Aggressive contests in male jumping spiders

The visual signals consisted of extending forelegs horizontally and waving them vertically. It is proposed that the observed among-male variations i.

UV-Green Iridescence Predicts Male Quality during Jumping Spider Contests

Journal of Insect Physiology. The effect of substrate on the efficacy of seismic courtship signal transmission in the jumping spider Habronattus dossenus Araneae: Females have slightly larger abdomens than males.

Differences in morphological and colour traits between initiators and non-initiators. In the later stages of courtship, the male repeatedly moved toward and away from the female; during each sequence, he extended his first pair of legs forward while attempting to contact the female Elias et al.

We ask whether conflicts between age- and size-controlled adult males are resolved by self- or mutual assessment [26] using separate multiple regression analyses, and if the iridescent colour traits relates to individual RHP.

Resonating feathers produce courtship song. Only abdomen total brightness exhibited a positive correlation with body mass. Phidippus clarus is a member of this group that routinely engages in highly aggressive acts toward conspecifics. The female rejects the male by extending her first pair of legs whenever he approaches too closely, or shows acceptance by not blocking his advance.

Here we investigated the assessment strategies used by Servaea incana jumping spiders to resolve male—male contests. Because of its common features and color, they can easily be confused with other spiders.

Journal of Experimental Biology. We took advantage of this potential effect of latency to molt on resource valuation to test whether weight asymmetries RHPlatency to molt asymmetries RPVor residency asymmetries intruder vs.

Of recent interest to optical and behavioural scientists is a kind of structural coloration known as animal reflectors [2] or iridescence. During our trials, males vibrated while approaching females. Using statistical methodology that allows discrimination between assessment types, we examined contests in the jumping spider Phiddipus clarus.

The largest males are the most aggressive and thus the largest males and females mate, and so on in order of size. Moreover, it is not known whether females discriminate among potential mates based on variation in these signals. In other cases, the signals used in male—male competition differ from those used to attract females.

Precontact and contact phase durations were reduced while vibratory signalling behaviour in winners was unchanged. Substrate-borne courtship signals are important for male mating success, Ethology Experience affects the outcome of agonistic contests without affecting the selective advantage of size.

These signals were produced simultaneously with vibratory signals produced by abdominal tremulations Elias et al. To gain insight into assessment strategy, we considered duration and escalation as measures of cost accrual.

For each focal individual, we noted weight asymmetry focal weight — competitor weightmolt asymmetry focal latency to molt — competitor latency to moltand residency status resident vs. Some females were polyandrous; however, copulation with mated females occurred after longer courtship durations, and courtship duration was positively correlated with male size, demonstrating that mated females are less receptive to mates and suggesting that females may be trading up in subsequent matings.

Hobo spiders prefer dark, damp hiding places and often make garages and basements their homes. However, a recent argument highlighted that many contests are possibly resolved by self assessments i.

Hobo Spiders

Animal Behavior, 75 2 The turn exposes her genital pore, which lies on the underside of the abdomen, and the male inserts one semen-laden pedipalp. Although many people believe otherwise, these spiders only bite when provoked or threatened, and are not aggressive.

All procedures for the trials with mated females were the same as for the trials with virgin females. After initial contest bouts, male competitors changed their behaviour. Although cannibalism is likely to prevent mass rearing of P. In these females, copulations after the first occur after longer courtships.

Seismic signals in a courting male jumping spider Araneae: We excluded the period of visual i. Movie on contest escalation of Cosmophasis umbratica males.Using statistical methodology that allows discrimination between assessment types, we examined contests in the jumping spider Phiddipus clarus.

In this species, aggressive interactions can be divided into ‘pre-contact’ and ‘contact’ phases. Video playback experiments support a role for visual assessment of opponent size in male-male contests of Servaea incana jumping spiders.

The male jumping spiders used multimodal signals during aggressive interactions: visual and substrate-borne. Substrate-borne vibrations appeared to be of particular importance, given that the number of vibratory signals accurately predicted the contest outcome.

Jumping spiders have been used in several studies examining male contests (Pollard et al. ; Wells ; Faber & Baylis ; Taylor et al. ; Cross et al.; Hoefler ).

When two males meet, they usually enter into stereotyped displays consisting of visual and tactile signals (Pollard et al. ; Taylor et al.

). Jumping spiders have been the focus of several recent studies on male–male aggression (Jackson ; Wells ; Jackson and McNab ; Faber and Baylis ; Clark et al. ; Taylor and Jackson ; Taylor et al.; Cross et al. ; Jackson et al. ; Cross et al.

; Hoefler ; Elias et al. ; Kasumovic et al. b;. In male jumping spiders Phidippus clarus, the number of vibratory signals is a reliable predictor for the outcome of contests (Elias et al., ).

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Aggressive contests in male jumping spiders
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