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Showing 1 to 20 of 42 for “"Chiroptera"”.
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Biologia reprodutiva de Artibeus lituratus (Olfers, 1818) (Chiroptera: Phyllostomidae)
Some aspects of the reproductive biology of Artibeus lituratus are reported. The bats examined were collected monthly at the Estação Florestal Experimental Eng. Agr. Mario Xavier located at the Antiga Estrada Rio - São Paulo, Km 51, Seropedica, RJ. Histological sections were obtained from vagina, …
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Factors affecting the activity patterns of Myotis tricolor (Chiroptera: Vespertilionidae)
Foraging behaviour is an important component of an animal’s ecology. Increases in energetic costs associated with reproduction, should have marked effects on foraging behaviour, but may be compounded by the effects of environmental factors. I investigated the activity patterns of female M. tricolor …
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Food odour preference behaviour in three Australian Pteropus species (Chiroptera: Pteropodidae)
… olfactory preferences of three Australian Megachiropteran species, Pteropus poliocephalus, P. scapulatus and P. alecto, for a variety of plant-derived odours. Methodologies were devised for investigating odour preference behaviour, involving equipment design, development of new applications for …
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Food odour preference behaviour in three Australian Pteropus species (Chiroptera: Pteropodidae)
… olfactory preferences of three Australian Megachiropteran species, Pteropus poliocephalus, P. scapulatus and P. alecto, for a variety of plant-derived odours. Methodologies were devised for investigating odour preference behaviour, involving equipment design, development of new applications for …
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Environmental factors influencing the distribution of bats (Chiroptera) in South Africa
Environmental factors limiting the distribution of 37 of the 56 bat species in a warm temperate region (South Africa) were determined using GIS software and the Maximum Entropy modelling technique (MaxEnt). Undertaking such a study in a warm temperate region like South Africa is essential as the …
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Evolution and functional specializations in nocturnal environments: insights from visual pigments in Chiroptera
… resurrect the ancestral rhodopsin pigment of Chiroptera and Scrotifera. I find that changes in rhodopsin kinetics occurred during the evolution of bats are likely associated with the origins of echolocation. This thesis combines in vitro and in silico approaches to investigate visual pigment …
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Habitat correlates of pulse parameters in the highly specialised acoustic system of Chiroptera
High Duty Cycle echolocating bats use high frequency echolocation pulses that have limited range but are clutter resistant i.e. can detect targets in dense clutter (the number of echoes produced other than those from the target of interest). A specialised echolocation pulse design (consisting of a …
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The assemblages, fitness and movements of bats (chiroptera, vespertilionidae and rhinolophidae) in the urban matrix
In this study I examine the assemblages, morphometric differences and movements of bats in urban and suburban green spaces within Birmingham and the Black Country in the West Midlands, UK. This was achieved by undertaking 111 Advanced Bat Licence Surveys at 16 trapping sites, and 91 activity and …
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Morfologia comparada do estômago e da junção gastroduodenal de morcegos da família Phyllostomidae (Mammalia, Chiroptera)
… stomach and gastroduodenal junction of 80 microchiropteran specimens. Standard staining and histochemical procedures were employed. Sections were examined under light microscopy and photomicrographies were taken using a video microscope. Line drawings were made for recording gross morphological …
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Geographic variation in the phenotype of an African horseshoe bat species, Rhinolophus damarensis, (Chiroptera: Rhinolophidae)
Studies involving geographic variation in the phenotypes of bats help scientists to explain why these mammals are the most species rich mammalian order second only to rodents, with well more than 1 300 species occurring worldwide. Such species richness or high diversity is the manifestation of the …
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The relationship between niche breadth and geographic range size in African Horseshoe bats (Rhinolophidae, Chiroptera)
According to Brown's hypothesis, generalists have high niche breadth and can tolerate a wide variety of environmental conditions resulting in large geographic range sizes. Conversely, specialists have low niche breadth and small range sizes. I tested this hypothesis using African Horseshoe bats to …
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Sensory divergence among populations of a southern African endemic horseshoe bat (Chiroptera: Rhinolophidae ): a multidisciplinary approach
A fundamental goal of evolutionary biology is to understand how natural selection, random genetic drift and gene flow interact to promote adaptive trait divergence within species. Environmental gradients are ideal opportunities for disentangling the relative effects of selection and gene flow in …
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Geographic variation in the echolocation calls of the endemic Cape horseshoe bat, Rhinolophus capensis (Chiroptera: Rhinolophidae)
Several intrinsic (body size) and extrinsic (foraging ecology and communication) factors are suggested to influence call frequency divergence in high duty-cycle bats. Investigating these factors within the framework of established hypotheses would contribute to understanding evolutionary changes …
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NEOICHNOLOGY OF BATS: MORPHOLOGICAL, ECOLOGICAL, AND PHYLOGENETIC INFLUENCES ON TERRESTRIAL BEHAVIOR AND TRACKMAKING ABILITY WITHIN THE CHIROPTERA
Among living mammals, bats (Chiroptera) are second only to rodents in total number of species with over 1100 currently known. Extant bat species occupy many trophic niches and feeding habits, including frugivores (fruit eaters), insectivores (insect eaters), nectarivores (nectar and pollen-eaters), …
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Ecologia alimentar de morcegos insetívoros de área urbana do município do Rio de Janeiro, RJ (Mammalia: Chiroptera)
… the same time, this data suggest the species of Chiroptera do not compete for food resources. A possible explanation is that they feed on insects of different sizes which may also fly at different altitudes.
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Diversidade de Chiroptera do quaternário de Serra da Mesa (GO) com ênfase na morfologia do aparelho mastigatório
Evaluate the taxonomic diversity of fossil bats (Chiroptera) from the region of the Serra da Mesa in the State of Goias, Central Brazil. Quaternary fossils were obtained from four limestone caves, namely Igrejinha, Carneiro, Nossa Senhora Aparecida, and ltambé. The taxonomic identification of the …
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Efeitos da sazonalidade sobre o metabolismo energético do morcego frugívoro Sturnira lilium (Chiroptera: Phyllostomidae) em fragmento de Mata Atlântica
Pouco se conhece a respeito da variação sazonal de armazenamento ou mobilização de reservas energéticas em espécies de morcegos neotropicais. Este estudo teve por objetivo avaliar a influência da sazonalidade sobre as reservas energéticas da espécie Sturnira lilium em fragmentos de Mata Atlântica …
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Geographic distribution and composition of the parasite assemblage of the insectivorous bat, Miniopterus natalensis (Chiroptera: Miniopteridae), in South Africa
All free-living animal species have their own unique parasite assemblages. These parasites can have a significant impact on the fitness and ecology of their hosts, and through them the ecological systems in which they occur. Gaining knowledge about these parasites offers important information on …
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The role of echolocation in communication in a high duty cycle echolocating bat, Rhinolophus clivosus (Chiroptera: Rhinolophidae): an experimental approach
Acoustic communication plays a pivotal role in species recognition across a number of taxa. Species must therefore maintain discrete acoustic signatures to facilitate communication and avoid misidentification. The Acoustic Communication Hypothesis (ACH) thus proposes that in multispecies …
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