Sexual signaling and immune function in the black field cricket Teleogryllus commodus

Date

2012-07-09

Authors

Drayton, Jean M.
Hall, Matthew D.
Hunt, John
Jennions, Michael D.

Journal Title

Journal ISSN

Volume Title

Publisher

Public Library of Science

Abstract

The immunocompetence handicap hypothesis predicts that male sexual trait expression should be positively correlated with immunocompetence. Here we investigate if immune function in the cricket, Teleogryllus commodus, is related to specific individual components of male sexual signals, as well as to certain multivariate combinations of these components that females most strongly prefer. Male T. commodus produce both advertisement and courtship calls prior to mating. We measured fine-scale structural parameters of both call types and also recorded nightly advertisement calling effort. We then measured two standard indices of immune function: lysozyme-like activity of the haemolymph and haemocyte counts. We found a weak, positive relationship between advertisement calling effort and lysozyme-like activity. There was, however, little evidence that individual structural call components or the net multivariate attractiveness of either call type signalled immune function. The relationships between immunity and sexual signaling did not differ between inbred and outbred males. Our data suggest that it is unlikely that females assess overall male immune function using male calls.

Description

Keywords

animals, cell count, courtship, female, gryllidae, hemocytes, hemolymph, immunity, inbreeding, male, mating preference, animal, muramidase, phenotype, reproduction, selection, genetic, animal communication, immunocompetence

Citation

Source

PLoS ONE

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1371/journal.pone.0039631

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