Publications by Year


Publications by Authors


Recent Publications

Contact Us

Department of Plant Pathology and Microbiology
The Robert H. Smith Faculty of Agriculture, Food & Environment
The Hebrew University of Jerusalem

Herzl 229
Rehovot 7610001 

Tel: 08-9489219
Fax: 08-9466794

Effects of the prey landscape on the fitness of the bacterial predators Bdellovibrio and like organisms


Sathyamoorthy, R. ; Huppert, A. ; Kadouri, D. E. ; Jurkevitch, E. Effects of the prey landscape on the fitness of the bacterial predators Bdellovibrio and like organisms. FEMS MICROBIOLOGY ECOLOGY 2021, 97.

Date Published:



Bdellovibrio and like organisms (BALOs) are obligate predatory bacteria commonly encountered in the environment. In dual predator-prey cultures, prey accessibility ensures optimal feeding and replication and rapid BALO population growth. However, the environmental prey landscape is complex, as it also incorporates non-prey cells and other particles. These may act as decoys, generating unproductive encounters which in turn may affect both predator and prey population dynamics. In this study, we hypothesized that increasing decoy:prey ratios would bring about increasing costs on the predator's reproductive fitness. We also tested the hypothesis that different BALOs and decoys would have different effects. To this end, we constructed prey landscapes including petiplasmic or epibiotic predators including two types of decoy under a large range of initial decoy:prey ratio, and mixed cultures containing multiple predators and prey. We show that as decoy:prey ratios increase, the maximal predator population sizes is reduced and the time to reach it significantly increases. We found that BALOs spent less time handling non-prey (including superinfection-immune invaded prey) than prey cells, and did not differentiate between efficient and less efficient prey. This may explain why in multiple predator and prey cultures, less preferred prey appear to act as decoy.