Alderney
Gannetries
Monday 14 July


A reduced ringing team of
Chris
Mourant and Catherine Kinnersly set out for Alderney on Richard
Keen’s boat,
the Margaret K, at 05.30 on Monday 14th July (almost the
same date
as in 2007). Calm seas and a beautiful
sunrise set the day off to a good start with the bonus of spotting a
Guillemot
escorting its chick in the sea just off the Humps north of Herm. Paul
and
Sophie Veron were picked up from Alderney harbour at 07.25 with
additional
breakfast supplies. Paul and Sophie had spent the previous 24
hours on Burhou assessing the gull breeding season there.
There was still
a limited swell
around the Garden Rocks (Les Etacs) when the Margaret K anchored but
with the
tide still dropping, Richard decided that he would row Paul ashore
first. With this successfully
completed, Catherine and Chris were then also dropped ashore and the
work
began. The rock was dry making the
climb up straight forward. It was
immediately obvious that, despite the breeding failures of other
seabirds in
2008, Gannets were once again having a very successful season. There
was the
usual distribution of birds across the rock.
The colony
seemed to be about ten
days behind its normal development with less than a dozen or so
chicks being fully grown, with dark chocolate brown feathering with
white spots
(by this date, the team would expect far more). Certainly
in 2007 there were hundreds of such well grown young by
this date, so many in fact that the team could not enter the main part
of the
colony for fear of these birds panicking and wandering to the edges of
the
rock. This year, the majority of chicks were still covered in white
fluffy
down, but many were large and relatively mobile, making ringing slower
and harder
work. Chris worked the right hand side whilst Catherine and Paul aimed
for the
valley and then worked slowly up the main face shortly after to be
joined by
Chris.
There were up
to a dozen pulli
caught in fishing line/netting which had to be cut free, a few with
disfigured
legs or wings due to the time spent caught. An adult was also set free with ring number F
28302. Another ringed adult was found dead tangled in netting (F
23469). The
amount of orange and blue nylon rope/netting on the Les Etacs (in
particular)
this year was very bad – in fact about as bad as PKV had ever
seen in his c 20
visits over the years since 1978. Clearly the message about the dangers
to
wildlife of discarding nylon netting/rope at sea has not got through
over the
years.
There were very
few young too small
to ring, and very few eggs (although a few chicks were chipping out).
No attempt
was made to ring any adults. With time
limited
(1.5 hours on the rock) and only three ringers, not all available pulli
were
ringed. Richard sounded the boat horn
after approximately an hour and a half and the team, who had been
working
across the first half of the top slope, returned to the boat with 317
pulli
ringed.
A short journey
across to Ortac and
the team were soon heads down again ringing Gannet pulli.
As expected, given its more remote, exposed
location, this colony was slightly
behind Les Etacs in its development, making ringing easier and hence
the grand
total of 432 pulli were ringed. The
nest material on this rock was noticeably of more natural material
(i.e. seaweed)
and only a few young and no adults had to be cut from netting/rope.
With 90
minutes on the rock the team worked most of the colony, but did not go
down to
the lowest face (which often has more than 100 nestlings). After an
hour and a
half the team were picked up by Richard, exhausted but extremely
satisfied with
a grand total of 749 pulli ringed.
N.B a large ray
had been spotted
swimming past the boat when she first anchored at Ortac.
And on the return journey to Guernsey two
Manx Shearwaters were seen.
For the second
year running, the
annual ringing trip to both gannetries had been very difficult. A long
run of
windy weather with sea swells had dogged efforts to get to the
colonies. The
first attempt on 20th June had been thwarted by swell,
although 47
pulli were ringed on the adjacent stack to the main colony at Les Etacs.
With the number
of gannets being
ringed in the UK falling in recent years, and the recovery rates of
birds also
dropping, the scientific value of continuing the very well covered
colonies off
Alderney cannot be underestimated. The total of 796 ringed in 2008 is a
superb
result.
The Seabird
Team is very grateful to
Roland Gauvain (and the Alderney Wildlife Trust) for the flexibility
shown in
the licensing to land on the rocks, to the administrators of the
Channel Island
Ringing Scheme – Margaret and Rich Austin and Ian Buxton (for
similar
flexibility in response to circumstances beyond the control of the
ringers) and
in particular to Richard Keen for his persistence and patience in
(finally) getting
the Team up to and onto both rocks.