Results 51 to 60 of about 2,293 (139)

Monitoring African Megafauna in an Anthropogenic Landscape: A 15‐Year Case Study of the Vulnerable West African Giraffe

Animal Conservation, EarlyView.
We used pattern recognition software to correct misidentifications in a 15‐year photographic database of the last, vulnerable West African giraffe population in Niger. After revealing substantial methodological errors that had inflated population estimates by nearly 19%, we corrected individual encounter histories and applied capture‐mark‐recapture ...
Mara Vukelić, Ella W. White, Julian Fennessy, Abdoul Razack Moussa Zabeirou, Kateřina Gašparová, Simon Valle, Michael B. Brown, Thomas Rabeil, Karolína Brandlová   +8 more
wiley   +1 more source

Modelos jerárquicos de marcaje–recaptura: un marco para la inferencia de procesos demográficos [PDF]

, 2004
The development of sophisticated mark–recapture models over the last four decades has provided fundamental tools for the study of wildlife populations, allowing reliable inference about population sizes and demographic rates based on clearly formulated ...
Barker, R. J., Link, W. A.
core  

Distance of movement in three threatened butterfly species

Ecological Entomology, EarlyView.
Multi‐year mark–recapture analysis using net displacement and Cormack–Jolly–Seber models shows similar daily detectability (0.17–0.22) among species, supporting robust interspecific comparisons. Dispersal kernels differ: lognormal best for Euphydryas aurinia and Parnassius apollo, exponential for Phengaris arion; P.
Markus Franzén, Anders Forsman, Oskar Kindvall, Victor Johansson   +3 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

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

Inshore marine coastal zone migration patterns in Atlantic salmon post‐smolts emigrating from eight rivers in north‐east Scotland

Journal of Fish Biology, EarlyView.
Abstract Atlantic salmon, Salmo salar, migrate through multiple habitat types, each having the potential to impact differently upon migration success. The inshore marine coastal zone is arguably disproportionately impacted by potential stressors on populations.
Colin E. Adams, Ruaidhri Forrester, Matthew Newton, Angus J. Lothian, Hannele M. Honkanen, Davide Thambithurai, Lorna Wilkie, Melanie A. Smith, Marcus Walters, Richard Miller, Karen Muller, Brian Shaw, Steve Burns, Chris Conroy, Chris Daphne, Robert Laughton, Mirella Toth, Keith Williams, Sean Robertson, Ross Glover, Ben Seaman, Martyn C. Lucas, Louise Chavarie, Jessica R. Rodger   +23 more
wiley   +1 more source

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

Age‐Specific Survival Estimation of a Eurasian Crane Population Highlights a Long‐Term Decline in Juvenile Survival

Ecology and Evolution, Volume 16, Issue 2, February 2026.
The Eurasian crane (Grus grus), a symbol of conservation success in Europe, has made an impressive recovery. However, our results show that over the study period, juvenile survival declined by almost 30% overall, while sub‐adults experienced a smaller decrease, and adults showed no change.
Morgane Gicquel, Juan C. Alonso, Lovisa Nilsson, Matthew Low, Javier A. Alonso, Dmitrijs Boiko, Damon Bridge, Patrick Dulau, Thomas Heinicke, Anne Kettner, Yosef Kiat, Petras Kurlavičius, Sigvard Lundgren, Michael Modrow, Günter Nowald, Ivar Ojaste, Alain Salvi, Jostein Sandvik, Markéta Ticháčková, Antonio Torrijo, Jari Valkama, Zsolt Végvári, Johan Månsson   +22 more
wiley   +1 more source

Survival probabilities of loggerhead sea turtles (Caretta caretta) estimated from capture-mark-recapture data in the Mediterranean Sea

Scientia Marina, 2007
Survival probabilities of loggerhead sea turtles (Caretta caretta) are estimated for the first time in the Mediterranean by analysing 3254 tagging and 134 re-encounter data from this region. Most of these turtles were juveniles found at sea.
Paolo Casale, Antonios D. Mazaris, Daniela Freggi, Roberto Basso, Roberto Argano   +4 more
doaj   +1 more source

Physiology and Survival of Intertidal Calcifiers in Two Contrasting Upwelling Systems

Ecology and Evolution, Volume 16, Issue 2, February 2026.
This study evaluates the physiological responses and survival of two intertidal mollusk species, Chiton granosus and Scurria zebrina, across contrasting upwelling environments. We found that metabolic rates and survival differ between populations exposed to seasonal versus semi‐permanent upwelling.
Alejandro Hernández‐Dauval, Andrés Valenzuela‐Sánchez, Marco A. Lardies, Leonardo D. Bacigalupe   +3 more
wiley   +1 more source