A DOUBLE-OBSERVER APPROACH FOR ESTIMATING DETECTION PROBABILITY AND ABUNDANCE FROM POINT COUNTS

By James D. Nichols, J. Hines, John R. Sauer, F. Fallon, Jane E. Fallon, P. Heglund. 2000

650 citations recorded by the source corpus.

Subfields: Ecology, Epidemiology, Statistics and Probability

View Paper: https://www.semanticscholar.org/paper/0c376b5b8358a77dbd7fe7eac034bc769eab69cd

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Citations in the corpus

Making Great Leaps Forward: Accounting for Detectability in Herpetological Field Studies (2007, background): “Observer 1 indicates to observer 2 each time an animal is sighted, whereas observer 2 notes all animals seen by observer 1 as well as any individual missed by observer 1; observers switch roles halfway through the survey (Cook and Jacobson, 1979; Nichols et al., 2000).”
Generalized estimators of avian abundance from count survey data (2004, methodology): “These methods include those based multiple observer sampling (Cook & Jacobson, 1979; Nichols et al., 2000), temporary removal (Farnsworth et al., 2002), distance sampling (Rosenstock et al., 2002) and even simple point counts (Royle, 2004a).”
Bird diversity in cacao farms and forest fragments of western Panama (2007, methodology): “Two observers were present at each point count (Nichols et al. 2000).”
RELATIONSHIPS AMONG NORTH AMERICAN SONGBIRD TRENDS, HABITAT FRAGMENTATION, AND LANDSCAPE OCCUPANCY (2002, background): “…however, that the proportion of individuals detected can vary by observer, species, and geographic location (i.e., among states), the latter being potentially a function of differences in landscape structure and species composition (Sauer et al. 1994, Boulinier et al. 1998, Nichols et al. 2000).”
TIME-OF-DETECTION METHOD FOR ESTIMATING ABUNDANCE FROM POINT-COUNT SURVEYS (2007, background): “…that the observed count (xT) is from a binomial distribution and that xT and p̂T are independent, an estimate of the variance of abundance is (Nichols et al. 2000, Williams et al. 2002) (11) In general, four or more intervals are required to parameterize heterogeneity models, unless very…”
Absent or undetected? Effects of non-detection of species occurrence on wildlife-habitat models (2004, methodology): “Failure to detect species when they are present at a site is not uncommon in field surveys.For example, using double-observer surveys for avian point counts, Nichols et al.(2000) showed that a single observer missed varying proportions of the birds actually present.”
The 'standardized search': An improved way to conduct bird surveys (2003, background): “More recently, several reviews have highlighted the difficulties associated with estimating avian density, with factors including apparency and detectability known to differ among species, sites, seasons, and surveyors (Nichols et al. 2000; Pagen et al. 2002; Rosenstock et al. 2002).”
LANDBIRD COUNTING TECHNIQUES: CURRENT PRACTICES AND AN ALTERNATIVE (2002, neutral): “These protocols may reduce influence of some confounding factors; however, the critical assumption of constant detectability likely cannot be met in most studies (see Nichols et al. 2000).”
MODELING ABUNDANCE EFFECTS IN DISTANCE SAMPLING (2004, background): “In particular, it can be applied to problems where the multinomial likelihood is based on other sampling protocols such as multiple observer (Nichols et al. 2000), removal (Farnsworth et al. 2002), and even conventional capture–recapture when there are spatially indexed samples.”
BIRD ASSEMBLAGES IN SECOND-GROWTH AND OLD-GROWTH FORESTS, COSTA RICA: PERSPECTIVES FROM MIST NETS AND POINT COUNTS (2001, background): “Observers differ in ability to detect and identify birds (Nichols et al. 2000) leading to errors of commission (misidentification by sight or sound, errors in estimation of numbers, errors in estimating distance) and omission (lack of ability to hear certain fre- quencies, ignoring certain songs).”
Large scale wildlife monitoring studies: statistical methods for design and analysis (2002, methodology): “Nichols et al. (2000) developed a method for use with avian point counts with primary and secondary observers.”