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Does frequency-dependence determine male morph survival in the bulb mite Rhizoglyphus robini?
MedLine Citation:
PMID:  24248909     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Alternative reproductive phenotypes (ARPs) represent discrete morphological variation within a single sex; as such ARPs are an excellent study system to investigate the maintenance of phenotypic variation. ARPs are traditionally modelled as a mixture of pure strategies or as a conditional strategy. Most male dimorphisms are controlled by a conditional strategy, where males develop into a particular phenotype as a result of their condition which allows them to reach a certain threshold. Individuals that are unable to reach the threshold of a conditional strategy are considered to 'make the best of a bad job'; however, these individuals can have their own fitness merits. Given these fitness merits, condition-dependent selection alone is not sufficient to maintain a conditionally determined male dimorphism and other mechanisms, most likely frequency-dependent selection, are required. We studied in an experiment, the male dimorphic bulb mite Rhizoglyphus robini-where males are fighters that can kill other males or benign scramblers-to assess the strength of frequency-dependent survival in a high and low-quality environment. We found that male survival was frequency-dependent in the high-quality environment but not the low-quality environment. In the high-quality environment the survival curves of the two morphs crossed but the direction of frequency-dependence was opposite to what theory predicts.
Authors:
Jacques A Deere; Isabel M Smallegange
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-11-19
Journal Detail:
Title:  Experimental & applied acarology     Volume:  -     ISSN:  1572-9702     ISO Abbreviation:  Exp. Appl. Acarol.     Publication Date:  2013 Nov 
Date Detail:
Created Date:  2013-11-19     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8507436     Medline TA:  Exp Appl Acarol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Zoology, University of Oxford, The Tinbergen Building, South Parks Road, Oxford, OX1 3PS, UK, jacques.deere@zoo.ox.ac.uk.
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