Document Detail


Benefits of fidelity: does host specialization impact nematode parasite life history and fecundity?
MedLine Citation:
PMID:  23343907     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
SUMMARY The range of hosts used by a parasite is influenced by macro-evolutionary processes (host switching, host-parasite co-evolution), as well as 'encounter filters' and 'compatibility filters' at the micro-evolutionary level driven by host/parasite ecology and physiology. Host specialization is hypothesized to result in trade-offs with aspects of parasite life history (e.g. reproductive output), but these have not been well studied. We used previously published data to create models examining general relationships among host specificity and important aspects of life history and reproduction for nematodes parasitizing animals. Our results indicate no general trade-off between host specificity and the average pre-patent period (time to first reproduction), female size, egg size, or fecundity of these nematodes. However, female size was positively related to egg size, fecundity, and pre-patent period. Host compatibility may thus not be the primary determinant of specificity in these parasitic nematodes if there are few apparent trade-offs with reproduction, but rather, the encounter opportunities for new host species at the micro-evolutionary level, and other processes at the macro-evolutionary level (i.e. phylogeny). Because host specificity is recognized as a key factor determining the spread of parasitic diseases understanding factors limiting host use are essential to predict future changes in parasite range and occurrence.
Authors:
J Koprivnikar; H S Randhawa
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-24
Journal Detail:
Title:  Parasitology     Volume:  -     ISSN:  1469-8161     ISO Abbreviation:  Parasitology     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401121     Medline TA:  Parasitology     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1-11     Citation Subset:  -    
Affiliation:
Department of Biology, Brandon University, 270 18th Street, Brandon, Manitoba, Canada R7A 6A9.
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