Breeding Migration
Mostrando 1-12 de 30 artigos, teses e dissertações.
-
1. Malaria in gold-mining areas in Colombia
Gold-mining may play an important role in the maintenance of malaria worldwide. Gold-mining, mostly illegal, has significantly expanded in Colombia during the last decade in areas with limited health care and disease prevention. We report a descriptive study that was carried out to determine the malaria prevalence in gold-mining areas of Colombia, using data
Mem. Inst. Oswaldo Cruz. Publicado em: 2016-01
-
2. Determinantes da expansão da bovinocultura na Amazônia Legal Mato-Grossense / The determinants of cattle herd expansion in the brazilian legal Amazon (Mato Grosso state)
While the growing demand for food has become a challenge to the productive sectors, the equal distribution of this production is one of the main concerns of the contemporary society. Following this trend, agricultural production has thrived, supported by research and technology. On the other hand, meat production still has room for improvement through divers
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
3. Genetic variation in the Solanaceae fruit bearing species lulo and tree tomato revealed by Conserved Ortholog (COSII) markers
The Lulo or naranjilla (Solanum quitoense Lam.) and the tree tomato or tamarillo (Solanum betaceum Cav. Sendt.) are both Andean tropical fruit species with high nutritional value and the potential for becoming premium products in local and export markets. Herein, we present a report on the genetic characterization of 62 accessions of lulos (n = 32) and tree
Genetics and Molecular Biology. Publicado em: 12/03/2010
-
4. Temporal variations of body mass and plumage in Arenaria interpres (Aves: Scolopacidae) along the Brazilian coast
Every year, Brazil receives large flocks of nearly 40 migratory shorebirds species. The accumulation of body fat and nutrients during the summer is necessary for the long return flights of these birds and is fundamental for feather moulting and the change of their plumage. We present here an examination of the relationship between body mass and plumage chang
Zoologia (Curitiba). Publicado em: 2009-09
-
5. Monitoramento de Calidris pusilla (Linaeus, 1758) (Aves: Scolopacidae) na Salina Diamante Branco, Galinhos, RN
Calidris pusilla is a small neartic sandpiper with black beak and feathers, and it uses the Brazilian coast during its migration. The captures of C. pusilla were held in the Diamante Branco Saline, Galinhos, Brazil (05Â05â26ââS e 36Â16â31ââW), in April 2000, 2001 e 2003, period in which the species returns to the reproductive sites. In order to contr
Publicado em: 2009
-
6. Distribuição espacial e temporal de aves limícolas (Charadriiformes) na Ilha dos Caranguejos, Golfão Maranhense, Brasil / Spatial and temporal distribution of shorebirds (Charadriiformes) in Crab Island,Gulf of Maranhao, Brazil
We studied spatial and seasonal distribution of shorebirds (Charadriiformes) in Island of Caranguejos, Gulf of Maranhão. Censuses were conducted seasonally (considering arrival of migrants in South America, wintering, departure and breeding in North America) from September/2007 to July/2008, in two sectors of Island, North and South. We used the methods of
Publicado em: 2008
-
7. Variação sazonal e interespecífica na condição imunológica e corporal duas espécies de Elaenia (Passeriformes: Tyrannidae) no cerrado do Distrito Federal
The immune system plays a decisive role in defending an animal against attack by pathogens and parasites. Its activation and maintenance demand nutritional and energetic costs, and may result in a trade-off with other demanding activities during stressfull periods. To verify this, I compared both body and immunological conditions of Elaenia cristata during n
Publicado em: 2007
-
8. Habitat-split and the global decline of amphibians / Desconexão de habitats e o declinio global dos anfibios
O nicho dos anfíbios muda drasticamente ao longo da ontogenia, forçando larvas e pós-metamórficos a ocuparem dois hábitats distintos. Em áreas desmatadas, sítios reprodutivos aquáticos e fragmentos florestais podem ser muito desconectados, isolando o hábitat dos girinos do hábitat dos adultos, em um padrão de fragmentação que chamamos de descone
Publicado em: 2007
-
9. Behavior of humpback whales calves, Megaptera novaeangliae, around Abrolhos Archipelago, Bahia (Brazil) / Comportamento de filhotes de baleia jubarte, Megaptera novaeangliae, na região ao redor do Arquipélago dos Abrolhos, Bahia (Brasil)
To characterize the behavior of humpback whales calves, a study was conduct around Abrolhos Archipelago, an important nursing area for the species in Brazil. It was investigated aspects of the behavioral development of calves, behavioral differences between calves of different breeding seasons and also the effects of the presence of one escort in the behavio
Publicado em: 2006
-
10. Aspectos da biologia e da dinâmica populacional em cinco espécies de dendrobatídeos (Amphibia: Anura) na Amazônia Central
Although there exists much data about breeding behavior of dendrobatid species, there is a lack of information on other biological traits and aspects of population dynamics. Herein, I describe the variation in population structure and recapture rates of five simpatric species of dendrobatids, Colostethus caeruleodactylus, Colostethus nidicola, Colostethus sp
Publicado em: 2006
-
11. Symmetric pollen mitosis I and suppression of pollen mitosis II prevent pollen development in Brachiaria jubata (Gramineae)
Microsporogenesis and pollen development were analyzed in a tetraploid (2n = 4x = 36) accession of the forage grass Brachiaria jubata (BRA 007820) from the Embrapa Beef Cattle Brachiaria collection that showed partial male sterility. Microsporocytes and pollen grains were prepared by squashing and staining with 0.5% propionic carmine. The meiotic process was
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-11
-
12. Valongo, genetic studies on an isolated Afro-Brazilian community
A southern Brazilian isolated community of predominantly sub-Saharan African origin, with a total population of 74 individuals and high degree of inbreeding (F = 0.081) was studied. The small sizes of the breeding (35) and effective (21) populations, as well as the very small effective migration rate (4%), suggest a high probability for the occurrence of gen
Genetics and Molecular Biology. Publicado em: 2005-09