102,367 research outputs found
Levantamento aéreo como ferramenta para conservação da biodiversidade no Pantanal.
No full textFormato eletrônico
Aquecimento global, tamanduás e arborização urbana.
No full textFormato eletrônico. Disponível em: Rios vivos, Maracaju news, Infobibos, Agora MS, Campo Grande News, Terra Brasilis, Cassilândia News, Correio do Estado
Are there electoral cycles of emigration? An empirical investigation based on European data
No full textEconomic literature suggests that economic factors and the availability of amenities act as determinants of migration choices together with socio-demographic factors. Migration has also been found to be the consequence of political instability. This article argues that specific political events, i.e., democratic elections, may be linked to migration flows. By using European data over the 1999-2012 time period, our system GMM estimations reveal that there is an emigration political cycle across European democracies and across the young democracies of Central and Eastern European countries. We observe that regular elections tend to diminish emigration ratios, whereas endogenous elections have the opposite effect. These results suggest special challenges for governments and oppositions, which are also discussed
A importância da fauna silvestre como recurso cênico para o setor turístico.
No full textFolder Formato eletrônico
Influence of Toyocerin (Bacillus cereus var. toyoi) on the breeding performances of primiparous rabbit does
No full text[EN] This study was carried out to evaluate the effects of Bacillus cereus var. toyoi (Toyocerin¿ 109) on
performance of rabbit does during two reproductive cycles. A total of 102 does were assigned to three
treatments: T0 (basal diet), T200 (basal diet + 0.2 g Toyocerin¿/kg feed) and T1000 (basal diet + 1 g Toyocerin¿/
kg feed). The experimental diets contained a coccidiostat and were given ad libitum. No antibiotics were
administered with the feed or water along the trial. Artificial insemination (AI) of does was performed 11 days
(d) after kindling and kits were weaned at 35 d of age. Does, kits and feed were weighted at the beginning, AI,
kindling, 18 d after kindling and weaning. Toyocerin¿ increased feed intake of lactating does, mainly between
18 d after kindling and weaning (P<0.05). When T200 was compared with T0 treatment, feed intake increased
76 g/d in the first cycle and 34 g/d in the second one. These increases allowed higher kit growth from 18th day
to weaning and live weight at weaning (P<0.05). The weight of T200 kits was 43 g (4.9%) and 54 g (5.6%)
higher than those of T0 kits in the first and second cycles, respectively. In the second cycle, Toyocerin¿
reduced kit mortality during the first 18 days of life from 18.5% with T0 to 11.1% with T200 and 9.9% with
T1000 (P<0.05). Feed efficiency was not affected by treatments. No effects of Toyocerin level were observed
on any recorded traits. The results of this experiment suggest that Toyocerin¿ can have a positive effect on
productivity of rabbit does kept under an intensive system.The authors thanks to António Silva and Clara Silva for technical assistants. This work was supported by a Project signed by Rubinum.Pinheiro, V.; Mourao, J.; Jimenez, G. (2007). Influence of Toyocerin (Bacillus cereus var. toyoi) on the breeding performances of primiparous rabbit does. World Rabbit Science. 15(4). https://doi.org/10.4995/wrs.2007.59015
Stable solutions of equations with a quadratic gradient term
No full textWe consider positive solutions to a non-variational family of equations of the form−∆u − b(x)|∇u| 2 = λg(u) in Ω,where λ ≥ 0, b(x) is a given function, g is an increasing nonlinearity with g(0) > 0 and Ω ∈ R n isa bounded smooth domain. We introduce the definition of stability for nonvariational problemsand establish existence and regularity results for stable solutions. These results generalize theclasical results obtained when b(x) = b is a constant function making the problem variationalafter a suitable transformation.Fil: Afonso Mourao Terra, Joana Isabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Investigaciones Matemáticas "Luis A. Santalo". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Investigaciones Matemáticas "Luis A. Santalo"; Argentin
Como o jacaré-do-pantanal, Caiman yacare, resiste a períodos secos na região central do Pantanal.
No full textEsta publicação mostra os extremos da capacidade de sobrevivência do jacaré-do-pantanal, frente a ameaça da escassez hídrica na região pantaneira. Desde 1986, os autores desta ublicação estudam a espécie que na época enfrentava sérios problemas de conservação, devido a caça clandestina que durou até 1990. Mas esse período foi de grande oferta de ambientes aquáticos, com grandes enchentes, mantendo a resiliência da população frente a essa ameaça. De lá para cá, a seca tem se intensificado na Planície Pantaneira causando redução dos ambientes aquáticos e levando muitos jacarés a morte, apesar do seu comportamento adaptativo para sobreviver ao estresse hídrico. A publicação é um sinal de alerta, frente as imagens dos jacarés lutando pela vida, nos conduzindo a uma reflexão sobre o nosso papel para buscar soluções para minimizar os impactos das mudanças climáticas e promover o desenvolvimento sustentável no Pantanal
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