title: Frequent misdirected courtship in a natural community of colorful Habronattus jumping spiders.
abstract: Male courtship display is common in many animals; in some cases, males engage in courtship indiscriminately, spending significant time and energy courting heterospecifics with whom they have no chance of mating or producing viable offspring. Due to high costs and few if any benefits, we might expect mechanisms to evolve to reduce such misdirected courtship (or 'reproductive interference'). In Habronattus jumping spiders, males frequently court heterospecifics with whom they do not mate or hybridize; females are larger and are voracious predators, posing a severe risk to males who court indiscriminately. In this study, we examined patterns of misdirected courtship in a natural community of four sympatric Habronattus species (H. clypeatus, H. hallani, H. hirsutus, and H. pyrrithrix). We used direct field observations to weigh support for two hypotheses (differential microhabitat use and species recognition signaling) to explain how these species reduce the costs associated with misdirected courtship. We show that, while the four species of Habronattus do show some differences in microhabitat use, all four species still overlap substantially, and in three of the four species individuals equally encountered heterospecifics and conspecifics. Males courted females at every opportunity, regardless of species, and in some cases, this led to aggression and predation by the female. These results suggest that, while differences in microhabitat use might reduce misdirected courtship to some extent, co-existence of these four species may be possible due to complex communication (i.e. species-specific elements of a male's courtship display). This study is the first to examine misdirected courtship in jumping spiders. Studies of misdirected courtship and its consequences in the field are limited and may broaden our understanding of how biodiversity is maintained within a community.
authors.affiliation: Entomology and Nematology Department, University of Florida, Gainesville, Florida, United States of America.|Florida Museum of Natural History, University of Florida, Gainesville, Florida, United States of America.|School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America.
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Taylor
authors.affiliation: Entomology and Nematology Department, University of Florida, Gainesville, Florida, United States of America.|School of Biological Sciences University of Auckland, Auckland, New Zealand.
authors.forename: Erin C
authors.identifier: http://orcid.org/0000-0002-2483-1883
authors.initials: EC
authors.lastname: Powell
authors.affiliation: School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America.
authors.forename: Kevin J
authors.initials: KJ
authors.lastname: McGraw
mesh_terms: D000374:Aggression / Q000502:physiology; D000818:Animals; D005075:Biological Evolution; D003116:Color; D003380:Courtship; D005260:Female; D008297:Male; D052586:Mating Preference, Animal / Q000502:physiology*; D012098:Reproduction / Q000235:genetics / Q000502:physiology; D012726:Sexual Behavior, Animal / Q000502:physiology*; D013045:Species Specificity; D013112:Spiders / Q000235:genetics*