Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)

Two methods of measurement of bullar dimensions (callipers and scaling from digital images) and subsequent application of four volume formulae (rectangular prism, cylinder, ellipse and elliptical cone) were tested to find the most appropriate non-destructive method for estimating the bullar volume i...

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Autores principales:	Basso,Ana Paula, Sidorkewicj,Nora Silvia, Casanave,Emma Beatriz
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2017
Materias:	Fossorial mammals Armadillos Middle ear Auditory bulla Non-destructive methods
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100021
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spelling	oai:scielo:S0717-950220170001000212017-04-18Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)Basso,Ana PaulaSidorkewicj,Nora SilviaCasanave,Emma Beatriz Fossorial mammals Armadillos Middle ear Auditory bulla Non-destructive methods Two methods of measurement of bullar dimensions (callipers and scaling from digital images) and subsequent application of four volume formulae (rectangular prism, cylinder, ellipse and elliptical cone) were tested to find the most appropriate non-destructive method for estimating the bullar volume in Chaetophractus villosus. Material for the study consisted in clean adult skull (n=22). Real volume was obtained from latex casts of the tympanic bulla. Each estimation was corrected by a factor based on the differences between the estimated and the real volumes. Highest accuracy (5-7 % of underestimation) and precision (coefficient of variation: 13.27 %) were obtained from callipers and application of rectangular prism, cylinder and ellipse formulae. The corresponding correction factors were 0.31, 0.39 and 0.58, respectively.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.35 n.1 20172017-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100021en10.4067/S0717-95022017000100021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Fossorial mammals Armadillos Middle ear Auditory bulla Non-destructive methods
spellingShingle	Fossorial mammals Armadillos Middle ear Auditory bulla Non-destructive methods Basso,Ana Paula Sidorkewicj,Nora Silvia Casanave,Emma Beatriz Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
description	Two methods of measurement of bullar dimensions (callipers and scaling from digital images) and subsequent application of four volume formulae (rectangular prism, cylinder, ellipse and elliptical cone) were tested to find the most appropriate non-destructive method for estimating the bullar volume in Chaetophractus villosus. Material for the study consisted in clean adult skull (n=22). Real volume was obtained from latex casts of the tympanic bulla. Each estimation was corrected by a factor based on the differences between the estimated and the real volumes. Highest accuracy (5-7 % of underestimation) and precision (coefficient of variation: 13.27 %) were obtained from callipers and application of rectangular prism, cylinder and ellipse formulae. The corresponding correction factors were 0.31, 0.39 and 0.58, respectively.
author	Basso,Ana Paula Sidorkewicj,Nora Silvia Casanave,Emma Beatriz
author_facet	Basso,Ana Paula Sidorkewicj,Nora Silvia Casanave,Emma Beatriz
author_sort	Basso,Ana Paula
title	Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
title_short	Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
title_full	Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
title_fullStr	Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
title_full_unstemmed	Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)
title_sort	methods for estimating the volume of the tympanic bulla in the big hairy armadillo chaetophractus villosus (mammalia, xenarthra, dasypodidae)
publisher	Sociedad Chilena de Anatomía
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022017000100021
work_keys_str_mv	AT bassoanapaula methodsforestimatingthevolumeofthetympanicbullainthebighairyarmadillochaetophractusvillosusmammaliaxenarthradasypodidae AT sidorkewicjnorasilvia methodsforestimatingthevolumeofthetympanicbullainthebighairyarmadillochaetophractusvillosusmammaliaxenarthradasypodidae AT casanaveemmabeatriz methodsforestimatingthevolumeofthetympanicbullainthebighairyarmadillochaetophractusvillosusmammaliaxenarthradasypodidae
_version_	1718444991278219264

Methods for Estimating the Volume of the Tympanic Bulla in the Big Hairy Armadillo Chaetophractus villosus (Mammalia, Xenarthra, Dasypodidae)

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