Brucellosis in Free-ranging Bison (Bison bison) from Teton County, Wyoming

1993 ◽  
Vol 29 (1) ◽  
pp. 118-122 ◽  
Author(s):  
E. S. Williams ◽  
E. T. Thorne ◽  
S. L. Anderson ◽  
J. D. Herriges
Keyword(s):  
2005 ◽  
Vol 19 (3) ◽  
pp. 219-225 ◽  
Author(s):  
J.L.E. Ellingson ◽  
J.R. Stabel ◽  
R.P. Radcliff ◽  
R.H. Whitlock ◽  
J.M. Miller

1996 ◽  
Vol 32 (2) ◽  
pp. 322-325 ◽  
Author(s):  
Sharon K. Taylor ◽  
Alton C. S. Ward ◽  
David L. Hunter ◽  
Kerry Gunther ◽  
Lloyd Kortge
Keyword(s):  

2016 ◽  
Vol 33 (07) ◽  
pp. 102-107
Author(s):  
Tadeusz KoÅ›la ◽  
MichaÅ‚ Skibniewski ◽  
Ewa M. Skibniewska ◽  
Marta Kołnierzak

1993 ◽  
Vol 20 (6) ◽  
pp. 739 ◽  
Author(s):  
NC Larter ◽  
P Arcese ◽  
R Rajamahendran ◽  
CC Gates

We measured the concentration of immunoreactive progestins extracted from 41 faecal samples of female wood bison (Bison bison athabascae) as a potential indicator of pregnancy. The concentration of faecal progestins fell into two distinct groups, with an approximate 4-fold difference in mean progestin level (1391.9ng g-1 and 58269ng g-1). We suggest that measuring progestin concentration in the faeces of free-ranging animals is a non-invasive method that could be used to assess pregnancy rate.


2015 ◽  
Vol 42 (4) ◽  
pp. 315 ◽  
Author(s):  
Thomas S. Jung ◽  
Kazuhisa Kuba

Context Global positioning system (GPS) collars are increasingly used to study animal ecology. However, understanding their real-world performance is important so that biases in data collection can be addressed. These biases may be species specific. Few studies have examined the influence of sex or temporal variation on locational fix success rates (FSR), and none has assessed GPS-collar performance on bison (Bison bison). Aims To test for sex- and temporal-based biases on the performance of GPS collars on free-ranging bison. Methods Data from 59 deployments of 37 GPS collars on 27 female and seven male bison was used to test for temporal variation and differences between sexes on collar-deployment success rates and four fix acquisition metrics. Key results Most (72.9%) of the 55 GPS collars retrieved malfunctioned before reaching their expected deployment schedule (2 years). We observed a significant difference in the performance of GPS collars deployed on male and females, with those on females functioning almost three times longer. All four fix metrics differed between sexes, with males having significantly better metrics. For females, nightly fix metrics were better than the daytime ones, whereas for males, there was no difference. We observed a significant difference in fix metrics between seasons for females, but not males. Conclusions Although the data from GPS collars may be useful in understanding animal ecology, understanding associated biases can aid in the design of field studies using, and the interpretation of results stemming from, GPS collars. Temporal variation in our study was apparent for females, but not males, and likely related to differences in habitat use and movements. Overall, sex had a significant influence on the success of GPS-collar deployments on bison, and should be examined for other species as well. Implications Bison damage to the collars was the main reason for collar failures. Researchers should plan for catastrophic failures and malfunctions when deploying GPS collars on bison, particularly adult males. Significant differences observed between daily and seasonal FSR for females were small (≤4.9%), and do not warrant post hoc treatment before analyses.


Therya ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 171-175
Author(s):  
James H. Shaw

Populations of North American bison (Bison bison) are widely presumed to have remained stable, numbering in the tens of millions, right up until the hide hunts of the 1870s nearly brought about extinction.  Recent scholarship from various disciplines consistently undermines this presumption.  Indigenous people likely affected bison populations from their arrival toward the end of the Pleistocene.  By the time of Columbus, indigenous populations were high and their impacts were felt keenly.  As documented in the 16th century journals of Cabeza de Vaca, big game populations, including bison, were suppressed by hunting.  That changed, however, with arrival of Old World diseases that are estimated to have reduced indigenous populations in the Americas by 90 % within a century of contact with Europeans.  Such drastic reductions in indigenous human populations allowed bison populations to expand.  Gradually, increased pressure from human hunters, along with competition from feral horses, introduced infectious diseases, habitat changes, and droughts, all suppressed bison populations well before the notorious hide hunts began in the 1870s.  The hide hunts were the final blow to free-ranging bison, but reduced populations in the decades prior paved the way and helps explain why bison were reduced to near extinction within a few years.


PLoS ONE ◽  
2016 ◽  
Vol 11 (2) ◽  
pp. e0147404 ◽  
Author(s):  
Amandine Ramos ◽  
Odile Petit ◽  
Patrice Longour ◽  
Cristian Pasquaretta ◽  
Cédric Sueur

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