ancom_lec21 - Nov 8, 2010 PSY 3364 Animal Communication...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 PSY 3364 Animal Communication Nov 8, 2010 Vocal learning • What are three sources of evidence for vocal learning researchers have investigated to study song development in birds? Evidence for song learning 1. Vocal mimicry Parrots, mynahs, mockingbirds etc. imitate other species 2. Raising birds in isolation Some birds raised in captivity never develop normal songs 3. Tape tutoring, live tutoring Exposure to songs may help overcome effects of isolation 4. Induced deafness Surgically deafened chaffinches do not produce normal songs Development of vocal sounds • Which birds sing? What is a songbird? Passeriforme Order Passeriformes (perching birds) Tyranni (suboscines) Oscines (songbirds) Suborder Vocal learning in birds • Many species of songbirds learn their songs • Depends on discrete, dedicated neural circuits • Phases of song development • Species differences – Sensitive periods, timing of vocal learning – Sex differences – Number and complexity of learned songs – Seasonality of song behavior Song production and motor control • Song production depends on complex, hierarchically organized motor programs • Role of auditory feedback in song development
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Song production and motor control Gonadal steroid hormones have an important effect on song development and control • The development of bird song involves a high degree of plasticity including ongoing neurogenesis and seasonal changes. Swamp and Song Sparrows Swamp Sparrow Song Sparrow Dialect variation in white- crowned sparrows Dialect variation Song dialects • 12 dialects of the Puget Sound white-crowned sparrow Source: http://blb.biosci.ohio-state.edu/nelson.html Dialect variation in bird song Learned or inherited? Effects of rearing in isolation Template matching Template matching Effects of deafening (auditory feedback)
Background image of page 2
3 Stages in song development: white-crowned sparrow • memorization phase (10-50 days of age) • subsong phase (150 days of age) overproduction phase ("plastic song" • overproduction phase ("plastic song") • song crystallization • full song (200 days of age) action-based learning and selective attrition Memory-based learning (10-50 days) Species-specific song is heard Template matched to song No song output Internal template Action-based learning (150-200 days) Song output Hears own song Song matched to template Song crystallization Subsong • 7-second segment of subsong performed by a 240-day old white-crowned sparrow. Source:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/11/2010 for the course PSY PSY 3364 A taught by Professor Dr.peterassmann during the Spring '10 term at University of Texas at Dallas, Richardson.

Page1 / 8

ancom_lec21 - Nov 8, 2010 PSY 3364 Animal Communication...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online