-In the territorial behavior of the stickleback fish, the red belly of one male that elicits attack from another male is functioning as
A) a pheromone.
B) a sign stimulus.
C) a fixed action pattern.
D) a search image.
E) an imprint stimulus.

Question

-In the territorial behavior of the stickleback fish, the red belly of one male that elicits attack from another male is functioning as
A) a pheromone. 
B) a sign stimulus. 
C) a fixed action pattern. 
D) a search image. 
E) an imprint stimulus.

Quizplus · Accepted Answer

The red belly of one male stickleback fish acts as a sign stimulus to another male, triggering aggressive behavior. This visual cue is specifically recognized and elicits a fixed response, fitting the definition of a sign stimulus.

-In the Territorial Behavior of the Stickleback Fish, the Red