PSYCH 1XX3 Chapter 7: Chapter 7.docx
Document Summary
Mechanoreceptors sensory receptors sensitive to changes in pressure: used for, hearing, detecting own body position and orientation (humans and fish, information about water (water pressure/velocity/diection, movement of other organisms. Olfaction the detection of airborne chemical stimuli (smell) Gustation the detection of dissolved chemicals, often within the mouth (taste) Minnows use chemoreception system to recognize predators. Bullhead catfish use chemoreception to locate stationary food: study. How nocturnal piscivorous catfish find food in the dark. Whether catfish can use cues provided only from the wake of individual fish to stalk and attack their prey. Catfish allowed to acclimate for one hour in the dark, then first guppy was added. 3 behaviour sequences: path following 80% occurred on moving guppies, head on encounters, attack on stationary guppy. Conclusion the catfish appeared to be following the wake of the guppies to find and attack their prey in the dark.
