Displaying items by tag: orcas
Sightings of an unusual looking bottlenose dolphin off the East Coast in recent weeks have turned out to be a Scottish scrapper named Spirtle.
Images of the dolphin seen off South Dublin and North Wicklow earlier this month showed what appeared to be heavy scarring and discolouration on its right flank.
That was enough for Dr Joanne O’Brien of the Irish Whale and Dolphin Group (IWDG) to identify the animal as the daughter of a dolphin well known in the Moray Firth.
Spirtle’s story is one of survival as almost three years ago to this day, she was found live stranded with significant injuries and suffering severe dehydration.
Since then she’s bounced right back from the brink of death, and it appears she’s now even at the lead of a group of bottlenose dolphins that’s made its way south along the Irish Sea beyond Dublin Bay.
A rare sighting of a different kind was made in West Cork this past week, where a charter boat operator witnessed what he believed was an attack on a pod of common dolphins by a killer whale.
David Edwards was 15 miles south of Galley Head last Tuesday (21 May) when he saw the orca chase after its fellow cetaceans for its lunch — and his images of the event have been confirmed by IWDG sightings officer Padraig Whooley.
Echo Live has more on the story HERE.
#MarineWildlife - Video posted on social media over the weekend of two killer whales spotted off the Co Dublin coast has gone viral.
Trawlerman James Mac Cluskey used his phone to record a few seconds’ glimpse of the pair of male orcas, which came close to his boat some 8km off Rockabill on Saturday afternoon (17 November).
According to the Irish Whale and Dolphin Group (IWDG), it’s the second sighting of the largest species in the dolphin family off the East Coast in recent weeks, with another fisherman reporting an encounter some 22km off Skerries on 30 October.
And it’s believed the duo may be part of the Scottish West Coast Community Group, a unique orca pod long under threat of extinction owning to not having produced any calves for years.
Earlier this year, whales from this group were identified feeding off the Blasket Islands in Co Kerry, showing just how far their range extends.
#MarineWildlife - The RV Celtic Voyager departed the Port of Cork yesterday (Wednesday 24 October) for ‘Operation Orca’, a 12-day survey of an offshore killer whale community associated with the Northeast Atlantic mackerel fishery.
A team of marine scientists from University College Cork is on board the research vessel that’s headed to waters east of the Orkneys, to study the orcas that feed on mackerel between October and February each year.
“This is the first time a dedicated research vessel will be heading up to study these killer whales and we are hopeful to come back with a lot of data,” said PhD researcher and chief scientist Róisín Pinfield in her introductory blog for the survey.
“We will have cameras, GoPros, drones, underwater hydrophones collecting acoustic data so we can hear the killer whales and a RIB so we can get in close if weather conditions allow. Time to pray to the weather gods to keep the storms away!”
The [email protected] blog will be regularly updated by the Celtic Voyager team once they reach the fishing grounds and begin their survey, which runs till Sunday 4 November.
“Killer whale sightings in any Irish waters are rare events, and they seem to be getting rarer,” said Pádraig Wholley of the Irish Whale and Dolphin Group, whose member Nick Massett photographed the orcas in Dingle Bay on Monday 5 March.
Both are members of the genetically distinctive Scottish West Coast Community Group, which commonly feeds in the Hebridean Islands but has previously been found as far as Lough Swilly and Scotland’s east coast, likely in search of food.
“Colleagues from the Hebridean Whale & Dolphin Trust can confirm that John Coe was seen exactly seven days [previously] in Scottish waters … which tells us a lot about the movements of this highly mobile apex predator,” said Wholley.
The Scottish West Coast Community Group has been feared to be on the ‘brink of extinction’ for many years. In January 2016 the pod lost a female member, Lulu, due to what was at first thought to be entanglement with fishing gear but was later blamed on PCB pollution.
Local fisherman Pete Flannery landed what was the first giant squid recorded in Irish waters for 22 years in mid May, as previously reported on Afloat.ie.
But amazingly, he had repeated the feat this month while trawling in the same area, on the Porcupine Bank west of Dingle.
Before this year, only five of the enormous cephalopods had been found in Irish waters since records began in 1673.
What’s more, two of those squid were landed by Flannery’s own father Michael back in 1995.
“I'll probably have to catch a third now so that I can have bragging rights,” Flannery told RTÉ News, which has more on the story HERE.
Elsewhere, a Galway man recorded video of a killer whale carcass washed up on the shore near Roundstone in Connemara.
