Results 21 to 30 of about 483,708 (267)
Avian Conservation and Ecology, 2018 Computer-automated image analysis techniques can save time and resources for detecting and counting birds in aerial imagery. Sophisticated object-based image analysis (OBIA) software is now widely available and has proven effective for various ...
Dominique Chabot +2 more
doaj +1 more source
Considering sampling bias in close‐kin mark–recapture abundance estimates of Atlantic salmon
Ecology and Evolution, 2021 Genetic methods for the estimation of population size can be powerful alternatives to conventional methods. Close‐kin mark–recapture (CKMR) is based on the principles of conventional mark–recapture, but instead of being physically marked, individuals are
Sebastian Wacker +6 more
doaj +1 more source
Dark energy and CMB bispectrum [PDF]
, 2004 We consider the CMB bispectrum signal induced by structure formation through the correlation between the Integrated Sachs-Wolfe and the weak lensing effect.
Baccigalupi, C., Giovi, F.
core +2 more sources
Global abundance estimates for 9,700 bird species [PDF]
Proceedings of the National Academy of Sciences, 2021 Significance For the fields of ecology, evolutionary biology, and conservation, abundance estimates of organisms are essential. Quantifying abundance, however, is difficult and time consuming. Using a data integration approach integrating expert-derived abundance estimates and global citizen science data, we estimate the global population of ...
Corey T. Callaghan +2 more
openaire +2 more sources
Global coverage of cetacean line-transect surveys : status quo, data gaps and future challenges [PDF]
, 2012 Knowledge of abundance, trends and distribution of cetacean populations is needed to inform marine conservation efforts, ecosystem models and spatial planning.
Harris, Catriona M +4 more
core +3 more sources
Arctic Science, 2018 The Southern Hudson Bay polar bear (Ursus maritimus Phipps, 1774) subpopulation is considered stable, but conflicting evidence lends uncertainty to that designation.
Martyn E. Obbard +5 more
doaj +1 more source
Using digital recordings and sonogram analysis to obtain counts of yellow rails
Wildlife Society Bulletin, 2016 Autonomous recording units (ARUs) are emerging as a useful technology for the study and monitoring of animals that produce vocalizations. During summer and fall of 2013, we performed a series of experiments aimed at developing sampling protocols to count
Kiel L. Drake +3 more
doaj +1 more source
Avian Conservation and Ecology, 2017 Autonomous recording units (ARUs) show promise for improving the spatial and temporal coverage of biodiversity monitoring programs, and for improving the resolution with which the behaviors of animals can be monitored on small spatial scales.
Richard W. Hedley, Yiwei Huang, Kung Yao
doaj +1 more source
Inoculum selection influences the biochemical methane potential of agro-industrial substrates [PDF]
, 2015 Obtaining a reliable estimation of the methane potential of organic waste streams in anaerobic digestion, for which a biochemical methane potential (BMP) test is often used, is of high importance.
Angenent, Largus T +7 more
core +2 more sources
Hybrid mark–resight approaches account for heterogeneous detection bias in aerial surveys
Ecological Solutions and Evidence, 2023 Population abundance estimation is a critical yet challenging task for wildlife management decision‐making. For aerial surveys of terrestrial mammals in highly heterogenous landscapes, estimation models that address multiple sources of detection bias are
Kylie M. Curtis +6 more
doaj +1 more source