The use of collars, pedometers or activity tags is expensive to record cattle's behavior in short periods (e.g. 24h). Under this particular situation, the development low-cost and easy-to-use technologies relevant. Similar smartphone apps for human recognition, which analyzes data from embedded triaxial accelerometer sensors, we develop an Android app cattle. Four main steps were followed: a) a...

The olive snail (Neritina reclivata) is ubiquitous in tropical and sub-tropical systems of the Gulf of Mexico, however its impacts on sediment microalgae have been little studied. Many coastal systems around the world are being eutrophied due to human activities, and seemingly they will continue to be eutrophied to a further extent in the future. Exploring the single and combined impacts of fur...

This paper proposes a strategy for the classification of codimension-two grazing bifurcations of limit cycles in piecewise smooth systems of ordinary differential equations. Such nonsmooth transitions (C-bifurcations) occur when the cycle interacts with a discontinuity boundary of phase space in a non-generic way. Several such codimension-one events have recently been identified, causing for ex...

Approximately 80% of agricultural CH4 comes from livestock systems, with 90% that derived enteric production by ruminants. Grazing systems are used worldwide to feed dairy cattle. Although quantifying emissions in grazing has unique challenges, emerging technologies have made gaseous data collection more feasible and less laborious. Nevertheless, robust sets on under various conditions, as well...

Objectives in tropical livestock enterprises are more varied than in most temperate situations. Only in enclosed or fixed area management systems are they generally similar. With communal grazing or nomadic systems, objectives are usually not to maximise profits from sales. Grazing management, other than through the control of stock numbers and animal species combination, is difficult to implem...

A 6-year study was conducted in tallgrass prairie to assess the effects of grazing management (cattle stocking densities and grazing systems) on plant community composition and diversity. Treatments included sites grazed season-long (May to October) at 3 stocking densities (3.8, 2.8, and 1.8 hectares per animal unit), ungrazed control sites, and sites under a late-season rest rotation grazing s...