Results 51 to 60 of about 501,741 (157)

Rejection of Schmidt et al.'s estimators for bear population size

Ecology and Evolution, 2019
Aerial distance sampling of bears to estimate population size has been used throughout many parts of Alaska. The distance sampling models are complex since they need to account for undetected bears and differences in detection probabilities.
Earl Becker, Aaron Christ
doaj   +1 more source

Sample-Based Distance-Approximation for Subsequence-Freeness

Algorithmica
AbstractIn this work, we study the problem of approximating the distance to subsequence-freeness in the sample-based distribution-free model. For a given subsequence (word)$$w = w_1 \ldots w_k$$w=w1…wk, a sequence (text)$$T = t_1 \ldots t_n$$T=t1…tnis said to containwif there exist indices$$1 \le i_1< \cdots < i_k \le n$$1≤i1<⋯<ik≤nsuch ...
Omer Cohen Sidon, Dana Ron
openaire   +5 more sources

An Active Tutorial on Distance Sampling [PDF]

Journal of Statistics Education, 2007
The technique of distance sampling is widely used to monitor biological populations. This paper documents an in-class activity to introduce students to the concepts and the mechanics of distance sampling in a simple situation that is relevant to their own experiences. Preparation details are described. Variations and extensions to the activity are also
openaire   +1 more source

Population Density and Spatial–Temporal Niche Use of Ship Rats and Italian Wall Lizards on a Small Adriatic Island

Ecology and Evolution
Introduced rats are major drivers of biodiversity loss on islands, yet density‐based assessments of their interactions with native reptiles remain scarce.
Maja Perinović, Tomislav Gojak, Marko Glogoški, Luce Pavin, Hrvoje Čižmek, Duje Lisičić   +5 more
doaj   +1 more source

Roe deer population trend after reintroduction of Eurasian lynx within the Palatinate Forest: a first insight into a long-term study

European Journal of Ecology, 2021
After becoming extinct approximately 250 years ago in the Palatinate Forest, the first Eurasian lynx (Lynx lynx) were reintroduced within this area in 2016, with 20 lynx reintroduced in the following five years. We observed the roe deer population within
Carolin Tröger, Diress Tsegaye , Ulf Hohmann   +2 more
doaj  

Estimating effective survey duration in camera trap distance sampling surveys. [PDF]

Ecol Evol, 2023
Kühl HS, Buckland ST, Henrich M, Howe E, Heurich M.   +4 more
europepmc   +1 more source

Asymptotics of Distances Between Sample Covariance Matrices

IEEE Transactions on Signal Processing
This work considers the asymptotic behavior of the distance between two sample covariance matrices (SCM). A general result is provided for a class of functionals that can be expressed as sums of traces of functions that are separately applied to each covariance matrix.
Roberto Pereira 0001, Xavier Mestre, David Gregoratti   +2 more
openaire   +3 more sources

Pooling robustness in distance sampling: Avoiding bias when there is unmodelled heterogeneity. [PDF]

Ecol Evol, 2023
Rexstad E, Buckland S, Marshall L, Borchers D.   +3 more
europepmc   +1 more source

Monitoring whooping crane abundance using aerial surveys: Influences on detectability

Wildlife Society Bulletin, 2014
The whooping crane (Grus americana), an endangered species, has been counted on its winter grounds in Texas, USA, since 1950 using fixed‐wing aircraft. Many shortcomings of the traditional survey technique have been identified, calling into question its ...
Bradley N. Strobel, Matthew J. Butler
doaj   +1 more source

Assessing the effects of survey-inherent disturbance on primate detectability: Recommendations for line transect distance sampling. [PDF]

Primates, 2023
Bessone M, Kühl HS, Hohmann G, Herbinger I, N'Goran KP, Asanzi P, Da Costa PB, Dérozier V, Fotsing DBE, Ikembelo BB, Iyomi DM, Iyatshi BI, Kafando P, Kambere AM, Moundzoho BD, Musubaho LK, Fruth B.   +16 more
europepmc   +1 more source