نتایج جستجو برای: population growth parameters

تعداد نتایج: 1977652  

A. Mahdavi M. Towhidi

This article aims to provide a simple robust method to test the parameters of a normal population by using the new diagnostic tool called the “Forward Search” (FS) method. The most commonly used procedures to test the mean and variance of a normal distribution are Student’s t test and Chi-square test, respectively. These tests suffer from the presence of outliers. We introduce the FS version of...

2012
Jacob E. Crawford Brian P. Lazzaro

Next-generation sequencing (NGS) technologies have made it possible to address population genetic questions in almost any system, but high error rates associated with such data can introduce significant biases into downstream analyses, necessitating careful experimental design and interpretation in studies based on short-read sequencing. Exploration of population genetic analyses based on NGS h...

2017
P. Mohamadi J. Razmjou B. Naseri M. Hassanpour

The tomato leafminer, Tuta absoluta (Meyrick) is a devastating pest associated with tomato. In this study, effects of tomato plants treated with vermicompost (20, 40, and 60%), humic fertilizer (2, 4 and 6 g/kg soil) and plant growth promoting rhizobacteria (Pseudomonas fluorescens and Bacillus subtilis) were investigated on the life table parameters of T. absoluta in a growth chamber at 25 ± 2...

Journal: :Applied and environmental microbiology 2014
Kathleen Boons Estefanía Noriega Rob Van den Broeck Charlotte C David Johan Hofkens Jan F Van Impe

Current literature acknowledges the effect of food structure on bacterial dynamics. Most studies introduce this "structure" factor using a single gelling agent, resulting in a homogeneous environment, whereas in practice most food products are heterogeneous. Therefore, this study focuses on heterogeneous protein-polysaccharide mixtures, based on gelatin and dextran. These mixtures show phase se...

2009
Ana Maria Bezerra Oliveira Lôbo Raimundo Nonato Braga Lôbo Samuel Rezende Paiva Sônia Maria Pinheiro de Oliveira Olivardo Facó

The genetic parameters for growth, reproductive and maternal traits in a multibreed meat sheep population were estimated by applying the Average Information Restricted Maximum Likelihood method to an animal model. Data from a flock supported by the Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC) were used. The traits studied included birth weight (BW), weaning weight (...

2009
Hui-Yu Wang Tomas O Höök

Eco-genetic individual-based models involve tracking the ecological dynamics of simulated individual organisms that are in part characterized by heritable parameters. We developed an eco-genetic individual-based model to explore ecological and evolutionary interactions of fish growth and maturation schedules. Our model is flexible and allows for exploration of the effects of heritable growth ra...

Journal: :Ecology Letters 2008
André M De Roos

I present a computational approach to calculate the population growth rate, its sensitivity to life-history parameters and associated statistics like the stable population distribution and the reproductive value for exponentially growing populations, in which individual life history is described as a continuous development through time. The method is generally applicable to analyse population g...

2014
Gian Marco Palamara Dylan Z Childs Christopher F Clements Owen L Petchey Marco Plebani Matthew J Smith

Understanding and quantifying the temperature dependence of population parameters, such as intrinsic growth rate and carrying capacity, is critical for predicting the ecological responses to environmental change. Many studies provide empirical estimates of such temperature dependencies, but a thorough investigation of the methods used to infer them has not been performed yet. We created artific...

Journal: :نامه انجمن حشره شناسی ایران 0
حاجی محمد تکلوزاده . کریم کمالی . علی اصغر طالبی . یعقوب فتحی پور .

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