We investigated the effects of overgrazing on the foraging behavior of livestock on a Mongolian steppe, by quantifying some behaviors of cattle, sheep and goats foraging in a lightly and a heavily grazed area in summer and winter. All animal species showed higher walking velocity and tended to show higher step/bite ratio when they foraged in the heavily grazed area than in the lightly grazed ar...

The effect of introduced large herbivores on the abundance of Ixodes ricinus ticks and their Borrelia infections was studied in a natural woodland in The Netherlands. Oak and pine plots, either ungrazed or grazed by cattle, were selected. Ticks were collected weekly by blanket dragging. Borrelia infections were determined by PCR and restriction fragment length polymorphism. Rodent densities wer...

Dena Biosphere Reserve located in Iran and is a 550 Biosphere Reserve in the worlds. This research was investigated in the two protected and non-protected areas, in a Dena Biosphere Reserve, Kohkeloye va Boyrahmad province, and central zagros forest, southwest of Iran. Inventory methods designed by systemetic-randomaiz method by use the rectangular plots that were 15×30 meters in the 100×100 m ...

The objective of the present experiment was to describe the sward canopy structures of 3 different wheat (Triticum aestivum L.) pastures and relate them to short-term herbage intake rate and foraging dynamics by steers. Pastures were sampled for leaf and stem fractions at the bottom, middle, and top canopy strata. Sward surface heights and tiller and bulk densities were measured. Herbage was se...

sTUDIES of the liveweight gains of beef cattle have been undertaken at several places in North Queensland. These have included “Wairuna”, 50 miles W. of Cardwell, in a 28-inch rainfall area fairly typical of a large area of cattle country in North Queensland; the Bureau of Tropical Agriculture, South Johnstone, where cattle are grazed on tropical grasses and legumes grown under the high rainfal...

Dena Biosphere Reserve located in Iran and is a 550 Biosphere Reserve in the worlds. This research was investigated in the two protected and non-protected areas, in a Dena Biosphere Reserve, Kohkeloye va Boyrahmad province, and central zagros forest, southwest of Iran. Inventory methods designed by systemetic-randomaiz method by use the rectangular plots that were 15×30 meters in the 100×100 m ...

Populations of Grasshopper Sparrows (Ammodramus savannarum) have been declining, and agricultural practices, such as grazing by domestic cattle (Bos taurus), are likely contributing factors. Grazing can alter the composition and structure of vegetation and influence prey availability, and such changes can impact the nesting success of grassland birds. Our objective was to examine the nesting su...

dena biosphere reserve located in iran and is a 550 biosphere reserve in the worlds. this research was investigated in the two protected and non-protected areas, in a dena biosphere reserve, kohkeloye va boyrahmad province, and central zagros forest, southwest of iran. inventory methods designed by systemetic-randomaiz method by use the rectangular plots that were 15×30 meters in the 100×100 m ...

Desertification is often characterized by the replacement of mesophytic grasses with xerophytic shrubs. Livestock grazing is considered a key driver of shrub encroachment, although most evidence is anecdotal or confounded by other factors. Mapping of velvet mesquite (Prosopis velutina) shrubs in and out of exclosures in 1932, 1948, and 2006 in semiarid grasslands of southeastern Arizona, USA, a...