FISH 311 Lecture Notes - Lecture 13: Semicircular Canals, Weberian Apparatus, Cichlid
23 Feb 2018
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Difference in vibration in sensed by hair cells in macula. Neuromasts --> send signals and vibrations to the brain. Either in canal or on surface in pits. jell-o mold wiggles and sends signals to sensory cells. Easily damaged by holding the fish and pulling up in nets. Function of the lateral line system -- review for lab #8. Light refracts at transition between media of different densities. At lower angles light gets refracted from the water surface. At certain angles all you see in the water is a reflection of the water that you are in. Open ocean - you want to dial into blue/purple. Coastal waters - you want to dial into green/yellow. Iris --> how much of the lens is exposed. Tapetum lucidum --> reflective glow that comes off back of eye. Two different pigments for seeing in the different environments. Pupillary operculum --> basically a hand that they put over there pupil i.
