Feeding ecology and basal food sources that sustain the Paradoxal frog Pseudis minuta: a multiple approach combining stomach content, prey availability, and stable isotopes

Huckembeck, Sônia; Loebmann, Daniel; Albertoni, Edélti Faria; Hefler, Sônia Marisa; Oliveira, Mauro César Lamim Martins de; Garcia, Alexandre

doi:10.1007/s10750-014-2022-2

Cited by 34 publications

(40 citation statements)

References 49 publications

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“…Some authors criticize the use of IAI alleging the possibility of an overestimation of small size and numerous items (Hyslop 1980). However, our results corroborate the analysis of stable isotopes presented by Huckembeck et al (2014), which indicates that P. minuta tadpoles are primary consumers. In additional, the diet pattern found in P. minuta is in consonance with diet described to P. paradoxa tadpoles, which feed mainly on algae, invertebrates, plant remains and debris (Arias et al 2002).…”

supporting

confidence: 88%

“…Neotropical frogs from the genera Pseudis encompass those hylids species most adapted to live in aquatic environments (Huckembeck et al 2014). The most conspicuous feature of this genus, however, is the fact their tadpoles are much larger than adults and for this reason they are known as Paradoxal frogs (Garda and Canatella 2007).…”

mentioning

confidence: 99%

“…Vegetation was dominated by Poaceae family grasses, a few shrubs and species of macrophytes (see Huckembeck et al 2014). Pseudis minuta tadpoles were collected in April 2009 by dip nets employed randomly along the water body and fixed in 10% formalin.…”

mentioning

confidence: 99%

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What the largest tadpole feeds on? A detailed analysis of the diet composition of Pseudis minuta tadpoles (Hylidae, Dendropsophini)

Huckembeck

Alves

Loebmann

et al. 2016

An. Acad. Bras. Ciênc.

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We analyzed the diet of 25 individuals of Pseudis minuta tadpoles which consisted in debris with more than 30%, follow by diatoms, euglenids, green algae, and desmids. With regard to the feeding strategy, P. minuta tadpoles are generalist consumer. The negative correlation between the abundance of items in the digestive tract and the mouth width indicate an effect of metamorphosis on the diet. key words: algae, anuran, metamorphosis, trophic ecology.

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confidence: 88%

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confidence: 99%

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What the largest tadpole feeds on? A detailed analysis of the diet composition of Pseudis minuta tadpoles (Hylidae, Dendropsophini)

Huckembeck

Alves

Loebmann

et al. 2016

An. Acad. Bras. Ciênc.

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“…Selective choice vs. opportunistic behaviour in terms of readily accepting changes in the composition of potential prey is another important aspect of the feeding ecology of predators, which may be detected by repeated sampling from consecutive seasons or years. Many anurans are considered to be generalist and opportunist feeders consuming a wide variety of prey, mainly invertebrates, without detectable selection (Wells 2007, Huckembeck 2014, Schalk et al 2014. A seasonal shift in diet composition is detected in several frog species and is frequently interpreted as the manifestation of opportunistic feeding behaviour (Kovács et al 2007, Valderrana-Vernaza et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Responses in the diet composition of the Common frog (Rana temporaria) to the stochastic gradation of Autumnal moth (Epirrita autumnata) larvae

Kovács

Herczeg

Hettyey

2017

Acta Zool Acad Sci H

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We studied the feeding ecology of the common frog Rana temporaria in a population located at the subarctic taiga-tundra frontier in Finland over two consecutive years (2002, 2003). In the summer of 2003, an unexpected gradation of autumnal moth (Epirrita autumnata) larvae occurred at our study site. This situation allowed us to study the changes in the diet composition of the same common frog population between a presumably average and an extraordinary year with respect to the gradation of one of the prey species. We found clear evidence for the opportunistic feeding behaviour of common frogs in a natural population, as reflected by the mass appearance of Epirrita autumnata larvae in the frogs' stomach content in 2003. Further, our results draw attention to the fact that a one-year study on the feeding ecology of an opportunistic species can result in flawed conclusions.

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“…Indeed, others have found ontogenetic shifts in diet between tadpoles and frogs using stable isotopes 136! (Jefferson and Russell 2008;Trakimas et al 2011;Huckembeck et al 2014). While L.…”

Section: !mentioning

confidence: 99%

The evolution and ecology of individual specializations amongst a group of dietary generalists.

Cloyed¹

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This dissertation examines individual diet specializations (IS) in a group of ecologically similar and evolutionarily related frogs and toads. Individual specialization is known to have widespread ecological and evolutionary effects.In an initial literature review (Chapter 2) I build a comprehensive theoretical framework showing how different types of population diversity can help, halt, or hinder sympatric speciation. I argue that IS can be maintained indefinitely in populations yet fail to lead to speciation because it is influenced by ecological conditions that may change.Additionally, IS can potentially aid niche partitioning among similar species, increasing species coexistence and resulting in less of the ecological opportunity required to develop more discrete polymorphisms.Stable isotopes are an increasingly common ecological tool for determining diets and habitat usage. However, to use them accurately, researchers need taxon-specific trophic discrimination factors and isotopic incorporation rates on any tissue used for stable isotope analysis. I determined these important isotope properties in adult frogs for the first time (Chapter 3), which not only allows me to use them in the following sections of v! my dissertation, but also allows other researchers to use stable isotopes to study frog and toad diets.Using stable isotope analyses, I examined how IS is influenced by ecological conditions (Chapter 4). I measured IS in five species of frogs and toads and determined which of three ecological parameters (resource diversity, intraspecific competition, and interspecific competition) affected IS in each species. I found that species differed in which ecological parameter best explained IS. Resource diversity most frequently affected IS, with conspecific density second in importance. My results showed that different ecological conditions support IS in different species.Finally, again using stable isotopes, I investigated whether intrapopulation niche variation could aid niche partitioning among the same five species of frogs and toads (Chapter 5). I found that species differed in their niches, but that subsets of individuals overlapped among species. The limited number of individuals overlapping between species decreases their interaction strength, which can contribute to niche partitioning and thus to species coexistence.vi!

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Feeding ecology and basal food sources that sustain the Paradoxal frog Pseudis minuta: a multiple approach combining stomach content, prey availability, and stable isotopes

Cited by 34 publications

References 49 publications

What the largest tadpole feeds on? A detailed analysis of the diet composition of Pseudis minuta tadpoles (Hylidae, Dendropsophini)

What the largest tadpole feeds on? A detailed analysis of the diet composition of Pseudis minuta tadpoles (Hylidae, Dendropsophini)

Responses in the diet composition of the Common frog (Rana temporaria) to the stochastic gradation of Autumnal moth (Epirrita autumnata) larvae

The evolution and ecology of individual specializations amongst a group of dietary generalists.

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