Portal de Periódicos da CAPES

Chemoreception and feeding behaviour in a caterpillar: towards a model of brain functioning in insects

1988; Wiley; Volume: 49; Issue: 1-2 Linguagem: Inglês

10.1111/j.1570-7458.1988.tb02483.x

1570-7458

L. M. Schoonhoven, F. Sherman Blom,

Insect and Pesticide Research

Abstract The quantitative relationship between chemoreceptor activity during food intake and total amount of food ingested per unit of time has been studied in last instar larvae of Pieris brassicae. Data on sensory responses and feeding intensity, derived from a study by Blom (1978), show a strong correlation between receptor activity during 1 sec periods of stimulation and food intake during 24 h. It is concluded that nerve impulses from chemoreceptors, which signal the presence of different phagostimulants, are summated algebraically in the central nervous system. Impulses from feeding deterrent receptors counteract the effects of phagostimulants. One impulse from a deterrent receptor neutralizes 2.5 impulses from phagostimulant receptors. Based on the relationships observed a simple model of a feeding centre in the central nervous system has been constructed (Fig. 8).