Results 141 to 150 of about 9,556 (282)

Fishing gear experiments in Finland [PDF]

, 1981
A comparison of some different European methods of estimating the numbers of fish in a lake using different fishing gear is described. The different gears used were 1. surface trawl used by night 2. bottom trawl used by day 3.
Bagenal, T.B.
core  

Estimating demographic parameters using a combination of known-fate and open N-mixture models

, 2015
1. Accurate estimates of demographic parameters are required to infer appropriate ecological relationships and inform management actions. Recently developed N-mixture models use count data from unmarked individuals to estimate demographic parameters, but
Adams, Layne G., Johnson, Devin S., Lindberg, Mark S., Schmidt, Joshua H.   +3 more
core   +1 more source

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

Wildlife 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, Dylan L. Bakner, Hannah C. Sabatier, Benjamin S. Sedinger, Christopher A. Nicolai, Kevin M. Ringelman   +5 more
wiley   +1 more source

A comparison of abundance estimators for small mammal populations

Zoologia (Curitiba), 2013
A major difficulty in the application of probabilistic models to estimations of mammal abundance is obtaining a data set that meets all of the assumptions of the model.
Marcelle Pacheco, Maja Kajin, Rosana Gentile, Priscilla L. Zangrandi, Marcus V. Vieira, Rui Cerqueira   +5 more
doaj  

Abundance estimates of eastern black rails in southeastern Colorado

Wildlife Society Bulletin, EarlyView.
This study estimated eastern black rail (Laterallus jamaicensis jamaicensis) detection, occupancy, and abundance in southeastern Colorado. We found detection probability increased later in the season and later at night but decreased with ambient noise. Occupancy increased with residual vegetation height and detection of Virginia rail (Rallus limicola).
Eleonora M. Hargett, Thomas J. Benson, Liza Rossi, Auriel M. V. Fournier   +3 more
wiley   +1 more source

Integrating fecal DNA and telemetry to estimate wildlife densities in anthropogenic landscapes

Wildlife Society Bulletin, EarlyView.
Density estimation is central to wildlife management efforts but can be challenging in anthropogenic landscapes due to small parcel sizes, access restrictions, and limited green space. We evaluated (a) the use of a plot‐based spatial capture‐recapture sampling design to estimate deer density in developed landscapes and (b) if integrating telemetry data
Ashley Lynn, Mikiah McGinn, Nathan J. Hostetter, Heather Evans, Christopher E. Moorman, Nils Peterson, John Kilgo, Elizabeth M. Kierepka   +7 more
wiley   +1 more source

First Vasectomy Procedure Successfully Performed on a Southern African Male Giraffe (Giraffa camelopardalis giraffa)

Zoo Biology, EarlyView.
First successful vasectomy in a southern African male giraffe, Giraffa camelopardis giraffa ABSTRACT This study reports the first successful vasectomy on a southern African male giraffe (Giraffa camelopardalis giraffa). The goal of the procedure was to create a teaser male for reproductive studies.
Francois Deacon, Willem Daffue, Edward Collin Albertyn, Susanna Maria Krüger, Ayanda Maqhashu, Jacquiline Goedhals, Andri Grobbelaar, Marike Badenhorst   +7 more
wiley   +1 more source

Modeling and Mapping Coyote (Canis latrans) Abundance in Northwestern Vermont [PDF]

, 2018
Predators such as, coyotes (Canis latrans), have profound effects on ecosystems. Coyotes are recent arrivals in the northeastern United States of America, and in Vermont their ecology remains poorly understood.
Beck, Lucas Karl
core   +1 more source

Surface Flashover in 50 Years: III. Extreme Environments and Industrial Challenges

High Voltage, EarlyView.
ABSTRACT Modern high‐voltage electrical equipment operates in complex environments where surface conditions are subjected to multifaceted influences from electric fields, thermal gradients, contaminants, irradiation and other extreme environmental factors.
Zhen Li, Heng Zhang, He Gao, Ji Liu, Yoshimichi Ohki, George Chen, Shengtao Li   +6 more
wiley   +1 more source

A multi‐trait evaluation of patterns and fitness consequences of breeding phenology plasticity with nocturnal warming and food restriction in a lizard

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Faced with climate warming, ectothermic species shift their breeding phenology, which is in part attributed to an acceleration of gestation or incubation in warmer environments.
Théo Bodineau, Pierre de Villemereuil, Baptiste Lemaire, Simon Agostini, Beatriz Decencière, Matéo Millet, Sandrine Meylan, Jean‐François Le Galliard   +7 more
wiley   +1 more source