Fluctuating Asymmetry
Mostrando 1-12 de 30 artigos, teses e dissertações.
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1. Patterns of growth, development and herbivory of Palicourea rigida are affected more by sun/shade conditions than by Cerrado phytophysiognomy
ABSTRACT Plant development is influenced by several abiotic factors, which in turn influence morphological traits and life history. We investigated whether leaf area, herbivory, toughness, fluctuating asymmetry, structural complexity and the number of inflorescences of Palicourea rigida are influenced by sun/shade conditions or by Cerrado phytophysiognomy (t
Acta Bot. Bras.. Publicado em: 2017-06
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2. Effect of Egg Weights on Hatching Results, Broiler Performance and Some Stress Parameters
ABSTRACT The present study was conducted to investigate the effect of hatching egg weight of broiler parent stocks on hatching results, chick performance, carcass characteristics, internal organ weights and some blood stress parameters. Eggs were divided into 3 egg weight groups (55.0 to 60.0 g (light), 60.1 to 65.0 g (medium) and 65.1 to 70.0 g (heavy)) for
Rev. Bras. Cienc. Avic.. Publicado em: 2017-06
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3. Dental anomalies in Didelphis albiventris (Mammalia, Marsupialia, Didelphidae) from Argentina, Brazil and Uruguay
ABSTRACT Dental anomalies have been investigated and reported for most orders of mammals, including marsupials. Previous works in Didelphis albiventris Lund, 1840 only described one kind of malformation or just a few observations from some collections, thus the type and presence of anomalies for this species was underestimated. The aim of this contribution i
Iheringia, Sér. Zool.. Publicado em: 20/10/2016
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4. Leaf phenotypic variation and developmental instability in relation to different light regimes
ABSTRACT For pioneer plants, shaded habitats represent a stressful condition, where sunlight exposure is below the optimum level and so leaves expand in order to intercept a greater amount of light. We investigated changes in both phenotypic variation and stress of Bauhinia brevipes in sunny and shaded microhabitats. Leaf area was used as a measure of phenot
Acta Bot. Bras.. Publicado em: 2016-06
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5. Constant fluctuating asymmetry but not directional asymmetry along the geographic distribution of Drosophila antonietae (Diptera, Drosophilidae)
ABSTRACT The population dynamics of a species tends to change from the core to the periphery of its distribution. Therefore, one could expect peripheral populations to be subject to a higher level of stress than more central populations (the center–periphery hypothesis) and consequently should present a higher level of fluctuating asymmetry. To test these
Rev. Bras. entomol.. Publicado em: 2015-12
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6. Fluctuating asymmetry of and herbivory on Poincianella pyramidalis (Tul.) L.P. Queiroz (Fabaceae) in pasture and secondary tropical dry forest
Plants subjected to stressful environments tend to be more asymmetric with reduced defenses and are therefore more vulnerable to herbivory. This study investigates the relationship between herbivory and fluctuating asymmetry (FA) in Poincianella pyramidalis in two contrasting habitat types in the Brazilian caatinga (shrublands). We tested the following hypot
Acta Bot. Bras.. Publicado em: 2013-03
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7. Assimetria flutuante em aves de ambientes florestais no Cerrado mineiro / Fluctuating asymmetry in birds of forest habitat in the Cerrado of Minas Gerais
As ações antrópicas provocam alterações drásticas na estrutura e composição das florestas, o que reflete diretamente na fauna dependente desta vegetação para explorar seus recursos alimentares. As aves respondem a essas alterações, sendo excelentes indicadores da qualidade ambiental e ferramentas importantes para compreensão e monitoramento das
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/02/2012
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8. Broiler walking ability and toe asymmetry under harsh rearing conditions
Morphological asymmetry has been described as a potential broiler welfare indicator, for interpreting the birds' ability to cope with the challenges that may affect its growth. The objective of this study was to evaluate the use of morphological asymmetry data to estimate broiler walking ability and welfare.dBroilers werefed diets supplemented or not with vi
Rev. Bras. Cienc. Avic.. Publicado em: 2012-09
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9. Body size, symmetry and abundance of Euxesta stigmatias (Loew) and Euxesta sororcula (Wiedemann) (Diptera: Ulidiidae) in a natural reserve and in a guava orchard in Uberlândia, MG, Brazil
The aim of this study was to comparatively characterize the monthly variation and the sex ratio of Euxesta stigmatias (Loew) and Euxesta sororcula (Wiedermann) populations from a natural reserve and from a guava orchard. It was also investigated whether density and the climate factors affected the individuals' size and fluctuating asymmetry (FA). In both env
Neotropical Entomology. Publicado em: 2011-12
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10. Asymmetry of frontal bristles and postocular setae in species and hybrids of the Anastrepha fraterculus complex (Diptera, Tephritidae)
Asymmetry of the frontal bristles and postocular setae was studied in samples from natural populations and laboratory colonies of Anastrepha sp. 1 aff. fraterculus, of A. sp. 2 aff. fraterculus, and in F1 hybrids obtained from laboratory reciprocal crosses. Natural populations were sampled in a zone of sympatry and in two geographically distant regions with
Genetics and Molecular Biology. Publicado em: 2007
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11. Courtship behavior and sexual selection determined by size and symmetry in Dysdercus maurus Distant, 1901 (Hemiptera: Pirrhocoridae) / Comportamento de corte e cópula e papel do tamanho e simetria na seleção sexual de Dysdercus maurus Distant, 1901 (Hemiptera: Pirrhococoridae)
This study investigated the hole of size and corporal symmetry in the sexual selection of D. maurus, an insect-plague responsible for serious economic injuries in cotton cultures. Aspects of the courtship and mating behavior of this species were also described. In order to obtain the morphometric measurements, 30 single males and 30 couples were used for sli
Publicado em: 2007
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12. Mudanças fisiológicas, morfológicas e comportamentais em Zabrotes subfasciatus (Boheman) (Coleoptera, Bruchidae) associadas ao consumo de diferentes variedades de feijão (Phaseolus vulgaris L.) / Physiologic, Morphologic and Behavioural Changes in Zabrotes subfasciatus (Boheman) (Coleoptera, Bruchidae) Related at Diferents Beans Varieties (Phaseolus vulgaris L.)
A plasticidade fenotípica define a habilidade do organismo em modificar sua fisiologia/morfologia em resposta às condições ambientais, sem que mudanças genéticas sejam necessárias (Scheiner). Este estudo foi desenvolvido para verificar mudanças fisiológicas, morfológicas e comportamentais em duas diferentes populações de Zabrotes subfasciatus (Bo
Publicado em: 2007