Abstract：
:With the internet, a massive amount of information on species abundance can be collected by citizen science programs. However, these data are often difficult to use directly in statistical inference, as their collection is generally opportunistic, and the distribution of the sampling effort is often not known. In this article, we develop a general statistical framework to combine such "opportunistic data" with data collected using schemes characterized by a known sampling effort. Under some structural assumptions regarding the sampling effort and detectability, our approach makes it possible to estimate the relative abundance of several species in different sites. It can be implemented through a simple generalized linear model. We illustrate the framework with typical bird datasets from the Aquitaine region in south-western France. We show that, under some assumptions, our approach provides estimates that are more precise than the ones obtained from the dataset with a known sampling effort alone. When the opportunistic data are abundant, the gain in precision may be considerable, especially for rare species. We also show that estimates can be obtained even for species recorded only in the opportunistic scheme. Opportunistic data combined with a relatively small amount of data collected with a known effort may thus provide access to accurate and precise estimates of quantitative changes in relative abundance over space and/or time.
journal_name
Biometricsjournal_title
Biometricsauthors
Giraud C,Calenge C,Coron C,Julliard Rdoi
10.1111/biom.12431subject
Has Abstractpub_date
2016-06-01 00:00:00pages
649-58issue
2eissn
0006-341Xissn
1541-0420journal_volume
72pub_type
杂志文章相关文献
BIOMETRICS文献大全abstract：:We propose a Bayesian latent Ornstein-Uhlenbeck (OU) model to analyze unbalanced longitudinal data of binary and ordinal variables, which are manifestations of fewer continuous latent variables. We focus on the evolution of such latent variables when they continuously change over time. Existing approaches are limited ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/biom.13292
更新日期：2020-05-11 00:00:00
abstract：:For the analysis of time trends in incidence and mortality rates, the age-period-cohort (apc) model has became a widely accepted method. The considered data are arranged in a two-way table by age group and calendar period, which are mostly subdivided into 5- or 10-year intervals. The disadvantage of this approach is t...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1997-03-01 00:00:00
abstract：:Procedures for estimating the genetic parameters of plant populations frequently employ progeny testing to ascertain the genotype of maternal plants. However, when experimental resources are limited (e.g., electrophoretic markers), the large progeny sizes required for accurate typing severely restricts the numbers of ...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1975-03-01 00:00:00
abstract：:A topic of current biometric discussion is whether stratification should be used in randomized clinical trials and, if so, which kind. An approach based upon randomization theory is used to evaluate pre- versus post-stratification. The results obtained relate specifically to the effect of the size of the clinical tria...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1983-03-01 00:00:00
abstract：:Conditional likelihood based on counting processes are combined with a Horvitz-Thompson estimator to yield a population size estimator that is more efficient than the existing ones. Random removals are allowed in the recapturing process. Simulation studies are shown to assess the performance of the proposed estimators...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.0006-341x.2002.00192.x
更新日期：2002-03-01 00:00:00
abstract：:This paper presents a comparison of three methods of parameter estimation in analysis of linkage between a quantitative trait locus (QTL) and a marker locus: maximum likelihood, mean square for trait cumulative distribution function, and method of moments, employing simulated backcross data. The sensitivity of estimat...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1996-06-01 00:00:00
abstract：:In this paper we consider the use of within-subject coefficient of variation (WCV) for assessing the reproducibility or reliability of a measurement. Application to assessing reproducibility of biochemical markers for measuring bone turnover is described and the comparison with intraclass correlation is discussed. Bot...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1996-12-01 00:00:00
abstract：:We consider the problem of comparing two outcome measures when the pairs are clustered. Using the general principle of within-cluster resampling, we obtain a novel signed-rank test for clustered paired data. We show by a simple informative cluster size simulation model that only our test maintains the correct size und...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2007.00923.x
更新日期：2008-06-01 00:00:00
abstract：:This paper presents an approach to handling missing covariates in the generalized estimating equation (GEE) model for binary outcomes when the probability of missingness depends on the observed outcomes and covariates. The proposed method is to replace the missing quantities in the estimating function with consistent ...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1997-12-01 00:00:00
abstract：:A method is developed for obtaining tree-structured relative risk estimates for censored survival data. The first step of a full likelihood estimation procedure is used in a recursive partitioning algorithm that adopts most aspects of the widely used Classification and Regression Tree (CART) algorithm of Breiman et al...
journal_title：Biometrics
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1992-06-01 00:00:00
abstract：:Epidemiologic data for case-control studies are often summarized into K 2 x 2 tables. Given a fixed number of cases and controls, the degree of sparseness in the data depends on the number of strata, K. The effect of increasing stratification on size and power of seven tests of homogeneity of the odds ratio is studied...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1989-03-01 00:00:00
abstract：:We study publication bias in meta-analysis by supposing there is a population (y, sigma) of studies which give treatment effect estimates y approximately N(theta, sigma(2)). A selection function describes the probability that each study is selected for review. The overall estimate of theta depends on the studies selec...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2006.00705.x
更新日期：2007-06-01 00:00:00
abstract：:Morrissey and Spiegelman (1999, Biometrics 55, 338 344) provided a comparative study of adjustment methods for exposure misclassification in case-control studies equipped with an internal validation sample. In addition to the maximum likelihood (ML) approach, they considered two intuitive procedures based on proposals...
