Relação peso-comprimento e fator de condição relativo (Kn) do pirarucu Arapaima gigas Schinz, 1822 (Arapaimidae) em cultivo semi-intensivo no estado do Amazonas, Brasil.

O pirarucu Arapaima gigas (Osteoglossiformes, Arapaimidae), peixe da bacia amazônica, apresenta alta taxa de crescimento e tolerância a alta densidade de estocagem, tem rusticidade ao manuseio e aceita alimentação artificial quando treinado no início da vida, características relevantes para o cultivo de peixe. Neste estudo, a relação peso-comprimento (W=a·Lb) e o fator de condição relativo (Kn) foram estimados para alevinos, juvenis e jovens de pirarucus cultivados em piscicultura semi-intensiva no município de Manacapuru, estado do Amazonas, na Amazônia central, Brasil. Alevinos foram previamente treinados para aceitar ração comercial durante no início da vida e depois foram alimentados com ração para peixes contendo 45% de proteína bruta. A equação relação peso-comprimento mostrou crescimento do tipo isométrico, com valor da constante de regressão (b) igual 3,068. O Kn variou de 0.811 a 1.170 (média de 1.007 ± 0.059) e esses valores elevados indicaram boas condições corporais dos peixes nas condições cultivadas

Cenários territoriais para 15 produtos agroenergéticos.

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Records of new localities and hosts for crustacean parasites in fish from the eastern Amazon in northern Brazil.

The aim of this study was to investigate parasites crustacean fauna in Arapaima gigas, Cichla monoculus, Cichla ocellaris, Cichla jariina, Satanoperca jurupari, Leporinus friderici, Leporinus fasciatus, Hoplias malabaricus, Phractocephalus hemioliopterus, Serrasalmus altispinis, Pseudoplatystoma tigrinum and Potamotrygon motoro of the State Amapa´ and Para´, in northern Brazil. A total of 242 parasites, including Argulus elongatus, Argulus multicolor, Argulus juparanaensis, Argulus nattereri, Dolops discoidalis, Dolops longicauda, Braga patagonica, Braga fluviatilis, Livoneca guianensis and undetermined Lernaeidae, were collected from these hosts. The Argulus species had the greatest richness among the community of parasitic crustaceans. There was a low abundance of parasites among the hosts, other than D. discoidalis, was most abundant in the integument of A. gigas and P. tigrinum. Finally, the present study reported nine new hosts for the crustacean parasite species and expanded knowledge of the occurrence of some parasite species in the Jari River basin, in eastern Amazon

Embryo production using epididymal sperm submitted to different selection methods and their influence on the embryo sex.

Proceedings of the 31st Annual Meeting of the Brazilian Embryo Technology Society (SBTE); Cabo de Santo Agostinho, PE, Brazil, August 17th to 19th, 2017. Abstract

CVD of CrO2: towards a lower temperature deposition process

We report on the synthesis of highly oriented a-axis CrO2 films onto (0001) sapphire by atmospheric pressure CVD from CrO3 precursor, at growth temperatures down to 330 degree Celsius, i.e. close to 70 degrees lower than in published data for the same chemical system. The films keep the high quality magnetic behaviour as those deposited at higher temperature, which can be looked as a promising result in view of their use with thermally sensitive materials, e.g. narrow band gap semiconductors.Comment: 13 pages, 4 figure

On the Nonlinear Stability of Asymptotically Anti-de Sitter Solutions

Despite the recent evidence that anti-de Sitter spacetime is nonlinearly unstable, we argue that many asymptotically anti-de Sitter solutions are nonlinearly stable. This includes geons, boson stars, and black holes. As part of our argument, we calculate the frequencies of long-lived gravitational quasinormal modes of AdS black holes in various dimensions. We also discuss a new class of asymptotically anti-de Sitter solutions describing noncoalescing black hole binaries.Comment: 26 pages. 5 figure

Sítio da Rede Regional de Agroecologia Mantiqueira-Mogiana: versão 1.0: manual do usuário.

Requisitos de hardware e software para acesso ao Sítio da Rede. Estrutura do Sistema. Composição do Sítio da Rede Regional de Agroecologia Mantiqueira-Mogiana. Página inicial. Agenda. Notícias. Fórum. Parceiros. Artigos. Álbum de fotos. Links interessados. Perguntas e respostas.bitstream/CNPTIA/11315/1/doc64.pdfacesso em: 28 maio 2008

Rotating Dilaton Solutions in 2+1 Dimensions

We report a three parameter family of solutions for dilaton gravity in 2+1 dimensions with finite mass and finite angular momentum. These solutions are obtained by a compactification of vacuum solutions in 3+1 dimensions with cylindrical symmetry. One class of solutions corresponds to conical singularities and the other leads to curvature singularities.Comment: Accepted to be published in Gen. Rel. Grav., added reference