a,b, 1993, 1996aAnstis 2002). For the southwestern species, there are studies including some developmental descriptions of G. leai and G. rosea by Main (1957Main ( , 1965 and of G. vitellina by Mitchell (2001).…”

Section: Introductionmentioning

confidence: 99%

A comparative study of divergent embryonic and larval development in the Australian frog genus Geocrinia (Anura: Myobatrachidae)

Anstis¹

2010

Rec West Aust Mus

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-Embryonic and larval development of the seven Geocrinia species across Australia are described and compared. This Australian myobatrachid genus includes three species with terrestrial embryonic development followed by aquatic exotrophic larval development and four species with entirely terrestrial and endotrophic development. Comparisons are made among species within the terrestrial/exotrophic group and the endotrophic group, and between the two breeding modes of each different species-group. Morphological differences are noted between northern and southeast coastal Western Australian populations of G. leai tadpoles. The G. rosea group shares some similarities with the other Australian endotrophic species in the genus Philoria and Crinia nimbus.

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A laboratory experiment on interspecific competition between tadpoles of Geocrinia victoriana and Pseudophryne semimarmorata (Anura, Myobatrachinae)

Cited by 4 publications

References 0 publications

Asymmetric competition between Rana clamitans and Hyla versicolor tadpoles

Asymmetric competition between Rana clamitans and Hyla versicolor tadpoles

Variation in thyroid hormone action and tissue content underlies species differences in the timing of metamorphosis in desert frogs

A comparative study of divergent embryonic and larval development in the Australian frog genus Geocrinia (Anura: Myobatrachidae)

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