Abstract Weirs are hydraulic obstructions constructed across an open-channel flow causing a rise in water which is useful to convert the channels upstream as well using these structures measuring device. There different types, and sharp-crested weir one of them. Local scour downstream most critical problems affecting their safety stability. Many studies conducted prevent facilities from collaps...

This paper presents a method derived from Whitham’s variational formulation of the problem interfacial capillary–gravity short-crested waves. It is developed for resolution waves generated by obliquely reflecting vertical wall. In essence, not changed, but computations are performed and arranged to produce that has been applied number cases demonstrating effectiveness flexibility approach. The ...

Grieser Johns, A. D. and Grieser Johns, B.G. 1995. Tropical forest primates and logging: long–term coexistence? Oryx 29: 205–211. Henderson, C. L. 2002. Field Guide to the Wildlife of Costa Rica. University of Texas Press, Austin. Isbell, I. A. 1994. Predation on primates: ecological patterns and evolutionary consequences. Evol. Anthrop. 3(2): 61–71. Isbell, L. A. and Young, T. P. 1993. Human p...

Two new quill mite species (Cheyletoidea: Syringophilidae) are described from tyrannid birds (Passeriformes: Tyrannidae) in Peru: Picobia sayornis sp. nov. from the black phoebe Sayornis nigricans (Swainson) (first record of Picobia Haller species on tyrannid host) and Syringophilopsis szeffleri sp. nov. from the scale-crested pygmy-tyrant Lophotriccus pileatus (Tschudi). The Pacific elaenia My...

Benjamin Blonder*, Cyrille Violle and Brian J. Enquist Department of Ecology and Evolutionary Biology, University of Arizona, 1041 E Lowell St., Tucson, AZ 85721, USA; Rocky Mountain Biological Laboratory, PO Box 519, Crested Butte, CO 81224, USA; Center for Macroecology, Evolution, and Climate, University of Copenhagen, Universitetsparken 15, København Ø DK-2100, Denmark; Centre d’Ecologie Fon...

Department of Ecology and Evolutionary Biology, University of Arizona, 1041 E Lowell Street, Tucson, AZ 85721, USA, Rocky Mountain Biological Laboratory, PO Box 619, Crested Butte, CO 81224, USA, Center for Macroecology, Evolution, and Climate, University of Copenhagen, Universitetsparken 15, Copenhagen, DK-2100, Denmark, Sustainability Solutions Initiative, University of Maine, 5710 Norman Smi...

With the aim of identifying the species of nasal mites of Paroaria coronata (red-crested cardinal), the nasal cavity of 40 birds were examined. The nasal mites were identified as Ptilonyssus sairae de Castro and Sternostoma pirangae Pence, with 50% and 7.5% of prevalence, respectively. This is the first record of these mite species parasitizing P. coronata. This report also amplifies the area o...