An intriguing aspect of social foraging behaviour is that large groups are often no better at capturing prey than are small groups, a pattern that has been attributed to diminished cooperation (i.e., free riding) in large groups. Although this suggests the formation of large groups is unrelated to prey capture, little is known about cooperation in large groups that hunt hard-to-catch prey. Here...

We carried out a comparison of the signals seen in contemporaneous BiSON and GOLF data sets. Both instruments perform Doppler shift velocity measurements in integrated sunlight, although BiSON perform measurements from the two wings of potassium absorption line and GOLF from one wing of the NaD1 line. Discrepancies between the two datasets have been observed. We show,in fact, that the relative ...

The parasitic nature of the Brown-headed Cowbird (Molothrus ater) is believed to have developed as a result of its association with the bison (Bison bison). Cowbirds subsisted on insects flushed by herds of bison, however, the nomadic nature of the bison made it impossible for cowbirds to remain with the herd and simultaneously perform nesting activities. Theoretically the evolution of parasiti...

Visitors to zoos can be a source of potential disturbance and stress to some captive, nonhuman animals in the wild. To determine the influence of visitor presence on captive bison (Bos gaurus gaurus), the study analyzed the behavior of 4 individuals at the Arignar Anna Zoological Park, India. The study often observed the behavior of the animals on visitor-present days and on days when visitors ...

Between 1962 and 1971, six outbreaks of anthrax occurred in the bison herds of the Northwest Territories and northern Alberta. In response, the federal Health of Animals Branch dispatched staff veterinarians to oversee carcass disposal operations and later to take part in bison depopulation and vaccination programs. Recently, a collection of documents from that agency concerning the outbreaks w...

In this study, we analyzed complete mtDNA sequences variation and genetic relationship among taurine, indicine and Bison groups. In total, 107 sequences from different breeds, 45 European (45 Italian), 16 Middle East Asian (seven Iranian and nine Iraqi), 41 Northeast Asian (34 Korean and seven Japanese), two Nellore (Bos indicus) and two American Bison bison (Ame. bison) were obtained from Gen-...

Bacterial culture is the 'gold standard' for detecting Mycobacterium avium subspecies paratuberculosis (MAP) infection, but is time consuming, laborious, and recovery of organism varies with species of animal tested. PCR has been used for detection of MAP DNA in feces and tissues. We used PCR to detect MAP DNA isolated from tissues from 25 free-ranging North American bison (Bison bison), each w...