Videler, Johannes Jozef

English

1. An account is given of the morphological structures in the tail region of the \"typical fish\" Tilapia nilotica (fam. Cichlidae), emphasizing the mechanical properties of the caudal skeleton, the vertical septum, the joints between the fin rays and the body, the muscles and tendons and the skin fascia. Two large cartilaginous plates, situated in the vertical septum, are described for the first time. 2. Detailed descriptions of the transformations of the caudal peduncle and fin during short series of lateral undulations of the body and fin are presented. 3. Mutual comparisons of the morphological descriptions with the descriptions of the movements show how structures in the tail are suited to the transfer of propulsive forces, generated by the oscillating tail fin, from the fin to the body. The way structures transfer oscillating movements from the body to the fin and the way muscle activity and several properties of the joints are able to affect the final form of the fin stroke are discussed. 4. A brief account is given of electromyographic data collected and of some problems concerning the use of electromyography in the tail region. 5. It is suggested that the skin fascia collaborates with the myotomes and myosepts to bend the body and the fin. ... Zie Summar

Proceedings - University of Groningen

   University of GroningenOn the interrelationships between morphology and movement in the tail of cichlid fish Tilapianilotica (L.).Videler, Johannes JozefIMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite fromit. Please check the document version below.Document VersionPublisher's PDF, also known as Version of recordPublication date:1975Link to publication in University of Groningen/UMCG research databaseCitation for published version (APA):Videler, J. J. (1975). On the interrelationships between morphology and movement in the tail of cichlid fishTilapia nilotica (L.). s.n.CopyrightOther than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of theauthor(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).The publication may also be distributed here under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license.More information can be found on the University of Groningen website: https://www.rug.nl/library/open-access/self-archiving-pure/taverne-amendment.Take-down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons thenumber of authors shown on this cover page is limited to 10 maximum.Download date: 03-06-2022ON THE INTERRELAT IONSHIPS  BETWEENMORPHOLOGY AND MOVEI \ ,TENT  IN  THE TA IL  OFTHE CICHLID  F ISH T ILAPIA  N ILOTICA (L . )byJ .  J .  V I D E L E R((oologital Laborator2, Uniaersitlt of Groningen, The Netherlands)S U M M A R Y1. An account is given of the morphological structures in the tail region of the"typical fish" Tilapia nilotica (fam. Cichlidae), emphasizing the mechanical propertiesof the caudal skeleton, the vertical septum, the joints between the fin rays and thebody, the muscles and tendons and the skin fascia. Two large cartilaginous plates,situated in the vertical septum, are described for the first time.2. Detailed descriptions of the transformations of the caudal peduncle and finduring short series of lateral undulations of the body and fin are presented.3, Mutual comparisons of the morphological descriptions with the descriptions ofthe movements show how structures in the tail are suited to the transfer of propulsiveforces, generated by the oscillating tail fin, from the fin to the body. The waystructures transfer oscillating movements from the body to the fin and the waymuscle activity and several properties of the joints are able to affect the final formof the fin stroke are discussed.4. A brief account is given of electromyographic data collected and of some prob-lems concerning the use of electromyography in the tail region.5. It is suggested that the skin fascia collaborates with the myotomes and myoseptsto bend the body and the fin,C O N T E N T SI. Introduction. 144II. Methods 145III. Terminology and definitions 146l. Names of the skeleton and parts of the fin 1462. Names of soft parts like muscles, cartilage and connective tissue 1473. Names of planes and movements. 150IV. Morphology. 152l. Morphological technics 1522. The skeleton, fin rays and raylets 1523. The vertical septum and the connection with the caudal fin 1554, The muscles and tendons 1614.1. Marginal muscles 1614.2. Profundal muscles 1634.3. Superficial muscles and horizontal septum. 1655. The skin 167V. Movements of the tail . 16B1. Technical approach 1692. Description of movements in the frontal planes 1,72

On the interrelationships between morphology and movement in the tail of cichlid fish <i>Tilapia nilotica</i> (L.).

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On the interrelationships between morphology and movement in the tail of cichlid fish <i>Tilapia nilotica</i> (L.).

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