Estimating Detection Probabilities From Multiple-Observer Point Counts
نویسندگان
چکیده
منابع مشابه
Estimating the effects of detection heterogeneity and overdispersion on trends estimated from avian point counts.
Point counts are a common method for sampling avian distribution and abundance. Although methods for estimating detection probabilities are available, many analyses use raw counts and do not correct for detectability. We use a removal model of detection within an N-mixture approach to estimate abundance trends corrected for imperfect detection. We compare the corrected trend estimates to those ...
متن کاملEstimating Probabilities of Detection for Bat Echolocation Calls: An Application of the Double- Observer Method
Differential detectability is an issue of great practical importance in bat species (Order Chiroptera) surveys. Bat echolocation recorders increasingly are being used in survey efforts, but recorder-based surveys have not measured differences in detection probability quantitatively. A recently developed avian survey technique uses 2 observers at a site to estimate the probability of detection b...
متن کاملEstimating phylogenetic trees from pairwise likelihoods and posterior probabilities of substitution counts.
The field of phylogenetic tree estimation has been dominated by three broad classes of methods: distance-based approaches, parsimony and likelihood-based methods (including maximum likelihood (ML) and Bayesian approaches). Here we introduce two new approaches to tree inference: pairwise likelihood estimation and a distance-based method that estimates the number of substitutions along the paths ...
متن کاملPoint Counts of Birds: What Are We Estimating?
Point counts of birds are made for many reasons, including estimating local densities, determining population trends, assessing habitat preferences, and exploiting the activities of recreational birdwatchers. Problems arise unless there is a clear understanding of what point counts mean in terms of actual populations of birds. Criteria for conducting point counts depend strongly on the purposes...
متن کاملEstimating Joint Probabilities from Marginal Ones
Estimating joint probabilities plays an important role in many data mining and machine learning tasks. In this paper we introduce two methods, minAB and prodAB, to estimate joint probabilities. Both methods are based on a light-weight structure, partition support . The core idea is to maintain the partition support of itemsets over logically disjoint partitions and then use it to estimate joint...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Auk
سال: 2006
ISSN: 1938-4254,0004-8038
DOI: 10.1093/auk/123.4.1172