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Registros recuperados: 3
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Hemiodus langeanii (Characiformes: Hemiodontidae), a new species from rio Amana, rio Maués-Açú drainage, Amazon basin, Brazil Neotropical Ichthyology
Beltrão,Hélio; Zuanon,Jansen.
Hemiodus langeanii, new species, is described based on 20 specimens collected in the rio Amana, a tributary of rio Maués-Açú, rio Amazonas drainage, Brazil. The new taxon can be distinguished from its congeners by its high body (27.1-35.3%, average 32.3% SL vs. 18.8-28.5% in remaining species). The new species also exhibits a large lateral dark spot that is equal to, or greater than, the eye diameter (vs. smaller in remaining species except for H. microlepis). The lack of conspicuous lateral stripe or transverse bands and the low lateral line scales count (68-74) distinguish H. langeanii from some similar species in the genus (scale counts: 94-123 in H. argenteus, 124-148 in H. microlepis, 86-99 in H. orthonops and 77-92 in H . parnaguae). Finally, the new...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Actinopterygii; Anthropogenic disturbance; Goldmining; Hemiodus unimaculatus; Ostariophysi.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200004
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North American Dipteran Pollinators: Assessing Their Value and Conservation Status Ecology and Society
Kearns, Carol Ann; University of Colorado at Boulder; kearnsca@rtt.colorado.edu.
Recent attention to pollinator declines has focused largely on bees and vertebrates. However, few pollination systems are obligate, and pollinators that complement the role of bees may respond differently to environmental disturbance. The conservation status of North American fly pollinators remains undocumented. In this paper, methods for monitoring shifts in dipteran pollinator abundance are discussed. The need for further basic research into pollination by flies is addressed, and the significance of dipteran conservation is considered.
Tipo: Peer-Reviewed Reports Palavras-chave: Anthophilous flies; Anthropogenic disturbance; Conservation; Diptera; Dipteran conservation; Generalist pollinators; North America; Pollination; Pollinator declines; Population fluctuation; Redundant pollination systems.
Ano: 2001
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Toward a Panther-centered View of the Forests of South Florida Ecology and Society
Kerkhoff, Andrew J; University of New Mexico; kerkhoff@unm.edu; Milne, Bruce T; University of New Mexico; bmilne@sevilleta.unm.edu; Maehr, David S; University of Kentucky; dmaehr@pop.uky.edu.
Anthropogenic habitat degradation and loss is the single largest threat to the endangered Florida panther, Puma concolor coryi. Conservation of the subspecies must be undertaken on the scale of the entire landscape. Thus, a view of the forested landscape of South Florida must be developed that is meaningful with reference to the panther. We approach this problem by analyzing the spatial interactions of panthers and forests at multiple scales. We apply tools derived from fractal geometry to the analysis of 12 years of telemetry observations of panthers and remotely sensed forest cover imagery. A fractal characterization extends conventional scale-dependent measures of forest density and relates intuitively to panther ecology. To move toward a...
Tipo: Peer-Reviewed Reports Palavras-chave: Puma concolor coryi; Florida panther; Anthropogenic disturbance; Conditional mapping; Controls on distribution; Fractal analysis; Habitat selection; Landscape conservation; Organism-centered landscapes; Scale dependence; Telemetry.
Ano: 2000
Registros recuperados: 3
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