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Using an example of the visually directed prey-catching behaviour of the common toad, shows by which criteria objects are distinguished to trigger this behaviour, and how this information is processed in...
Tongue-in-cheek study of cane toads, originally imported into Queensland in 1935 from Hawaii to save the sugar crop from destruction by the greyback beetle. The toads bred rapidly and became an agricultural...
Prey-catching behaviour. Analysis of the visual-key-stimulus ‘prey’ through experiments with dummies (worm/anti-worm configuration). Behaviour with changing stimulation-background contrast. Direction,...
Self-conditioning of the common toad to prey smell and modification of the innate releasing mechanism for prey capture behaviour. ‘Hand conditioning’. Fine differentiation of prey dummies by...
Neuroethological investigational methods. Configurational prey recognition and its directional variance. Neurophysiological recording experiments show the activities of individual neurons in the optic tectum...
Describes the method perfected by Dr John Gurdon at Oxford University for producing the first cloned frogs. The procedures include stimulating donor female frogs ('Xenopus laevis’ the South African clawed...
A summary of a lesson designed to introduce a certificate class to the basic points of a closed circulatory system. The microscopic views the pupils are expected to see at each stage are included.
Demonstrates experimental procedure, using hair loops and glass needles, in removing the neural crest in the ‘Axolotl’ and in implanting the dorsal lip of the blastopore in ‘Xenopus’.*
Gastrulation and neurulation are studied by time-lapse sequences, stereoscan (3-dimensional) pictures of the cell surfaces and by sections examined under both the light and the transmission electron...
Habits and life cycle of ‘Xenopus laevis’; its use in pregnancy tests.
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