Cattle and other livestock excrete endogenous steroid hormones, including estrogens, androgens, and progestins; therefore, allowing grazing livestock direct access to surface waters can result in the release of steroids in agricultural watersheds. Elevated concentrations of steroids are problematic because low concentrations of certain steroids can affect fish reproduction. To assess the occurr...

Resource issues for the Great Barrier Reef (GBR) are characterised by heterogenous multiple users incurring diverse non-point source environmental impacts. Of particular concern is sediment and nutrient runoff caused by cattle grazing and sugar cane growing, among other practices in the lowland agricultural and upland grazing areas. In this paper we present a decision support tool for resource ...

To evaluate the relative influence of ecological and management factors on the probability of detecting cattle-fever tick (Boophilus microplus and Boophilus annulatus) infestations in rotational grazing systems, we adapted a simulation model of Teel et al. [J. Range Manage. 51 (1998) 501] that examines interactions among Boophilus ticks, cattle, and habitat type under rotational grazing systems...

Plant functional traits reflect species ecological strategies and determine how plants respond to environmental changes, however, dominant in the Inner Mongolia grassland adapt different grazing systems by changing their has not been systematically investigated. In this study, we established four 7-year treatments grassland: cattle grazing, sheep mixed no grazing. Fourteen of three ( Stipa gran...

Livestock grazing, which has a large influence on habitat structure, is associated with the widespread decline of various bird species across the world, yet there are few experimental studies that investigate how grazing pressure influences avian reproduction. We manipulated grazing pressure using a replicated field experiment, and found that the offspring sex ratio of a common upland passerine...

Widely -contrasting stocking rates and grazing schedule treatments were imposed upon a Mediterranean herbaceous community in northern Israel. Botanical composition was monitored for 3 years. The vegetative community was found to be highly resilient to the treatments. Perennial grasses and legumes were among the resilient plants. These results are consistent with the view that Mediterranean ecos...

Submission Form Title: Does cattle dung determine differences in germination responses of grazing increasers vs decreasers? Author(s): Carlos P. Carmona, Francisco M. Azcárate & Begoña Peco Institutional Affiliations: Department of Ecology. Universidad Autónoma. Madrid. Spain

Four hundred thirty-two yearling steers grazing tall fescue pastures were used to evaluate the effects of fescue cultivar and dried distillers grains (DDG) supplementation during the grazing phase on available forage, grazing gains, subsequent finishing gains, and carcass characteristics. Fescue cultivars evaluated were highendophyte ‘Kentucky 31’ and low-endophyte ‘Kentucky 31,’ ‘HM4,’ and ‘Ma...

The study was conducted at the Amazon Research Center CIMAZ - MACAGUAL of University Amazonia, Colombia, with a tropical rain forest climate (Af). behavior Bos taurus, indicus, and Caqueteño Creole cattle, animals were observed in paddocks three levels scattered tree cover density. pasture composed Braquiaria decumbens 35 days regrowth. Direct observations made from 9:00 a.m. to 5:00 p.m. 10-mi...

Brucellosis is an endemic disease in Zimbabwe caused by the genus Brucella. Brucella seroprevalence was recently reported to be high in the wildlife-livestock interface in the Chiredzi district and the neighbouring Gonarezhou National Park (GNP) in Zimbabwe, and higher amongst communal cattle with an abortion history and access to grazing in GNP than amongst communal cattle with no aborti...