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

Lima, Mauro Sérgio Cruz Souza; Pederassi, Jonas

doi:10.1590/s1519-69842012000300028

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Anatomical development of frog tadpoles has been described quantitatively in ecological and toxicological contexts (Mouche et al, ; Lima and Pederassi, ). While quantitative analyses of later stage Xenopus tadpoles and metamorphs is more common (Rose, ; Asquith and Vonesh, ; Vandenberg et al, ), there are no quantitative descriptions of the craniofacial anatomy during early development.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Analysis of Orofacial Development and Median Clefts in Xenopus Laevis

Kennedy

Dickinson

2014

The Anatomical Record

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Xenopus has become a useful tool to study the molecular mechanisms underlying orofacial development. However, few quantitative analyses exist to describe the anatomy of this region. In this study we combine traditional facial measurements with geometric morphometrics to describe anatomical changes in the orofacial region during normal and abnormal development. Facial measurements and principal component (PC) analysis indicate that during early tadpole development the face expands primarily in the midface region accounting for the development of the upper jaw and primary palate. The mouth opening correspondingly becomes flatter and wider as it incorporates the jaw elements. A canonical variate analysis of orofacial and mouth opening shape emphasized that changes in the orofacial shape occur gradually. Orofacial anatomy was quantified after altered levels of retinoic acid using all-trans retinoic acid or an inhibitor of retinoic acid receptors or by injecting antisense oligos targeting RALDH2. Such perturbations resulted in major decreases in the width of the midface and the mouth opening illustrated in facial measurements and a PC analysis. The mouth opening shape also had a gap in the primary palate resulting in a median cleft in the mouth opening that was only illustrated quantitatively in the morphometric analysis. Finally, canonical and discriminant function analysis statistically distinguished the orofacial and mouth opening shape changes among the different modes used to alter retinoic acid signaling levels. By combining quantitative analyses with molecular studies of orofacial development we will be better equipped to understand the complex morphogenetic processes involved in palate development and clefting. Anat Rec, 297:834-855, 2014. V C 2014 Wiley Periodicals, Inc.

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Section: Discussionmentioning

confidence: 99%

Quantitative Analysis of Orofacial Development and Median Clefts in Xenopus Laevis

Kennedy

Dickinson

2014

The Anatomical Record

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“…The toad Rhinella icterica (Spix, 1824) is distributed throughout southern South America, from eastern Paraguay to northern Argentina, in southern and southeastern Brazil, and northwards to the state of Bahia (Frost, 2019). This species differs from other Rhinella marina group species mainly by the presence of a subtriangular parotoid and tibial glands, as well as less developed foot webs, and tadpoles with isometric growth (Kwet et al 2006;Lima and Pederassi 2012). Besides being a large-bodied anuran, surprisingly little is known about this species in terms of reproduction (Pereyra et al 2015) and habitat selection (Guix et al 1998).…”

Section: Introductionmentioning

confidence: 97%

Lurking in the depth: Pond depth predicts microhabitat selection by Rhinella icterica (Anura: Bufonidae) tadpoles at two different sampling scales

Preuss¹,

Mauad²,

Kitamura³

et al. 2021

Herpetozoa

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Habitat selection has long been a central theme in ecology and has historically considered both physiological responses and ecological factors affecting species establishment. Investigating habitat selection patterns at different scales can provide important information on the relative roles of the environmental factors influencing the organisms’ abilities to use their surrounding habitat. This work aimed at investigating which environmental factors determine habitat selection by Rhinella icterica tadpoles, and also took the opportunity to investigate how the scale in which tadpoles and environmental data are sampled might influence the habitat selection results. A total of 2.240 tadpoles were counted in the whole sampling area, and while substrate cover and depth were the variables that better explained the abundance of tadpoles at the larger scale (plot level), depth and water turbidity better explained tadpoles’ abundance at the smaller scale (subplot level). The results suggest that avoiding predation by matching the background color is a likely process explaining tadpoles’ occupancy at both scales. Depth is known to influence tadpole habitat use in the tropics, and although its combination with turbidity and substrate cover varied between scales, our study suggests that sampling at different scales might not affect the inferred ecological processes driving habitat selection. This information might also be useful to predict tadpoles’ responses to micro-environmental perturbations and help in guiding the choice of parameters that should be taken into account when analyzing the effects of habitat degradation in Atlantic Forest amphibian populations.

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“…Lima and Pederassi (2012) and Lima et al (2014) showed studies in which the stage progress decreases the probability of mortality, but reduces the population size of the species.…”

Section: Introductionmentioning

confidence: 99%

Estimation of a closed population size of tadpoles in temporary pond

2017

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The practice of capture-recapture to estimate the diversity is well known to many animal groups, however this practice in the larval phase of anuran amphibians is incipient. We aimed at evaluating the Lincoln estimator, Venn diagram and Bayes theorem in the inference of population size of a larval phase anurocenose from lotic environment. The adherence of results was evaluated using the Kolmogorov-Smirnov test. The marking of tadpoles for later recapture and methods measurement was made with eosin methylene blue. When comparing the results of Lincoln-Petersen estimator corresponding to the Venn diagram and Bayes theorem, we detected percentage differences per sampling, i.e., the proportion of sampled anuran genera is kept among the three methods, although the values are numerically different. By submitting these results to the Kolmogorov-Smirnov test we have found no significant differences. Therefore, no matter the estimator, the measured value is adherent and estimates the total population. Together with the marking methodology, which did not change the behavior of tadpoles, the present study helps to fill the need of more studies on larval phase of amphibians in Brazil, especially in semi-arid northeast.Keywords: Amphibia, Anura, capture-recapture, diversity, lentic environments. Estimativa do tamanho da população fechada de girinos em lagoas temporárias ResumoA prática de captura-recaptura para a estimação da diversidade é bem conhecida para diversos grupos animais, porém na fase larvar de anfíbios anuros essa prática é incipiente. Objetivamos avaliar os métodos do estimador de Lincoln, diagrama de Venn e o teorema de Bayes na inferência do tamanho populacional de uma anurocenose em fase larvar de ambiente lótico. A aderência dos resultados foi avaliada através do teste de Kolmogorov-Smirnov. A marcação dos girinos para posterior recaptura e aferição dos métodos foi feita com eosina de azul de metileno. Ao compararmos os resultados do estimador de Lincoln que corresponde com o do diagrama de Venn e com o teorema de Bayes detectamos diferenças percentuais por amostragem, isto é, a manutenção da proporção dos gêneros de anuros amostrados é mantida entre os três métodos, embora com valores numericamente diferentes. Ao submetermos esses resultados ao teste Kolmogorov-Smirnov não encontramos diferenças significativas. Logo, qualquer que seja o estimador o valor aferido é aderente e estima a população total. Aliado à metodologia de marcação que não alterou o comportamento dos girinos, o presente estudo ajuda a preencher a necessidade de mais estudos na fase larvar dos anfíbios no Brasil, em especial no semiárido nordestino.

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

Cited by 7 publications

References 12 publications

Quantitative Analysis of Orofacial Development and Median Clefts in Xenopus Laevis

Quantitative Analysis of Orofacial Development and Median Clefts in Xenopus Laevis

Lurking in the depth: Pond depth predicts microhabitat selection by Rhinella icterica (Anura: Bufonidae) tadpoles at two different sampling scales

Estimation of a closed population size of tadpoles in temporary pond

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