Results 11 to 20 of about 1,870,807 (288)
Ecology and Evolution, 2022 Over the last 20 years, ecological restoration of degraded habitats has become common in conservation practice. Mountain hares (Lepus timidus scoticus) were surveyed during 2017–2021 using 830 km of line transects in the Peak District National Park ...
Carlos P. E. Bedson +6 more
doaj +1 more source
A method for estimating songbird abundance with drones
Drone Systems and Applications, 2022 Using drones to conduct airborne bioacoustics surveys is a potentially useful new way to estimate the abundance of vocal bird species. Here we show that by using two audio recorders suspended from a quadcopter drone it is possible to estimate distances ...
Andrew M. Wilson +5 more
doaj +1 more source
Long‐term monitoring of wildlife populations for protected area management in Southeast Asia
Conservation Science and Practice, 2022 Long‐term monitoring of biodiversity in protected areas (PAs) is critical to assess threats, link conservation action to species outcomes, and facilitate improved management. Yet, rigorous longitudinal monitoring within PAs is rare.
Matthew N. Nuttall +8 more
doaj +1 more source
Assessment and novel application of N‐mixture models for aerial surveys of wildlife
Ecosphere, 2021 Aerial surveys are a critical tool for inference of wildlife populations, yet are limited by current available methods to account for imperfect detection without marking animals.
Sonja A. Christensen +2 more
doaj +1 more source
Greedy $k$-Center From Noisy Distance Samples [PDF]
IEEE Transactions on Signal and Information Processing over Networks, 2021 We study a variant of the canonical k-center problem over a set of vertices in a metric space, where the underlying distances are apriori unknown. Instead, we can query an oracle which provides noisy/incomplete estimates of the distance between any pair of vertices.
Neharika Jali +2 more
openaire +2 more sources
Depth of Edge Influence in a Madagascar Lowland Rainforest and Its Effects on Lemurs’ Abundance
Land, 2022 Edge effects result from interactions between adjacent habitats, which can modify abiotic and biotic conditions and produce various negative effects on biodiversity.
Marco Campera +8 more
doaj +1 more source
Sample Out-of-Sample Inference Based on Wasserstein Distance [PDF]
Operations Research, 2021 Financial institutions make decisions according to a model of uncertainty. At the same time, regulators often evaluate the risk exposure of these institutions using a model of uncertainty, which is often different from the one used by the institutions. How can one incorporate both views into a single framework? This paper provides such a framework. It
Jose Blanchet, Yang Kang
openaire +3 more sources
Land, 2022 Appropriate field survey methods and robust modeling approaches play an important role in wildlife protection and habitat management because reliable information on wildlife distribution and abundance is important for conservation planning and actions ...
Xinhai Li +4 more
doaj +1 more source
Journal of Marine Science and Engineering, 2021 The dolphins Inia geoffrensis—boto and Sotalia fluviatilis—tucuxi are threatened cetaceans inhabiting river ecosystems in South America; population numbers are still lacking for many areas.
Mariana Paschoalini +10 more
doaj +1 more source
Egyptian Vulture in the Karatau Mountains and Adjacent Territories, Kazakhstan
Пернатые хищники и их охрана, 2022 Egyptian Vulture (Neophron percnopterus) is a globally threatened species. The northernmost limit of its breeding range is located in Kazakhstan and is fragmented into three large enclaves. The Karatau range is one such enclave. It was previously assumed
Igor V. Karyakin +5 more
doaj +1 more source