Fróðskaparrit - 01.01.2009, Page 99

í EITT ÁR VÓRÐU REIÐURSTAÐIR HJÁ HAVHESTI (FULMARUS CLACIALIS) f FØROYUM
EYCLEIDDIR VIÐ VAKMYNDATÓLI
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Nest-site Year Last adult First arrival Days absent December Days Total time Remark
1 2005 4 Sep 18 Dec 105 5 50 min Chick
1 2006 9 July 24 Dec 168 1 1 min Egg lost1
2 2005 29 Aug 23 Dec 117 1 2 h 29 min Chick
2 2006 18 July 6 Dec 141 1 4 min Egg lost1
2 2007 1 July nd - nd Egg lost1
3 2005 nd 9 Dec - 6 2 h 10 min Egg2
3 2006 nd 30 Nov - 10 21 h 13 min
6 2005 14 Aug 20 Dec 128 1 1 min Chick3
6 2006 21 July 17 Jan 180 0 0 Egg lost1
7 2005 nd 15 Dec - 4 4 h 58 min
11 2005 nd 9 Dec - 1 54 min
11 2006 5 Aug 3 Dec 120 9 11 h 27 min Chick3
12 2005 1 Sep 20 Dec 110 5 14 h 27 min Chick
15 2005 nd 20 Dec - 4 6 h 28 min
15 2007 9 July nd - nd Egglost1
'Egg deserted/predated: nest-sites nos 1 and 15 between 8-17 June, nest-site no. 2 on 30 June 2006 and 10 June
2007, and nest-site no. 6 on 6 June (predated the same day).
2lncubating on 7 June. No further information.
3Died on 17 Aug (nest-site no. 6) and killed by rat on 3 Aug (nest-site no. 11).
Table 5. Dates of departure and first arrival and nest-site attendance in December of Northern Fulmars recorded
t>y video surveillance cameras in the Faroe Islands.
total time spend at the nest-site in Decem-
ber varied considerably from one minute to
>21 hours; thus demonstrating that, at this
time of the year, the fulmars only visited the
nest-sites intermittently.
Pre-breeding period
Monthly attendance by one or both partners
Throughout the period January-May month-
ly attendance on nest-sites never exceeded
"13-15% of the total time (Fig. 1). The general
Pattern, with reference to two-bird-atten-
dance, was a peak in April followed by a
marked drop in May, though for one-bird-
attendance in 2007 the peak was in May (Fig.
T). FJowever, the deviation in May 2007 was
caused by nest-site no. 2 and when exclud-
ing those data in the analysis the peak in
April was statistically significant (p< 0.001)
in reiation to the other months; except for
one-bird-attendance in February 2006.
Timing andfrequency of copulations
In 2006 copulations were recorded from 11
to 30 April and in 2007 between 20 April and
1 May (Table 6). For the individual pairs the
time between first and last copulation recor-
ded at the nest-site varied considerable (2-
19 days), as did the total number of success-
ful copulations (3-33). The mean number of
copulations per day varied from 1.0 to 8.3;
with a statistically significantly higher num-