Androgen increases olfactory receptor response to a vertebrate sex pheromone

Cardwell, J. R.; Stacey, N. E.; Lang, Shelley L. C.; Tan, Eddy S.P.; McAdam, D. Steven O.

doi:10.1007/bf00197752

Cited by 92 publications

(55 citation statements)

References 37 publications

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“…The androgen treated males paid more attention to the female compared with the castrated controls. Implantation and injection experiments with various fish species of different taxonomic groups have revealed that male prespawning behaviour is in some species dependent of gonadal androgens (Liley & Stacey 1983;Borg 1987) and in a cyprinid fish (Puntius schwanenfeldi) androgen treatment of males increased their olfactory sensitivity to the putative hormone pheromone 15-keto-prostaglandin-F 2h (Cardwell et al 1995). No such relationships have yet been shown in salmonids.…”

Section: Discussionmentioning

confidence: 99%

Spawning behaviour and sex hormone levels in adult and precocious brown trout (Salmo trutta L.) males and the effect of anosmia

et al. 1998

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In the present experiment the behaviour and endocrine status of males of the brown trout, Salmo trutta L., (Salmoniformes: Salmonidae) were studied when males were kept in a stream tank with a nest digging female. Groups of mature adult males and precocious intact or anosmic male parr were placed with the nesting female so that the group resembled a natural spawning situation with big anadromous fish acting as dominant males and precocious parr acting as ''sneakers''. A control experiment was also run with only males without a female present. In intact parr there were significant positive correlations between the per cent of the total observation time spent with a female, milt volume, and plasma concentration of 17h,20i-dihydroxy-4-pregnen-3-one. Anosmic parr had significantly lower volumes of strippable milt and gonadal steroid hormone levels compared with intact parr. However, no differences were found in the control experiment. Significantly fewer anosmic parr attended and courted the nesting female and those anosmic fish that attended the female had significantly lower plasma levels of gonadal hormones. Intact parr also displayed a greater number of agonistic acts against other parr without any difference in fighting ability. No differences in aggression occured in the control experiment. In adult males together with a female, post-experimental gonadal steroid hormone levels were higher than pre-experimental levels. Positive correlations between aggression and androgen hormone levels were observed in adult males. No differences in plasma hormone levels were observed between adult males and intact precocious males. The results show that olfactory occlusion results in low steroid hormone levels and milt volumes in precocious males placed in a spawning situation. The courting behaviour was also affected by anosmia. Odours from the nesting female may have caused the enhanced plasma hormone levels and stimulated the males to attend the female.

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Section: Discussionmentioning

confidence: 99%

Spawning behaviour and sex hormone levels in adult and precocious brown trout (Salmo trutta L.) males and the effect of anosmia

et al. 1998

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“…In two fish species, hormonal status influences male sensitivity to female-produced sex pheromones. Adult male Puntius schwanenfeldi increase peripheral nervous system sensitivity to pheromone with increased androgen titer (Cardwell et al, 1995) whereas endocrine effects on the central nervous system mediate pheromone responsiveness in the goldfish Carassius auratus (Sorensen et al, 1987). Male hamsters respond to sex pheromone only if a threshold level of testosterone occurs in the brain (Wood and Swann, 2000).…”

Section: Introductionmentioning

confidence: 99%

Peripheral and behavioral plasticity of pheromone response and its hormonal control in a long-lived moth

Lemmen

Evenden

2009

Journal of Experimental Biology

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SUMMARYReproductive success in many animals depends on the efficient production of and response to sexual signals. In insects, plasticity in sexual communication is predicted in species that experience periods of reproductive inactivity when environmental conditions are unsuitable for reproduction. Here, we study a long-lived moth Caloptilia fraxinella (Ely) (Lepidoptera: Gracillariidae) that is reproductively inactive from eclosion in summer until the following spring. Male sex pheromone responsiveness is plastic and corresponds with female receptivity. Pheromone response plasticity has not been studied in a moth with an extended period of reproductive inactivity. In this study, we ask whether male antennal response and flight behavior are plastic during different stages of reproductive inactivity and whether these responses are regulated by juvenile hormone. Antennal response to the pheromone blend is significantly reduced in reproductively inactive males tested in the summer and autumn as compared with reproductively active males tested in the spring. Reproductively inactive autumn but not summer males show lower antennal responses to individual pheromone components compared with spring males. Treatment with methoprene enhances antennal response of autumn but not summer males to high doses of the pheromone blend. Behavioral response is induced by methoprene treatment in males treated in the autumn but not in the summer. Plasticity of pheromone response in C. fraxinella is regulated, at least in part, by the peripheral nervous system. Antennal and behavioral response to pheromone differed in reproductively active and inactive males and increased with methoprene treatment of inactive males.

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“…mature males have higher sensitivity to (a) component(s) in female urine than females themselves. Thus, the process of sexual maturation may influence the expression of olfactory receptor genes in the olfactory epithelium in the sole, as has been shown in the eel (Churcher et al, 2015), and in cyprinids, olfactory sensitivity is increased by androgens (Belanger et al, 2010;Cardwell et al, 1995;Ghosal and Sorensen, 2016). It is likely, therefore, that during sexual maturation, increased circulating sex steroids evoke a differential expression of pheromone receptors in the olfactory epithelium.…”

Section: Discussionmentioning

confidence: 88%

Olfactory sensitivity of the marine flatfishSolea senegalensisto conspecific body fluids

Fatsini

Carazo

Chauvigné

et al. 2017

Journal of Experimental Biology

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Chemical communication is better understood in freshwater fish than marine fish. The Senegalese sole (Solea senegalensis) is a marine flatfish wherein one of the problems in aquaculture is the poor reproductive performance of hatchery-bred males. Is chemical communication involved in the reproduction of this species? Urine, intestinal fluid and mucus samples were taken from adult fish (wildcaught and hatchery-bred) over the spawning season (March-May), and assessed for olfactory potency using the electro-olfactogram (EOG). The effect of stimulation of the olfactory system with adult female urine on circulating luteinizing hormone (LH) levels was also tested in males. Intestinal fluid and urine were potent olfactory stimuli for both juvenile and adult conspecifics, evoking large-amplitude, concentration-dependent EOG responses, with thresholds of detection at approximately 1:10 6 . However, the amplitude of the response to urine depended on the sex and state of maturity of both the donor and the receiver. Most olfactory activity could be extracted by C18 solid-phase cartridges. Urine from mature females evoked a slight, but significant, increase in circulating LH levels in mature males 30 min after exposure. Furthermore, the olfactory potency of urine differed between wild-caught and hatchery-bred fish; however, contrary to expectations, urine from wild-caught females was less potent than that from hatchery-bred females. Taken together, these results strongly suggest that faeces-and urine-released odorants are involved in reproduction in the Senegalese sole, and establish a basis for further investigation into pheromonal communication in marine teleosts.

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Androgen increases olfactory receptor response to a vertebrate sex pheromone

Cited by 92 publications

References 37 publications

Spawning behaviour and sex hormone levels in adult and precocious brown trout (Salmo trutta L.) males and the effect of anosmia

Spawning behaviour and sex hormone levels in adult and precocious brown trout (Salmo trutta L.) males and the effect of anosmia

Peripheral and behavioral plasticity of pheromone response and its hormonal control in a long-lived moth

Olfactory sensitivity of the marine flatfishSolea senegalensisto conspecific body fluids

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