Estimativas de parâmetros genético e fenotipicos dos pesos ao nascimento e a desmama e do ganho de peso pre-desmama em um rebanho Canchim.

O objetivo do presente estudo foi estimar as herdabilidades e as correlações genética, fenotipica e ambiental, dos pesos ao nascimento e a desmama e ganho de peso diário do nascimento a desmama de animais da raça Canchim, criados em regime de pasto na região Oeste do Estado de São Paulo.Resumo expandido

Estimativas de parâmetros genéticos e fenotípicos para características de crescimento até a desmama em bovinos da Raça Canchim.

Foi obtido as estimativas de herdabilidade e de correlações genéticas, fenotípicas e de ambiente, para os pesos ao nascimento e a desmama e ganho de peso diário do nascimento a desmama de animais da raça Canchim

Distribuição geográfica de Parkia pendula (Willd.) Benth. ex Walp. (Leguminosae-Mimosoideae) no estado do Pará-Brasil.

Dentro do gênero Parkia, encontra-se a espécie Parkia pendula (Willd.) Benth. Ex Walp.. Essa árvore possui valor comercial e ecológico; sua madeira é utilizada na carpintaria, marcenaria, caixotaria e construção civil (LORENZI, 2009). Diante da relevância desta espécie o objetivo deste trabalho foi realizar o estudo da distribuição de Parkia pendula (Willd.) Benth. ex Walp. no estado do Pará, utilizando dados de herbários. O trabalho foi realizado verificando o banco de dados do Herbário IAN- Embrapa Amazônia Oriental , por meio do sistema BRAHMS (Botanical Research and Herbarium Management System) e os dados da rede speciesLink.. De acordo com o levantamento encontrou-se registros de 223 amostras de Parkia pendula. Destas, 114 pertencem ao Herbário IAN, (85) estão presente no speciesLink e (24) no Museu Paraense Emílio Goeldi. Parkia pendula está presente em 25 municípios do Estado do Pará, sendo os que mais se destacam com amostras: Mojú com 58 exemplares, Santarém (21), Paragominas (16), Belém (14) e Belterra (9). Os coletores que mais contribuíram foram Ferreira, A.M. (18 amostras), Barbosa, M. (14) e Soller,J.G) (13). A espécie possui ampla distribuição no Estado do Pará, estando presente em mais de 29 municípios. Para as áreas em que não foi encontrado registro espera-se contribuir para o direcionamento de novas coletas botânicas

Environment of the submillimeter-bright massive starburst HFLS3 at z∼z\sim6.34

We describe the search for Lyman-break galaxies (LBGs) near the sub-millimeter bright starburst galaxy HFLS3 at $z$$=$6.34 and a study on the environment of this massive galaxy during the end of reionization.We performed two independent selections of LBGs on images obtained with the \textit{Gran Telescopio Canarias} (GTC) and the \textit{Hubble Space Telescope} (HST) by combining non-detections in bands blueward of the Lyman-break and color selection. A total of 10 objects fulfilling the LBG selection criteria at $z$$>$5.5 were selected over the 4.54 and 55.5 arcmin$^2$ covered by our HST and GTC images, respectively. The photometric redshift, UV luminosity, and the star-formation rate of these sources were estimated with models of their spectral energy distribution. These $z$$\sim$6 candidates have physical properties and number densities in agreement with previous results. The UV luminosity function at $z$$\sim$6 and a Voronoi tessellation analysis of this field shows no strong evidence for an overdensity of relatively bright objects (m$_{F105W}$$<$25.9) associated with \textit{HFLS3}. However, the over-density parameter deduced from this field and the surface density of objects can not excluded definitively the LBG over-density hypothesis. Moreover we identified three faint objects at less than three arcseconds from \textit{HFLS3} with color consistent with those expected for $z$$\sim$6 galaxies. Deeper data are needed to confirm their redshifts and to study their association with \textit{HFLS3} and the galaxy merger that may be responsible for the massive starburst.Comment: 14 pages, 12 figures, accepted for publication in Ap

HerMES: the rest-frame UV emission and a lensing model for the z= 6.34 luminous dusty starburst galaxy HFLS3

We discuss the rest-frame ultraviolet emission from the starbursting galaxy HFLS3 at a redshift of 6.34. The galaxy was discovered in Herschel/SPIRE data due to its red color in the submillimeter wavelengths from 250 to 500 μm. Keck/NIRC2 K s -band adaptive optics imaging data showed two potential near-IR counterparts near HFLS3. Previously, the northern galaxy was taken to be in the foreground at z = 2.1, while the southern galaxy was assumed to be HFLS3's near-IR counterpart. The recently acquired Hubble/WFC3 and Advanced Camera for Surveys (ACS) imaging data show conclusively that both optically bright galaxies are in the foreground at z < 6. A new lensing model based on the Hubble imaging data and the millimeter-wave continuum emission yields a magnification factor of 2.2 ± 0.3, with a 95% confidence upper limit on the magnification of 3.5. When corrected for lensing, the instantaneous star formation rate is 1320 M ☉ yr–1, with the 95% confidence lower limit around 830 M ☉ yr–1. The dust and stellar masses of HFLS3 from the same spectral energy distribution (SED) models are at the level of 3 × 108 M ☉ and ~5 × 1010 M ☉, respectively, with large systematic uncertainties on assumptions related to the SED model. With Hubble/WFC3 images, we also find diffuse near-IR emission about 0.5 arcsec (~3 kpc) to the southwest of HFLS3 that remains undetected in the ACS imaging data. The emission has a photometric redshift consistent with either z ~ 6 or a dusty galaxy template at z ~ 2

A quiescent galaxy at the position of the long GRB 050219A

Long-duration gamma-ray bursts (LGRBs) are produced by the collapse of very massive stars. Due to the short lifetime of their progenitors, LGRBs pinpoint star-forming galaxies. We present here a multi-band search for the host galaxy of the long dark GRB 050219A within the enhanced Swift/XRT error circle. We used spectroscopic observations acquired with VLT/X-shooter to determine the redshift and star-formation rate of the putative host galaxy. We compared the results with the optical/IR spectral energy distribution obtained with different facilities. Surprisingly, the host galaxy is a old and quiescent early-type galaxy at z = 0.211 characterised by an unprecedentedly low specific star-formation rate. It is the first LGRB host to be also an early-type post-starburst galaxy. This is further evidence that GRBs can explode in all kind of galaxies, with the only requirement being an episode of star-formation.Comment: 11 pages, 10 figures, 3 tables; accepted for publication in Astronomy & Astrophysic

Cluster analysis of breeding values for milk yield and lactation persistency in Guzerá cattle.

Abstract The aim of this study was to explore the pattern of genetic lactation curves of Guzerá cattle using cluster analysis. Test-day milk yields of 5,274 first-lactation Guzerá cows were recorded in a progeny test. A total of 34,193 monthly records were analyzed with a random regression animal model using Legendre polynomials to fit additive genetic and permanent environmental random effects and mean trends. Hierarchical and non-hierarchical cluster analyses were performed based on the EBVs for monthly test-day milk yield, peak yield, lactation persistency, and partial cumulative and 305-day yields. The heritability estimates for testday milk yields ranged from 0.24 to 0.52. Cluster analysis identified animals in the population that belong to different groups according to milk production level and lactation persistency

Efeito do intervalo de partos sobre a eficiência produtiva e econômica em rebanhos Gir Leiteiro.

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