X-ray measurements of gill-arch movements in filter-feeding bream, Abramis brama (Cyprinidae) |
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| Authors: | W. Hoogenboezem,&dagger ,F. A. Sibbing,J. W. M. Osse,J. G. M. v.d., Boogaart,E. H. R. R. Lammens,&dagger A. Terlouw |
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| Affiliation: | Department of Experimental Animal Morphology and Cell Biology, Agricultural University, Marijkeweg 40, 6709 PG Wageningen, The Netherlands;Limnological Institute, Tjeukemeer Laboratory, de Akkers 47,8536 VD Oosterzee, The Netherlands |
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| Abstract: | The technique of X-ray cinematography was used to study pharyngeal movements in Abramis brama (L.). The theoretical and practical problems in X-ray cinematography of feeding fish are discussed, as well as criteria for the selection of images suited for detailed measurements.
Respiration and filter-feeding on Daphnia pulex (length c . 1 mm) show different gill arch movement patterns in bream. Slits between gill-arches are kept smaller during filter-feeding. In addition, during filter-feeding, this inter-arch distance decreases considerably in a posterior direction. The hypothesis that particle retention occurs on the slits formed between adjacent gillarches and their gill-rakers is not supported by the present results. |
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| Keywords: | Abramis brama filter-feeding gill slits feeding mechanism branchial sieve |
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