Sterna, bind 7 nr 8 (PDF-fil) - Museum Stavanger

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konsentrerte koloni av toppskarv på Skarvklakken har sannsynligvis virket stimulerende på havsulen og vil forhåpentligvis bli fredet mot eggsamling slik at den videre utvikling kan studeres uten menneskelig inngrep. Konklirsjon Den første innvandring av havsule til Runde i 1946 har i 1961 og 1967 blitt fulgt av etablering av to nord-norske kolonier henholdsvis i Syltefjord, Øst-Finnmark og på Nordmjele, Andgya. Havsulene kommer på alle tre stedene antagelig fra det samme overskudd eller populasjonstrykk i den stadig voksende britiske bestand, da det øyensynlig stadig skjer en nykolonisering. Dette er szrlig igynefallende i koloniens fprste år hvor det ikke skulle vare noen egentilvekst av hekkefugl, da ungene tar 5-6 år fpr de begynner 3 reprodusere. De noringsrike farvann på kysten av Nord-Norge antas å kunne gi velegnede biotopforhold på en mengde lokaliteter. Biotopvalget for de to nyc havsulekoloniene tyder på at naringsforholdene i sigen er den viktigste faktor ved valg av ny hekkeplass, og at havsulcne ikke setter så store krav til hekkebiotopet som tidligere antatt. SUMMARY BREEDING OF GANNET, SULA BASSANA, IN NORTH NORWAY In June 1962 Troms@ Museum was informed that a number of Ganncts werc apparently nesting on a stack in the 3 km continuous bird cliff at Syltefjord in enst Finnmark. After the 1963 scason this was confirmed by local fishermen who statcd that the site was first occupied in 1961. During the summer of 1964 the author visited the site and made similar visits in 1966 and 1967. In addition, a further new Gannet colony whicli was reported from Nordmjele, Andflya in Nordland, was visited by thc author in Aug. 1967 and breeding was confirmcd. The colony at Syltefjord occupies ledges near the rop of a ca. 40 m high stack which, though attached to the mainland, has vcrtical sides making the colony inacccssible. Kittiwakes and Guillemots also breed on the stack, the latter compcting with the Gannets for nesting sites.
According to local information two pairs, of which one bred, were present in 1961. In 1962 at least three pairs nested and 11 adults were seen, increasing to 30 adults in 1963. At the author's visit on Aug. 6th 1964 only 24 adults and six nests with young werc seen. On July 23th 1966 there were 51 adults and nine nests; on July 14th 1967, 53 adults and 13 nests were counted. The colony at Nordmjele, And~ya is situated on a small rocky islet 2 km from the coast. The islet is ca. 150 m long and 50 m wide reaching an elevation of only 8 m, The vegetation consisted solely of lichens. Apart from the Gannets there is 3 fairly dense colony of ca. 100 pairs of Shags, ca. 20 pairs of Hcrring Gulls and a few pairs of Great Blackbacked Gulls. Three Gannet nests were discovered by locals when gathering gull and shag eggs on May 18th. The practice of annual egg harvesting on the islet establishes that Gannets first bred there in 1967. Although their eggs were taken, the birds relaid and were evidently joined by a fourth pair, as local visitors found one egg and thrce very young chicks on -. Julv 29th. On Aua. 31st when the author visited the site. w only three half-grown young were found; the egg seen on July 29th having disappeared. The nests were situated ca. 4 m above sea-level. Nine adults were seen, all exceptionally timid. As the only examples north of the Arctic Circle these new Gannet colonies are of considerable interest. It is tentatively suggested that the birds orginate from the same, probably British, source as those which are believed to have established the first Norwegian Gannet colony on Runde, near Alesund. The rapid increase of the Rundc colony, and the numbers for the first years at Syltefjord, indicate that in some seasons new individuals must join the colonies. The factors governing the establishment of these two new colonies are discussed. Capelin are believed to be the major source of food in the Syltefjord colony. The atypic colony at Nordmjele shows that the Gannet is less specific in choice of habitat then hitherto believed. LITTERATUR B r u n , E . , 1965: Polarlomvien, Uria lom via (L.), som rugefugl i Norge. - Sterna 6: 229-250. C h r i s t i a n s e n , B . 0 . , 1963: Zoologisk avdeling. - Tromsp Mils. Årsb. 1962: 30-34. Fisher, J. & H. G. Vevers, 1943: The breeding distribution, history and population of the North Atlantic Gannet b la barsana. -j. Aninr. Ecol. 12: 173-213.
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Page 8 and 9: at dcr ctter alt å dgmc ikkjc cr s
Page 10 and 11: SUMMARY: THE RING-NECKED DUCK, AYTH
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Page 16 and 17: T r a n e , Grtrs grtts. - Den 28.
Page 18 and 19: OBSERVASJONER PÅ INDRE FINNMARKSVI
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Page 25 and 26: lene blir sikkert igjen langs trckk
Page 27 and 28: SIEDLUNGSDICHTE-KONTROLLEN IN NORWE
Page 29 and 30: 310 m. B. Aschmann, H. Hansen, G. A
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Page 33 and 34: Phyllosco~tts borealis: In uppigste
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Page 37 and 38: detaljert kartlegging og opptelling
Page 39 and 40: det fjerde reir som var nytt etter
Page 41: Det foregår derfor et tilsig av ny
Page 45 and 46: RØDSTRUPESANGER, NY ART FOR NORGE,
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Page 49 and 50: Ca. l O. ntai: 16. mai: 17. mai: 18
Page 51 and 52: (Latrius sertator) i Finland og Sve
Page 53 and 54: at Øyeren, Encbak. In May/July 196
Page 55 and 56: 72. Blåråke på Lisleby. - Den 24
Page 57 and 58: 82. Myrrihe i Vihf jord. - Da Oslo-
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Page 61 and 62: 92. Liten fltresnapper i Dalane. -
Page 63 and 64: Av storleik og farge kom vi til at
Page 65 and 66: terns were in fact resting on rocky
Page 68: I EUROPAS FUGLER I Norsk utgave vcd

Sterna, bind 7 nr 8 (PDF-fil) - Museum Stavanger

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