Náttúrufræðingurinn

Ukioqatigiit

Náttúrufræðingurinn - 1976, Qupperneq 112

Náttúrufræðingurinn - 1976, Qupperneq 112
212 NÁTTÚRUFRÆÐINGURINN lengri tíma, og hafa þær venjulega 10—15 hamskipti í uppvextinum. Bæði fullorðin dýr og nýmfur lifa á ránum, og þykja nýmfurnar hinir mestu ógnvaldar öðrum dýrum í tjörnunum, en geta gert tals- vert gagn með því að halda moskítóflugum í skefjum. SU M M ARY The dragonfly Hemianax ephippiger (Burm.) (Odonada), an unexpected guest in lceland. The dragonfly Hcmianax ephippiger (Burm.), native to the desert districts o£ Africa and soutliern Asia, is known to migrate from its normal home range and has been discovered in Europe as far north as to the British Isles. Norling (1967) reported two specimens found in Iceland (in late September 1941 and on October llth 1964). Mikkola (1968) examined weather maps from the days before the latter discovery and showed, that the meteorological situation in Europe was suitable for passive anemochorous dispersal from the eastern part of the Mediterranean via Scandinavia to Iceland. In 1971 (October 29th and November 5th) two more specimens were found in Iceland (Westman Islands), the first specimen probably found alive, but the latter probably dead, so they most likely arrived to Iceland simultaneously. Now the weather situation highly favoured an anemochorcus dispersal from the western Mediterranean over tlie Atlantic to Iceland, and tliat holds for the days October 26th to 28th. This means that there hardly remains any doubt, that the species is capable of reaching Iceland on its own wings. HEIHILDARIT Chinery, M., 1973: A Field Guide to the Insects of Britain and Northern Europe. Friðriksson, Á., 1941: Glermær lieimsækir ísland. Náttúrufræðingurinn, II: 180-181. Lindroth, C.H., Andersson, H., Böðvarsson, H., Richter, S.H., 1973: Surtsey, Iceland. The Development o£ a New Fauna, 1963—1970. Terrestrial In- vertebrates. Entomologica Scandinavica, Suppl. 5: 102—103. Miltkola, K., 1968: Hemianax epliippiger (Burm.) (Odonata) carried to Iceland frorn the Eastern Mediterranean by an aircurrent? Opusc. Ent., 33: 111-113. Norling, IJ., 1967: Hemianax ephippiger (Burm.) found in Iceland (Odonata). Opusc. Ent., 32: 99-100.
Qupperneq 1
Qupperneq 2
Qupperneq 3
Qupperneq 4
Qupperneq 5
Qupperneq 6
Qupperneq 7
Qupperneq 8
Qupperneq 9
Qupperneq 10
Qupperneq 11
Qupperneq 12
Qupperneq 13
Qupperneq 14
Qupperneq 15
Qupperneq 16
Qupperneq 17
Qupperneq 18
Qupperneq 19
Qupperneq 20
Qupperneq 21
Qupperneq 22
Qupperneq 23
Qupperneq 24
Qupperneq 25
Qupperneq 26
Qupperneq 27
Qupperneq 28
Qupperneq 29
Qupperneq 30
Qupperneq 31
Qupperneq 32
Qupperneq 33
Qupperneq 34
Qupperneq 35
Qupperneq 36
Qupperneq 37
Qupperneq 38
Qupperneq 39
Qupperneq 40
Qupperneq 41
Qupperneq 42
Qupperneq 43
Qupperneq 44
Qupperneq 45
Qupperneq 46
Qupperneq 47
Qupperneq 48
Qupperneq 49
Qupperneq 50
Qupperneq 51
Qupperneq 52
Qupperneq 53
Qupperneq 54
Qupperneq 55
Qupperneq 56
Qupperneq 57
Qupperneq 58
Qupperneq 59
Qupperneq 60
Qupperneq 61
Qupperneq 62
Qupperneq 63
Qupperneq 64
Qupperneq 65
Qupperneq 66
Qupperneq 67
Qupperneq 68
Qupperneq 69
Qupperneq 70
Qupperneq 71
Qupperneq 72
Qupperneq 73
Qupperneq 74
Qupperneq 75
Qupperneq 76
Qupperneq 77
Qupperneq 78
Qupperneq 79
Qupperneq 80
Qupperneq 81
Qupperneq 82
Qupperneq 83
Qupperneq 84
Qupperneq 85
Qupperneq 86
Qupperneq 87
Qupperneq 88
Qupperneq 89
Qupperneq 90
Qupperneq 91
Qupperneq 92
Qupperneq 93
Qupperneq 94
Qupperneq 95
Qupperneq 96
Qupperneq 97
Qupperneq 98
Qupperneq 99
Qupperneq 100
Qupperneq 101
Qupperneq 102
Qupperneq 103
Qupperneq 104
Qupperneq 105
Qupperneq 106
Qupperneq 107
Qupperneq 108
Qupperneq 109
Qupperneq 110
Qupperneq 111
Qupperneq 112
Qupperneq 113
Qupperneq 114

x

Náttúrufræðingurinn

Direct Links

Hvis du vil linke til denne avis/magasin, skal du bruge disse links:

Link til denne avis/magasin: Náttúrufræðingurinn
https://timarit.is/publication/337

Link til dette eksemplar:

Link til denne side:

Link til denne artikel:

Venligst ikke link direkte til billeder eller PDfs på Timarit.is, da sådanne webadresser kan ændres uden advarsel. Brug venligst de angivne webadresser for at linke til sitet.