journal_title：Biometrics
pub_type： 评论,杂志文章
doi：10.1111/j.0006-341x.2002.1034_1.x
更新日期：2002-12-01 00:00:00
abstract：:Multilist capture-recapture methods are commonly used to estimate the size of elusive populations. In many situations, lists are stratified by distinguishing features, such as age or sex. Stratification has often been used to reduce biases caused by heterogeneity in the probability of list membership among members of ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2007.00767.x
更新日期：2007-09-01 00:00:00
abstract：:Complex issues arise when investigating the association between longitudinal immunologic measures and time to an event, such as time to relapse, in cancer vaccine trials. Unlike many clinical trials, we may encounter patients who are cured and no longer susceptible to the time-to-event endpoint. If there are cured pat...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/1541-0420.00079
更新日期：2003-09-01 00:00:00
abstract：:This article develops a variety of influence measures for carrying out perturbation (or sensitivity) analysis to joint models of longitudinal and survival data (JMLS) in Bayesian analysis. A perturbation model is introduced to characterize individual and global perturbations to the three components of a Bayesian model...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2012.01745.x
更新日期：2012-09-01 00:00:00
abstract：:This article is motivated by a lung cancer study where a regression model is involved and the response variable is too expensive to measure but the predictor variable can be measured easily with relatively negligible cost. This situation occurs quite often in medical studies, quantitative genetics, and ecological and ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.0006-341X.2004.00255.x
更新日期：2004-12-01 00:00:00
abstract：:In multivariate recurrent event data regression, observation of recurrent events is usually terminated by other events that are associated with the recurrent event processes, resulting in informative censoring. Additionally, some covariates could be measured with errors. In some applications, an instrumental variable ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/biom.12857
更新日期：2018-09-01 00:00:00
abstract：:We extend the Mantel-Haenszel estimating function to estimate both the intra-cluster pairwise correlation and the main effects for sparse clustered binary data. We propose both a composite likelihood approach and an estimating function approach for the analysis of such data. The proposed estimators are consistent and ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2005.00362.x
更新日期：2005-12-01 00:00:00
abstract：:Neuroendocrine ensembles communicate with their remote and proximal target cells via an intermittent pattern of chemical signaling. The identification of episodic releases of hormonal pulse signals constitutes a major emphasis of endocrine investigation. Estimating the number, temporal locations, secretion rate, and e...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2005.00403.x
更新日期：2006-03-01 00:00:00
abstract：:A method is proposed for calculating the probabilities of assignment of a patient to treatments; it involves minimizing a quadratic criterion subject to a balance constraint. The optimal probabilities are very easy to compute. Numerical illustration is given and comparisons are drawn with the entropy-based methods of ...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1983-12-01 00:00:00
abstract：:A mean residual life function is the average remaining life of a surviving subject, as it varies with time. The proportional mean residual life model was proposed by Oakes and Dasu (1990, Biometrika77, 409-410) in regression analysis to study its association with related covariates in absence of censoring. In this art...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.0006-341X.2005.030224.x
更新日期：2005-03-01 00:00:00
abstract：:We propose methods for Bayesian inference for a new class of semiparametric survival models with a cure fraction. Specifically, we propose a semiparametric cure rate model with a smoothing parameter that controls the degree of parametricity in the right tail of the survival distribution. We show that such a parameter ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.0006-341x.2001.00383.x
更新日期：2001-06-01 00:00:00
abstract：:In the context of group testing screening, McMahan, Tebbs, and Bilder (2012, Biometrics 68, 287-296) proposed a two-stage procedure in a heterogenous population in the presence of misclassification. In earlier work published in Biometrics, Kim, Hudgens, Dreyfuss, Westreich, and Pilcher (2007, Biometrics 63, 1152-1162)...
journal_title：Biometrics
pub_type： 评论,杂志文章
doi：10.1111/biom.12385
更新日期：2016-03-01 00:00:00
abstract：:We consider the problem of testing for a difference in the probability of success from matched binary pairs. Starting with three standard inexact tests, the nuisance parameter is first estimated and then the residual dependence is eliminated by maximization, producing what I call an E+M P-value. The E+M P-value based ...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2007.00936.x
更新日期：2008-09-01 00:00:00
abstract：:For the same number of observations in a small-sample clinical trial with dichotomous outcome, the statistical power associated with a two-sample design, analyzed by Fisher's exact test, is slightly greater than that associated with a matched design, analyzed by McNemar's test, and hence of the matched design, is mono...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1982-09-01 00:00:00
abstract：:Eguchi and Matsuura (1990, Biometrics 46, 415-426) noted that the generalized Stevens test statistic for the Hardy-Weinberg law for human leukocyte antigen (HLA) data yields an excessively large value when no double blanks are observed. In this paper, we investigated this aberrant case. The inflated value of the test ...
journal_title：Biometrics
pub_type： 杂志文章
doi：
更新日期：1995-03-01 00:00:00
abstract：:We study the issue of identifiability of mixture models in the context of capture-recapture abundance estimation for closed populations. Such models are used to take account of individual heterogeneity in capture probabilities, but their validity was recently questioned by Link (2003, Biometrics 59, 1123-1130) on the ...
journal_title：Biometrics
pub_type： 评论,杂志文章
doi：10.1111/j.1541-0420.2006.00637_1.x
更新日期：2006-09-01 00:00:00
abstract：:This article introduces an original methodology based on empirical likelihood, which aims at combining different food contamination and consumption surveys to provide risk managers with a risk measure, taking into account all the available information. This risk index is defined as the probability that exposure to a c...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/j.1541-0420.2008.01051.x
更新日期：2009-03-01 00:00:00
abstract：:Interference occurs between individuals when the treatment (or exposure) of one individual affects the outcome of another individual. Previous work on causal inference methods in the presence of interference has focused on the setting where it is a priori assumed that there is "partial interference," in the sense that...
journal_title：Biometrics
pub_type： 杂志文章
doi：10.1111/biom.13125
更新日期：2020-03-01 00:00:00
