Parental Investment
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Multiple nesting attempts and long breeding seasons of Mimus gilvus (Aves: Mimidae) in southeastern Brazil
ABSTRACT This study describes aspects of the life history of the Tropical Mockingbird Mimus gilvus (Vieillot, 1808), including the breeding period, clutch size, nestlings and a list of plants used for nesting. Nests were monitored in an area of Restinga (sand-coastal plain) habitat in a protected area in southeastern Brazil. The data from 181 nests during fi
Zoologia (Curitiba). Publicado em: 06/06/2019
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2. Investimento parental e papéis sexuais em opiliões com cuidado paternal exclusivo / Parental investment and sex roles in harvestmen with exclusive paternal care
Exclusive paternal care is the rarest form of post-zygotic parental investment in nature, which has independently evolved in no more than 14 arthropod lineages. Although many of those species are easily observed and manipulated, only recently researchers have started to pay attention and test hypotheses on parental investment and evolution of sex roles in su
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/06/2012
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3. Reproductive biology of Sciades herzbergii (Siluriformes: Ariidae) in a tropical estuary in Brazil
The present study investigated the reproductive biology of Sciades herzbergii in the Paraíba do Norte River Estuary, Brazil. We aimed to characterize the reproduction of the species with respect to sex ratio, spawning season, condition factor and length at first maturity. Specimens were captured between August 2009 and July 2010 in a stretch of the main cha
Zoologia (Curitiba). Publicado em: 2012-10
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4. Cuidado maternal no opilião Neosadocus maximus (Arachnida: Opiliones) / Maternal care in the harvestman Neosadocus maximus (Arachnida: Opiliones)
Muitas formas de cuidado parental aumentam a sobrevivência da prole, ao custo de uma diminuição na capacidade dos pais em investir em proles futuras. Espera-se, portanto, que indivíduos parentais adotem estratégias de cuidado que lhes permitam balancear benefícios imediatos e custos futuros, otimizando seu sucesso reprodutivo total. Nesta dissertação
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/05/2011
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5. Sex-dependent foraging effort and vigilance in coal-crested finches, Charitospiza eucosma (Aves: Emberizidae) during the breeding season: evidence of female-biased predation?
Sexual dimorphism in birds is often attributed to sexual selection, but another interpretation suggests the evolution of this phenomenon by natural selection. Predation may be an important selective pressure, acting mainly on females. In this study, I tested the latter hypothesis on the coal-crested finch (Charitospiza eucosma Oberholser, 1905) in a neotropi
Zoologia (Curitiba). Publicado em: 2011-04
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6. Aspectos evolutivos da depressão pós-parto e fatores associados / Evolutionary apects of postnatal depression and associated factors
A depressão pós-parto (DPP) é uma condição prevalente que afeta globalmente as mulheres puérperas. Uma hipótese evolutiva aborda a depressão, e consequentemente a DPP, como uma resposta proveniente da evolução do comportamento humano ao longo da História, através da seleção natural. A teoria do investimento parental sugere que os pais não inve
Publicado em: 2011
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7. Biologia reprodutiva de Vanellus chilensis (Aves: Charadriidae) : por que reproduzir em grupo?
It has been recently demonstrated that females can reduce their egg investment without incurring costs onto the developing embryos. This happens when females breed in the presence of helpers-at-the-nest that compensate for the egg nutrient reduction by bringing more food for the chicks. Using the southern lapwing (Vanellus chilensis) as the study subject, th
Publicado em: 2009
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8. Sócio-sexualidade e desconto do futuro: mecanismo de alocação de investimentos e tomada de decisão / Sociosexuality and Discount of the Future: decision making and investment allocation mechanism
Could Future Discounting and Sexual Strategies result of a common cognitive mechanism of investment allocation? Future Discounting refers to the fact that people (and other organism) usually prefer to consume and acquire resources in a more imminent way than wait for a uncertain future, involving impulsivity and risky behavior (Daly &Wilson, 2001). Sexual St
Publicado em: 2009
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9. Motivações para adoção: uma perspectiva da Psicologia Evolucionista
Parental investment increases the offsprings survival, though it decreases the opportunities for the parents to invest in a future progeny. In a broad sense, this investment is directed to ones own descendant, but in some cases, such as in adoption, resources are directed to non-relatives even in the absence of fitness benefits. Once there are many factors i
Publicado em: 2007
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10. "O avunculado na Antropologia Evolutiva: uma abordagem intercultural" / "The avunculate in the evolutionary anthropology: a cross cultural survey"
The present work proposes to account for cultural variability in connection to human family organization, through Darwins theories of natural selection and sexual selection. It is also founded on evidence based on the comparison of ethnographic data of diverse human societies. It intends to demonstrate that there is a significant alteration in the behavior
Publicado em: 2007
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11. Seleção de sítio de oviposição pelo opilião bromelícola Bourguyia hamata (Arachnida: Opiliones) em uma área de restinga no sudeste do Brasil / Oviposition site selection by the bromelicolous harvestman Bourguyia hamata (Opiliones: Gonyleptidae) in a sandy coastal forest in southeastern Brazil
A escolha do sítio de oviposição pode ter várias implicações no desenvolvimento da prole e na aptidão da fêmea. As fêmeas do opilião Bourguyia hamata exibem cuidado maternal e utilizam exclusivamente a bromélia Aechmea nudicaulis como sítio de oviposição na Ilha do Cardoso, SP. Neste estudo investigou-se se características arquiteturais de A.
Publicado em: 2006
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12. Cuidado parental de Sula leucogaster (Boddaert) (Aves, Pelecaniformes, Sulidae) nas Ilhas dos Currais, Paraná, Brasil
In Sula leucogaster (Boddaert, 1783) it happens a brood reduction from two to one egg. The eggs hatch asynchronously and it is rare for the second chick to survive for long. A quantify parental investment is proposed and the differences between males and females of Sula leucogaster is verified for to help to understand the brood reduction. The studies were c
Revista Brasileira de Zoologia. Publicado em: 2003-12