Characterization and taxonomic key for tadpoles (Amphibia: Anura) from the northwestern region of São Paulo State, Brazil

Rossa‐Feres, Denise de Cerqueira; Nomura, Fausto

doi:10.1590/s1676-06032006000100014

Cited by 83 publications

(69 citation statements)

References 17 publications

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“…Todos os girinos coletados foram anestesiados em solução de benzocaína 5% e posteriormente fixados e conservados em formalina 10%. A identificação dos anuros na fase larvária foi feita com base em Rossa-Feres & Nomura (2006). Para as espécies que não aparecem na chave de identificação, utilizamos as descrições disponíveis na literatura.…”

Section: Introductionunclassified

Diversidade de Anuros (Amphibia) na reserva extrativista Lago do Cedro e seu entorno, Aruanã, Goiás

Melo

Fava

Pinto³

et al. 2013

Biota Neotrop.

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Abstract:The Cerrado is a tropical savannah with a diversified anuran assemblage, with 209 to 271 known species, of which approximately 51% are endemic. In this study, we report results of an anuran survey performed in the Extractivist Reserve of the Lago do Cedro, located in the northwestern region of the state of Goiás, Brazil. In this area, we recorded 36 anuran species, distributed in five families, from which five species are Cerrado endemics. This high species richness found in the Extractivist Reserve of the Lago do Cedro could be explain by the different vegetational types within the reserve boundaries that promote a high local heterogeneity. Species richness and representativeness per family are similar to other assemblages reported for different areas in the Cerrado domain, being the local anuran assemblage composed by generalist and widely distributed species. The families Hylidae and Leptodactylidae are the most diversified in the studied area, a common pattern found in neotropical assemblages. The Extractivist Reserve Lago do Cedro is an important area for Cerrado conservation because of the anuran diversity and geographic location, which allows the connection among other protected areas within the Araguaia basin.

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Section: Introductionunclassified

Diversidade de Anuros (Amphibia) na reserva extrativista Lago do Cedro e seu entorno, Aruanã, Goiás

Melo

Fava

Pinto³

et al. 2013

Biota Neotrop.

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“…The maximum growth for each stage of development is preceded by an allometric exponential related to embryogenesis and ontogeny, however when it achieves a certain metamorphosis threshold its metamorphic potential is modulated by many ecological factors (Alford, 1999;Rossa-Feres and Nomura, 2006). In the present study, the boundary stage corresponded to phase 30, because stages 23, 25 and 30 maintain the same proportionality development and a strong alteration takes place in stage 37, in which the larvae loses its exclusive hydrodynamic aspect and adds its new morphology characters related to the fore limbs.…”

Section: Resultsmentioning

confidence: 99%

“…As demonstrated, the proportional and sequencial isometry loses this constant, abruptly changing the body parts growth rates when the tadpole achieves stage 37, retaking the same condition of proportionality and sequencing in stage 39 and making way for a new alteration in the development proportionality rate in stage 42. Rossa-Feres and Nomura (2006), concluded that the external morphology is constituted by a set of morphologic characters, some of which retain the evolutive history, while others are more plastic and therefore, susceptible to environmental pressure.…”

Section: Resultsmentioning

confidence: 99%

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Morphometrics and ratio of body proportionality of tadpoles of Rhinella icterica (Anura, Bufonidae) at different developmental stages

Lima

Pederassi²

2012

Braz. J. Biol.

