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Full-Text Articles in Life Sciences

Diet Influences Mate Choice Selectivity In Adult Female Wolf Spiders, Eileen Hebets, Jennifer Wesson, Paul S. Shamble Aug 2008

Diet Influences Mate Choice Selectivity In Adult Female Wolf Spiders, Eileen Hebets, Jennifer Wesson, Paul S. Shamble

Eileen Hebets Publications

Most studies of female choice have assumed that mating preferences are shared within a population or species. However, variation both within and among females exists in natural populations, and foraging history is among the many ways in which females may vary. Here, we used diet manipulations in an effort to understand how foraging history influences female mate choice. Immature Schizocosa wolf spiders collected from a mixed population of brush-legged and non-ornamented males were reared in the laboratory on two diets that varied in both quality and quantity (low/high diet). For low- and high-diet individuals, we recorded data on rates of …


Substrate-Dependent Signaling Success In The Wolf Spider, Schizocosa Retrorsa, Eileen Hebets, Damian O. Elias, Andrew C. Mason, Gary L. Miller, Gail E. Stratton Feb 2008

Substrate-Dependent Signaling Success In The Wolf Spider, Schizocosa Retrorsa, Eileen Hebets, Damian O. Elias, Andrew C. Mason, Gary L. Miller, Gail E. Stratton

Eileen Hebets Publications

Signals used in communication are often hypothesized to be optimally designed for their signaling environment. Here, we explore the importance of signaling substrate on seismic signal efficacy and reproductive behavior in the wolf spider, Schizocosa retrorsa: a species found on multiple signaling substrates (pine litter and/or red clay or sand). In this multimodal signaling species, simultaneous with conspicuous visual displays, males produce percussive seismic signals via an impulse mechanism which tends to excite a substrate evenly across a wide band of frequencies. We first quantified the transmission characteristics of this broadband percussive signal by playing recorded signals back across three …


Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets Jan 2008

Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets

Eileen Hebets Publications

Arthropod filiform hairs respond to air particle movements and are among the most sensitive animal sensory organs. In many species, they are tuned to detect predators or prey and trigger escape or prey capture behaviours. Here we show for the first time that these hairs also receive intraspecific near-field sound signals in an arachnid. During agonistic encounters, whip spiders (Arachnida, Amblypygi) perform antenniform leg vibration (ALV) displays that have significantly longer duration in contest winners than losers. During an ALV display: (i) the vibrating antenniform leg of the displaying whip spider is positioned close to the trichobothria (filiform hairs) on …


Supplementary Material: Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets Jan 2008

Supplementary Material: Agonistic Signals Received By An Arthropod Filiform Hair Allude To The Prevalence Of Near-Field Sound Communication, Roger D. Santer, Eileen Hebets

Eileen Hebets Publications

SUPPLEMENTARY METHODS
(i) Analysis of behaviour
(ii) Stimulator design

SUPPLEMENTARY RESULTS
(i) Typical contest behaviour
(ii) Additional data on ALV positioning relative to the receiver
(iii) Electrophysiological control experiments
(iv) Analysis of phase-locking

SUPPLEMENTARY REFERENCES

Includes 3 figures and 1 table.


Seismic Signal Dominance In The Multimodal Courtship Display Of The Wolf Spider Schizocosa Stridulans Stratton 1991, Eileen Hebets Jan 2008

Seismic Signal Dominance In The Multimodal Courtship Display Of The Wolf Spider Schizocosa Stridulans Stratton 1991, Eileen Hebets

Eileen Hebets Publications

Unraveling the function and evolutionary history of multimodal signaling is a difficult, yet common task of much research in animal communication. Here, I investigated multimodal signal function in the visual and seismic courtship display of the wolf spider Schizocosa stridulans and found that only the seismic courtship signal was important for mating success. First, copulation frequency was assessed in the presence/ absence of both visual and seismic courtship signals. The seismic signal was sufficient for successful copulation, whereas the visual signal was neither necessary nor sufficient, suggesting that the signals are not redundant and do not function as backups. Next, …