Results 51 to 60 of about 4,195 (192)

The roles of sex, mass and individual specialisation in partitioning foraging-depth niches of a pursuit-diving predator [PDF]

open access: yes, 2013
Intra-specific foraging niche partitioning can arise due to gender differences or individual specialisation in behaviour or prey selection. These may in turn be related to sexual size dimorphism or individual variation in body size through allometry ...
Adlard, Stacey   +6 more
core   +2 more sources

Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba

open access: yesAvian Conservation and Ecology, 2021
Management of colonial waterbirds at regional, national, and continental scales requires up-to-date monitoring information on breeding locations, population sizes, and trends.
Ann E. McKellar   +2 more
doaj  

Avian influenza overview June–September 2025

open access: yesEFSA Journal, Volume 23, Issue 10, October 2025.
Abstract Between 7 June and 5 September 2025, 183 highly pathogenic avian influenza (HPAI) A(H5) virus detections were reported in domestic (27) and wild (156) birds across 15 countries in Europe. Although HPAI A(H5N1) virus detections were predominant in western and southwestern Europe, they also occurred on the northernmost coast of Norway. More than
European Food Safety Authority   +16 more
wiley   +1 more source

Birds of the North Gulf Coast - Prince William Sound Region, Alaska [PDF]

open access: yes, 1973
The North Gulf Coast - Prince William Sound region of Alaska, phytographically, lies at the northern limit of the Sitka Spruce-hemlock coastal/subalpine forests of the Pacific Coast; it includes approximately 178,500 km2 and a shoreline of approximately ...
Isleib, M. E., Kessel, Brina
core  

Bone Mineral Density of Willow Ptarmigan (Lagopus lagopus) as a Potential Taphonomic Factor in Skeletal Part Attrition

open access: yesInternational Journal of Osteoarchaeology, Volume 35, Issue 5, Page 284-294, September/October 2025.
ABSTRACT Agents of taphonomy can bias skeletal parts and the frequency of bones in archaeological sites. An important factor to consider is the possible effect of bone density‐mediated attrition on archaeornithological assemblages. We scanned willow ptarmigan (Lagopus lagopus) specimens using a Lunar iDXA and an enCcore small animal body add‐on to ...
Frank J. Dirrigl Jr.   +1 more
wiley   +1 more source

A Landscape Perspective on Bird Beak Deformity: An Epizootic of Unknown Etiology [PDF]

open access: yes, 2011
Although birds with beak deformities have been documented throughout the literature, the recent spike in occurrences in certain regions has caused concern in the scientific community.
McLaughlin, Rachelle, Menon, Shaily
core   +1 more source

Sinoatrial Contracaeciasis in Johnny Darters (Etheostoma nigrum) and Plains Topminnow (Fundulus sciadicus) From the South Platte Drainage, Colorado

open access: yesAquaculture, Fish and Fisheries, Volume 5, Issue 4, August 2025.
ABSTRACT Intra‐sinoatrial nematodes were incidentally recognized in wild‐caught Colorado Johnny Darters (Etheostoma nigrum, JD) in 2020–2021 and in Colorado Plains Topminnow (Fundulus sciadicus, PTM) in 2023‐2024. PTM and JD were evaluated histologically.
Paula Andrea Schaffer   +6 more
wiley   +1 more source

Validating accelerometry estimates of energy expenditure across behaviours using heart rate data in a free-living seabird [PDF]

open access: yes, 2017
Two main techniques have dominated the field of ecological energetics, the heart-rate and doubly labelled water methods. Although well established, they are not without their weaknesses, namely expense, intrusiveness and lack of temporal resolution.
Bishop, Charles   +5 more
core   +2 more sources

Epigenetic Responses to Anthropogenic Versus Natural Sources of Oil Exposure Differ in Wild Arctic Seabird Populations

open access: yesEvolutionary Applications, Volume 18, Issue 7, July 2025.
ABSTRACT Anthropogenic pollution can have detrimental effects on organismal physiology, behavior, and fitness, but the underlying genomic mechanisms mediating these effects are not well understood. Epigenetic regulation, such as DNA methylation, has been proposed as a potential mechanism mediating these effects, but currently, there are few studies in ...
Wing‐Zheng Ho   +12 more
wiley   +1 more source

Food for all: Small fish with big influence [PDF]

open access: yes, 2016
WWF-Canada recommendations to protect forage fish - based on 2012 report by the Lenfest Forage Fish Task Force, a group of 13 prominent fisheries scientists from around the ...

core  

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