Aerial Population Estimates of Wild Horses (Equus caballus) in the Adobe Town and Salt Wells Creek Herd Management Areas Using an Integrated Simultaneous Double-Count and Sightability Bias Correction Technique
نویسندگان
چکیده
...............................................................................................................................................................................
منابع مشابه
Practical Bias Correction in Aerial Surveys of Large Mammals: Validation of Hybrid Double-Observer with Sightability Method against Known Abundance of Feral Horse (Equus caballus) Populations
Reliably estimating wildlife abundance is fundamental to effective management. Aerial surveys are one of the only spatially robust tools for estimating large mammal populations, but statistical sampling methods are required to address detection biases that affect accuracy and precision of the estimates. Although various methods for correcting aerial survey bias are employed on large mammal spec...
متن کاملEstimation and Correction of Visibility Bias in Aerial Surveys of Wintering Ducks
Incomplete detection of all individuals leading to negative bias in abundance estimates is a pervasive source of error in aerial surveys of wildlife, and correcting that bias is a critical step in improving surveys. We conducted experiments using duck decoys as surrogates for live ducks to estimate bias associated with surveys of wintering ducks in Mississippi, USA. We found detection of decoy ...
متن کاملSUMMARY RESEARCH REPORT: BRITISH VETERINARY ASSOCIATION Comparative observations on strongyle parasites in domestic horses (Equus ferus caballus), Grevy’s zebra (Equus grevyi) and Plains zebra (Equus quagga boehmi) in Kenya – a pilot study
Grevy’s zebra (Equus grevyi) populations declined dramatically in the last decades of the 20 century. Though now stabilising, there has been an estimated 50-68% drop in numbers over the past 18 years (IUCN, 2012). While there are many threats facing the species, the role of parasite burdens in this decline is poorly understood. Lewa Wildlife Conservancy provides ex situ or marginal (transition ...
متن کاملPedigrees and the Study of the Wild Horse Population of Assateague Island National Seashore
Recently, a number of papers have addressed the use of pedigrees in the study of wild populations, highlighting the value of pedigrees in conservation management. We used pedigrees to study the horses (Equus caballus) of Assateague Island National Seashore, Maryland, USA, one of a small number of free-ranging animal populations that have been the subject of long-term studies. This population gr...
متن کاملA Detection Probability Model for Aerial Surveys of Mule Deer
Population estimates derived from aerial surveys of ungulates are biased by imperfect detection, where probability of sighting groups is influenced by variables specific to terrain features and vegetation communities. Therefore, methods for bias-correction must be validated for the region to which they will be applied. Our objectives were to quantify factors affecting detection probability of m...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007