Catch composition of the tsetse Glossina pallidipes Austen in revolving and stationary traps with respect to age, sex ratio and hunger stage

Owaga, Mary L. A.; Challier, Albert

doi:10.1017/s1742758400002952

Cited by 8 publications

(11 citation statements)

References 6 publications

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“…This bias stems from a differential capture probability of individuals of various ages and results in samples that may not reflect the actual age-structure of a wild population. The few previous studies that examined age-dependent trap biases concerned insects of medical and veterinary importance for which age estimation techniques are available (Owaga & Challier, 1985; Van Sickle & Phelps, 1988; Wall et al, 1991). In most other insect species, the ages of adults cannot be differentiated and, as a result, the study of age-dependent bias and other aspects of insect biology that depend on age have not advanced.…”

Section: Discussionmentioning

confidence: 99%

“…Despite the enormous amount of resources that has been invested in evaluating various insect trapping techniques and despite the importance of interpreting trap capture, it is remarkable that the entomological literature contains only a handful of studies that acknowledge or investigate potential age-dependent trap bias (e.g., Owaga & Challier, 1985; Van Sickle & Phelps, 1988; Wall et al, 1991), none of which concerns phytophagous insects. Researchers often assume that the probability of capturing insects is independent of age.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Life table assay of field‐caught Mediterranean fruit flies, Ceratitis capitata, reveals age bias

Kouloussis

Papadopoulos

Müller

et al. 2009

Entomologia Exp Applicata

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Though traps are used widely to sample phytophagous insects for research or management purposes, and recently in aging research, possible bias stemming from differential response of individuals of various ages to traps has never been examined. In this paper, we tested the response of Ceratitis capitata (Wiedemann) (Diptera: Tephritidae) males and females of four ages (spanning from 1 to 40 days) to McPhail-type traps baited with a synthetic food attractant in field cages and found that the probability of trapping was significantly influenced by age. The type of food on which flies were maintained before testing (sugar or protein) also had a strong effect and interacted with age. In another experiment, we collected wild C. capitata adults of unknown age using 1–3 methods and then reared them in the laboratory until death. The survival schedules of these flies were subsequently used in a life table assay to infer their age at the time of capture. Results showed that on a single sampling date, males captured in traps baited with a food attractant were younger compared with males aspirated from fruiting host trees, or males captured in traps baited with a sex attractant. Likewise, females captured in food-baited traps were younger compared with aspirated females. In addition to providing the first evidence of age-dependent sampling bias for a phytophagous insect species, this paper also provides a novel approach to estimate the differences in the age composition of samples collected with different techniques. These findings are of utmost importance for several categories of insects, medically important groups notwithstanding.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Life table assay of field‐caught Mediterranean fruit flies, Ceratitis capitata, reveals age bias

Kouloussis

Papadopoulos

Müller

et al. 2009

Entomologia Exp Applicata

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show abstract

“…The existence of a specific phase of peak mating activity early on in the hunger cycle was supported by the finding that male G.rnorsitans following moving men or a moving ox with men in the field were relatively replete (Ford, 1969). Also, samples of G.pallidipes collected using biconical traps with stationary and revolving attachments were found to consist of larger proportions of males and almost no old females when making faster revolutions (Owaga & Challier, 1985). A greater proportion of the males that visited the traps with revolving screens were recently fed and it was suggested that they were probably mate-seeking.…”

Section: Nutritional Correlates Of Mating Activitymentioning

confidence: 98%

The mating behaviour of tsetse flies (Glossina): a review

Wall

Langley

1993

Physiological Entomology

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Abstract. The mode of reproduction of tsetse flies, by adenotrophic viviparity, is unusual among the Diptera and is associated with many unique aspects of the tsetse's mating system. Tsetse exist at relatively low densities in the environment but a combination of olfactory and visual stimuli brings males and virgin females together on or around host animals. The behavioural repertoire associated with mate location and identification, courtship and copulation is regulated by external physical and chemical stimuli as well as by internal physiological mechanisms. With a view to identifying stimuli that could be used to manipulate tsetse behaviour and exploited for control purposes, much progress has been made in recent years in elucidating the mating behaviour of tsetse and its regulatory mechanisms. This progress and the current state of understanding of tsetse mating behaviour is reviewed.

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“…The results show that mating strikes by males are in all probability visually mediated, and that movement of a male past a stationary decoy can act as an adequate cue for attraction. There is some prospect, therefore, that decoys could be used as visual stimuli in conjunction with control devices, particularly sterilizing traps or targets (Langley & Weidhaas, 1986;Hall & Langley, 1987), to attract relatively well-fed, mate-orientated males (Owaga & Challier, 1985;Wall, 1988b). The addition of tsetse sex-pheromone to these decoys would not be expected to improve their attractiveness.…”

Section: Discussionmentioning

confidence: 99%

“…Traps and targets used to control tsetse fly (Takken et al, 1986;Vale et al, 1986) appear to attract tsetse in a variety of hunger states, though they tend to catch mainly hungry individuals (Bursell, 1961;Vale, 1974;Owaga & Challier, 1985), presumably by exploiting a hunger/feeding response. Relatively well fed males do not enter traps, but remain in their vicinity (Owaga & Challier, 1985) probably to attempt to intercept and mate with incoming females, as they do around host animals (Bursell, 1961;Vale, 1974). The stimuli which attract and initiate mating responses from male flies therefore may also be valuable tools through which the behaviour of a portion of the popula-Correspondence: Dr R. Wall tion, at present unavailable to conventional trap and target control systems, may be manipulated to improve efficiency.…”

Section: Introductionmentioning

confidence: 99%

The roles of vision and olfaction in mate location by males of the tsetse fly Glossina morsitans morsitans

Wall¹

1989

Medical Vet Entomology

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The roles of visual and/or olfactory stimuli in eliciting mating responses from male Glossina morsitans morsitans Westwood were examined, using a system for automatically recording the number and duration of mating strikes made towards decoys, under controlled conditions. The results confirm that there is no olfactory component of the female sex recognition pheromone sensed by the male antennae, and the attraction of males to females appears to be visual. The absence of male-male mating strikes was the result of the absence of female sex-pheromone, rather than the presence of a repellent mating deterrent in the male cuticle. Experiments with coloured, artificial, sex-pheromone-dosed, cotton decoys showed that colour had only weak effects on attractiveness and number of encounters with decoys, and that no colour caused significant enhancement of mating responses over those shown to decoy females.

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Catch composition of the tsetse Glossina pallidipes Austen in revolving and stationary traps with respect to age, sex ratio and hunger stage

Cited by 8 publications

References 6 publications

Life table assay of field‐caught Mediterranean fruit flies, Ceratitis capitata, reveals age bias

Life table assay of field‐caught Mediterranean fruit flies, Ceratitis capitata, reveals age bias

The mating behaviour of tsetse flies (Glossina): a review

The roles of vision and olfaction in mate location by males of the tsetse fly Glossina morsitans morsitans

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