Dominance Hierarchy
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Neuroimunes aspects of mice kept in a stable social relation / Aspectos neuroimunes de camundongos mantidos em uma relação social estável
The objective of the present work was to investigate the repercussions of a stable social relationship on different parameters of the behavior, neurochemical and immune activity of dominant and submissives mice. Adult males (with approximately 90 days of age) kept in pairs since wean it, had been determined as dominant or submissives, after three consecutive
Publicado em: 2006
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14. Estruturação genética em populações do tangará-dançarino Chiroxiphia caudata (Aves, Pipridae) no corredor costeiro da Mata Atlântica (SP) e sua importância para a conservação.
Neotropical passerine birds that inhabit forests understory are thought to be highly sedentary, which may result in greater genetic differentiation among populations than in temperate species. The species of the genus Chiroxiphia (Pipridae) perform highly specialized courtship displays in which males aggregate at traditional arenas, or ``leks, performing a p
Publicado em: 2005
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15. Eye color as an indicator of social rank in the fish Nile tilapia
We investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired 20 size-matched fish (intruder: 73.69 ± 11.49 g; resident: 75.42 ± 8.83 g) and evaluated eye color and fights. These fish were isolate
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-12
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16. Evolutionary Dynamics of Sporophytic Self-Incompatibility Alleles in Plants
The stationary frequency distribution and allelic dynamics in finite populations are analyzed through stochastic simulations in three models of single-locus, multi-allelic sporophytic self-incompatibility. The models differ in the dominance relationships among alleles. In one model, alleles act codominantly in both pollen and style (SSIcod), in the second, a
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17. Single- and multilocus DNA fingerprinting of communally breeding pukeko: do copulations or dominance ensure reproductive success?
In behavioral and ecological studies the "function" of dominance hierarchies is thought to be related to reproductive success. In particular, dominant males are regarded as likely to gain a reproductive advantage due to enhanced "access" to females. We compare the dominance status of adults with the frequency of copulations and the patterns of parentage in c
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18. Polytenization of the Ribosomal Genes on the X and Y Chromosomes of DROSOPHILA MELANOGASTER
It has previously been shown (Endow and Glover 1979), that polytenization of the ribosomal genes in D. melanogaster Ore-R X/Y cells and in hybrid X/X cells (Endow 1980) involves replication of genes predominantly from one of the cell's two nucleolus organizers. This analysis takes advantage of strain-specific differences in X and Y chromosome rDNA hybridizat
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19. Individual differences versus social dynamics in the formation of animal dominance hierarchies
Linear hierarchies, the classical pecking-order structures, are formed readily in both nature and the laboratory in a great range of species including humans. However, the probability of getting linear structures by chance alone is quite low. In this paper we investigate the two hypotheses that are proposed most often to explain linear hierarchies: they are
National Academy of Sciences.
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20. Covariance of Inbred Relatives with Special Reference to Selfing
The covariance of inbred relatives from a population in linkage and identity equilibrium in the presence of dominance and epistasis is formulated using a similar procedure to that which B. S. Weir and C. C. Cockerham used to derive a general expression for the genotypic variance. An alternative model based on the description of a genotype in terms of the ho
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21. Competitive Dominance among Strains of Luminous Bacteria Provides an Unusual Form of Evidence for Parallel Evolution in Sepiolid Squid-Vibrio Symbioses
One of the principal assumptions in symbiosis research is that associated partners have evolved in parallel. We report here experimental evidence for parallel speciation patterns among several partners of the sepiolid squid-luminous bacterial symbioses. Molecular phylogenies for 14 species of host squids were derived from sequences of both the nuclear intern
American Society for Microbiology.
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22. Epitope Specificity and Relative Clonal Abundance Do Not Affect CD8 Differentiation Patterns during Lymphocytic Choriomeningitis Virus Infection▿
To evaluate the impact of immunodominance on CD8 T-cell properties, we compared the functional properties of dominant and subdominant populations in the response to lymphocytic choriomeningitis virus (LCMV). To improve functional discrimination, in addition to the usual tests of phenotype and function, we used a sensitive technique that allows the screening
American Society for Microbiology (ASM).
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23. A Pacific Culture among Wild Baboons: Its Emergence and Transmission
Reports exist of transmission of culture in nonhuman primates. We examine this in a troop of savanna baboons studied since 1978. During the mid-1980s, half of the males died from tuberculosis; because of circumstances of the outbreak, it was more aggressive males who died, leaving a cohort of atypically unaggressive survivors. A decade later, these behaviora
Public Library of Science.
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24. Microarray analysis of gene expression in lupus
Recent advances in the study of global patterns of gene expression with the use of microarray technology, coupled with data analysis using sophisticated statistical algorithms, have provided new insights into pathogenic mechanisms of disease. Complementary and reproducible data from multiple laboratories have documented the feasibility of analysis of heterog
BioMed Central.