Document Detail


Food caching in orb-web spiders (Araneae: Araneoidea).
MedLine Citation:
PMID:  11261355     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Caching or storing surplus prey may reduce the risk of starvation during periods of food deprivation. While this behaviour occurs in a variety of birds and mammals, it is infrequent among invertebrates. However, golden orb-web spiders, Nephila edulis, incorporate a prey cache in their relatively permanent web, which they feed on during periods of food shortage. Heavier spiders significantly reduced weight loss if they were able to access a cache, but lost weight if the cache was removed. The presence or absence of stored prey had no effect on the weight loss of lighter spiders. Furthermore, N. edulis always attacked new prey, irrespective of the number of unprocessed prey in the web. In contrast, females of Argiope keyserlingi, who build a new web every day and do not cache prey, attacked fewer new prey items if some had already been caught. Thus, a necessary preadaptation to the evolution of prey caching in orb-web spiders may be a durable or permanent web, such as that constructed by Nephila.
Authors:
F E Champion de Crespigny; M E Herberstein; M A Elgar
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Die Naturwissenschaften     Volume:  88     ISSN:  0028-1042     ISO Abbreviation:  Naturwissenschaften     Publication Date:  2001 Jan 
Date Detail:
Created Date:  2001-03-22     Completed Date:  2001-04-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0400767     Medline TA:  Naturwissenschaften     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  42-5     Citation Subset:  IM    
Affiliation:
Department of Zoology, University of Melbourne, Victoria 3010, Australia.
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MeSH Terms
Descriptor/Qualifier:
Animals
Feeding Behavior
Female
Food Deprivation
Predatory Behavior*
Species Specificity
Spiders / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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