Two whales suf­fered blunt trauma

An­other killed by fish­ing gear in Gi­ulf of St. Lawrence, says vet

The Guardian (Charlottetown) - - ATLANTIC - BY ALI­SON AULD

In­juries suf­fered by at least two of six North At­lantic right whales found float­ing life­less in the Gulf of St. Lawrence ap­pear to be con­sis­tent with ship strikes, marine mam­mal ex­perts say.

Tonya Wim­mer of the Marine An­i­mal Re­sponse So­ci­ety said Tues­day that the pre­lim­i­nary find­ings of necrop­sies on three of the whales in­di­cate that two of them sus­tained blunt trau­mas that caused ex­ten­sive bruis­ing along their sides and in­ter­nal hem­or­rhag­ing.

A third died af­ter be­com­ing snarled in fish­ing rope that wrapped around one flip­per and in­side its mouth.

She said the team of fed­eral fish­eries of­fi­cials, vet­eri­nar­i­ans and other marine ex­perts who were part of the necrop­sies in P.E.I. couldn’t yet say con­clu­sively what caused the deaths as they await re­sults from bi­o­log­i­cal test­ing on the an­i­mal’s tis­sue. Ex­perts are set to re­lease a fi­nal re­port within the next two months.

Still, Wim­mer said the in­for­ma­tion so far seems con­sis­tent with a col­li­sion with a ves­sel of some sort — one of the most lethal haz­ards for the en­dan­gered an­i­mals.

“The an­i­mal was ob­vi­ously struck by some­thing large, what it could be we don’t know,” she said in Halifax. “When we’ve seen that in the past, it has been on an­i­mals where there have been ves­sel col­li­sions, but for th­ese two we don’t know for a fact be­cause no one saw th­ese an­i­mals get­ting struck.”

The six North At­lantic right whales — among the most en­dan­gered large mam­mals on Earth — were found dead and de­com­pos­ing in wa­ters north of Prince Ed­ward Is­land and south­east of Que­bec’s Gaspe Penin­sula last month. It’s not clear whether necrop­sies will be done on the other an­i­mals since some may have dis­ap­peared.

Pierre-Yves Daoust of the At­lantic Ve­teri­nary Col­lege in P.E.I. led the necrop­sies and said they dis­cov­ered in­ter­nal hem­or­rhag­ing con­fined to the tho­racic cav­ity and some of the soft tis­sues.

“That sug­gests there may have been some ma­jor shear­ing forces that had rup­tured blood ves­sels and caused fa­tal in­ter­nal bleed­ing,” he said. “What we saw is con­sis­tent with blunt trauma and there­fore a ship strike ... but we can never com­pletely rule out the pos­si­bil­ity of some odd changes that may have hap­pened af­ter death.”

Still, he said the lack of a con­clu­sive cause of death shouldn’t pre­vent of­fi­cials from work­ing to pre­vent fu­ture ship strikes while in­ten­si­fy­ing the re­search be­ing done on the an­i­mals, which were hunted to the brink of ex­tinc­tion decades ago. The loss of six North At­lantic right whales rep­re­sents about one per cent of the es­ti­mated 525 en­dan­gered an­i­mals now in ex­is­tence.

“We can­not wait to have an­other half dozen right whales killed ei­ther this sum­mer or next sum­mer be­fore we start ad­dress­ing this po­ten­tial cause of mor­tal­ity,” he said.

CP PHOTO

Re­searchers ex­am­ine one of the six North At­lantic right whales that have died re­cently in the Gulf of St. Lawrence.

Newspapers in English

Newspapers from Canada

© PressReader. All rights reserved.