Consummatory feeding behavior to amino acids in intact and anosmic channel catfish Ictalurus punctatus.
The entire sequence of feeding behavior patterns exhibited by intact and anosmic channel catfish to food extracts was also released by single amino acids. L-arginine (> 10(-6) M), L-alanine (> 10(-6) M), and L-proline (> 10(-4) M) were each highly effective at releasing consummatory behavior patterns, such as turning, increasing pumping of water across the gill arches, and biting-snapping. Swallowing required solid objects, whereas rhythmic movement of the hyoid was released by > 10(-2) M L-arginine alone. For the biting-snapping behavior, the number of bites depended upon both the number of eddies containing the amino acid above the behavioral threshold concentration and the amino acid applied. Multiple eddies of > 10(-3) M L-proline and L-alanine provoked up to 25 bites per test; however, the most effective stimulus for releasing biting-snapping behavior at low concentrations was L-arginine (behavioral threshold 3 x 10(-7) M). In comparison to 10(-4) M L-alanine and L-arginine, other amino acids were less effective stimuli.
Valentincic
T
T
Department of Zoology and Physiology, Louisiana State University, Baton Rouge 70803-1725.
Caprio
J
J
D000596:Amino Acids; D000818:Animals; D001070:Appetitive Behavior / Q000502:physiology; D001143:Arousal / Q000502:physiology; D001288:Attention / Q000502:physiology; D001921:Brain / Q000502:physiology; D005154:Facial Nerve / Q000502:physiology; D005247:Feeding Behavior / Q000502:physiology*; D007059:Ictaluridae / Q000502:physiology*; D008526:Medulla Oblongata / Q000502:physiology; D009043:Motor Activity / Q000502:physiology; D009412:Nerve Fibers / Q000502:physiology; D009433:Neural Inhibition / Q000502:physiology; D009833:Olfactory Pathways / Q000502:physiology*; D017459:Receptors, Amino Acid / Q000502:physiology; D012683:Sensory Deprivation / Q000502:physiology*; D012903:Smell / Q000502:physiology*; D013650:Taste Buds / Q000502:physiology; D013652:Taste Threshold / Q000502:physiology; D014630:Vagus Nerve / Q000502:physiology
D000596:Amino Acids; D017459:Receptors, Amino Acid