Genetical and developmental analysis of early call ontogeny in the canary, Serinus canaria.
Item
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Title
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Genetical and developmental analysis of early call ontogeny in the canary, Serinus canaria.
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Identifier
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AAI9946159
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identifier
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9946159
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Creator
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Emmett, Joseph Francis.
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Contributor
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Adviser: Paul C. Mundinger
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Date
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1999
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Language
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English
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Publisher
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City University of New York.
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Subject
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Biology, Zoology | Biology, Genetics
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Abstract
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Border and Roller canaries have been subjected to differential selection regimes. Border canaries have been bred for external morphology while Rollers have been bred for acoustically pleasing low frequency song tours. This study found that the flight, hunger-location and nestling calls of Roller canaries have sustained a significant reduction in frequency (kHz), suggesting that artificial song selection has affected calls.;Reciprocal cross-fostering experiments between Rollers and Borders revealed that Border canary call ontogeny is influenced by the social environment to a greater extent than is Roller call ontogeny.;Reciprocal hybrids (Roller female x Border male, (RB); and Border female x Roller male, BR) produced calls of intermediate frequencies. Further call analysis for the reciprocal hybrids demonstrated a paternal effect. RB hybrids produced calls with more Border-like frequency values. Conversely, BR hybrids produced calls with more Roller-like frequency values. These results are compatible with the phenomenon of parental genomic imprinting. In genomic imprinting the phenotypic expression of the genotype is dependent on the parental origin of the gene(s).;Individual call stereotypy was identified for both the flight call and the hunger-location call, however, the canary nestling call was found to have variable forms (shapes). Birds demonstrating flight call stereotypy possessed one or two stereotyped patterns while all canaries showed individually distinctive signature hunger-location calls.;Artificial selection on Roller canary song has altered hunger-location call frequency modulation patterns. Roller hunger-location calls are either tonal or begin with an ascending frequency sweep. In contrast, Border canaries (which have not been consciously selected for vocal characters) produce hunger-location calls with initial frequency sweeps which descend.;The hunger-location call appears to be employed as a signal which permits parents to locate and subsequently feed fledged young. This study found that canary fledglings can recognize their mother's vocalization and respond to her with their signature hunger-location calls.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
