No abstract

No abstract

RESUMO Durante um período de, compreendendo três tipos principais de biomas: Cerrado, Caatinga e Mata Atlântica. Dentre estes, a Mata Atlântica foi, por fatores históricos, aquele que sofreu o mais intenso processo de devastação, estando atualmente reduzido a aproximadamente 5% de sua cobertura vegetal original (Fonseca, 1985a). Provavelmente menos de 1 % de sua extensão é representada por áreas não pertubadas (Mittermeier et alli, 1982).Embora altamente ameaçada, a mastofauna da Mata Atlântica é pouco

ABSTRACT

No abstract

The black-tailed marmoset (Cullithrix argentata melanura) occurs in centralwestern Brazil and adjacent parts of Bolivia, and is the only member of the genus (Callithrixi to occur naturally outside Brazil. Data presented in this paper extend the range of this marmoset at least 200 km to the southwest into yet another country, Paraguay.

A small-mammal hunting study was carried out in north-western Ecuador from October 1992 to October 1993, employing interview and trapping methods to document rodent and marsupial hunting by Chachi Indian and Afroecuadorian families. Based on 109 family interviews in 28 communities, it was determined that log-fall traps were used around family gardens and along forest trails. Afroecuadorian families used more than twice the number of traps than Chachis and trap lines of both ethnic groups were left open for approximately 6 days per trapping session. Chachi families left trap lines closed twice sas long as Afroecuadorian families. There were 857 individuals of seven rodent and four marsupial species trapped during the study, with Proechimys semispinosus representing more than 50 per cent of the small mammals trapped.

Abstract.We give sufficient conditions for all positive powers of an outer automorphism of a finitely generated free group to be irreducible, in the sense of Bestvina and Handel. We prove a conjecture of Stallings (1982), that a PV automorphism in rank > 3 has no nontrivial fixed points.