On the Acoustic Basis of Species Identification in Wood Ducklings (Aix sponsa): Erratum.

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Abstract
Reports an error in the original article by Gilbert Gottlieb (Journal of Comparative & Physiological Psychology, 1974[Dec], Vol 87[6], 1038-1048). The time base for the Sonagrams in Figure 7 on page 1046 should be .5 and 1.0 sec instead of 1.0 and 2.0 sec. (The following abstract of this article originally appeared in record 1975-11335-001.) Tested the hypothesis that frequency modulation is an important feature of the acoustic basis of species identification by synthesizing a call that was as attractive to maternally naive wood ducklings as the natural wood duck maternal call itself. 3 experiments were performed with over 250 wood ducklings hatched in the laboratory from eggs collected in the wild. The critical acoustic feature of the wood duck maternal call is a descending frequency modulation. It is suggested that the attractiveness of the wood duck maternal call to maternally naive ducklings derives, at least partially, from prior exposure of the ducklings to their own embryonic vocalizations, each of which is composed of a very pronounced descending frequency modulation. (PsycINFO Database Record (c) 2006 APA, all rights reserved)

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