Cooperative Breeding
Mostrando 1-12 de 20 artigos, teses e dissertações.
-
1. BRS Valente: nova cultivar de feijoeiro comum do grupo comercial preto para o Distrito Federal e noroeste Mineiro.
ABSTRACT: During the winter seasons of 1997 and 1998, experiments were conducted under irrigation in the experimental area of Embrapa Cerrados Research Center at Planaltina, Federal District and in the experimental area of the Piratininga Region Agricultural Cooperative (Coopertinga), Northwest of Minas Gerais State. The objective was to identify cultivars t
Planaltina. Publicado em: 2011
-
2. Embrapa 22: cultivar de trigo irrigado para Minas Gerais, Goiás, Mato Grosso, Bahia e Distrito Federal.
ABSTRACT: In a joint research program the Cerrados Agricultural Research Center, Planaltina, DF; the Wheat National Research Center, Passo Fundo, RS; the State of Minas Gerais Agricultural Research Corporation, Uberaba, MG; the State of Goiás Agricultural Research, Goiânia, GO, and the Agricultural Cooperative for Development of the High Paranaíba River R
Planaltina. Publicado em: 2011
-
3. Cooperação em sagüis comuns callithrix jacchus: condições e restrições
The cooperative behavior is no longer a dilemma for the theory of evolution, since there are models that explain the evolution of this behavior by means of natural selection at the individual level. However, there have been few studies on the proximal factors that interfere with cooperative behavior. In the study of the influence of cognition on cooperation,
Publicado em: 2010
-
4. Propostas para a gestão da qualidade e da segurança do alimento da unidade processadora de carne de Jacaré da COOCRIJAPAN
The raising of alligator in captivity began in Brazil as an option to protect the species and the land properties against invasions of alligator hunters. This activity was legalized by the decree 126/1990 of Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis (IBAMA). Increasingly, actions which are linked to the breeding of this animal
Publicado em: 2010
-
5. 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
-
6. Biologia e sucesso reprodutivo de mimus saturninus (aves: mimidae) no cerrado
The Chalk-browed Mockingbird, Mimus saturninus (Mimidae) is a very common bird in cerrados, grasslands, and pasturelands with scattered trees or shrubs, also occurring in urban environments. Here I studied aspects of its breeding biology and success in a natural cerrado. Data was collected at Estação Ecológica de Águas Emendadas (ESECAE) from 2003 to 200
Publicado em: 2009
-
7. Isolamento e caracterização de locos de microssatélite para Neothraupis fasciata, (Emberizidae, Passeriformes, Aves),
Microsatellite molecular markers are small repeated sequences in tanden compound of 1 to 6 nucleotides. Widely used as genetic markers, the microsatellites have a particular attribute that is the high rates of mutation. These molecular markers or are widely used in conservation genetics, population genetics, forensic research, diagnosis of diseases, ecologic
Publicado em: 2009
-
8. Biologia reprodutiva e comportamento cooperativo em ninhos de Cyspsnagra Hirundinacea
White-rumped Tanager (Cypsnagra hirundinacea) is a cooperative breeding species, which helpers are offspring of earlier breeding seasons. This species occurs in open areas of the Cerrado (Neotropical savanna). The first chapter of this dissertation presents a description of several aspects of C. hirundinacea reproductive biology, including reproductive perio
Publicado em: 2008
-
9. Aspectos do cuidado cooperativo em dois grupos de Callithrix jacchus selvagens
The Callitrichidae family presents cooperative breeding, where breeders and non breeders take care of the offspring. The aspects of care analyzed in this study were infant carrying, supervision, proximity and food transfer. Three sets of infants from two wild groups of Callithrix jacchus were studied in the environments of Caatinga (Assu group) and Atlantic
Publicado em: 2007
-
10. Dispersal costs set the scene for helping in an atypical avian cooperative breeder.
The ecological constraints hypothesis is suggested to explain the evolution of cooperative breeding in birds. This hypothesis predicts that the scene for cooperative breeding is set when ecological factors constrain offspring from dispersal. This prediction was tested in the atypical cooperative breeding system of the long-tailed tit, Aegithalos caudatus, by
-
11. Experimental evidence for kin-biased helping in a cooperatively breeding vertebrate.
The widespread belief that kin selection is necessary for the evolution of cooperative breeding in vertebrates has recently been questioned. These doubts have primarily arisen because of the paucity of unequivocal evidence for kin preferences in cooperative behaviour. Using the cooperative breeding system of long-tailed tits (Aegithalos caudatus) in which ki
-
12. The evolution of cooperative breeding in birds: kinship, dispersal and life history
The evolution of cooperation among animals has posed a major problem for evolutionary biologists, and despite decades of research into avian cooperative breeding systems, many questions about the evolution of their societies remain unresolved. A review of the kin structure of avian societies shows that a large majority live in kin-based groups. This is consi
The Royal Society.