Consulta: subjectFacets:"Polygyny"
Registros recuperados: 5
Data/hora: 10/06/2024 12:01:38

Prediction of social structure and genetic relatedness in colonies of the facultative polygynous stingless bee Melipona bicolor (Hymenoptera, Apidae)
Provedor de dados: 74
Autores: Reis,Evelyze Pinheiro dos; Campos,Lucio Antonio de Oliveira; Tavares,Mara Garcia.
Stingless bee colonies typically consist of one single-mated mother queen and her worker offspring. The stingless bee Melipona bicolor (Hymenoptera: Apidae) shows facultative polygyny, which makes this species particularly suitable for testing theoretical expectations concerning social behavior. In this study, we investigated the social structure and genetic relatedness among workers from eight natural and six manipulated colonies of M. bicolor over a period of one year. The populations of M. bicolor contained monogynous and polygynous colonies. The estimated genetic relatedness among workers from monogynous and polygynous colonies was 0.75 ± 0.12 and 0.53 ± 0.16 (mean ± SEM), respectively. Although the parental genotypes had significant effects on genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona; Microsatellites; Polygyny; Queen number; Social structure.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200028

Does Land Abundance Explain African Institutions?
Provedor de dados: 31
Autores: Fenske,   James.
I show how abundant land and scarce labor shaped African institutions before colonial rule. I present a model in which exogenous suitability of the land for agriculture and endogenously evolving population determine the existence of land rights, slavery, and polygyny. I then use cross-sectional data on pre-colonial African societies to demonstrate that, consistent with the model, the existence of land rights, slavery, and polygyny occurred in those parts of Africa that were the most suitable for agriculture, and in which population density was greatest. Next, I use the model to explain institutions among the Egba of southwestern Nigeria from 1830 to 1914. While many Egba institutions were typical of a land-abundant environment, they sold land and had...
Tipo: Working or Discussion Paper
Palavras-chave: Africa; Institutions; Land rights; Slavery; Polygyny; Community/Rural/Urban Development; Farm Management; Institutional and Behavioral Economics; International Development; Land Economics/Use; Political Economy; N57; O10.
Ano: 2009
URL: http://purl.umn.edu/55707

THE MYSTERY OF MONOGAMY
Provedor de dados: 31
Autores: Gould,   Eric D.; Moav,   Omer; Simhon,   Avi.
This paper examines why developed countries are monogamous while rich men throughout history have tended to practice polygyny (multiple wives).  Wealth inequality naturally produces multiple wives for rich men in a standard model of the marriage market.  This paper argues that the sources of inequality, not just the level of inequality, determine the equilibrium degree of monogamy or polygamy.  In particular, when inequality is determined more by disparities in human capital versus non-labor income (such as land, capital, corruption), the outcome is more monogamous.  This explains why developed countries, where human capital is the main source of income and inequality, are monogamous while less-developed economies tend to be polygynous.  The results are...
Tipo: Working or Discussion Paper
Palavras-chave: Marriage; Monogamy; Polygyny; Human Capital; Inequality; J12; J24; O10; O40; Labor and Human Capital.
Ano: 2003
URL: http://purl.umn.edu/14992

Discrimination between workers of Acromyrmex subterraneus molestans from monogynous and polygynous colonies
Provedor de dados: 52
Autores: Souza,Danival José de; Lucia,Terezinha Maria Castro Della; Barbosa,Luiz Cláudio de Almeida.
Behavioral assays were conducted with individuals from monogynous and polygynous colonies of Acromyrmex subterraneus molestans to evaluate the discriminatory ability of ant workers. These bioassays showed that this subspecies could not discriminate among non-nestmates or nestmate workers. However, nestmates of these same colonies did discriminate among workers of another subspecies Ac. subterraneus subterraneus. When discrimation occurred there were no differences in the response of workers from either monogynous or polygynous colonies. Similarities or differences in the chemical profile of both subspecies explained the absence or occurence of aggressiveness among workers. The chemical profile of colonies of the same subspecies was very similar among them,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf-cutting ants; Nestmate discrimination; Polygyny.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000300013

Reproductive mechanisms in a Nasutitermes species (Isoptera: Termitidae)
Provedor de dados: 57
Autores: BUSCHINI,M. L. T.; LEONARDO,A. M. C.
The number of reproductive individuals present in colonies of Nasutitermes sp. was analysed, and its possible reproductive strategy discussed. Twenty-four nests were collected and opened, and a single queen and king were found in 17 of them. In the other 7 nests, no queen or king were neither found, nor any other reproductive individual. All quee ns were weighed, and the number of eggs laid by them was counted. No relationship between the volume of the nests and the weight of their respective queens was found, but the number of eggs laid by the queens during an hour was positively correlated to their weight .
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nasutitermes; Isoptera; Termitidae; Reproduction; Polygyny.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000400010