منابع مشابه
Not So Long Ago
PERSPECTIVES IN BIOCHEMISTRY: Thirty-one essays presented to Sir Frederick Gowland Hopkins by past and present members of his laboratory. Edited by Joseph Needham and David E. Green. Cambridge University Press, 1937. viii + 361 pp. $4.75. One of the chief difficulties that confronts the individual desirous of acquainting himself with the recent advances in biochemistry is the complexity of the ...
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Bird songs range in form from the simple notes of a Chipping Sparrow to the rich performance of the nightingale. Non-adjacent correlations can be found in the syntax of some birdsongs, indicating that the choice of what to sing next is determined not only by the current syllable, but also by previous syllables sung. Here we examine the song of the domesticated canary, a complex singer whose son...
متن کاملImmediate and long-term effects of testosterone on song plasticity and learning in juvenile song sparrows.
Steroid sex hormones play critical roles in the development of brain regions used for vocal learning. It has been suggested that puberty-induced increases in circulating testosterone (T) levels crystallize a bird's repertoire and inhibit future song learning. Previous studies show that early administration of T crystallizes song repertoires but have not addressed whether new songs can be learne...
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The two-note fee-bee song of male black-capped chickadees functions during the dawn chorus, in part, as a sexual signal across large distances. How song structuremight encode information about male quality, however, remains unclear. We studied the availability of cues to male social rank (a proxy indicator of male quality), within the acoustic structure of dawn chorus songs of male chickadees w...
متن کاملLong memory in song learning by zebra finches.
Young songbirds use memorized tutor songs as templates to shape their own songs. This process requires control of voice by auditory feedback. We prevented zebra finches from hearing their own vocalizations by exposure to loud noise after 35 d of age, before which they had been reared with song tutors from birth. When the noise stopped at 102-200 d of age, the birds sang unstable and noisy song ...
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ژورنال
عنوان ژورنال: The Musical Times and Singing Class Circular
سال: 1881
ISSN: 0958-8434
DOI: 10.2307/3358131