Allatectomy and sexual receptivity in females of Schistocerca gregaria

Strong, L.; Amerasinghe, F.P.

doi:10.1016/0022-1910(77)90118-4

Cited by 31 publications

(46 citation statements)

References 13 publications

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“…Allatectomy-induced persistence of 'primary defence', well known from females of some but not all acridid species (cf. Loher & Huber, 1966;Hartmann et al, 1972;Strong & Amerasinghe, 1977;review by Pener, 1986), has not yet been demonstrated in females of any cricket species.…”

Section: Eflects Of Fhe Ca On Sexua[ Receptivitylsexual Hrhaviour Ofmentioning

confidence: 99%

Effects of the corpora allata on sexual receptivity and completion of oocyte development in females of the cricket, Gryllus bimaculatus

Orshan

Pener

1991

Physiological Entomology

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Allatectomy of young penultimate nymphs of Gryllus bimaculatus De Geer (Gryllidae) resulted in prothetelic creatures which exhibited reproductive competence. The same operation performed on young last instar nymphs resulted in moulting to morphologically normal adults. Allatectomized morphologically normal adult females, as well as prothetelic ones, showed the same level of sexual receptivity as untreated control females. Allatectomized morphologically normal and prothetelic females laid viable eggs, but rate of egg laying and number of eggs produced by these females were much reduced in comparison with the controls. Administration of methoprene (a Juvenile Hormone analogue) to allatectomized females restored egg production to a more or less normal rate. Removal of the spermatophore within 10 min of copulation had no effect on subsequent sexual receptivity of the females, nor on the reduced rate of egg laying by the allatectomized females, but did affect the rate of egg laying by control females. It is suggested that the corpora allata (CA) and the Juvenile Hormone (JH) play no major role in controlling basic sexual receptivity of G.bimaculatus females, and do not have an all‐encompassing control on egg production, though they do exert a marked quantitative effect on the rate of egg production.

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Section: Eflects Of Fhe Ca On Sexua[ Receptivitylsexual Hrhaviour Ofmentioning

confidence: 99%

Effects of the corpora allata on sexual receptivity and completion of oocyte development in females of the cricket, Gryllus bimaculatus

Orshan

Pener

1991

Physiological Entomology

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“…In groups of locusts a long-range sex pheromone seems unnecessary, although a sexrecognition pheromone is evident. Females of Schistocerca gregaria are passive, displaying no calling behaviour, and appear to be forcibly copulated with by males (Norris, 1964;Amerasinghe 1978 b ;Strong & Amerasinghe, 1977). Males, however, seem to recognize females due to some contact sex pheromone.…”

Section: I Other Possible Pheromones a N D Se~iiocheslic;\i~smentioning

confidence: 99%

Pheromones and Chemical Ecology of Locusts

Byers

1991

Biological Reviews

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Summary Modern studies of chemical ecology and behaviour of the locusts Schistocerca gregaria and Locusta migratoria in the laboratory need to be more closely coupled with field experiments and observations. The life history relating to oviposition, transformation to gregarious phases, and adult maturation mediated by pheromones is reviewed. The principles of pheromone isolation and identification are discussed. The long‐term effects of the gregarization pheromone on the physiology are presented, with discussion of morphological changes, chiasma frequency increases, and synchronization of moulting induced by the pheromone. Isolation of the purported gregarization pheromone, locustol, from faeces is discussed in regard to inconsistent effects. Other more immediate effects of the pheromone on the social (gregarious) behaviour and the isolation of possible pheromone components different from but related to locustol are presented. It is stressed that more rigorous isolation studies should be undertaken to resolve conflicting reports and methodological problems. The possibility of an anti‐gregarization pheromone or solitarizing pheromone is discounted. The source and biosynthesis of locustol (or gregarization pheromone) from degradation of lignin by symbiotic bacteria is discussed. Theories of reception of the gregarization pheromone such as inhalation through the spiracles or sensory perception by the antennae are presented. Also an internal mechanism involving cAMP and/or corpora allata may be induced by gregarization pheromone to effect the physiological phase changes. The advantages to an individual of reception of the gregarization pheromone from a group of gregarious and pre‐migrating locusts is discussed. Also the possible benefits of gregarious behaviour, phase polymorphism and migration are dealt with. An adult (sexual) maturation pheromone has long‐term effects on reducing the period of maturation, and immediate effects on the behavioural vibration response. The epidermal source of the pheromone and glandular cells responsible for the production of the pheromone are discussed. The reception and internal mechanisms of response via the corpora allata are mentioned. The benefits to individuals of synchronized and rapid adult maturation in a gregarious group are considered. An oviposition‐stimulating pheromone produced by the male accessory reproductive glands appears to be a proteinaceous substance of large molecular weight. On the other hand, an oviposition‐aggregating pheromone volatilizes from epidermal areas of either sex and causes higher oviposition rates in the area of release. The behavioural and ecological aspects of this pheromone are discussed. Several other possible pheromones and semiochemicals are discussed, such as a long‐range sex pheromone, sex‐recognition pheromone, grass odours and feeding stimulants and deterrents. Several possible control strategies using locust pheromones are considered. The general conclusion is that the chemical isolation of the various pheromones is necessary before fur...

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“…1966). Sexual receptivity and oocyte development of the female locust, Shistocerca gregarza were inhibited by allatectomy (Strong & Amerasinghe, 1977). Little is known about the role of the corpora allata in the sexual development and behaviour of crickets.…”

Section: Introductionmentioning

confidence: 99%

Factors which influence female crickets' (Acheta domesticus) phonotactic and sexual responsiveness to males

Koudele

Stout

Reichert

1987

Physiological Entomology

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Removal of the corpora allata from sexually responsive Acheta domesticus females exhibiting direct, positive phonotaxis resulted in a decline of the directionality of phonotaxis and sexual responsiveness to males for the 3-day testing period. Phonotaxis and sexual responsiveness were restored to the level before allatectomy after topical treatment with J H 111. Sexually and phonotactically responsive females, given Precocene I or I1 showed no change in phonotactic orientation or sexual responsiveness. Females were isolated from males just prior to the imaginal moult. After 3 weeks of isolation (1-2.5 weeks following the imaginal moult) they showed significantly better phonotaxis to the calling song than did females that had been fully exposed to males, or those which had only olfactory exposure to males. There were no significant differences among the groups in their copulatory readiness when placed directly in contact with males. Mating caused a reduction in the phonotaxis of females. Females on the day of imaginal moult responded negatively to the calling song. This negative response disappeared on the day following the imaginal moult and did not re-appear in older females. Topical application of JH I11 or the synthetic analogue, ZR 515 caused females to become phonotactically positive in response to the calling song on the day of, or the day following the imaginal moult.

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Allatectomy and sexual receptivity in females of Schistocerca gregaria

Cited by 31 publications

References 13 publications

Effects of the corpora allata on sexual receptivity and completion of oocyte development in females of the cricket, Gryllus bimaculatus

Effects of the corpora allata on sexual receptivity and completion of oocyte development in females of the cricket, Gryllus bimaculatus

Pheromones and Chemical Ecology of Locusts

Factors which influence female crickets' (Acheta domesticus) phonotactic and sexual responsiveness to males

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