Molt Cycle Of The Gray-breasted Martin (hirundinidae: Progne Chalybea) In A Wintering Area In Maranhão, Brazil

[No abstract available]153436438Alerstam, T., Hedenström, A., Äkesson, S., Long-distance migration: Evolution and determinats (2003) Oikos, 103, pp. 247-260Azevedo Júnior, S.M., Dias Filho, M.M., Larrazabal, M.E., Plumagens e mudas de Charadriiformes (Aves) no litoral de Pernambuco, Brasil (2001) Revista Brasileira de Zoologia, 18, pp. 657-672Bull, J., Farrand, J., (1977) The Audubon Society Field Guide to North American Birds - Eastern Region, , New York: Alfred A. knopfEisenmann, E., South American migrant swallows of the genus Progne in Panama and northern South Americawith comments on their identification and molt (1959) Auk, 76, pp. 528-532Eisenmann, E., Haverschmidt, F., Northward migration to Surinam of South American Martins (Progne) (1970) Condor, 72, pp. 368-369Fredrizzi, C.E., Azevedo Júnior, S.M., Larrazábal, M.E.L., Body mass and acquisition of breeding plumage of wintering (Calidris pusilla) (Linnaeus) (Aves, Scolopacidae) in the coast of Pernambuco, north-eastern Brazil (2004) Rev. Bras. Zool, 21, pp. 249-252Holmgren, N., Hedenström, A., The scheduling of molt in migratory birds (1995) Evol. Ecol, 9, pp. 354-368Igl, L.D., Johnson, D.H., Changes in breeding bird populations in North Dakota: 1967 to 1992-93 (1997) Auk, 114, pp. 74-92Marks, J.S., Moult of Bristle-Thighed Curlews in the Northwestern Hawaiian Island (1993) Auk, 110, pp. 573-587Naka, L.N., Rodrigues, M., Roos, A.L., Azevedo, M.A.G., Bird conservation on Santa Catarina Island, Southern Brazil (2002) Bird Conservation Internacional, 12, pp. 123-150Niles, D.M., Molt cycles of Purple Martins (Progne subis) (1972) Condor, 74, pp. 61-71Souza, D.G.S., (2002) All the birds of Brazil: An identification guide, , Salvador: Editora DallSvensson, E., Merilä, J., Molt and migratory condition in Blue Tits: A serological study (1996) Condor, 98, pp. 825-83

Diet Of The Gray-breasted Martin (hirundinidae: Progne Chalybea) In A Wintering Area In Maranhão, Brazil

