Bias in abundance estimates using estimated param-
Bias in little owl population estimates using playback techniques during surveys
... hand, abundance estimates obtained simply by listening to sponta- neous calls or the response to broadcast calls are suspected of being affected by issues related with the studied population (Martínez & ...
6
The effect of animal movement on line transect estimates of abundance
... reduce bias in abundance estimates using the standard ...the bias. Here we have shown that bias can reach up to 10% for animal speeds of 50% – 80% of ob- server ...of bias ...
15
Estimates of cetacean abundance in European Atlantic waters in summer
... new estimates of g(0) are better than previously used corrections, which were limited to accounting only for availability bias (not perception bias) based on surfacing rates available from other ...
40
Bias Corrected Estimates of GED Returns
... groups using standard significance ...the estimated GED effect is essentially zero for males. The estimated effect for females is still slightly positive across all race groups but is always ...
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Point and interval estimates of abundance using multiple covariate distance sampling: an example using great bustards
... This technical report describes how to create those point and interval esti- mates. A companion piece of R code, written by Tiago Marques, is available on- line, and performs bootstrap variance estimation for an analysis ...
14
Using interviewer random effects to remove selection bias from HIV prevalence estimates
... all param- eters; however this approach would require additional prior probability distributions for all parameters and the implementation of a simulation procedure such as Markov Chain Monte Carlo ...prevalence ...
11
Attrition Bias in Economic Relationships Estimated with Matched CPS Files
... the estimates based on the full sample (M+N) and the sample of non-movers only (N) might still be statistically ...that estimates from matched CPS samples do not exhibit significant attrition ...the ...
45
Bias and Precision in QST Estimates: Problems and Some Solutions
... have either used the delta method or bootstrapped over individuals, methods that were found to give very mis- leading results, underestimating the variance (Figure 5). The methods that performed best, giving coverages ...
9
The bias in GRACE estimates of continental water storage variations
... and bias has been ...the bias has been derived, which shows explicitly the contribution to the bias of mass variations inside and outside the target ...the bias for the period January 2003 ...
15
Bias correction of simulated historical daily streamflow at ungauged locations by using independently estimated flow duration curves
... were estimated by the same explanatory variables, allowing only the fitted coefficients to ...reasonable estimates while minimizing the risk of non- monotonic or otherwise concerning ...were ...
18
Improving RNA Seq expression estimates by correcting for fragment bias
... of bias indir- ectly by inferring it from the data (fragment alignments) in an ...estimating bias, as Figure 2 demonstrates. At the same time, expression estimates made without correcting for ...
14
Reducing Bias from Choice Experiments Estimates in the Demand for Recreation
... equal. Using a t-test on α 6 , we can investigate the importance of the use value part of utility not explained by the variables in (1) and (2), hence helping to explain the choices made by individuals in the CE ...
16
Bias in sea turtle productivity estimates: error and factors involved
... size) using a large dataset (n = 8539) of actual and estimated clutch sizes of four sea turtle species (Caretta caretta, Chelonia mydas, Dermochelys coriacea, Eretmochelys ...
10
Preliminary estimates of the abundance and fidelity of dolphins associating with a demersal trawl fishery
... The abundance and density of bottlenose dolphins interacting with the PTF off north-western Australia appears to be lower than in comparable regions in the Gulf of Mexico, and similar in magnitude to some heav- ...
11
Bias correction of satellite rainfall estimates using a radar gauge product – a case study in Oklahoma (USA)
... Precipitation Estimates (SPEs) may be the only available source of information for oper- ational hydrologic and flash flood prediction due to spatial limitations of radar and gauge ...the bias of any of the ...
17
Bias and imprecision in posture percentile variables estimated from short exposure samples
... that estimates of the 10 th and 90 th upper arm elevation percentiles and the 10 th -90 th percentile range can be severely biased if they are esti- mated from posture samples collected over short peri- ods of ...
14
Reduction of bias when estimating bird abundance within small habitat fragments
... relative abundance in small habitat ...density estimates. Much of the international literature using counts and distance sampling estimation methods to claim increased bird diversity and ...
8
Time-of-day bias in diurnal raptor abundance and richness estimated by road surveys
... parallel routes running north-south, which were approximately 10 km apart. Each route was about 25 km long. Surveys were conducted from May 2007 to April 2008 at different times of day. The time of day was categorized in ...
9
Abundance Annex: Ape Population Abundance Estimates
... Notes on Tables 5 and 9: Gorillas are often sympatric with chimpanzees, meaning that they occupy the same geographic range. Biologists who survey great apes usually count their nests as proxies for the apes themselves; ...
41
Abundance Annex: Ape Population Abundance Estimates
... Notes on Tables 5 and 9: Gorillas are often sympatric with chimpanzees, meaning that they occupy the same geographic range. Biologists who survey great apes usually count their nests as proxies for the apes themselves; ...
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