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Indirect chemo-orientation based on internally stored information

3 INDIRECT CHEMO-ORIENTATION BASED ON INTERNALLY STORED INFORMATION [Pg.97]

Arrestment and escape, as reviewed recently by Kennedy (1977,1978), can be accomplished by modulating locomotory rate and turning velocity. For example, increased turning velocity and decreased locomotory rate allows an insect to remain in a resource patch (Gunn and Pielou, 1940), whereas decreased turning velocity and increased locomotory rate allow an insect to escape from a stress source. Temporal comparison seems most likely to be the mode used to process gradient information that leads to output in terms of alterations in locomotory and turning rate. Contrary to some notations in the literature, the spatial-temporal stimulus pattern or at least thresholds must be monitored by the animal in order for these mechanisms to work. [Pg.100]




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