Sexual Behavior and Communication in the Desert Locust,
Schistocerca gregaria
(Orthoptera: Acrididae): Sex Pheromone in Solitaria

Inayatullah, C.; Bashir, S. El; Hassanali, Ahmed

doi:10.1093/ee/23.6.1544

Cited by 31 publications

(40 citation statements)

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“…In locusts and grasshoppers, visual, acoustic, chemical and tactile cues are used for mate finding and recognition (Whitman, 1990). In S. gregaria , acoustic signals are not important for the male response but visual stimuli play a role in finding females, although visual stimuli alone are not enough to induce sexual behaviour in males (Inayatullah et al , 1994; Ferenz & Seidelmann, 2003). S. gregaria uses sex pheromones for mate finding (Whitman, 1990; Byers, 1991; Ferenz & Seidelmann, 2003; Hassanali et al , 2005).…”

Section: Resultsmentioning

confidence: 99%

“…S. gregaria uses sex pheromones for mate finding (Whitman, 1990; Byers, 1991; Ferenz & Seidelmann, 2003; Hassanali et al , 2005). At a low density, solitarious females emit a sex pheromone to attract males, and the pheromone enhances the probability of the sexes meeting (Inayatullah et al , 1994). In the present study, gregarious males mounted the isolated‐reared gynandromorph almost immediately after the latter was introduced to the arena.…”

Section: Resultsmentioning

confidence: 99%

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Morphological and behavioural characteristics of a gynandromorph of the desert locust, Schistocerca gregaria

Maeno

Tanaka

2007

Physiological Entomology

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Morphological and behavioural characteristics are investigated for a gynandromorph of the desert locust, Schistocerca gregaria , appearing under isolated rearing conditions in the laboratory. It has both male and female external reproductive organs bilaterally. The body size and dimensions are similar to a normal male. Morphometric traits (fore wing length/maximum head width ratio and fore wing length/hind femur length ratio) of the gynandromorph are typical for the values of solitarious locusts. When the gynandromorph is placed into an arena holding ten sexually mature gregarious females, it shows a distinct male behaviour: it jumps on a female and tries to mate with her. When kept together with males, males recognize this gynandromorph as a female because some of them try to mount, although no successful copulation is observed. The results suggest that the gynandromorph might have had a femalespecific pheromone. Dissection reveals that the gynandromorph has no testis but abnormal ovaries containing vitellogenic oocytes. These observations indicate that the gynandromorph obtained has a mixture of male and female morphological characteristics and behaves like a male but is recognized as a female by conspecific males.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Morphological and behavioural characteristics of a gynandromorph of the desert locust, Schistocerca gregaria

Maeno

Tanaka

2007

Physiological Entomology

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“…Thus the chemical signals play active roles to trigger and control courtship in these species. In a housefly (Musca domestica), a desert locust (Schistocerca gregaria) and a yellow-spotted longicorn beetle (Psacothea hilaris) a combination of vision and pheromone reception was important for mate recognition and sexual attraction (Richter et al, 1976;Inayatullah et al, 1994;Fukaya and Honda 1996). UV may inhibit sensitivity to other signals such as the female sex pheromone in Drosophila males.…”

Section: Discussionmentioning

confidence: 99%

Light wavelength dependency of mating activity in the Drosophila melanogaster species subgroup.

et al. 2002

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The action spectra of mating activity among the six species of the Drosophila melanogaster species subgroup were compared to understand how light wavelength affects mating activity. The species fell into three groups with respect to the action spectrum of mating activity. We chose one representative species from each of the three types for detailed study: D. melanogaster , D. sechellia and D. yakuba . The mating activities were investigated under three different light intensities of three monochromatic lights stimulus. Each species showed a unique spectral and intensity response. To know the evolutionary meaning of the light wavelength dependency of mating activity, we superimposed the type of action spectrum of mating activity in these six species on a cladogram. Mating inhibition under UV was conserved in evolution among these species. Furthermore we clarified that D. melanogaster showed low mating activity under UV because males courted less under UV.

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“…These aspects have not been well investigated. Concerning short‐range communication (distances up to 100 cm), recent studies indicate that female volatiles may enhance the meeting of the sexes in sparse solitary field conditions (Inayatullah et al ., 1994). One of the adult female‐specific volatile components which evokes a significant EAG response in males is ( E,Z )‐2,6‐nonadienal (Torto et al ., 1995), which is also a minor component of the preferred host plant Tribulus terrestris (Ignell et al ., 2001).…”

Section: Sex Pheromonesmentioning

confidence: 99%

Pheromones in relation to aggregation and reproduction in desert locusts

Ferenz¹,

Seidelmann²

2003

Physiological Entomology

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Abstract. Desert locusts, Schistocerca gregaria (Forska˚l) (Orthoptera: Acrididae), exhibit a population density-dependent phase polymorphism which includes the gradual change of many morphological, physiological and behavioural characteristics. Many volatiles associated with desert locusts have been identified recently and it is assumed that they are involved in pheromonal control of behaviour and development of locusts. Ovipositing females deposit with their egg pods several volatiles that appear to be attractive to other females resulting -possibly in combination with environmental factors -in an aggregated oviposition. Mature males release several volatiles, among them phenylacetonitrile, which are reported to accelerate sexual maturation in young males. Also, aggregation pheromone systems for hoppers and adults have been described. However, recent studies and publications shed a new light on the postulated effects of some of these volatiles. Gregarious behaviour can undoubtedly be induced by mechanical stimuli. Furthermore, the main component of the adult aggregation pheromone system, phenylacetonitrile, is found to be a repellent obviously not involved in aggregation. Comprehensive studies have demonstrated that phenylacetonitrile is used by mature gregarious males as a courtship inhibition pheromone to enhance mate guarding. Recent progress, contradictory results and perspectives in desert locust pheromone research related to reproduction are summarized and discussed in this paper.

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Sexual Behavior and Communication in the Desert Locust, Schistocerca gregaria (Orthoptera: Acrididae): Sex Pheromone in Solitaria

Cited by 31 publications

References 0 publications

Morphological and behavioural characteristics of a gynandromorph of the desert locust, Schistocerca gregaria

Morphological and behavioural characteristics of a gynandromorph of the desert locust, Schistocerca gregaria

Light wavelength dependency of mating activity in the Drosophila melanogaster species subgroup.

Pheromones in relation to aggregation and reproduction in desert locusts

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