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Unusual whale species recorded off the UK

05/08/2010 10:01:17
whales/nov_2009/sei_whale_seawatch

A possible Sei whale sighting off Orkney is one of the unusual sightings. Credit Seawatch/C Swann

Surprises as whale and dolphin watchers call for public support
August 2010. 14, and possibly even 15, species of cetaceans (whales, dolphins and porpoises) have been seen in the seas around the UK this year, and Sea Watch, organisers of the UK National Whale and Dolphin Watch, which, are hoping members of the public will be able to help spot even more. Sightings will help scientists understand more about their abundance and distribution.

13 regular visitors, and 2 very unusual species
Thirteen of the species are regular visitors to UK waters, although this year some have turned up in unexpected locations. The 14th species spotted was a Sowerby's beaked whale off Kent in July, which later stranded and perished. Sowerby's beaked whales normally live in ocean canyons exceeding 1,000 metres depth, far to the west of the British Isles, so a sighting off the Isle of Sheppey is a rare event. Sadly it was found dead the next day at Seasalter near Whitstable. 

So far this year Sea Watch scientists have received a number of interesting records:

The first was in February with sightings of a newborn bottlenose dolphin calf off Anglesey in North Wales. Bottlenose dolphin calves are usually born between March and September.
• In April there were sightings of killer whales in the Irish Sea, off the Isle of Man, earlier in the season than expected.
• In May a group of almost 100 long-finned pilot whales was seen in the Cromarty Firth and then spotted travelling the coast of north east Scotland where they were last observed at Lybster, Caithness. This species rarely visits so close to shore.
• Killer whale (orca) sightings inshore on the northern and north east coasts of Scotland in May were higher than they have been for several years.
• In June and July a sperm whale was identified a number of times off Torbay in Devon. It is rare to see this magnificent animal so far east in the English Channel and in such shallow water.
• Three northern bottlenose whales in Scrabster Harbour, Caithness, were recorded in July by experienced Sea Watch observer Karen Munro (the species of whale that swam up the River Thames in 2006 was a northern bottlenose whale).
• Sea Watch also received confirmed sightings of bottlenose dolphins off Hilbre Island in the Dee estuary in July - one of the most easterly records for the species in the Irish Sea.
• Short-beaked common dolphin sightings are becoming increasingly seen off the north of Scotland and in the North Sea - a few years ago it would be rare to see this species there.
• At the end of July almost 50 white-beaked dolphins were watched from Souter Head, Cove, five miles south of Aberdeen harbour. (Although the white-beaked dolphin is the most common dolphin in the North Sea, it is unusual for such a large group to come so close inshore. They were probably in pursuit of fish).
• On August 1st at least two northern bottlenose whales were recorded in the Wash off Norfolk, heading Southwest. These animals are normally found in deep waters in the North Atlantic. It is thought that some lose their way during the migration from the Norwegian Sea past the Northern Isles to the North Atlantic which is why we sometimes see these animals off the British coast. 

Sei whale and calf off Orkney

Sea Watch has also just received unconfirmed sightings of a 15th species - a Sei whale mother and calf off Orkney. If confirmed this would be a highly unusual sighting of this relatively rare whale which is usually found in deep Atlantic waters from Iceland and Norway south to the Iberian Peninsula. The last sighting of a Sei whale in the Orkney region was in July 2008 when one was seen a few miles east of Stronsay. The previous sighting was in almost exactly the same locality in July 1980.

A newborn bottlenose dolphin calf off Anglesey in
North Wales. Bottlenose dolphin calves are usually born
between March and September.
The charity's Director Dr Peter Evans said: "Marine mammals are an important barometer of the health of our waters. By monitoring where, when and how many are seen, we can pick up trends in populations, and identify human pressures such as pollution, disturbance or entanglement in fishing gear.

"There is still a great deal we need to understand about our marine mammals so that we can put in place effective conservation measures - where they go, how they interact with humans, and where they feed and breed. Any sightings or photographs that the public can send in can help unlock some of the mysteries.

"A concentrated watch over a number of days enables us to build up a snapshot of marine mammals around our coast. This is the ninth successive year the watch has been held, and it provides us with vital background information, as well as raising awareness about the diversity of species that our waters sustain."

The 13 species most often seen in UK waters are: Minke whale, fin whale, humpback whale, sperm whale, northern bottlenose whale, long-finned pilot whale, killer whale (orca), Risso's dolphin, Atlantic white-sided dolphin, white-beaked dolphin, common dolphin, bottlenose dolphin, and harbour porpoise.

 

Take part in National Whale and Dolphin Watch

National Whale and Dolphin Watch runs from Saturday August 7 to Sunday August 15, from land and sea. 

More details » 

 

 

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