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The plasticity of the anurans' development is probably related to their great ecological and geographic diversity. Therefore, the understanding of environmental occupation by tadpoles is related to their morphological peculiarities. We evaluated the morphologic development of the larval phases 23, 25, 30, 37, 39 and 42 of Rhinella icterica with the aim of establishing the ratio of growth, the increase in corporal mass in relation to growth and the isometry of the corporal variables for each evaluated stage. We submitted the corporal variables to the Multivariate Allometry and the relation between these variables was evaluated using the Principal Components Analysis. We verified the isometric growth and correlation between the different variables, evaluated the growth according to the body mass and established the proportionality ratio between the corporal regions. Each corporal region evaluated presented a fixed proportionality ratio, regardless of the stage, and the size of this portion was found when its proportionality index was multiplied by the tadpole's total length. This study demonstrates that the larval phase of R. icterica presents an isometric growth with proportional development of the corporal parts regardless of the evaluated stage.Keywords: amphibian, allometry, tadpole, ratio of growth. Biometria e razão de proporcionalidade corpórea em girinos de Rhinella icterica(Anura: Bufonidae) em diferentes estágios de desenvolvimento ResumoA plasticidade do desenvolvimento dos anuros é em razão, provavelmente, da sua grande diversidade ecológica e geográfica, além de que a compreensão da ocupação do ambiente por suas larvas está relacionada às suas peculiaridades morfológicas intra e interespecíficas. Avaliamos aqui o desenvolvimento morfológico das fases larvais 23, 25, 30, 37, 39 e 42 de Rhinella icterica, objetivando estabelecer as suas razões de crescimento, o aumento da massa em relação ao crescimento e a isometria de desenvolvimento corporal para cada estágio avaliado. Para tal, submetemos as variáveis corpóreas à Alometria Multivariada, sendo o relacionamento entre essas variáveis avaliado pela análise dos Componentes Principais. Verificamos a isometria do crescimento e a correlação entre as diversas variáveis, além de avaliarmos o crescimento em função da massa corpórea e estabelecermos a razão de proporcionalidade entre as regiões corpóreas. Cada região corpórea avaliada apresentou uma razão de proporcionalidade fixa, independente do estágio, sendo o tamanho dessa região encontrada quando seu índice de proporcionalidade era multiplicado pelo comprimento total. Este estudo demonstra que a fase larvar de R. icterica apresenta crescimento isométrico com desenvolvimento proporcional das regiões corpóreas independentemente do estágio avaliado.Palavras-chave: anfíbio, alometria, girino, razão de crescimento.

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“…In Ranidae, the formula was smaller, 3/3 or more (5/3, 2/4, 3/4 or 6-7/6). In some Hylidae, Pipidae "Xenopus laevis" and Rhinophrynidae"Rhinophrynus dorsalis" the oral disc were not protruded and the formula was 2/2, 2/3 or 2/4 (Nascimento et al, 2005;Alcalde and Blotto, 2006;Rossa-Feres and Nomura, 2006;Vieira et al, 2007;Bekhet, 2012). These keratinized teeth are derived from cells present in the base of the tooth ridge (Gosner, 1959).…”

Section: Introductionmentioning

confidence: 99%

Comparison study of oral disc morphology of Saudi Bufo dhufarensis and Rana ridibunda tadpoles and their oral deformities

Bekhet¹

2014

J. Cell Anim. Biol.

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The microanatomy of the oral discs of the tadpoles of Bufo dhafarensis and Rana ridibunda were described. Tadpoles of stage 49 and 41, respectively were examined and analyzed using scanning electron microscope. In Rana tadpoles, the mouth was ventral and the oral disk opening had the same vertical and horizontal opening size. While in Bufo tadpoles, the mouth was anterio-ventral and the oral disc had its horizontal opening larger than the vertical one. The border of oral disc of tadpoles of B. dhufarensis was surrounded with 22 marginal papillae and 8 submarginal papillae and a dorsal gap was observed. The oral disc of Bufo had less number of marginal papillae where they were short and had broad smooth ends with no apical parts. On the other hand, the border of the Rana's oral disc was surrounded by 50 marginal papillae and 10 submarginal where the dorsal gap was also observed. Both marginal and the submarginal papillae were long, numerous, closely spaced and ending with 3-7 apical parts in each papilla. The labial tooth row formula (LTRF) of the tadpoles of B. dhufrenensis was 2/3, while that of the tadpoles of R. ridibunda pallas was 2(1)/3(1-2). In B. dhufarensis, the labial teeth were keratinized, short ending with 4-7 terminal cusps and arranged as a single row. On the contrary, the labial teeth of R. ridibunda pallas were elongated, closely spaced and numerous. These labial teeth were noticed to be either vertically positioned or curved downwards carrying 3-4 terminal cusps in their free ends. Herein, we described Saudi Arabian Amphibian B. dhufrenensis and R. ridibunda pallas by utilizing scanning electron micrographs. In the present study, we described deformities in the oral disc of B. dhufrenensis and R. ridibunda pallas tadpoles in their natural conditions.

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Characterization and taxonomic key for tadpoles (Amphibia: Anura) from the northwestern region of São Paulo State, Brazil

Cited by 83 publications

References 17 publications

Diversidade de Anuros (Amphibia) na reserva extrativista Lago do Cedro e seu entorno, Aruanã, Goiás

Diversidade de Anuros (Amphibia) na reserva extrativista Lago do Cedro e seu entorno, Aruanã, Goiás

Morphometrics and ratio of body proportionality of tadpoles of Rhinella icterica (Anura, Bufonidae) at different developmental stages

Comparison study of oral disc morphology of Saudi Bufo dhufarensis and Rana ridibunda tadpoles and their oral deformities

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