Why bryozoans have avicularia : a review of the evidence. American Museum novitates ; no. 2789

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dc.contributor.author Winston, Judith E. en_US
dc.date.accessioned 2005-10-06T18:17:51Z
dc.date.available 2005-10-06T18:17:51Z
dc.date.issued 1984 en_US
dc.identifier.uri http://hdl.handle.net/2246/5383
dc.description 26 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 23-26). en_US
dc.description.abstract "This review summarizes the evidence for alternative functions of avicularia and vibracula. In the present paper I review the history of speculation on the adaptive function of avicularia and evaluate the evidence for the various functions suggested for them: defense, food-gathering, creation of water currents, respiration, cleaning, and nutrient storage. Then I suggest some alternative views and ways in which they might be tested. Early workers believed that their function might be defense of the colony, and since Darwin's time this function has become tied in with a selectionist argument in which increasing polymorphism of colonies, specialization of zooids for feeding, reproduction, and defense leads to increasing success. In only a few cases has the function of avicularia and vibracula been empirically established. The pedunculate Bugula type of avicularia has the ability to capture possible enemies. The vibracula of some lunulitiform colonies are used in locomotion and cleaning. No defensive or other function has been demonstrated for other avicularia and in fact, observations on their morphology, behavior, and position in the colony are incompatible with the hypothesis that they act in defense of the colony"--P. [1]. en_US
dc.format.extent 8969893 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2789 en_US
dc.subject.lcc QL1 .A436 no.2789, 1984 en_US
dc.subject.lcsh Bryozoa -- Anatomy. en_US
dc.subject.lcsh Animal colonies. en_US
dc.subject.lcsh Bugula. en_US
dc.title Why bryozoans have avicularia : a review of the evidence. American Museum novitates ; no. 2789 en_US
dc.title.alternative Bryozoan avicularia en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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