Assessment of strength and willingness to fight during aggressive encounters in crickets

Hofmann, Hans A.; Schildberger, Klaus

doi:10.1006/anbe.2001.1746

Cited by 160 publications

(122 citation statements)

References 43 publications

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“…This proposition is supported by field data (Holzer et al 2003) and laboratory data (Scheuber et al 2003), which reveal carrier frequency and chirp rate to be uncorrelated calling-song characteristics. This also suggests that, although size asymmetry is an important factor determining resourceholding potential in field crickets (Alexander 1961;Hofmann & Schildberger 2001), variation in past condition does not affect variation in current condition. Summarizing, calling-song characteristics of field crickets do not merely contain redundant information on overall male quality, as predicted by the redundant signals hypothesis (Møller & Pomiankowski 1993;Johnstone 1996;Candolin Proc.…”

Section: Discussionmentioning

confidence: 91%

The effect of past condition on a multicomponent sexual signal

Scheuber

Jacot

Brinkhof

2003

Proc. R. Soc. Lond. B

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Sexual-selection theory predicts that multiple signals may reveal male condition at different stages of life, thus allowing females to make a more reliable assessment of male quality. While the effect of current condition on signal design is well established, few studies have experimentally investigated the effects of past condition. We therefore manipulated the nutritional condition of male nymph field crickets Gryllus campestris and assessed the enduring effects on multiple components of the adult calling song. Foodrestricted males had longer nymphal development times and smaller adult body sizes than nymphs with ad libitum food access. Nymphal feeding conditions specifically affected the allometric relationship between body size and harp size, as food-restricted males developed comparatively small harps, leading to a calling song of higher carrier frequency than that produced by similar-sized control males. Other calling-song components, notably chirp rate and chirp intensity, were not affected by the nymphal food treatment, exposing carrier frequency as the key component indicating past condition. In a previous study we established chirp rate as the sole indicator of current condition. The combined results represent experimental evidence of a multicomponent sexual signal that provides distinct information on male condition during different stages of life.

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Section: Discussionmentioning

confidence: 91%

The effect of past condition on a multicomponent sexual signal

Scheuber

Jacot

Brinkhof

2003

Proc. R. Soc. Lond. B

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“…This result rests on the assumption that males can detect their chances of winning a fight by evaluating the situation or the competitor. Such an ability of competing males has been shown in various animal species from insects to mammals (Davies & Halliday 1978;Clutton-Brock & Albon 1979;Panhuis & Wilkinson 1999;Schuck-Paim 2000;Hofmann & Schildberger 2001). I therefore suppose that it is likely that at least a behavioural programme such as 'attack if you surprise your rival' or 'attack if bigger' evolves that leads to attacks only when a certain fighting threshold is exceeded.…”

Section: Discussionmentioning

confidence: 97%

Influence of male relatedness on lethal combat in fig wasps: a theoretical analysis

Reinhold

2003

Proc. R. Soc. Lond. B

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In many fig wasp species, flightless males fatally fight with rivals. In a recent comparative analysis, West and colleagues found no influence of male relatedness on the frequency of fatal fighting. Inspired by this study, I used a simple theoretical model to examine the conditions that should influence the probability of fatal fighting in a closed mating system. I show that, without kin recognition, relatedness can be expected to have no influence on the frequency of fatal fighting. Under such conditions, males should fight if their chance of winning is greater than a threshold determined by the number of competitors. If males recognize kin, a non-linear relationship between relatedness and the frequency of fatal fighting can be expected. However, two other factors should also be important when there is kin recognition: male number and variance in male fighting strength can be shown to have decisive influences on the frequency of fatal fighting. My results thus corroborate and explain one finding of the empirical study-that there is no significant influence of relatedness on fatal fighting-but point to a role for other factors besides foundress number-male number and male variance in fighting strength. These are probably important factors determining the occurrence of lethal combat in fig wasps.

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“…Although the behavior strength had been applied to assess the effects of environment stressor on the behavior of some organisms [5,14], there was not a precise concept yet. In this study, behavior strength is defined as the intensity of behavior parameters representing motility.…”

Section: Methodsmentioning

confidence: 99%

The Avoidance Responses of Daphnia magna to the Exposure of Organophosphorus Pesticides in an On-Line Biomonitoring System

Ren

Zha

et al. 2008

Environ Model Assess

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In this study, avoidance behavior of the freshwater cladoceran Daphnia magna Straus was used as indicator to assess the early stress of accidental organophosphorus pesticide (OP) contamination. The movement behavior was detected by a multi-species biomonitoring system. There was obvious concentration-response relationship between the OP stress and the behavioral response even at sublethal exposure. A rising OP stress resulted in a significant decrease of response time to escape (RTE; p<0.05). In comparison of different OPs, it was found that there was a power regression between RTE and the toxic unit of OPs. Therefore, the avoidance behavior of D. magna was a sensitive indicator of sublethal OP stress, and the power relationship could be used to predict the early warning thresholds of more OPs in the on-line biomonitoring system.

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Assessment of strength and willingness to fight during aggressive encounters in crickets

Cited by 160 publications

References 43 publications

The effect of past condition on a multicomponent sexual signal

The effect of past condition on a multicomponent sexual signal

Influence of male relatedness on lethal combat in fig wasps: a theoretical analysis

The Avoidance Responses of Daphnia magna to the Exposure of Organophosphorus Pesticides in an On-Line Biomonitoring System

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