Results 61 to 70 of about 1,203,677 (298)

Apparent survival and return rate in the Saffron Finch Sicalis flaveola , a species with age-related phenotypes

open access: yesJournal of Field Ornithology
We 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   +1 more source

Comparative analysis of factors associated with first‐year survival in two species of migratory songbirds

open access: yesJournal of Avian Biology, 2016
Our understanding of the full life cycle of most migratory birds remains limited. Estimates of survival rates, particularly for first‐year birds are notably lacking.
Noah G. Perlut, Allan M. Strong
doaj   +1 more source

Exceptionally high apparent adult survival in three tropical species of plovers in Madagascar

open access: yesJournal of Avian Biology, 2022
Adult survival is a key component of population dynamics, and understanding variation in and the drivers of adult survival rates and longevity is critical for ecological and evolutionary studies, as well as for conservation biology and practice. Tropical
William Jones   +8 more
doaj   +1 more source

Persistence pays: how viruses promote host group survival. [PDF]

open access: yes, 2009
Recently, we have realized that viruses numerically dominate all life. Although viruses are known to affect host survival in populations, this has not been previously evaluated in the context of host group selection.
Villarreal, Luis P
core  

Scale-free energy dissipation and dynamic phase transition in stochastic sandpiles

open access: yes, 1999
We study numerically scaling properties of the distribution of cumulative energy dissipated in an avalanche and the dynamic phase transition in a stochastic directed cellular automaton [B. Tadi\'c and D. Dhar, Phys. Rev. Lett. {\bf 79}, 1519 (1997)] in d=
A. Ben-Hur   +18 more
core   +1 more source

Geometric Parameterization of $J/\Psi$ Absorption in Heavy Ion Collisions [PDF]

open access: yes, 1998
We calculate the survival probability of $J/\Psi$ particles in various colliding systems using a Glauber model. An analysis of recent data has reported a $J/\Psi$-nucleon breakup cross section of 6.2$\pm$0.7 mb derived from an exponential fit to the ...
C. F. Qiao   +15 more
core   +2 more sources

Survival analysis for apparent diffusion coefficient measures in children with embryonal brain tumours [PDF]

open access: yesNeuro-Oncology, 2012
Embryonal brain tumors constitute a large and important subgroup of pediatric brain tumors. Apparent diffusion coefficient (ADC) measures have been previously used in the analysis of these tumors. We investigated a newly described ADC-derived parameter, the apparent transient coefficient in tumor (ATCT), a measure of the gradient change of ADC from the
Matthew, Grech-Sollars   +4 more
openaire   +2 more sources

Changes in Body Composition in Children and Young People Undergoing Treatment for Acute Lymphoblastic Leukemia: A Systematic Review and Meta‐Analysis

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Ongoing evidence indicates increased risk of sarcopenic obesity among children and young people (CYP) with acute lymphoblastic leukemia (ALL), often beginning early in treatment, persisting into survivorship. This review evaluates current literature on body composition in CYP with ALL during and after treatment.
Lina A. Zahed   +5 more
wiley   +1 more source

Climatic variation influences annual survival of an island‐breeding tropical shorebird

open access: yesJournal of Avian Biology
Global biodiversity loss is a major environmental concern. The wildlife on islands are particularly vulnerable to threats posed by alien predators, habitat loss and overexploitation.
Noémie Engel   +6 more
doaj   +1 more source

Do greater sage‐grouse exhibit maladaptive habitat selection?

open access: yesEcosphere, 2021
Maladaptive habitat selection, where animals select habitat with reduced fitness potential or avoid otherwise suitable habitat, exacerbates the threat of population decline for species vulnerable from habitat loss and fragmentation.
Aaron C. Pratt, Jeffrey L. Beck
doaj   +1 more source

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