Pr. Laming et C. Cairns, EFFECTS OF FOOD, GLUCOSE, AND WATER INGESTION ON FEEDING-ACTIVITY IN THE TOAD (BUFO-BUFO), Behavioral neuroscience, 112(5), 1998, pp. 1266-1272
Feeding in toads was tested by orient, approach, fixate, and snap resp
onses to an artificial prey stimulus, before and at various times afte
r feeding with natural prey (mealworms), or infusion of the gut with a
prey-equivalent amount of glucose or volume of water. Feeding 5 prey
objects or ad libitum feeding caused a decline in a prey catching when
tested 2 hr later. Ingestion of 5 pulped mealworms or the equivalent
glucose content and volume similarly decreased prey-catching, though a
n equal volume of water had no effect. Comparisons of the effect of ti
me after glucose ingestion on prey-catching activity demonstrated that
the major decline in activity occurred within 15 min, with no appreci
able change after 2 hr. An equal volume of water had little effect on
prey-catching activity over 15 min, but subsequent glucose ingestion r
educed these behaviors. Thus, the decline in prey catching that occurs
after feeding in toads can be rapidly replicated by ingestion of gluc
ose,allowing future examination of the neural basis of satiety in thes
e animals.