Showing posts with label Porcupine sea bight. Show all posts
Showing posts with label Porcupine sea bight. Show all posts

Friday, 9 August 2013

The Porcupine Seabight

The Porcupine Seabight is an interesting oceanographic feature located a hundred or so nautical miles  WSW off the southern coast of Ireland. It is a large depression where the water rapidly deepens and leads out to the abyssal depths of the North Atlantic. The strong ocean currents form nice areas of nutrient-rich upwelling so there is often an abundance of marine life- plankton, shoals of pelagic fish including albacore and yellow-fin tuna, cetaceans and seabirds- at least that is what it said in the tourist brochure! In all honesty there have been good numbers of fin whales- sometimes 5 or 6 in a day, the fishing fleets of Ireland and Spain are actively fishing for tuna, but seabirds have been rather scarce. Admittedly I see gannets and fulmars every day but numbers are low. A few lesser black-backed gulls have followed the survey vessel on occasion and I have had good days where I have seen four species of shearwater- Great, Corys, Sooty and Manx- but again numbers have been disappointing. I have also see a few bonxies, 2 Sabines gulls- both magnificent adults in summer plumage a few storm petrels and 1 wilson's petrel- I can't complain but I hope that numbers increase over the coming weeks! Unfortunately I have struggled with poor light and distant birds so taking photographs has been challenging, although this morning a great shearwater came within 40 metres of the bow, allowing me to rattle off a few snaps. Hopefully the sunshine and a nice Fea's or Bulwer's petrel are not too far away! 

great shearwater
great shearwater
nice flock of manx shearwaters
manx shearwaters- incredible how the light affects the plumage tones!




Thursday, 1 August 2013

Great, Cory's and Wilson's- when lifers don't count! :(

Joined my survey vessel yesterday in a nice little port in the SW of Ireland. We steamed down the river Shannon, then overnight on the open sea. This morning I awoke over the Porcupine sea bight WSW of Mizen head in about 1600 metres of water. I spent the morning working and getting organised and then spent 3 hours on watch this afternoon. It was very quiet aside from a few gannets and fulmars and a solitary great skua and a fly-by turnstone. The sea was choppy but not unduly so, however the watch was made difficult by intermittent heavy rain and rolling damp fog banks that left water droplets on everything. The light was dull and everything had a soggy feel to it and as there was not much about I didn't bother taking the camera out onto the deck- then things changed for the good with 4 great shearwaters, a Cory's shearwater and a Wilson's petrel flying past the bow of the vessel in quick succession! Although I have seen thousands of both of these shearwater species and scores of Wilson's I have not seen any of these 3 species in British waters and so all 3 are needed for my 'British list'! Of course having checked my position on the nautical charts I confirmed my worst fears in that I am working in the Irish sector- by a significant margin! The moral of the tale is always, always have the camera ready and also too consider starting a British and Irish life list! The camera (in a plastic bag) will be on deck for the rest of the voyage!