An experiment was carried out to investigate proximate mechanisms of behavioural phase change in the locust Locusta fictiva (Figure 2 below). Solitarious locusts were injected with XDA, a dopamine receptor antagonist, either 1 h before or immediately after crowding them for 4 h (N=30 each). A control group of solitarious locusts received a saline injection 1 h before crowding (N=30). Locusts of all three groups were then observed in a behavioural arena to determine their probability of gregariousness (Pgreg). Briefly describe the result and discuss what conclusions you can draw about the proximate mechanism of phase change in this species.
An experiment was carried out to investigate proximate mechanisms of behavioural phase change in the locust Locusta fictiva (Figure 2 below). Solitarious locusts were injected with XDA, a dopamine receptor antagonist, either 1 h before or immediately after crowding them for 4 h (N=30 each). A control group of solitarious locusts received a saline injection 1 h before crowding (N=30). Locusts of all three groups were then observed in a behavioural arena to determine their probability of gregariousness (Pgreg). Briefly describe the result and discuss what conclusions you can draw about the proximate mechanism of phase change in this species.
Essentials of Pharmacology for Health Professions
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An experiment was carried out to investigate proximate mechanisms of behavioural phase change in the locust Locusta fictiva (Figure 2 below). Solitarious locusts were injected with XDA, a dopamine receptor antagonist, either 1 h before or immediately after crowding them for 4 h (N=30 each). A control group of solitarious locusts received a saline injection 1 h before crowding (N=30). Locusts of all three groups were then observed in a behavioural arena to determine their probability of gregariousness (Pgreg). Briefly describe the result and discuss what conclusions you can draw about the proximate mechanism of phase change in this species.
Transcribed Image Text:d
бәлб
1.00
0.75
0.50
0.25
0
T
O
O
HO
Saline XDA
XDA
before before
after
crowding crowding crowding
Injection treatment
Figure 2. The effect of injecting the dopamine receptor antagonist XDA, or a saline
control, on the probability of gregariousness (Pgreg) in Locusta fictiva. N = 30 per
treatment group.
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