Nom du corpus

Corpus Systématique Animale

Titre du document

Evidence of exploitative competition among young stages of the wolf spider Schizocosa ocreata

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Exploitative competition
  • Density convergence
  • Field experiment
  • Wolf spider
  • Schizocosa ocreata
Nom du fichier dans la ressource
Arthropodes_v2b_00925
Auteur(s)
  • David H. Wise 1
  • James D. Wagner 1
Affiliation(s)
  • 1) Department of Biological Sciences, University of Maryland, Baltimore County Campus, 21228-5398, Baltimore, MD, USA
Résumé

Previous research by many investigators has demonstrated food limitation in both web-building and wandering spiders. Field experiments have tested for exploitative competition for prey in web-building, but not wandering species. As a first step to examining the question of whether spiders without webs exhibit exploitative competition, we manipulated densities of young stages of a common wolf spider, Schizocos ocreata, and measured (1) spider growth rate and (2) numbers of Collembola, a potential prey organism. Replicate populations of recently hatched S. ocreata were established in 1-m2 fenced plots at four levels: 0×, 0.25×, 1× and 4× natural density. Increasing spider density had a negative effect on spider growth rate, defined as increase in weight or cephalothorax width. Early in the experiment spider density had a weak negative effect on Collembola numbers [p(F)=0.08]. Taken together, this probable response by Collembola and the clear effect of spider density on growth rate constitute the first experimental evidence of intraspecific exploitative competition for prey in a species of wandering spider. We discuss (1) the strength of this evidence given the constraints of the experiment's design, and (2) the implications of the strong convergence in spider densities that had occurred after 2.5 months.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ethologie animale
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
642F43C1E2CE3BEFF74B54A9904FFFB2B31309B1
Revue

Oecologia

Année de publication
1992
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.376
Sous-corpus
  • Arthropodes
Type de publication
Journal
ark:/67375/1BB-2CK9HS1L-T
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