Microestrutura de pêlos-guarda de felídeos Brasileiros: considerações para a identificação de espécies

Vanstreels, Ralph Eric Thijl; Ramalho, Fernanda do Passo; Adania, Cristina Harumi

doi:10.1590/s1676-06032010000100029

Cited by 15 publications

(19 citation statements)

References 12 publications

(13 reference statements)

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“…We cleaned the guard hairs with ethyl alcohol, and the cuticular impressions were obtained by pressing the hairs against a thin layer of nail varnish and leaving them to dry for three to five minutes on glass slides with the help of a bench vise (adapted from [65]). We photographed the cuticular impressions at 400x magnification (S2 Fig) and compared the pattern of the cuticles with our reference collection (obtained from hairs collected from museum specimens) and published guides [66, 67]. …”

Section: Methodsmentioning

confidence: 99%

Landscape Use and Co-Occurrence Patterns of Neotropical Spotted Cats

et al. 2017

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Small felids influence ecosystem dynamics through prey and plant population changes. Although most of these species are threatened, they are accorded one of the lowest research efforts of all felids, and we lack basic information about them. Many felids occur in sympatry, where intraguild competition is frequent. Therefore, assessing the role of interspecific interactions along with the relative importance of landscape characteristics is necessary to understand how these species co-occur in space. Here, we selected three morphologically similar and closely related species of small Neotropical cats to evaluate the roles of interspecific interactions, geomorphometry, environmental, and anthropogenic landscape characteristics on their habitat use. We collected data with camera trapping and scat sampling in a large protected Atlantic forest remnant (35,000 ha). Throughout occupancy modeling we investigated whether these species occur together more or less frequently than would be expected by chance, while dealing with imperfect detection and incorporating possible habitat preferences into the models. We used occupancy as a measure of their habitat use. Although intraguild competition can be an important determinant of carnivore assemblages, in our system, we did not find evidence that one species affects the habitat use of the other. Evidence suggested that proximity to the nature reserve (a more protected area) was a more important driver of Neotropical spotted cats’ occurrence than interspecific interactions or geomorphometry and environmental landscape characteristics—even though our entire study area is under some type of protection. This suggests that small felids can be sensitive to the area protection status, emphasizing the importance of maintaining and creating reserves and other areas with elevated protection for the proper management and conservation of the group.

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Section: Methodsmentioning

confidence: 99%

Landscape Use and Co-Occurrence Patterns of Neotropical Spotted Cats

et al. 2017

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“…The development of the two layers varies with the climate of the environment where the animal is found; it also underwent modifications due to the domestication process (Dreyer, 1966). The undercoat is shorter, thinner, wavy and numerous, it contributes to thermoregulation and protects against water penetration (Vanstreels et al, 2010). The guard coat is longer, thicker and less numerous, it stands out and contributes mainly to mechanoreception, camouflage in the environment and general pattern determination of coat coloration (Teerink, 1991;Martin et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

Tricologia para identificação de raças e espécies de mamíferos: uma revisão sobre sua aplicação na pesquisa científica e a importância na agropecuária

Felix¹,

Piovezan²,

Quadros

et al. 2014

ARCH ZOOTEC

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A estrutura microscópica de pelos é espécie-específica. Ela permite não apenas a identificação de espécies, mas também a identificação de raças. A tricologia é amplamente utilizada para identificação de espécies em pesquisas taxonômicas, ecológicas, paleontológicas, arqueológicas, como controle de qualidade de alimentos e forenses, mas são pouco exploradas na agropecuária. O conhecimento, o estudo e, principalmente, a divulgação desta técnica abre a perspectiva para a pesquisa em diversas áreas da produção animal principalmente nos estudos relacionados aos recursos genéticos animal (RGAs). Do ponto de vista zootécnico a utilização de uma metodologia de fácil execução com baixo custo de realização e confiável é uma alternativa de grande importância. A tricologia é uma importante ferramenta para estudos sobre raças locais no Brasil, considerando que a caracterização dos pelos pode elucidar características como rusticidade, prolificidade, resistência à endo e ectoparasitas e adaptação às condições adversas que justificam os programas de conservação de tais recursos genéticos animais. Esta revisão foi redigida com o objetivo de discutir o uso da análise microscópica de pelos de mamíferos, sua aplicação na pesquisa científica e a importância para a produção e pesquisa agropecuária.

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“…This technique, however, is not without shortcomings. The results obtained illustrate that spe- cific determination by visual comparison of scale widths (QUADROS & MONTEIRO-FILHO 2010, VANSTREELS et al 2010) is subjective and cannot be used to identify the species of these small Neotropical felids, even with the use of metric variables (see the overlap of metrics of hair scales in Figs. 7 and 8).…”

mentioning

confidence: 97%

“…In a study that included all Brazilian felid species, VANSTREELS et al (2010) indicated that they were able to successfully identify only 75% of the samples. Because this indirect tool is so important and so widely used (e.g., WANG 2002, MARTINS et al 2008, TÓFOLI et al 2009, BIANCHI et al 2011, SILVA-PEREIRA et al 2011, and considering the flaws in the diagnostics elaborated by VANSTREELS et al (2010) (their method is circular: they used only qualitative characters for species determination, which in turn are dependent on the experience and the skills of the observer), we endeavored to evaluate metrically its usefulness to identify L. guttulus, P. yagouaroundi, L. wiedii, and L. pardalis.…”

mentioning

confidence: 99%

“…The current method used for the identification of these four species follows three procedures: identification of the medullar pattern, the cuticular pattern, and the relationship between width and length of the cuticular scales of the hair shaft (QUADROS & MONTEIRO-FILHO 2010, VANSTREELS et al 2010 (QUADROS & MONTEIRO-FILHO 2010). Each small Neotropical Brazilian felid can be identified using the relationship between width and length of the scales on the shaft of the guard hairs (QUADROS & MONTEIRO-FILHO 2006.…”

mentioning

confidence: 99%

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