Fróðskaparrit - 01.07.2004, Page 56

Fróðskaparrit - 01.07.2004, Page 56
54 Spiders (Araneae) in the Faroe Islands: an annotated checklist and an update on inter- island distributions Eiturkoppar (Araneae) í Føroyum: eitt endurskoðað yvirlit og ein dagføring av útbreiðslu innanoyggja Sven-Axel Bengtson1, Pehr Henrik Enckell2, Dorete Bloch3 and Erling Hauge4 1 Museum of Zoology, University of Lund, Helgonav. 3, SE-223 62 Lund, Sweden. Email: Sven-Axel.Bengtson@zool.lu.se 2 Animal Ecology, University of Lund, Ecology Building SE-223 62 Lund, Sweden. Email: Pehr_H .Enckell @ zooekol .lu .se 3Føroya Náttúrugripasavn, FO-IOO Tórshavn, Faroe Islands. Email: doreteb@ngs.fo 4Zoological Museum, University of Bergen, Norway. Email: erling.hauge@zmb.uib.no Úrtak í 1980- og 1990-árunum vórðu fallfellur settar upp í fleiri oyggjum í Føroyum. Tað varð gjørt á rættiliga nógvum støðum, á ymsum búøkjum (eis. høgt uppi) og allar árstíðir. Tað gav rættiliga nógvar nýggjar upplýsingar um støðuna hjá eiturkoppum her á landi, eitt nú vórðu skrásett 10 nýggj sløg, nevniliga Crustulina guttata, Agyneta gulosa, A. ramosa, A. subtilis, Centromerus prudens, Hypomma bituberculatum, Mughiphantes whymperi, Ostearius melanopygius, Arctosa alpigena og Ozyptila atomaria. Harumframt vórðu 3 sløg, ið rakt varð við innandura, funnin fyri fyrstu ferð (Araneus diadematus, A. quadratus og Tegenaria atrica). Tískil er talið á eiturkoppum, ið eru funnir í Føroyum, nú 83. Viðgjørdir verða ávísir tættir (ið mest hava samband við innsavningarhátt og -orku), sum hava virkað til, at fleiri nýggjar upplýsingar eru fingnar til vegar, og nomið verður við nøkur ávís dømi um útbreiðslu og hvørjar broytingar kunnu væntast í støðuni hjá sløgunum. Abstract Pitfall trapping at a large number of sites, on several is- lands, in different habitats (incl. high altitudes), and at all seasons in the 1980s and I990s yielded a consider- able amount of new information on the status of spiders in the Faroe Islands, including first records of 10 species viz. Crustulina guttata, Agyneta gulosa, A. ramosa, A. subtilis, Centromerus prudens, Hypomma bitubercula- tum, Mughiphantes whymperi, Ostearius melanopygius, Arctosa alpigena, and Ozyptila atomaria. An additional 3 species collected indoors are reported for the first time (viz. Araneus diadematus, A. quadratus, and Tegenaria atrica) and hence the current total number found in the Faroes is 83. Some factors (mostly related to collecting methods and effort) contributing to this increase in new information, and some specific cases of distribution and of presumably real changes in the status of species, are discussed. Introduction As the spider faunas of the British Isles and SW Fennoscandia are, by and large, well known (Merrett and Murphy, 2000; Aakra and Hauge, 2000; 2003) new information on the spider species found on offshore and remote islands in the NE Atlantic becomes increasingly interesting, for instance with regard to faunal colonisation of islands and Fróðskaparrit 52. bók 2004: 54-72
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