[No abstract available]153445447Alerstam, T., Hedenström, A., Äkesson, S., Long-distance migration: Evolution and determinats (2003) Oikos, 103, pp. 247-260Butler, C.J., The disproportionate effect of global warming on the arrival dates of short-distance migratory birds in North America (2003) Ibis, 145, pp. 484-495Borror, D.J., DeLong, D.M., (1988) Introdução ao Estudo dos Insetos, , São Paulo: Editora Edgard Blucher LtdaBugoni, L., Vooren, C.M., Feeding ecology of the Common Tern Sterna hirundo in a wintering area in southern Brazil (2004) Ibis, 146, pp. 438-453Bull, J., Farrand, J., (1977) The Audubon Society Field Guide to North American Birds - Eastern Region, , New York: Alfred A. KnopfDyrcz, A., Breeding biology of the Mangrove Swallow (Tachycineta albilinea) and the Grey-breasted Martin (Progne chalybea) at Barro Colorado Island, Panama (1984) Ibis, 126, pp. 59-66Eisenmann, E., South American migrant swallows of the genus Progne in Panama and northern South Americawith comments on their identification and molt (1959) Auk, 76, pp. 528-532Eisenmann, E., Haverschmidt, F., Northward migration to Surinam of South American Martins (Progne) (1970) Condor, 72, pp. 368-369Fredrizzi, C.E., Azevedo Júnior, S.M., Larrazábal, M.E.L., Body mass and acquisition of breeding plumage of wintering (Calidris pusilla) (Linnaeus) (Aves, Scolopacidae) in the coast of Pernambuco, north-eastern Brazil (2004) Revista Brasileira de Zoologia, 21, pp. 249-252Hedd, A., Gales, R., The diet of shy albatrosses (Thalassarche cauta) at Albatross Island, Tasmania (2001) Journal of Zoology, 253, pp. 69-90Jetz, W., Steffen, J., Linsenmair, K.E., Effects of light and prey availability on nocturnal. lunar and seasonal activity of tropical nightjars (2003) Oikos, 103, pp. 627-639Johnston, R.F., Seasonal variation in the food of the Purple Martin, Progne subis, in Kansas (1967) Ibis, 109, pp. 8-13Kwok, H.K., Corlett, R.T., Seasonality of forest invertebrates in Hong Kong, South China (2002) Journal of tropical Ecology, 18, pp. 637-644Lorentsen, S.H., Klages, N., Rov, N., Diet and prey consumption of Antarctic petrels (Thalassoica antarctica) at Svarthamaren, Dronning Maud Land, and at sea outside the colony (1998) Polar Biology, 19, pp. 414-420McCarty, J.P., Winkler, D.W., Foraging ecology and diet selectivity of Tree Swallows feeding nestlings (1999) Condor, 101, pp. 246-254Naka, L.N., Rodrigues, M., Roos, A.L., Azevedo, M.A.G., Bird conservation on Santa Catarina Island, Southern Brazil (2002) Bird Cons. Int, 12, pp. 123-150Ramstack, J.M., Murphy, M.T., Palmer, M.R., Comparative reproductive biology of three species of swallows on a common environment (1998) Wilson Bulletin, 110, pp. 233-243Turner, A.K., Nesting and feeding habits of Brown-chested Martins in relation to weather conditions (1984) Condor, 86, pp. 30-35Walsh, H., Food of nestling purple martins (1978) Wilson Bulletin, 90, pp. 248-260Wolda, H., Seasonal fluctuation in rainfall, food and abundance of tropical insects (1978) Journal of Animal Ecology, 47, pp. 369-38

QCD-scale modified-gravity universe

A possible gluon-condensate-induced modified-gravity model with f(R) \propto |R|^{1/2} has been suggested previously. Here, a simplified version is presented using the constant flat-spacetime equilibrium value of the QCD gluon condensate and a single pressureless matter component (cold dark matter, CDM). The resulting dynamical equations of a spatially-flat and homogeneous Robertson-Walker universe are solved numerically. This simple empirical model allows, in fact, for a careful treatment of the boundary conditions and does not require a further scaling analysis as the original model did. Reliable predictions are obtained for several observable quantities of the homogeneous model universe. In addition, the estimator E_{G}, proposed by Zhang et al. to search for deviations from standard Einstein gravity, is calculated for linear sub-horizon matter-density perturbations. The QCD-scale modified-gravity prediction for E_{G}(z) differs from that of the LambdaCDM model by about \pm 10 % depending on the redshift z.Comment: 24 pages; v7: published versio

Search for a W' boson decaying to a bottom quark and a top quark in pp collisions at sqrt(s) = 7 TeV

Results are presented from a search for a W' boson using a dataset corresponding to 5.0 inverse femtobarns of integrated luminosity collected during 2011 by the CMS experiment at the LHC in pp collisions at sqrt(s)=7 TeV. The W' boson is modeled as a heavy W boson, but different scenarios for the couplings to fermions are considered, involving both left-handed and right-handed chiral projections of the fermions, as well as an arbitrary mixture of the two. The search is performed in the decay channel W' to t b, leading to a final state signature with a single lepton (e, mu), missing transverse energy, and jets, at least one of which is tagged as a b-jet. A W' boson that couples to fermions with the same coupling constant as the W, but to the right-handed rather than left-handed chiral projections, is excluded for masses below 1.85 TeV at the 95% confidence level. For the first time using LHC data, constraints on the W' gauge coupling for a set of left- and right-handed coupling combinations have been placed. These results represent a significant improvement over previously published limits.Comment: Submitted to Physics Letters B. Replaced with version publishe