Real fábrica de vidros de Coina – Chemical analysis of archaeological glass fragments

Actas do 17º Congresso da Associação Internacional para a História do Vidro

Os fait divers e o jornalismo televisivo: O caso dos telejornais de fim de semana da SIC

Relatório de Estágio apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Jornalismo

Os faits divers no jornalismo económico: do bom senso à realidade das notícias

Relatório de Estágio apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Jornalismo

Primate populations in continuous forest and forest fragments in Central Amazonia

Population densities of six primate species (Saguinus midas, Pithecia pithecia, Cebus apella, Chiropotes satanas, Alouatta seniculus and Ateles paniscus) were estimated in continuous forest and in isolated reserves (one of 100 ha and four of 10 ha). Saguinusdensities in the continuous forest were found to be low, probably due to the lack of edge habitat and second growth favoured by them; Pithecia, Cebus and Ateles populations are also low, possibly because of more widely distributed and/or less abundant food sources than is true for other Amazonian regions, although hunting in the past, particularly of Ateles may also be a contributing factor; and Chiropotes and Alouatta densities were found to be similar to those observed in other areas of Amazonas forests. Ateles and Chiropotes, which occupy ranges on the order of three km2 were excluded from the 100-ka reserve at the time of its isolation. Unfortunately populations were not known prior to isolation of this reserve but during isolation there remained four groups of Saguinus, two Pitheciagroups, one Cebus groups and five Alouatta groups. One Saguinus group disappeared two months later, and one year post-isolation the Cebus group also left the reserve. Single Alouatta groups survive in the isolated 10-ha reserves. Saguinus, present in the four 10-ha reserves following isolation, have disappeared from two of them. One 10-ha reserve retains a group of Pithecia.

The persistence of ant-following birds in small amazonian forest fragments

SUMMARYMist-net captures of army ant-following bird were monitored during the isolation of central Amazonian forest fragments of 1 ha (n = 5), 10 ha (n = 4) and 100 ha (n = 1). Post-isolation captures of the three obligate ant-following birds Dendrocinela merula, Pithys albifrons, and Gymnopithys rufigula decreased significantly in all fragments. post-isolation captures of four facultative ant-following species were not significantly different in forest fragments of 1 ha and 10 ha, although two species decreased significantly in the 100 ha fragment. Experimental introductions of obligate species into small forest fragments in the absence and presence of introduced Eciton burchelli army ant colonies resulted in significantly greater recaptures of introduced birds when active army ant colonies were present. Of the 105 birds introduced, 58 ' 55%) crossed 100-320 m od dedorested area an were recaptured in continuous forest.

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.50 (1860)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.48 (1859)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.46 (1858)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.45 (1857)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.43 (1856)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.42 (1856)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.41 (1855)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.38 (1854)

Comptes rendus hebdomadaires des séances de l'Académie des sciences.

t.37 (1853)