SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Maher H.) ;conttype:(scientificother)"

Sökning: WFRF:(Maher H.) > Övrigt vetenskapligt/konstnärligt

  • Resultat 1-4 av 4
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  •  
2.
  • Asal, Maher, 1957-, et al. (författare)
  • The Application of Equity Index Futures in Portfolio Management Strategies : An Empirical Study
  • 2007
  • Bok (övrigt vetenskapligt/konstnärligt)abstract
    • The purpose of this book is to analyse how investors can reduce the systematic risk of a portfolio of stocks by using equity index futures, and how the leverage effect of futures can help to seize a market opportunity to lift a portfolio's return. Another contribution is to introduce the reader to the practical handling of equity index futures transactions using Eurex's products.
  •  
3.
  • D'Urban Jackson, J., et al. (författare)
  • Polygamy slows down diversification in shorebirds
  • 2017
  • Ingår i: ASAB Winter Meeting 2017 (Abstract), December 7-8, Londont, UK..
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
    • Here we introduce a novel hypothesis concerning the role of sexual selection in speciation. As an alternative to sexual selection leading to reproductive isolation, the “dispersal to mate” hypothesis predicts that sexual selection pressure may act to slow speciation since polygamous individuals can access additional mates by increased breeding dispersal. High breeding dispersal should hence increase gene flow and reduce diversification in polygamous species (i.e. species under elevated sexual selection pressure). Here we test this hypothesis to assess how polygamy affects population divergence in shorebirds using genetic differentiation and subspecies richness as proxies for diversification. Across 79 populations of ten plover species (genus: Charadrius), in addition to subspecies data from 136 shorebird species, our results suggest that dispersal associated with polygamy may facilitate gene flow and limit population divergence. Therefore, intense sexual selection, as occurring in polygamous species, may act rather as a brake than an engine of speciation in shorebirds. We encourage future research to further investigate this hypothesis using theoretical, direct tracking and genetic approaches which will inevitably improve our understanding of the relationships between sexual selection, dispersal and diversification.
  •  
4.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-4 av 4

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy