Peptide and protein pheromones in molluscs

Susswein, Abraham J.; Nagle, Gregg T.

doi:10.1016/j.peptides.2003.11.027

Cited by 32 publications

(13 citation statements)

References 74 publications

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“…Odours mediate orientation in Tritonia intermittent motivation to find conspecifics. Other gastropods are known to use pheromones (Peters, 1964;Audesirk, 1977;Levy et al, 1997;Chase, 2002;Susswein and Nagle, 2004), and thus we hypothesize that T. diomedea releases a pheromone before and during mating to attract conspecifics.…”

Section: Rhinophores Are Necessary For Odour Based Navigationmentioning

confidence: 96%

Odours detected by rhinophores mediate orientation to flow in the nudibranch mollusc,Tritonia diomedea

Wyeth

Willows

2006

Journal of Experimental Biology

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SUMMARY Tritonia diomedea is a useful neuroethological model system that can contribute to our understanding of the neural control of navigation. Prior work on both sensory and locomotory systems is complemented by recent field experiments, which concluded that these animals primarily use a combination of odours and water flow as guidance cues. We corroborate these field results by showing similar navigation behaviours in a flow tank. Slugs crawled upstream towards both prey and conspecifics, and turned downstream after crawling into a section of the flow tank downstream of a predator. Controls without upstream odour sources crawled apparently randomly. We then tested whether these behaviours depend on odours detected by the rhinophores. Outflow from a header tank was used to generate prey, predator and unscented control odour plumes in the flow tank. Slugs with rhinophores crawled upstream towards a prey odour plume source, turned downstream in a predator odour plume, and showed no reaction to a control plume. Slugs without rhinophores behaved similarly to controls, regardless of odour plume type. Finally, we used extracellular recordings from the rhinophore nerve to demonstrate that isolated rhinophores are chemosensitive. Afferent activity increased significantly more after application of all three odour types than after unscented control applications. Responses were odour specific. We conclude that rhinophores mediate orientation to flow, and suggest that future work should focus on the integration of mechanosensation and chemosensation during navigation in T. diomedea.

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Section: Rhinophores Are Necessary For Odour Based Navigationmentioning

confidence: 96%

Odours detected by rhinophores mediate orientation to flow in the nudibranch mollusc,Tritonia diomedea

Wyeth

Willows

2006

Journal of Experimental Biology

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“…In Aplysia, the rhinophore epithelium was suggested to be chemoreceptive (Audesirk 1975;Emery and Audesirk 1978), and the function of the rhinophore as an olfactory organ was described by Audesirk and Audesirk (1977). Ablation of the rhinophores of Aplysia was shown to cause a decrease in the time spent for mating and the egg laying behaviour, suggesting the sensitivity of the rhinophores for pheromones (Levy et al 1997;Susswein and Nagle 2004;Cummins et al 2004). In a recent study using calcium-imaging techniques, Wertz et al (2006) showed that amino acids are detected and processed by the rhinophores of Aplysia punctata supporting their olfactory function.…”

Section: Introductionmentioning

confidence: 99%

Functional neuroanatomy of the rhinophore of Archidoris pseudoargus

et al. 2007

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For sea slugs, chemosensory information represents an important sensory modality, because optical and acoustical information are limited. In the present study, we focussed on the neuroanatomy of the rhinophores and processing of olfactory stimuli in the rhinophore ganglion of Archidoris pseudoargus, belonging to the order of Nudibranchia in the subclass of Opisthobranchia. Histological techniques, Xuorescent markers, and immunohistochemistry were used to analyse neuroanatomical features of the rhinophore. A large ganglion and a prominent central lymphatic channel are surrounded by longitudinal muscles. Many serotonin-immunoreactive (IR) processes were found around the centre and between the ganglion and the highly folded lobes of the rhinophore, but serotonin-IR cell bodies were absent inside the rhinophore. In contrast to the conditions recently found in Aplysia punctata, we found no evidence for the presence of olfactory glomeruli within the rhinophore. Using calcium-imaging techniques with Fura II as a calcium indicator, we found diVerential calcium responses in various regions within the ganglion to stimulation of the rhinophore with diVerent amino acids. The lack of glomeruli in the rhinophores induces functional questions about processing of chemical information in the rhinophore.

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“…Previously, Zatylny et al (2000) isolated a peptide from eggs of S. officinalis that stimulated contractions of the female genital tract. Although we do not know whether this compound is the same or related to the compound(s) that mediate VR rate and attraction in our study, it is likely that eggs contain a number of bioactive factors (Susswein and Nagle 2004) that stimulate different responses from cuttlefish.…”

Section: Resultsmentioning

confidence: 80%

“…Chemical attractants facilitate reproduction in many mollusks (Susswein and Nagle 2004), and cuttlefish are capable of chemoreception over a distance (Budelmann et al 1997). Here, we tested the hypothesis that Sepia officinalis eggs could provide a source of chemoattractants (Zatylny et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Sexually Mature Cuttlefish are Attracted to the Eggs of Conspecifics

et al. 2010

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Cuttlefish typically are solitary, but form aggregations to spawn. We tested the hypothesis that bioactive factors in the eggs of conspecifics may facilitate the formation of spawning groups of Sepia officinalis. Cuttlefish detected odors from cuttlefish eggs, resulting in an increased ventilation rate. Extracts from female ovaries induced the largest increase in ventilation rate, suggesting that this organ could be a potential source of the bioactive chemicals. In y-maze assays, sexually mature, but not subadult, cuttlefish, were attracted to odors of cuttlefish eggs. These data suggest that Sepia eggs could be a source of reproductive pheromones.

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Peptide and protein pheromones in molluscs

Cited by 32 publications

References 74 publications

Odours detected by rhinophores mediate orientation to flow in the nudibranch mollusc,Tritonia diomedea

Odours detected by rhinophores mediate orientation to flow in the nudibranch mollusc,Tritonia diomedea

Functional neuroanatomy of the rhinophore of Archidoris pseudoargus

Sexually Mature Cuttlefish are Attracted to the Eggs of Conspecifics

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