nieuwe zoekopdracht
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

The genetic effects of competition in seaweed flies
Leggett, M.C.; Wilcockson, R.W.; Day, T.H.; Phillips, D.S.; Arthur, W. (1996). The genetic effects of competition in seaweed flies. Biol. J. Linn. Soc. 57(1): 1-11. dx.doi.org/10.1111/j.1095-8312.1996.tb01692.x
In: Biological Journal of the Linnean Society. Academic Press: London; New York. ISSN 0024-4066; e-ISSN 1095-8312, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoorden
    Overleving; Coelopa (Fucomyia) frigida (Fabricius, 1805) [WoRMS]; Coelopa (Coelopa) pilipes Haliday, 1838 [WoRMS]; Marien
Author keywords
    Facilitation; differential survival

Auteurs  Top 
  • Leggett, M.C.
  • Wilcockson, R.W.
  • Day, T.H.
  • Phillips, D.S.
  • Arthur, W.

Abstract
    In spite of abundant evidence that intra- and inter-specific competition occurs in natural communities, there is surprisingly little to suggest it is a major force promoting genetic change. This report assesses the genetic effects of competition in two species of seaweed fly, Coelopa frigida and C. pilipes. In laboratory cultures of C. frigida the relative survival of heterozygotes at the Adh locus, which was being used as a marker for the large αβ chromosomal inversion, was greater than that of homozygotes. In monocultures of C. frigida this competitive superiority was dependent on larval density. At low densities facilitation was seen, whereas at high larval densities there was competition. In mixed cultures of the two species, interspecific competition contributed to the differential mortality of C. frigida, and observations of natural populations suggested that competition may have similar effects to those described in laboratory culture. A possible mechanism involving the supply of nutritive microorganisms is proposed to underly both intra- and inter-specific competition. In seaweed flies, competition and the consequent differential mortality appear to be forces maintaining rather than reducing genetic variation.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs 
IMIS is ontwikkeld en wordt gehost door het VLIZ, voor meer informatie contacteer .