Results 81 to 90 of about 18,168 (193)

Changing numbers of three gull species in the British Isles [PDF]

open access: yes, 2016
Between-population variation of changes in numbers can provide insights into factors influencing variation in demography and how population size or density is regulated.
Nager, Ruedi G., O'Hanlon, Nina J.
core   +1 more source

Drone‐based radiotelemetry and imagery systems provide an advantage over traditional techniques for estimating survival of dependent juveniles

open access: yesWildlife Society Bulletin, EarlyView.
We used drone‐based radiotelemetry and multispectral imagery to estimate detection and survival probabilities of blue‐winged teal broods in Saskatchewan, Canada. Weekly brood survival probabilities, estimated via Cormack‐Jolly‐Seber models, increased with age and were comparable between drone methods.
Grant A. Rhodes   +5 more
wiley   +1 more source

Outbreak of avian botulism and its effect on waterbirds in the Wilderness Lakes, South Africa

open access: yesKoedoe: African Protected Area Conservation and Science, 2019
Avian botulism has been reported in many areas worldwide, particularly in North America, where at times it has resulted in die-offs of hundreds of thousands of waterbirds.
Ian A. Russell   +3 more
doaj   +1 more source

Can aggregate quarry silt lagoons provide resources for wading birds? [PDF]

open access: yes, 2017
Wading birds have declined across Europe as the intensification of lowland agriculture has resulted in the loss and degradation of wetland areas. Lowland aggregate extraction sites that incorporate areas of fine, waste sediments deposited in silt lagoons
Day, George   +3 more
core   +2 more sources

Design considerations for breeding waterfowl surveys

open access: yesWildlife Society Bulletin, EarlyView.
This study evaluated how different survey designs affect the accuracy and precision of breeding waterfowl population estimates in Iowa's Prairie Pothole Region. Using aerial survey data from 2016–2018, we found that conducting at least 2 visits per season reduced bias in pair estimates, particularly for wood ducks and blue‐winged teal, while mallard ...
Tyler M. Harms   +2 more
wiley   +1 more source

Changing Migratory Behaviors and Climatic Responsiveness in Birds

open access: yesFrontiers in Ecology and Evolution, 2019
Change of avian migratory behavior is one of the best-studied phenomena presumably associated with contemporary climate change, yet to what degree these behavioral changes represent responses to climate warming is still controversial.
Veronika Bókony   +2 more
doaj   +1 more source

Review of Seabird Demographic Rates and Density Dependence. JNCC Report no. 552 [PDF]

open access: yes, 2015
Introduction This report presents individual species accounts for a selection of British seabirds, sea ducks, divers and grebes. Each account gathers the most up to date published estimates on the following demographic parameters: age-specific ...
Horswill, Catharine, Robinson, Robert A.
core  

Colonization and dispersal patterns of the invasive American brine shrimp Artemia franciscana (Branchiopoda: Anostraca) in the Mediterranean region [PDF]

open access: yes, 2013
Cysts of the brine shrimp Artemia franciscana are harvested from the Great Salt Lake (GSL) and San Francisco Bay (SFB) saltworks in the USA, and marketed worldwide to provide live food for aquaculture.
Amat, Francisco   +5 more
core   +2 more sources

Seasonal variation in wild pig (Sus scrofa) diet revealed by DNA metabarcoding

open access: yesWildlife Society Bulletin, EarlyView.
Using DNA metabarcoding of fecal samples, we investigated the diet of wild pigs at an extensive bottomland hardwood forest ecosystem within Felsenthal National Wildlife Refuge in Southern Arkansas. We found that wild pig diet was highly diverse and included at least 74 plant families and 106 genera and 23 species of vertebrates.
Kenneth C. Wilson   +3 more
wiley   +1 more source

Home Browse Journal Info Guide for Authors Submit Manuscript Reviewers Contact Us Serological survey of high and low pathogenic avian influenza viruses in migratory waterbirds of Neor Lake, Ardabil, northwest of Iran [PDF]

open access: yesJournal of Zoonotic Diseases
Avian influenza viruses (AIV) are a highly contagious disease with economic and public health impact that belongs to the Orthomyxoviridae family. Wild migratory waterbirds are known as the main reservoirs of AVI which can distribute viruses to poultry ...
Aidin Azizpour, Zahra Amirajam
doaj   +1 more source

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