,
On the agonistic display of the Siamese fighting fish: I. The frontal display apparatus
Brain, Behavior and Evolution, 45 (6): 301--313 (июня 1995)
Аннотация
Examined the physiological basis for the agonistic behavior of the Siamese fighting fish. The musculoskeletal structure of the frontal display apparatus was examined. The opercular bones and the opercular abductor, the opercular dilator muscle, appear to have undergone adaptive modifications that facilitate the display. The opercular dilator consists of 3 parts: a deep belly and 2 superficial bellies. Innervation of this muscle is derived from the maxillary division of the trigeminal nerve; all 3 portions are innervated by axons from the same fascicle, suggesting that they are embryologically related. Direct stimulation demonstrates that all bellies can mediate opercular extension. The architectural and biochemical differences among the 3 portions suggest that they are functionally not equivalent.
