منابع مشابه
Circadian clock determines the timing of rooster crowing
of a widespread species than to be faced with the challenge of conserving every population because all are distinctive. Undoubtedly, some reptile species have already gone extinct before we even knew they existed. But a lot remain to be discovered: for example, a single square kilometre of Australian desert can contain 14 co-existing species of the lizard genus Ctenotus (many of them so similar...
متن کاملThe Crowing Hen: Early Observations on Spontaneous Sex Reversal in Birds *
Occasionally, throughout the centuries, a farmer has seen an old hen gradually assuming masculine behavior and plumage, or a hunter has found that the "cock" pheasant he had shot was really a female. Such unnatural transformations sometimes chilled the observer with terror of evil things to come, or sometimes, more reasonably, stirred a naive or intelligent curiosity. As superstition flourished...
متن کاملDynamics of crowing development in the domestic Japanese quail (Coturnix coturnix japonica).
Species-specific behaviours gradually emerge, via incomplete patterns, to the final complete adult form. A classical example is birdsong, a learned behaviour ideally suited for studying the neural and molecular substrates of vocal learning. Young songbirds gradually transform primitive unstructured vocalizations (subsong, akin to human babbling) into complex, stereotyped sequences of syllables ...
متن کاملEnergy cost of an avian vocal display: crowing in red junglefowl
Displays are important components of social behaviour and are potential targets for sexual selection. Females may prefer males with particular behavioural repertoires, and several models of sexual selection suggest that males with elaborate or prolonged courtship displays could be indicating their quality to females (Kirkpatrick & Ryan 1991; Maynard Smith 1991). Males may also use displays in i...
متن کاملDopamine Receptor Genes and Evolutionary Differentiation in the Domestication of Fighting Cocks and Long-Crowing Chickens
The chicken domestication process represents a typical model of artificial selection, and gives significant insight into the general understanding of the influence of artificial selection on recognizable phenotypes. Two Japanese domesticated chicken varieties, the fighting cock (Shamo) and the long-crowing chicken (Naganakidori), have been selectively bred for dramatically different phenotypes....
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ژورنال
عنوان ژورنال: Animal Psyche
سال: 1937
ISSN: 1883-6275
DOI: 10.2502/janip1934.3.3-4_8