BIOL 1108 1st Edition Lecture 13 Outline of Last Lecture I Oviparous Viviparous Ovoviparity Species II Development III Sensory Systems Outline of Current Lecture I Functions of Smell II Electroreception III Magnetic Reception IV Exam review Current Lecture I II III IV Function of Smell 1 Locate food 2 Locate mates 3 Return to natal sites imprint on the natural chemical signal of river 4 Avoid predators o Alarm substrates that notify schools of fish if a member is wounded Electroreception Ability to detect minute electrical fields Detection of prey muscle contractions Communication Electrocytes cells stacked in columns arranged in a way that magnifies large electrical currents most fish with a lot of electrocytes use electric currents to stun prey Ex Electric ray 20 to 50 volts Ex Electric Eel 500 volts Magnetic Reception Detect the Earth s magnetic field Used to navigate mostly for salmon tuna or trout to travel to natal site Common for migrating in other vertebrates Exam review Short answer questions few sentences These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Longer discussion questions half a page most likely coming from articles Definitions of term visa versa fill in the blank Listing section Know characteristics of different taxonomies Evolutionary terms and trends isolating mechanisms types geographic variation Be familiar with the geologic time scale eras periods first fishes first vertebrates
View Full Document
Unlocking...