Winter survival in woody plants is controlled by environmental and genetic factors that affect the plant's ability to cold acclimate. Because woody perennials are long-lived and often have a prolonged juvenile (pre-flowering) phase, it is conceivable that both chronological and physiological age factors influence adaptive traits such as stress tolerance. This study investigated annual cold hard...

Arguments from the comparative statics of populations with fixed vital rates are of limited use in studying age-structured populations subject to stochastically varying vital rates. In an age-structured population that experiences a sequence of independently and identically distributed Leslie matrices, the expectation of the Malthusian parameters of the Leslie matrices has no exact interpretati...

We establish convergence to the Kingman coalescent for a class of age-structured population models with time-constant population size. Time is discrete with unit called a year. Offspring numbers in a year may depend on mother's age. 1. Introduction. The well-known coalescent process describes how family lines merge in a sample from a large population, when time is traced backward. It is a conti...

We propose a method to approximate numerically the diffusion of an age-structured population in a spatial environment. We integrate separately the age and time variables by finite differences and we discretize the space variable by finite elements. The method is implicit in time and, inside each time step, implicit in age. We provide stability and convergence results and we illustrate our appro...

Pierre Toulon1; Micheline Berruyer2; Marie Brionne-François3; François Grand4; Dominique Lasne5; Caroline Telion6; Julien Arcizet2; Roberta Giacomello7; Neila De Pooter8 1Université Nice Sofia-Antipolis, CHU Pasteur, Service d’Hématologie Biologique, Nice, France; 2Laboratoire d’Hématologie, GH Est, Bron, France; 3Laboratoire d’Hématologie, CHU Côte de Nacre, Caen, France; 4Laboratoire d’Hémato...

A method is presented for estimating age-specific mortality based on minimal information: a model life table and an estimate of longevity. This approach uses expected patterns of mammalian survivorship to define a general model of agespecific mortality rates. One such model life table is based on data for northern fur seals (Callorhinus ursinu.r) using Siler’s ( 1979) 5-parameter competing risk...

Madlen Gazarian Paediatric Therapeutics Programme, School of Women’s and Children’s Health, University of New South Wales and Sydney Children’s Hospital; Level 3, Emergency Wing, Sydney Children’s Hospital, High Street, Randwick NSW 2031, Australia Tel.: +612 9382 1799 Fax: +612 9382 1401 m.gazarian@ unsw.edu.au “Extrapolation of the results of studies performed predominantly in middle-aged adu...

A number of tlutlic* rrjwrt an impairment of the genetically inherited ability to taste ITC a.% a function of age. but ignore the cumulative effect of smoking on taste deterioration. Thi* «tudy examine* the effect of aging on taste sensitivity in nonsmoking: Mennonite population*. The results obtained preclude a cause and effect relationship between age and ITC taste sensitivity. These results ...

We have incorporated the latest release of the Padova models into the evolutionary synthesis code Starburst99. The Padova tracks were extended to include the full asymptotic giant branch (AGB) evolution until the final thermal pulse over the mass range 0.9 to 5 M⊙. With this addition, Starburst99 accounts for all stellar phases that contribute to the integrated light of a stellar population wit...