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IWDG Documents Evidence of Humpback Whale Scarred by Fishing Gear in Irish Waters

20th October 2020
IRLHB#43 photographed on 11 October 2020 off West Kerry IRLHB#43 photographed on 11 October 2020 off West Kerry Photo: Nick Massett

The Irish Whale and Dolphin Group (IWDG) says it has recently documented evidence of a humpback whale scarred by entanglement in fishing gear in Irish waters.

Humpback IRL#HB43 was photographed in Dingle Bay on Sunday 11 October by IWDG member Nick Massett, who noted in his images some significant scarring on its tail fluke that was not present when the same whale was spotted off West Kerry two months prior.

The charity says this scarring is consistent with entanglement — and it’s believed, based on the marine wildlife giant’s known movements between August and this month, that the lesions were sustained off West Kerry.

Humpback whales regularly feed in Ireland’s inshore waters during the summer and autumn. But this activity also brings the whales into close proximity with active fisheries.

“It’s likely this animal got caught in the rising rope of a marker buoy to a string of lobster pots, or gill net,” Massett says.

Entanglement in fishing gear is an issue of emerging concern to the IWDG, which is working with Dr Charla Basran at the University of Iceland’s Husavik Research Centre to quantify the rate of entanglement of humpback whales in Irish waters.

Dr Basran recently published work showing that 24.8% of 379 individual humpback whales photographed in Iceland presented wrapping injuries and notches known to be indicative of entanglement.

Ireland shares a whale population with Iceland, and the IWDG says will be interesting to quantify the rate of these lesions on whales photographed in Ireland — and potentially reveal where along their journey to the North Atlantic from their southern breeding grounds they pick up their wounds.

The IWDG is planning a workshop on the issue supported by knife-maker Spyderco, which has provided knives customised for cutting ropes from live whales.

Published in Marine Wildlife
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Marine Wildlife Around Ireland One of the greatest memories of any day spent boating around the Irish coast is an encounter with marine wildlife.  It's a thrill for young and old to witness seabirds, seals, dolphins and whales right there in their own habitat. As boaters fortunate enough to have experienced it will testify even spotting a distant dorsal fin can be the highlight of any day afloat.  Was that a porpoise? Was it a whale? No matter how brief the glimpse it's a privilege to share the seas with Irish marine wildlife.

Thanks to the location of our beautiful little island, perched in the North Atlantic Ocean there appears to be no shortage of marine life to observe.

From whales to dolphins, seals, sharks and other ocean animals this page documents the most interesting accounts of marine wildlife around our shores. We're keen to receive your observations, your photos, links and youtube clips.

Boaters have a unique perspective and all those who go afloat, from inshore kayaking to offshore yacht racing that what they encounter can be of real value to specialist organisations such as the Irish Whale and Dolphin Group (IWDG) who compile a list of sightings and strandings. The IWDG knowledge base has increased over the past 21 years thanks in part at least to the observations of sailors, anglers, kayakers and boaters.

Thanks to the IWDG work we now know we share the seas with dozens of species who also call Ireland home. Here's the current list: Atlantic white-sided dolphin, beluga whale, blue whale, bottlenose dolphin, common dolphin, Cuvier's beaked whale, false killer whale, fin whale, Gervais' beaked whale, harbour porpoise, humpback whale, killer whale, minke whale, northern bottlenose whale, northern right whale, pilot whale, pygmy sperm whale, Risso's dolphin, sei whale, Sowerby's beaked whale, sperm whale, striped dolphin, True's beaked whale and white-beaked dolphin.

But as impressive as the species list is the IWDG believe there are still gaps in our knowledge. Next time you are out on the ocean waves keep a sharp look out!

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