نتایج جستجو برای: benefit analyses of breeding strategies

تعداد نتایج: 21217258  

Journal: :The American naturalist 2014
Renato C Nali Kelly R Zamudio Célio F B Haddad Cynthia P A Prado

Sexual size dimorphism (SSD) varies in animals from male biased to female biased. The evolution of SSD is potentially influenced by a number of factors, such as territoriality, fecundity, and temporal breeding patterns (explosive vs. prolonged). In general, frogs show female-biased SSD with broad variance among species. Using comparative methods, we examine how different selective forces affect...

1989
Robert E. Marks

Oligopolistic pricing decisions in which the choice variable is not dichotomous as in the simple prisoner's dilemma but continuous have been modeled as a generalized prisoner's dilemma (GPD) by Fader and Hauser, who sought, in the two MIT Computer Strategy Tournaments, to obtain an effective generalization of Rapoport ' s Tit for Tat for the three-person repeated game. Holland's genetic algorit...

Journal: :Poultry science 2005
S Zerehdaran A L J Vereijken J A M van Arendonk H Bovenhuis E H van der Waaij

The objective of the current study was to determine the consequences of using indirect carcass measurements on the genetic response and rate of inbreeding in broiler breeding programs. In the base breeding scheme, selection candidates were evaluated based on direct carcass measurements on relatives. The possibilities of using indirect carcass measurements were investigated in alternative breedi...

Journal: :Journal of dairy science 1994
J C Dekkers

Calving ease is of economic importance in dairy cattle and should be considered in breeding programs. Economic values of direct and maternal calving ease were derived based on cost-benefit analysis and gene flow methodology. Marginal returns from dystocia reduction in primiparous dams were -$43 per phenotypic standard deviation compared with $300 for production. For an average mate, numbers of ...

1992
Robert E. Marks

O pricing decisions—in which the choice variable is not dichotomous as in the simple Prisoner’s Dilemma but continuous—have been modeled as a Generalized Prisoner’s Dilemma (GPD) by Fader and Hauser, who sought, in the two MIT Computer Strategy Tournaments, to obtain an effective generalization of Rapoport’s Tit for Tat for the threeperson repeated game. Holland’s genetic algorithm and Axelrod’...

The development of genomic selection has created new strategies in animal breeding programs. The aim of this study was to investigate the efficiency of genomic selection in breeding programs of native hens. In this study, a reference scenario with 3380 birds using pedigree and phenotypic information was simulated and the expected genetic progress was derived deterministically with the software ...

Journal: :Wetlands 2021

In the context of coastal marshland reduction due to sea level rise, we evaluated value fragmented reed beds located within agricultural polders for conservation habitats exploited by passerines characterized different ecological requirements. Although our study was carried out sites sampled over years, analyses body condition and diet birds during breeding period, as well local daily survival ...

Journal: :Sugar Tech 2021

Abstract Sugarcane breeding programs aim to deliver new high-yielding varieties, resistant diseases and pests, which contribute profitability sustainability of cane industries. These generally mobilize significant experimental, technological human resources on long-term basis. Their efficiency in terms genetic gains per unit cost time their ability release varieties rely the development many ap...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده ادبیات و علوم انسانی 1391

the present study aimed at exploring cognitions of iranian english teachers within the context of english for academic purposes (eap). to this end, the cognitions of two groups of eap teachers with respect to their pedagogical content knowledge (pck) and their sense of professional identity (pi) were probed. two language teachers and two content instructors who had at least five years of eap te...

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