Behavioural and neuro-muscular features of food ingestion in<i>Aplysia</i>

Geppetti, L.; Mezzetti, M. C.; Costa, Giacomo; Parpagnoli, D.

doi:10.1080/08927014.1990.9525445

Cited by 2 publications

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“…Wide ribbon resulted in a smaller L parameter, while D parameter was nearly doubled (p < 0.05 and p < 0.01, respectively, Mann-Whitney U test applied to mean values obtained from different animals); a decrease in F may also be suggested, though in this case statistical significance was not met. It has been shown that latency to biting increases (Susswein and Kupfermann, 1975) and ingestion velocity decreases (Geppetti et al, 1990) in animals tested after a partial meal. The effect of this treatment on the three parameters chosen in this study was tested, with narrow ribbon ingestion.…”

Section: Parameter Evaluation For the Elementary Feeding Cyclesmentioning

confidence: 99%

“…It has also been represented in terms of electrical activity recorded from specific muscles or neurones (Susswein and Byrne, 1988; 68 LAURA GEPPETTI AND LORENZO FIORE Cropper etal., 1990;Plummer and Kirk, 1990;Rosen etal., 1991), or with the aid of transducers sensitive to buccal pressure or other physical factors (Chiel etal., 1986). One of the procedures involved recordings of the movements of a seaweed ribbon of fixed width during ingestion Bentivegna et al, 1988;Geppetti et al, 1990). …”

Section: Introductionmentioning

confidence: 99%

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Stability and modulation ofAplysiafeeding behaviour: A parametric study

Geppetti

Fiore

1993

Marine Behaviour and Physiology

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The ingestion of Ulva strips 10 cm long, 1 or 2 cm wide (narrow and wide ribbon) was automatically recorded and analysed in Aplysia depilans. Graphs expressing ribbon displacements as a function of time were obtained. They showed a sequence of alternate slow and fast movements (slow and fast "phase"). The duration of a slow phase was positively correlated with the fast phase following it, but not with the one preceding it.The elementary cycle was characterized in standard conditions by three parameters: 1) length ingested (L); 2) time duration (D); 3) ratio between fast phase duration and whole cycle duration (F).The parameters remained stable during a sequence. Compared with narrow ribbon ingestion, wide ribbon ingestion led to a rise in D and a fall in L, and resulted in a reduction of the feeding efficiency.D rose in partially fed animals. With a narrow ribbon, the application of loads exerting a traction opposing ingestion did not induce significant variations in L, D, or F; with a wide ribbon, L and F fell as load increased.

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Section: Parameter Evaluation For the Elementary Feeding Cyclesmentioning

confidence: 99%