نتایج جستجو برای: abundance estimation

تعداد نتایج: 341921  

Journal: :محیط زیست طبیعی 0
حسین وارسته مرادی استادیار گروه محیط زیست، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ایران

population management of exploited species requires information on absolute density and abundance through reliable survey methods. the baseline information is further needed for population dynamics studies and determination of conservation status. the current population size of pheasant is totally unknown, because there is no official attempt to estimate population size in previous years. in th...

Journal: :CoRR 2016
Naveen Sivadasan Rajgopal Srinivasan Kshama Goyal

k-mers (nucleotide strings of length k) form the basis of several algorithms in computational genomics. In particular, k-mer abundance information in sequence data is useful in read error correction, parameter estimation for genome assembly, digital normalization etc. We give a streaming algorithm Kmerlight for computing the k-mer abundance histogram from sequence data. Our algorithm is fast an...

2017
Michael J. Conroy John Carroll Michael J Conroy

A large number of techniques are available for assessing populations of vertebrates. However, application of many of those tcchniques to Galliformes is hampered by a variety of constraints. These problems are often magnified by poor understanding of the biology of many species of concern, and an absence of valid estimates of abundance and demographic parameters. Researchers interested in develo...

Journal: :Biometrics 2010
Shirley Pledger Kenneth H Pollock James L Norris

Estimation of abundance is important in both open and closed population capture-recapture analysis, but unmodeled heterogeneity of capture probability leads to negative bias in abundance estimates. This article defines and develops a suite of open population capture-recapture models using finite mixtures to model heterogeneity of capture and survival probabilities. Model comparisons and paramet...

Journal: :Molecular ecology 2013
Per J Palsbøll M Zachariah Peery Morten T Olsen Steven R Beissinger Martine Bérubé

Recent historic abundance is an elusive parameter of great importance for conserving endangered species and understanding the pre-anthropogenic state of the biosphere. The number of studies that have used population genetic theory to estimate recent historic abundance from contemporary levels of genetic diversity has grown rapidly over the last two decades. Such assessments often yield unexpect...

2014
Heather J. Lynch Mathew R. Schwaller

The last several years have seen an increased interest in the use of remote sensing to identify the location of penguin colonies in Antarctica, and the estimation of the abundance of breeding pairs contained therein. High-resolution (sub-meter) commercial satellite imagery (e.g., Worldview-1, Quickbird) is capable of colony detection and abundance estimation for both large and small colonies, a...

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