Sexual size dimorphism in Myotis nigricans (Schinz, 1821) (Chiroptera: Vespertilionidae) from south Brazil

Bornholdt, Renata; Oliveira, Larissa Rosa de; Fabián, Marta Elena

doi:10.1590/s1519-69842008000400028

Cited by 11 publications

(13 citation statements)

References 28 publications

(41 reference statements)

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“…Además, numerosos estudios han demostrado que dichas medidas biométricas pueden sufrir variaciones geográficas (Albayrak & Coşkun 2000, Bornholdt et al 2008, pueden revelar la existencia de un dimorfismo sexual (Benda 1994, Lindenfors et al 2007) y pueden estar influidas por las condiciones ambientales durante el desarrollo del individuo (Paz 1986;Zahn et al 2006;Dietz et al 2007). Por otro lado, la longitud y anchura de las alas tiene importantes implicaciones en la aerodinámica de los individuos (Findley et al 1972, Norberg & Rayner 1987, Blood & McFarlane 1988, Fenton 1990) y estos datos pueden contribuir a explicar cuestiones ecológicas para especies muy similares (Norberg & Rayner 1987;Bogdanowicz et al 1999;Salsamendi et al 2005;Dietz et al 2006).…”

Section: Discussionunclassified

“…Además, se ha observado que dentro de una misma especie de murciélago, pueden existir variaciones geográficas (ej. Paz 1995, Arlettaz et al 1997, Albayrak & Coşkun 2000, Bornholdt et al 2008, Furman et al 2011) e incluso un dimorfismo sexual acusado (Benda 1994). En este trabajo, se aportan datos biométricos de 5 especies de murciélagos presentes en la Región de Murcia (SE España) que constituyen una valiosa información sobre la morfología de estos mamíferos en la Península Ibérica.…”

Section: Introductionunclassified

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Datos biométricos de cinco especies de murciélagos (Mammalia: Chiroptera) de la Región de Murcia (SE España)

Lisón¹

2012

analesbio

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En los murciélagos, las medidas alares son elementos clave para identificar las especies y tienen serias implicaciones en su ecología. No obstante, dichas medidas pueden sufrir variaciones geográficas en el rango de distribución de las especies y en otros casos, puede existir un marcado dimorfismo sexual. En este trabajo se aportan las medidas alares de 5 especies de murciélagos de la Región de Murcia, con un total de 312 individuos analizados. Los resultados confirman que los individuos de nuestra región tienen medidas biométricas dentro del rango de variación de la especie, aunque para algunos valores se ha encontrado que los individuos de Murcia difieren en sus medidas de otros individuos ibéri-cos. Por otro lado, los resultados confirman la presencia de dimorfismo sexual para las medidas alares en Miniopterus schreibersii. Este trabajo resalta la necesidad de tener un mayor número de datos sobre biometría de los murciélagos ibéricos. Abstract Biometric data of five bats species (Mammalia: Chiroptera) of the Region of Murcia (SE Spain)For bats, wing measurements are key elements for the identification of species and they have serious implications in the ecology of species. However, these measurements can suffer geographical variations inside the distribution of a species and, in other cases, sexual dimorphism happens. In this study, I am contributing with the wing measurement of five bats species on the Region of Murcia (SE, Spain), analysing a total amount of 312 individuals. Theses results confirm that the biometric measurements of our region's bats are within the variation species range, although there are differences in some measurements respect other Iberian bats. In the other hand, my results show the presence of sexual size dimorphism for wing measurements in Miniopterus schreibersii. It is necessary to have more data of biometry of Iberia bats.Key words: Biometry, Rhinolophus ferrumequinum, Myotis spp., Miniopterus schreibersii, Plecotus austriacus. IntroducciónEn los murciélagos, las medidas de las extremidades delanteras tienen valor diagnóstico para la identificación de las especies, ya que la longitud y la anchura del ala tienen importantes implicaciones en la aerodinámica de estos mamíferos voladores y por lo tanto, en muchos aspectos ecológi-

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Section: Discussionunclassified

