منابع مشابه
Mountain surprise for threatened snails
endeavours, but should not be confused as crucial to our life on this planet. My colleagues and friends quickly point out that I am teaching people important things about the knowledge we have acquired through careful scientific exploration. Yeah, yeah. But the students I teach are already very well educated, and I often feel like the post-dinner entertainment, perhaps marginally better than MT...
متن کاملEcological opportunity in adaptive radiation of Galápagos endemic land snails.
The classic evolutionary hypothesis of ecological opportunity proposes that both heterogeneity of resources and freedom from enemies promote phenotypic divergence as a response to increased niche availability. Although phenotypic divergence and speciation have often been inferred to be the primary consequences of the release from competition or predation that accompanies a shift to a new adapti...
متن کاملFears over new Galápagos status
'horizon scanning' for biotechnology advances and provides information, " wrote Zoe Williams in The Guardian. Donna Dickenson, emeritus professor of medical ethics at the University of London, said that a fundamental part of the HFEA's work is consultative, taking the cultural temperature on issues like animal–human hybrid embryos. " We don't have a statutory national ethic commission. Almost e...
متن کاملHarorepupu aotearoa (Onygenales) gen. sp. nov.; a threatened fungus from shells of Powelliphanta and Paryphanta snails (Rhytididae)
A cleistothecial fungus, known only from the shells of giant land snails of the family Rhytidae, is described as a new genus and species within Onygenales, Harorepupu aotearoa gen. sp. nov. Known only from the sexual morph, this fungus is characterized morphologically by a membranous ascoma with no appendages and ascospores with a sparse network of ridges. Ribosomal DNA sequences place the new ...
متن کاملPhylogeography of the Galápagos hawk (Buteo galapagoensis): a recent arrival to the Galápagos Islands.
Galápagos hawks (Buteo galapagoensis) are one of the most inbred bird species in the world, living in small, isolated island populations. We used mitochondrial sequence and nuclear minisatellite data to describe relationships among Galápagos hawk populations and their colonization history. We sampled 10 populations (encompassing the entire current species range of nine islands and one extirpate...
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ژورنال
عنوان ژورنال: Oryx
سال: 1987
ISSN: 0030-6053,1365-3008
DOI: 10.1017/s0030605300027186