Waterfalls are specific hydrological and hydrobiological objects that often serve as the natural obstacles for spreading of aquatic animal species, resulting discontinuous range these species. rapids create special habitats riverine organisms cause microclimatic changes along coast. The areas largest waterfalls in Ethiopia, high-mountainous Jinbar Waterfall low-mountainous Blue Nile Falls (Tis ...

Landscape genetics holds promise for the forecasting of spatial patterns of genetic diversity based on key environmental features. Yet, the degree to which inferences based on single species can be extended to whole communities is not fully understood. We used a pristine and spatially structured community of three landlocked salmonids (Salvelinus fontinalis, Salmo salar, and Salvelinus alpinus)...

Two general processes may influence gene flow among populations. One involves divergent selection, wherein the maladaptation of immigrants and hybrids impedes gene flow between ecological environments (i.e. ecological speciation). The other involves geographic features that limit dispersal. We determined the relative influence of these two processes in natural populations of Trinidadian guppies...

In the past, sensors networks in cities have been limited to fixed sensors, embedded in particular locations, under centralised control. Today, new applications can leverage wireless devices and use them as sensors to develop aggregated information. In this paper, we show that the emerging patterns unveiled through the analysis of large sets of aggregated digital footprints can provide novel in...

Swordtails (Xiphophorus; Poeciliidae) have figured prominently in research on fish mating behaviours, sexual selection, and carcinogenesis, but their population structures and dispersal patterns have been relatively neglected. Using nine microsatellite loci, we estimated genetic differentiation in Xiphophorus helleri within and between adjacent streams in Belize. The genetic data were complemen...

Sustainable Marketing and Tourism have gained popularity in academia due to their benefits Society, Environment, the Economy. Although several studies explored international national attractions, there are only limited on a local level. This study aims assess capabilities of Mantayupan Waterfalls' Attraction Dickman's 1995 5As, Mix, Development. The utilized purposive sampling technique with 50...

Fernand MeyerCentre de Morphologie MathématiqueMines-ParisTech () Watersheds, waterfalls, on edge or node weighted graphs 2012 February 29 1 / 201 arXi Introduction The watershed transform is one of the major image segmentation tools [4], used in the community of mathematical morphology and beyond. If the watershed is a successful concept, there is another side of the coin: a number of definiti...

Abstract Relationships between body shape and escape performance are well established for many species. However, organisms can face multiple selection pressures that might impose competing demands. Many fishes use fast starts escaping predator attacks, whereas some species of gobiid have evolved the ability to climb waterfalls out predator-dense habitats. The ancestral ‘powerburst’ climbing mec...