Independent.ie reports that the orca sighting was confirmed by the Irish Whale and Dolphin Group, whose Mick O’Connell said the species is “neither common nor very rare [but] you wouldn’t see then very often.”
Ireland’s North Coast is a regular haunt for an “evolutionary significant” pod of killer whales that has been under threat for years due to its lack of young.
South Coast Charter Angling skipper Martin Colfer was out with photographer Myles Carroll yesterday (Wednesday 4 January) when they caught a glimpse of the tail fin of the 13-metre-long marine mammal as it slinked back under the surface.
In other Irish whale news, The Times says work has begun on removing the famous diplodocus skeleton replica from London’s Natural History Museum to make way for a blue whale found in Wexford more than a century ago.
As previously reported on Afloat.ie, the whale specimen has been in the museum’s collection since it washed up at Wexford Harbour in 1891, and will now take pride of place in the central that Dippy previously called home since 1905.
Meanwhile, the world’s oldest killer whale is presumed dead after researchers lost track of her movements some months ago, according to the Guardian.
Believed to be 105 years old, ‘Granny’ was the matriarch of a small and endangered group of orcas in Puget Sound, north of Seattle in the north-west United States.
“With regret we now consider her deceased,” researcher Ken Balcomb, who has tracked Granny and her fellow orcas over four decades.
The genetically unique population bares comparison with the distinctive orca pod that splits its time between Ireland and Scotland, and which has faced its own challenges in recent years.
#MarineWildlife - "High pollution levels" could be to blame for the failure of Ireland's only resident killer whale pod to produce any calves.
As reported two years ago on Afloat.ie, the well-known orca pod often seen between Scotland and Ireland has been judged to be on the 'brink of extinction', with its conservation status described as "critical".
Since then the pod's number has dwindled from nine adults to just seven, with no juveniles recorded in the 30 years the so-called Scottish West Coast Community has been monitored by researchers.
One reason for that, posits Dr Simon Berrow of the Irish Whale and Dolphin Group (IWDG), could be "high pollution levels" in the food chain which may have rendered them infertile.
“If you’re moving all around Europe and living a long time, you get a lot of contaminants from fish over time,” he told the Irish Mirror.
That's a theory backed up by evidence of pollutants detected in whale carcasses beached around Ireland in recent years.
Far from the ferocious beasts of horror tales, Ireland's killer whales are considered among the gentle giants in the marine wildlife world - with one recently the recipient of a shark bite on his tail fluke.
Marine scientists have long been interested in the group for their genetic distinctness from other orcas in the north Atlantic, bearing closer relation to their Antarctic cousins.
It's believed that the orca duo may be part of a bigger pod that was feeding off West Cork at the time.
And they seem to be happy finding their own food, unlike their counterparts in the Southern Ocean who have taken to nabbing fishermen's catches.
According to the Guardian, killer whales off the Crozet Islands between Africa and Antarctica have learned to grab Patagonian tooth fish off longlines since a fishery was established there some 20 years ago.
Now scientists say they've found a link between this near constant supply of food and the orcas' reproductive rates. In other words, more fish means more, and healthier, killer whale calves.
#MarineWildlife - BBC News reports that three killer whales from a community of orcas off the Scottish west coast have been spotted off the country's east coast for the first time since scientists began monitoring the group in the 1990s.
Mark Hosford of the Hebridean Whale and Dolphin Trust described the sighting as "a really exciting development".
He added: "The west coast community is thought to be the only resident population of orca in the British Isles, and understanding their behaviour and movements is crucial to the conservation of these remarkable creatures."
The group's normal range includes Scotland's north and west coasts to the west coast of Ireland, and is thought to comprise just nine older whales - which are also believed to be genetically distinct from other orcas in the North Atlantic, showing much closer similarity to Antarctic killer whales.
Sea angling brothers John and Pat Cunningham described the "beautiful sight" of two orcas who emerged from the water by their rowing boat half a mile from the coast off Glencolmcille.
"I've only ever seen them in the North Sea when I was commercial fishing up there", said John of the unexpected rendezvous.
The Irish Whale and Dolphin Group's record of the sighting speculates that the killer whales may be the same pair spotted off Mizen Head in Cork on 11 June and Slea Head in Kerry a day later.
Killer whales are a rare sight so close to the shore but they are no strangers to Donegal - as last year's appearance of a well known orca pod in Lough Swilly demonstrates.
However, fears were expressed earlier this year that that particular family, often seen off the coasts of Scotland and Ireland, is on the 'brink of extinction'.