PREHATCHING INTERACTIONS IN DOMESTIC CHICKENS AND THEIR INFLUENCE ON BEHAVIOR OF THE YOUNG.
Item
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Title
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PREHATCHING INTERACTIONS IN DOMESTIC CHICKENS AND THEIR INFLUENCE ON BEHAVIOR OF THE YOUNG.
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Identifier
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AAI8023680
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identifier
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8023680
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Creator
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TUCULESCU, RAZVAN ANTON.
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Contributor
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Joseph Griswold
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Date
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1980
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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
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Abstract
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Evidence from several species of precocial birds suggests that the behavior of newly hatched chicks is influenced by embryonic self-stimulation, passive exposure to maternal stimuli and prehatching interactions with the incubating hen. In this study prehatching interactions in naturally incubated broods are analyzed and the influence of the incubating hen on the later behavior of the chicks is investigted. In the first experiment naturally incubated broods were observed and the behavior of embryos and the incubating hen was described. The associations between embryonic and maternal behaviors were analyzed. The embryos and the incubating hen were found to interact and the type of interactions were identified. In the second experiment the behaviors of naturally and artificially incubated embryos were compared. The incubating hen was found to influence embryonic self-stimulation by increasing the frequency of pleasure type calls and decreasing the frequency of distress type calls. In the third experiment, the responses of artificially and naturally incubated embryos to recorded maternal vocalizations were compared. It appears that interactions with the incubating hen influence subsequent embryonic responses to maternal calls. A higher proportion of naturally incubated embryos distress called when exposed to unfamiliar recorded clucks. In the fourth experiment, filial responses of newly hatched artificially and naturally incubated chicks were compared. The results show that, during nest leaving, naturally incubated chicks follow the hen more readily than artificially incubated ones.;It is concluded that, as a result of different prehatching experience, the behaviors of naturally and artifically incubated chicks might not be comparable. Although artificially incubated chicks are capable of responding selectively to the species-typical maternal stimulation, prehatching exposure to the incubating hen leads to familiarization, increased attractiveness and differentiation between stimuli. It is hypothesized that embryonic self-stimulation with distress type calls could influence the development of selective responsiveness to maternal calls in artificially incubated chicks.
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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.
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Program
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Biology
