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| Caparroz,Renato; Miyaki,Cristina Y.; Baker,Allan J.. |
| More than 90% of birds are socially monogamous, although genetic studies indicate that many are often not sexually monogamous. In the present study, DNA fingerprinting was used to estimate the genetic relationships between nestlings belonging to the same broods to evaluate the mating system in the socially monogamous macaw, Ara ararauna. We found that in 10 of 11 broods investigated, the nestlings showed genetic similarity levels congruent with values expected among full-sibs, suggesting that they shared the same parents. However, in one brood, the low genetic similarity observed between nestlings could be a result of intraspecific brood parasitism, intraspecific nest competition or extra-pair paternity. These results, along with available behavioral and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ara ararauna; Breeding behavior; DNA fingerprinting; Monogamy; Psittacidae. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100027 |
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| Jones, D.N.. |
| An evolutionary understanding of the complex mating systems of megapodes has been impaired by a historical and simplistic classification system that assumed all species to be monogamous. This approach has been challenged by behavioural ecology theories that emphasize the primacy of the individual attempt to maximize its own fitness. From this point of view the remarkable incubation techniques and the recently described behaviours of some clearly promiscuous species can be more clearly understood. In particular, the influence of the type of incubation-heat source on the mating system is paramount. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Megapodiidae; Mating systems; Monogamy; Promiscuity.; 42.83. |
| Ano: 1992 |
URL: http://www.repository.naturalis.nl/record/317668 |
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| Verba,Júlia Tovar; Rabello Neto,José Gurgel; Zuanon,Jansen; Farias,Izeni. |
| Monogamy is rare in fishes and is usually associated with elaborate parental care. When parental care is present in fishes, it is usually the male that is responsible, and it is believed that there is a relationship between the high energetic investment and the certainty of paternity (except in the case of sneaker males). Osteoglossum bicirrhosum is considered a monogamous fish, and has particular behavioral traits that permit the study of mating systems and parental care, such as male mouthbrooding. We investigated the genetic relationships of males with the broods found in their oral cavities in Osteoglossum samples collected in a natural environment in the lower Purus river basin, Amazonas, Brazil. Fourteen broods were analyzed for parentage (268 young... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cooperative parental care; Microsatellite; Monogamy; Mouthbrooding. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100145 |
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| 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 |
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| García-Ulloa,Diego; Landa-Jaime,Víctor; Góngora-Gómez,Andrés Martín; García-Ulloa,Manuel; Hernández-Sepúlveda,Juan Antonio. |
| ABSTRACT Symbiosis between decapods and mollusks provides a unique opportunity to examine some of the evolutionary strategies employed by marine invertebrates. We describe the sexual and reproductive traits of the pearl oyster shrimp, Pontonia margarita Verril, 1869, found symbiotically inhabiting the mantle cavity of the rugose pen shell, Pinna rugosa Sowerby, 1835. Solitary males and females (ovigerous and non-ovigerous) and heterosexual pairs (with ovigerous and non-ovigerous females) were found in a total of 47 rugose pen shells collected from a sandy area with seagrass meadows on the southeastern coast of the Gulf of California, Mexico. The body length (BL) of female P. margarita was correlated with the shell volume of their rugose pen shell host. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Monogamy; Promiscuity; Reproduction; Sex ratio; Shrimp-pen shell association. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100312 |
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