Results 41 to 50 of about 2,297 (144)

Fate of orphans of Canada geese harvested by hunters in Connecticut, USA, depends upon which month the parents were killed

Wildlife Biology, EarlyView.
Little is known about what happens to juvenile birds after one or both of their parents are harvested by hunters during the post‐fledging dependency period. Here, we compare the fate of juvenile Canada geese Branta canadensis that lost ≥ 1 parent to hunters (orphans) during this period to other juveniles that retained both parents (non‐orphans). For 25
Michael R. Conover, Lauren J. Head
wiley   +1 more source

Estimating survival probabilities from ringing data [PDF]

, 2012
Die Ermittlung von Überlebenswahrscheinlichkeiten und Reproduktionsdaten hat eine wachsende Bedeutung als Basis für Populationsmodelle gewonnen. Wir haben Beringungen und Rückmeldungen aus dem Datenbestand der Beringungszentrale Hiddensee und die ...
Bellebaum, Jochen, Grajetzky, Bodo, Köppen, Ulrich   +2 more
core  

When is a parasite not a parasite? Effects of larval tick burdens on white-footed mouse survival [PDF]

, 2014
Many animal species can carry considerable burdens of ectoparasites: parasites living on the outside of a host's body. Ectoparasite infestation can decrease host survival, but the magnitude and even direction of survival effects can vary depending on the
Hersh, Michelle H., LaDeau, Shannon L., Ostfeld, Richard S., Previtali, Maria Andrea   +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

Consistent apparent adult survival and nest‐site fidelity of whimbrel Numenius phaeopus near Churchill, Manitoba, Canada over a 40 year period

Journal of Avian Biology, 2023
Reliable estimates of adult survival for many shorebird species are lacking. We used Cormack–Jolly–Seber (CJS) methods to provide an estimate of apparent, or local, survival (φ) of a population of whimbrels, Numenius phaeopus, breeding in the subarctic ...
Anne N. M. A. Ausems, Johanna Perz, Andrew Johnson, Nathan Senner, Margaret Skeel, Erica Nol   +5 more
doaj   +1 more source

Methodological advances [PDF]

, 2004
The study of population dynamics has long depended on methodological progress. Among many striking examples, continuous time models for populations structured in age (Sharpe & Lotka, 1911) were made possible by progress in the mathematics of integral ...
Lebreton, J.-D., Pollock, K. H.
core  

A recipe for postfledging survival in great tits Parus major: be large and be early (but not too much) [PDF]

, 2016
Survival of juveniles during the postfledging period can be markedly low, which may have major consequences on avian population dynamics. Knowing which factors operating during the nesting phase affect postfledging survival is crucial to understand avian
Belda E. J., Blem C. R., Blondel J., Burnham K. P., Burnham K. P., Burtt E. H. J., DiCostanzo J., Drent P. J., Kitowski I., Kluyver H. N., Matthysen E., Monrós J. S., O'Connor R. J., Perrins C. M., Perrins C. M., Ragusa‐Netto J., Rodríguez S., Shilov J. A., Skalski J. R., Starck J. M., Traylor J. J.   +20 more
core   +1 more source

Computationally efficient Bayesian capture–mark–recapture models with transients, applied to survival of hand‐reared African Penguins

Methods in Ecology and Evolution, EarlyView.
Abstract Mark–recapture models are the primary framework for estimating demographic parameters in wild organisms. Complex life histories and sampling processes demand complex model formulations, yet these are vulnerable to errors in implementation and unanticipated biases.
Murray Christian, W. Chris Oosthuizen, Katrin Ludynia, Barbara Barham, Peter Barham, Richard B. Sherley, Res Altwegg   +6 more
wiley   +1 more source

Evaluation of abundance indexes in open population studies: a comparison in populations of small mammals in southern Brazil

Brazilian Journal of Biology
Many manuscripts comparing populations and/or analysing the structure of animal communities use indexes of captures as synonymous of abundance. However, the basic methods more suitable to this assumption - probabilistic estimates based on equal capture ...
ME Graipel, MIM Hernández, C Salvador
doaj   +1 more source

A conversation with Richard M. Cormack [PDF]

, 2016
Richard Melville Cormack is one of the giants who developed the theory of mark-recapture. Referring to his key paper in 1964, and the papers published back-to-back in 1965 by George Jolly and George Seber, the `Cormack-Jolly-Seber model' is central to ...
Buckland, Stephen Terrence
core   +1 more source