Differential parasitism of native and invasive widow spider egg sacs

Monica Mowery, Valeria Arabesky, Yael Lubin & Michal Segoli
During colonization, invasive species establish and spread to new locations, where they may have an advantage over native species. One such advantage may be avoidance of predators or parasites by means of better defences or due to lower suitability as a host. We conducted field surveys and lab behavioural experiments to investigate the differential susceptibility of two widow spider species—one native to Israel, the white widow spider Latrodectus pallidus, and one invasive species, the brown...
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