Results 11 to 20 of about 2,577,258 (314)
Apparent survival of the salamander Salamandra salamandra is low because of high migratory activity [PDF]
Frontiers in Zoology, 2007 Abstract Background Understanding the demographic processes underlying population dynamics is a central theme in ecology. Populations decline if losses from the population (i.e., mortality and emigration) exceed gains (i.e., recruitment and immigration).
Schmidt, B R +2 more
openaire +7 more sources
Estimating apparent survival of songbirds crossing the Gulf of Mexico during autumn migration. [PDF]
Proc Biol Sci, 2018 Many migratory bird species are declining, and the migratory period may limit populations because of the risk in traversing large geographical features during passage. Using automated radio-telemetry, we tracked 139 Swainson's thrushes (Catharus ustulatus) departing coastal Alabama, USA and crossing the Gulf of Mexico to arrive in the Yucatan Peninsula,
Ward MP +7 more
europepmc +4 more sources
A new approach to the “apparent survival” problem: estimating true survival rates from mark–recapture studies [PDF]
Ecology, 2012 Survival estimates generated from live capture–mark–recapture studies may be negatively biased due to the permanent emigration of marked individuals from the study area. In the absence of a robust analytical solution, researchers typically sidestep this problem by simply reporting estimates using the term “apparent survival.” Here, we present a ...
Gilroy, J.J. +3 more
openaire +5 more sources
Faking Death: Survival Through Apparent Collapse
Part of the Memory Prism system. This essay examines how systems persist or terminate under extreme constraint. It focuses on strategies that emerge when continuation becomes difficult, unaffordable, or impossible. It applies the framework through: - Boards (limiting conditions and environmental constraints) - Identity (persistence, reduction,
Memory Prism
openalex +2 more sources
Diverse demographic factors influence apparent juvenile survival in a migratory songbird [PDF]
Ecosphere, 2021 To better understand the dynamics of avian populations and their role in population trends, we require an in‐depth understanding of the factors influencing the survival of adults and juveniles.
Emma M. White +3 more
doaj +2 more sources
Evidence that a Highway Reduces Apparent Survival Rates of Squirrel Gliders [PDF]
Ecology and Society, 2010 Roads and traffic are prominent components of most landscapes throughout the world, and their negative effects on the natural environment can extend for hundreds or thousands of meters beyond the road.
Sarah C. McCall +5 more
doaj +2 more sources
Apparent survival and return rate in the Saffron Finch Sicalis flaveola , a species with age-related phenotypes [PDF]
Journal of Field OrnithologyWe studied the return rate, apparent survival, and probability of recapture of the Saffron Finch ( Sicalis flaveola pelzelni ), a thraupid with sexual dichromatism and age-related male feather phenotypes; the second-year males are dull and ...
Andrés G Palmerio, Viviana Massoni
doaj +2 more sources
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 +5 more
doaj +2 more sources
Journal of Avian BiologySurvival is a life history trait that contributes most to population dynamics in long‐lived birds, and the study of individual characteristics is relevant for population conservation.
José Enrique Martínez +3 more
doaj +2 more sources
Diagnostic and Interventional RadiologyBevacizumab is a common strategy for the treatment of recurrent glioblastoma. Survival status is a crucial issue for patients with recurrent glioblastoma, and the apparent diffusion coefficient (ADC) values of the lower Gaussian curve have been reported ...
Dong Liu, Zhangyu Li
doaj +2 more sources