Fróðskaparrit - 01.01.2002, Page 145

Fróðskaparrit - 01.01.2002, Page 145
143 The Biting Midge Culicoides impunctatus Goetghebuer, 1920 (Diptera: Ceratopogonidae) recorded from the Faroes Bitmýggið Culicoides impunctatus Goetghebuer, 1920 (Diptera: Ceratopogonidae) skrásett í Føroyum Søren Achim Nielsen1 & Boy Overgaard Nielsen2 I: Department of Life Sciences and Chemistry, University of Roskilde, P.O. Box 260 DK-4000 Roskilde, Denmark. Email: san@ruc.dk. 2: Institute of Biological Sciences, Dept. of Zoology, University of Aarhus, Universitetsparken, DK-8000 Árhus C, Denmark. Email: boy.overgaard.nielsen@biology.au.dk Úrtak Bitmýggið Culicoides impunctatus, hevur ikki verið staðfest í Føroyum fyrr, men tað er nú staðfest í ljósfellum, sum hava staðið t Gerðinum, við Mýrarnar, og í Hoyvík í Streymoy. Hetta slagið er víða um, og er í Asia og Evropa, t.d. í Bretlandi (eisini Orknoyum), Danmark og Noregi, men vit vita einki um, at tað er funnið í Islandi og Grønlandi. C. impunctatus, verður vanliga sett í samband við ntýrulendi, og serliga nógv var eisini til við Mýrarnar. Miðal kampa (antennu) lut- fallið (lutfallslið av samanløgdu longdunum av fimm teimum uttastu kampaliðunum sammett við samanløgdu longdirnar av teimum innastu kampaliðunum) á honum var greitt lægri enn miðalvirðini í Bretlandi og Dan- mørk. Hetta bendir á, at kroppurin á hesum dýrum er minni í Føroyum. Hetta mýggjabitaslagið er sera áhald- andi at bíta og tað legst vanliga á fólk og størri dýr. I Føroyum kann tað vera fólk, neyt, seyður og møguliga hara. Hesi bitálop á fenaðin kunnu vera til miklan ampa. Hjá neytum kann tað hava við sær ovurviðkvæmi og hjá rossum kunnu bitini elva til beinleiðis bruna í húðini av ovurviðkvæmi. Við staðfestingini av C. impunctatus leggja vit samstundis aftur at listanum við bitflogkykt- um í Føroyum. Summary The biting midge, Culicoides impunctatus, not hitherto recorded from the Faroes, was collected in light traps operated at Gerðinum, Mýrarnar, and Hoyvík, Streym- oy. The species is widespread, occurring in Asia and Eu- rope, e.g. in Britain (including Orkney), Denmark and Norway, but it is not known from Iceland and Green- land. C. impunctatus, which is associated with bogland, was particularly abundant at Mýrarnar. The mean anten- nal ratios (the ratio of the sum of the length of the apical five segments of the antennal flagellum to the sum of the basal segments) of Faroese female specimens was sig- nificantly lower than mean ratios recorded from Britain and Denmark, indicating smaller absolute body size. The species is an extremely persistent biter, feeding on man and large mammals. In the Faroes man, cattle, sheep and possibly the arctic hare are potential hosts. The feeding on livestock may cause considerable dis- tress, in cattle hypersensitivity to the bites may develop and in horses the biting may give rise to an allergic der- matitis. The record of C. impunctatus adds a trouble- some biting fly to the Faroese fauna. Fróðskaparrit 50. bók 2002: 143-146
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