Results 41 to 50 of about 158,359 (216)

Using an individual-based model to assess common biases in lek-based count data to estimate population trajectories of lesser prairie-chickens.

open access: yesPLoS ONE, 2019
Researchers and managers are often interested in monitoring the underlying state of a population (e.g., abundance), yet error in the observation process might mask underlying changes due to imperfect detection and availability for sampling.
Beth E Ross   +2 more
doaj   +1 more source

Comparative evaluation of noninvasive DNA sampling and line transect surveys for spring density estimation of black grouse and capercaillie

open access: yesWildlife Biology, EarlyView.
Reliable abundance estimates provide essential information in ecology, conservation and management of many wild grouse populations. In this 3‐year study, we comparatively evaluate the suitability of traditional line transect distance sampling of flushed birds versus a spatial capture–recapture survey with noninvasive DNA samples for individual ...
Henrik Brøseth   +2 more
wiley   +1 more source

Evaluating fishermen’s conservation attitudes and local ecological knowledge of the European sardine (Sardina pilchardus), Peniche, Portugal

open access: yesJournal of Ethnobiology and Ethnomedicine, 2017
Background European sardines are an important fishing resource in the North Atlantic. Recognized for its great commercial and economic value in southern Europe, this resource currently has low stock indices.
Heitor O. Braga   +3 more
doaj   +1 more source

The performance of drones and artificial intelligence for monitoring sage‐grouse at leks

open access: yesWildlife Biology, EarlyView.
Accurately monitoring sage‐grouse populations is critical for conservation, yet traditional ground‐based visual surveys face challenges in scalability and consistency, prompting the exploration of innovative drone‐based methodologies enhanced by artificial intelligence.
Lance B. McNew   +2 more
wiley   +1 more source

Beyond abundance: the impact of sampling design on effective population size estimates in capercaillie

open access: yesWildlife Biology, EarlyView.
Effective population size (Ne) is a useful parameter to evaluate the long‐term viability of populations. While obtaining enough field data from wild populations to estimate Ne directly is challenging, molecular techniques applied to non‐invasive samples provide an appealing alternative.
María‐José Bañuelos, Mario Quevedo
wiley   +1 more source

Landscape features and seasonal habitat predict lek site selection and lek size of a Tympanuchus grouse

open access: yesEcosphere
The lek hotspot hypothesis predicts that leks will form in areas where males are more likely to encounter females, providing wildlife managers with a framework supporting the use of leks as the focus for prairie and shrubland grouse conservation and ...
Jonathan D. Lautenbach   +2 more
doaj   +1 more source

Fishers’ Local Ecological Knowledge (LEK) on Connectivity and Seascape Management

open access: yesFrontiers in Marine Science, 2019
In developing countries where data and resources are lacking, the practical relevance of local ecological knowledge (LEK) to expand our understanding of the environment, has been highlighted. The potential roles of the LEK varies from direct applications
Charlotte Berkström   +4 more
doaj   +1 more source

Investigating the reward cycle for play in young pigs [PDF]

open access: yes, 2013
A reward cycle for investigating the emotional status in animals has been developed and it requires that animals go through three main phases, i.e. anticipation, consumption and relaxation.
Farhadi, Negar
core   +1 more source

Secants of minuscule and cominuscule minimal orbits [PDF]

open access: yes, 2014
We study the geometry of the secant and tangential variety of a cominuscule and minuscule variety, e.g. a Grassmannian or a spinor variety. Using methods inspired by statistics we provide an explicit local isomorphism with a product of an affine space ...
Laurent Manivel, Mateusz, Micha Lek
core   +3 more sources

Exploring marking methods for the predatory hoverfly Sphaerophoria rueppellii (Diptera: Syrphidae)

open access: yesInsect Science, EarlyView.
As important pollinators and predators of aphids, hoverflies play an important role in ecosystems. This study focuses on identifying the best marking technique for the model species Sphaerophoria rueppellii that can be used to track hoverfly feeding and oviposition sites, evaluating three methods: rubidium (RbCl), fluorescein, and fluorescent dusts ...
Michele Violi   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy