الرئيسية International Journal of Acarology Spinning mites ( Neocheyletiella media Fain, 1972) (Acari:...
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International Journal of Acarology ISSN: 0164-7954 (Print) 1945-3892 (Online) Journal homepage: http://www.tandfonline.com/loi/taca20 Spinning mites (Neocheyletiella media Fain, 1972) (Acari: Cheyletiellidae) on feathers of the domestic Japanese nightingale (Leiothrix lutea (L.)) F.M. Kniest & J.R. Hoffman To cite this article: F.M. Kniest & J.R. Hoffman (1983) Spinning mites (Neocheyletiella media Fain, 1972) (Acari: Cheyletiellidae) on feathers of the domestic Japanese nightingale (Leiothrix lutea (L.)), International Journal of Acarology, 9:2, 63-65, DOI: 10.1080/01647958308683314 To link to this article: http://dx.doi.org/10.1080/01647958308683314 Published online: 17 Mar 2009. Submit your article to this journal Article views: 10 View related articles Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=taca20 Download by: [University of Florida] Date: 20 May 2016, At: 06:06 Vol. 9, No. 2 Internat. J. Acarol. 63 SPINNING MITES (NEOCHEYLETIELLA MEDIA FAIN, 1972) (ACARI: CHEYLETIELLIDAE) ON FEATHERS OF THE DOMESTIC JAPANESE NIGHTINGALE (LEIOTHRIX LUTEA (L.)) F. M. Kniest' and J. R. H o f f m a n 2 Downloaded by [University of Florida] at 06:06 20 May 2016 1. Department o f Aquatic Ecology, Catholic University, Nijmegen, The Netherlands. Present Address: Laboratory o f Minibiology, "'Vakgroep Dermatologie", State University, Utrecht, The Netherlands. 2. College o f Natural Science, Michigan State University, E. Lansing, Michigan, U.S.A. A B S T R A C T - - A report of a rare cocoon-like structure made by mites of the family Cheyletiellidae, Neocheyletiella media Fain, 1972, on feathers of a dead aviary bird, Leiothrix lutea (L.) is given. The scanning electron microscope photographs show more or less adhering strands, which form a cocoon-like structure. The purpose of this cocoon-like structure is probably protection of eggs and immature stages. These were frequently found in the webbing. INTRODUCTI; ON Although spinning is mostly found among members of the Aranea (spiders) and Lepidoptera (butterflies), a number of mite taxa also spin. The most commonest are the mites of Tetranychidae and Bdellidae which are plant feeding or predatious Some ectoparasitic mites of the family Cheyletiellidae (Volgin, 1966) spin nest-like structures on skin and hairs of small mammals and on the skin of birds. Until now cocoon-like structures were not found on feathers of birds. MATERIAL AND METHODS Examination of a dead aviary bird, Leiothrix lutea (L.), sent to Dr. F. S. Lukoschus, Department of Aquatic Ecology, Catholic University of Nijmegen (The Netherlands), disclosed that the bird was heavily infested (about the head and neck) with spinnings of Neocheyletiella media Fain, 1972. To study the parasitope, all feathers were examined. Silken strands were observed through a polarizing optical microscope with phase-contrast (Wild) and by scanning electron microscope of gold-plated specimens (Figures 1 and 2). RESULTS The spinning formed an irregular cocoon-like structure of randomly layed strands adhering together and to the barbs and barbules of the feathers of head and neck. Approximately 50°7o of the sections of the cocoon-like structures appeared to consist of non-strand-like material (Figure 3). The silken fibres are stuck partly to the external surface of the eggs. Under the optical polarizing microscope the strands were light-rotating counter to the material inside the female. The cocoon-like structure contained all stages and instars but principally immature mites and eggs. Adult stages, both male and female, were found in the greatest numbers on the breast and under the wings. 64 Kniest & Hoffman 1983 Downloaded by [University of Florida] at 06:06 20 May 2016 1 Fig. 1: Scanning-electron microscope photograph of a cocoon-like structure on a downy neck feather of Leiothrix lutea (L.) (magnification 100x). 2 3 Fig. 2: Detail o f figure 1 (magnification 3600x) which shows the more or less adhering strands. Fig. 3: Detail of figure 1 (magnification 1200x) which shows the non-strand-like material. Vol. 9, No. 2 Internat. J. Acarol. 65 DISCUSSION The family Cheyletiellidae has a number of genera that are known to be parasitic: Neocheyletiella, Ornithocheyla, Ornithocheyletia and Bakericheyla (bird-parasites) and Nihelia, Eucheyletia, Cheyletiella and Criokerion (small mammal parasites). The webbing of some mites may be used for protection of the eggs, larva and other stages during molting as well as to hold prey (Krantz, 1978) (Jeppson et al., 1975). Downloaded by [University of Florida] at 06:06 20 May 2016 This report covers one of the very few (if any) reported discoveries of the cocoon-like structure of this mite in The Netherlands. The purpose would appear to be protection of the eggs and immature stages against predation. The location of the cocoon-like structures on the dorsal sides of the feathers on neck and head would provide additional protection from the bird trying to rid itself of the parasites by either scratching or rubbing these parts of the body. The female also covered her eggs with fibres after she has finished egg-laying. This system of attaching eggs is similar to that observed with louse-eggs or those of the related family Myobiidae (personal communication Dr. F. S. Lukoschus). It would be interesting to know in future of other reports of cocoon-like structures on the feathers of birds. ACKNOWLEDGEMENTS We thank Dr. F. S. Lukoschus, Department of Aquatic Ecology, Catholic University, Nijmegen, the Netherlands for providing the material and for his help by determinating the species. Also Dr. J.E.M.H. van Bronswijk, Laboratory of Minibiology, "Vakgroep Dermatologie", State University, Utrecht, The Netherlands for correcting the manuscript and Mr. A. W. Dicke, Department of Botany, "Werkgroep Submicrocopische Morfologie", Catholic University, Nijmegen, The Netherlands for his help by making the electron scanning microscope photographs. REFERENCES Ewing, S. A., J. E. Mosier & T. S. Foxx (1967). Occurence of Cheyletiella spp. on dogs with skin lesions. J. Amer. Vet. Med. Ass. vol. 151, no. 1: 64-67. Jeppson, L. R., H. H. Kiefer & E. W. Baker (1975). Mites injurious to economic plants. University of California Press, Berkley and Los Angeles, California: 1-614. Krantz, G. W. (1978). A manual of Acarology. Oregon State University Book Stores, Inc., Corvallis, U.S.A.: 1 -509.