BIOL 1902 Lecture Notes - Lecture 18: Atlantic Puffin, Trachea

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Component 4: road to immortality: reproduction, asexual vs sexual, sexual cont"d. Advertizing cont"d: auditory advertisements cont"d, male bullfrogs have a large hearing membrane called a. Oddly enough males have larger tympanum then females: birds also advertise with vocalizations. They have no voice box, instead they possess a structure no other animal has. Air is pushed out of the lungs, through the syrinx, and sound comes out of the mouth. The trachea splits into 2, and has an air sac around the split. Many warblers sing two different songs: one for territory ownership, and one for mate: female choice is a major part of sexual selection and a driving force in evolution. Sexual selection is part of natural selection, any trait developed for reproduction: some mammals us vocalizations for mate attraction, ex. During the rut (moose mating season), cow moose call to attract bulls.

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