By J. E. Treherne, M. J. Berridge, V. B. Wigglesworth
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Additional info for Advances in Insect Physiology, Vol. 11
Dethier and Evans suggest that the recurrent nerve carries input from neurones which respond t o haemolymph volume or pressure. Barton Browne (1964), Barton Browne and Dudziliski (1968) and Barton Browne (1968) studied the regulation of water intake by the 34 L. BARTON BROWNE Australian sheep blowfly, Lucilia cuprina. This insect is markedly more responsive t o water after 24 h of deprivation than is P. regina, all individuals showing a strong response to tarsal stimulation, irrespective of the humidity conditions in which they were kept during the period of deprivation.
Brady (1973) studied changes with deprivation in the proportion o f males of the tsetse fly, Glossinu morsitnns, making a probing response when a warm ball of plastic foam was brought into contact with their tarsi. He found that the percentage of mature flies responding increased linearly with time, from a low initial value, over a. period of 4 days of deprivation, and that that of teneral flies responding increased over a 3-day period from 42 L. BARTON BROWNE a higher initial value of 30-40 per cent.
Regina alter according to the state of deprivation is the finding of Dethier et al. (1965) that the changes in the level of central excitation, as measured by subsequent responsiveness to water, generated by the brief stimulation of one labellar hair with sucrose was greater in deprived flies than in recently sugar fed ones, and that the effect increased up t o about 60 h of deprivation. This result appears, at first sight at least, to be incompatible with that of Getting and Steinhardt (1972), but it seems that the two might be reconciled by assuming that the sensory input from the labellar receptors has access t o more than one part of the CNS, and that the part directly involved in proboscis extension is not that in which the perseverating effect is being generated.
Advances in Insect Physiology, Vol. 11 by J. E. Treherne, M. J. Berridge, V. B. Wigglesworth