Journal article

Can pathogens optimize both transmission and dispersal by exploiting sexual dimorphism in their hosts?

Louise Solveig Norgaard, Ben L Phillips, Matthew D Hall

BIOLOGY LETTERS | ROYAL SOC | Published : 2019

Abstract

Pathogens often rely on their host for dispersal. Yet, maximizing fitness via replication can cause damage to the host and an associated reduction in host movement, incurring a trade-off between transmission and dispersal. Here, we test the idea that pathogens might mitigate this trade-off between reproductive fitness and dispersal by taking advantage of sexual dimorphism in their host, tailoring responses separately to males and females. Using experimental populations of Daphnia magna and its bacterial pathogen Pasteuria ramosa as a test-case, we find evidence that this pathogen can use male hosts as a dispersal vector, and the larger females as high-quality resource patches for optimized p..

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University of Melbourne Researchers