Section: Introductionunclassified

Datos biométricos de cinco especies de murciélagos (Mammalia: Chiroptera) de la Región de Murcia (SE España)

Lisón¹

2012

analesbio

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“…3), but the interaction with body variables is not significant Sensory structure in a monomorphic bat 79 dimorphism as it predicts larger female body size in spe cies when females perform parental care (Ralls, 1976;Myers, 1978;Williams and Findley, 1979;Willig et al, 1986;Solick and Barclay, 2006;Bornholdt et al, 2008;Camargo and de Oliveira, 2012;Stevens et al, 2013). Nevertheless, differences in the sexes may be limited to traits involved in foraging strategy rather than those that affect whole body size.…”

Section: Nose-leaf Morphometric Variablesmentioning

confidence: 99%

Sexual Size Dimorphism of a Sensory Structure in a Monomorphic Bat

Hurtado

Sepúlveda

Pacheco

2015

Acta Chiropterologica

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As a strategy to reserve energy for parental care, females are larger than males in most bat species. Although females are responsible for providing parental care in almost all (if not all) bats, there are some species in which the males are larger than the females, and in other species the sexes are similarly sized. It has been proposed that for non dimorphic bat species, some foraging traits might be responsible for the differences observed between the sexes, though, this hypothesis has not been tested formally. Here, we evaluate the sexual size dimorphism of the phyllostomid insectivorous bat Gardnerycteris crenulatum using the morphometric variables of body size and nose-leaf size; the latter is a functional structure that plays an important role in echolocation and determines insectivorous bats' effectiveness in foraging. Our results show that G. crenulatum is a sexually monomorphic species in terms of body size, but it is dimorphic in nose-leaf traits. Females exhibit larger nose-leaves than males, which could increase the directionality of their ultrasound emission and hence improve the females' ability to obtain sensory information. We propose that monomorphic bats could be dimorphic for functional structures related to foraging behaviour as a means to increase their energetic effectiveness.

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“…El dimorfismo sexual en murciélagos se ha relacionado con diferencias tróficas asociadas a la capacidad de carga durante el vuelo, la segregación de nichos y la fecundidad (Bornholt et al 2008, Camargo & de Oliveira 2012, Lisón et al 2014). …”

Section: Diferencias Entre Sexosunclassified

Asimetría cráneo-mandibular de Artibeus lituratus (Chiroptera, Phyllostomidae) en Colombia

López‐Aguirre

Pérez‐Torres

2014

Univ. Sci.

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Analyzing asymmetry in species associated with disturbed environments enables the evaluation of the morphological plasticity of generalistic species and the different evolutionary responses of sexes or populations to environmental or genetic stress. This report is a study of the cranial and mandibular asymmetry of Colombian Artibeus lituratus. This species has a wide distribution and high abundance, but its morphological plasticity remains uncertain. We characterized its presence, fluctuating asymmetry, directional asymmetry and antisymmetry by measuring 11 craneometric traits in 146 adults from different localities. Fluctuating asymmetry was present in all traits; directional asymmetry and antisymmetry in three; and no measurement error in any trait. Females showed more fluctuating asymmetry in the splachnocranium and males in the neurocranium. Traits with functional importance while biting had lower levels of asymmetry and higher similarity. Traits with antisymmetry did not show association while traits with directional asymmetry showed mandibular association. We discuss the relation between the presence of cranial and mandibular asymmetry, with the functional similarity of different traits.

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Sexual size dimorphism in Myotis nigricans (Schinz, 1821) (Chiroptera: Vespertilionidae) from south Brazil

Cited by 11 publications

References 28 publications

Datos biométricos de cinco especies de murciélagos (Mammalia: Chiroptera) de la Región de Murcia (SE España)

Datos biométricos de cinco especies de murciélagos (Mammalia: Chiroptera) de la Región de Murcia (SE España)

Sexual Size Dimorphism of a Sensory Structure in a Monomorphic Bat

Asimetría cráneo-mandibular de Artibeus lituratus (Chiroptera, Phyllostomidae) en Colombia

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