B次元官网网址

Skip to content

Seals and sea lions may not be the scourge of the Salish Sea according to scientists

Biologists are divided on the cause of salmon decline
21665572_web1_200514-CRM-DFO-To-Decide-On-Seal-Fishery-Plan-SEALION_1
A decapitated sea lion found in Nanaimo. Both PBMM and animal rights groups have condemned the practice of letting the animals float. Photo supplied by Animal Alliance of Canada.

Rumours of overabundant seals decimating salmon stocks may be greatly exaggerated.

Photos of decapitated pinnipeds that were posted by a group proposing a seal and sea lion commercial fishery got the attention of scientists, conservation groups and animal rights groups. One of the groups, Animal Alliance of Canada, reached out to the Mirror to express their concern about the decapitations.

B次元官网网址淚t is ecologically a disaster for marine life and local ecosystems,B次元官网网址 said Animal AllianceB次元官网网址檚 west coast director Jordan Reichert. B次元官网网址淭he consequences would be far-reaching on different species such as the transient orcas that actually feed on seals and sea lions, and for other marine life that depend on that whole food chain system.B次元官网网址

The harvesting proposal is being made by Pacific Balance Marine Management (PBMM) and is before the DFO. PBMM posted the photos as a caution to other hunters, asking them to use better practices when hunting seals and sea lions.

RELATED:

PBMMB次元官网网址檚 president Tom Sewid belongs to the KwakwakaB次元官网网址檞akw First Nation. First Nations people already have permission to hunt seals and sea lions for cultural purposes, and he believes commercial licensing would build a market for pinniped (the name for four-finned marine mammals) products.

B次元官网网址淲e have the right to harvest, weB次元官网网址檝e always been harvesting since the beginning of creation to present. Since [the 1970s], weB次元官网网址檝e not been allowed to sell any part of the seal and sea lion. There has been no economic revenue generation through the seal and sea lion harvest. ThatB次元官网网址檚 what weB次元官网网址檙e submitting the marine management plan about,B次元官网网址 said Sewid.

One of the reasons for the proposed fishery is to stop a perceived overpopulation of the seals and sea lions which, according to Sewid, are one of the main causes of salmon depletion in the area.

However, scientists do not agree, even amongst themselves, whether the pinnipeds are the cause for salmon depletion. Dr. Andrew Trites is a professor for the Institute for Oceans and Fisheries and the director of the Marine Mammal Research Unit at UBC. He explained the two theories of salmon population decline. One theory, and PBMMB次元官网网址檚 basis for their application, is that predation by pinnipeds is the cause. The other theory is that the salmon are unable to grow to maturity because of the large numbers put into the ecosystem by hatcheries.

B次元官网网址淚n the end, there may well be a combination of both things at play here. It may not simply be one or the other,B次元官网网址 Trites said. B次元官网网址淲e have evidence that [the pinnipeds] do eat these fish, so they automatically become a suspect. You have to keep in mind that theyB次元官网网址檙e not the only things that eat salmon smolts. We know that birds eat them such as blue herons, terns eat them, cormorants love them.B次元官网网址

TritesB次元官网网址 research into the Salish Sea ecosystem shows that it is more complicated than a simple linear food chain. A number of animals prey on salmon, and the ocean cannot carry infinite amounts of fish. Other animals, like transient killer whales, are dependant on pinnipeds as their food source. Trites explained that the seal population has stabilized and that could be due to the return of transients to the Salish Sea.

B次元官网网址淚f you remove the seals, youB次元官网网址檙e removing the food of the transient killer whales,B次元官网网址 Trites said. B次元官网网址淲hatB次元官网网址檒l happen to the transients? Well weB次元官网网址檒l need to have a recovery plan. WeB次元官网网址檒l have to shut down something to help save them. ItB次元官网网址檚 not clear to me how well the public will respond to doing harm to killer whales.B次元官网网址

B次元官网网址淚f you were to go ahead and remove a large number of all the seals and sea lions and you end up being totally wrong, it would take 20 to 30 years for the system to recover,B次元官网网址 he added. B次元官网网址淵ouB次元官网网址檙e really rolling the dice of life here and potentially even changing the ecosystem in the process.B次元官网网址

The battle between fishers and marine mammals has a long history. People were allowed to hunt the animals until the 1970s, when pinnipeds were protected. Sewid and PBMM want to bring back the hunt, but to keep it in the hands of First Nations people, who he says have traditionally kept the pinniped numbers in check.

B次元官网网址淚tB次元官网网址檚 addressing how we would do it ethically, humanely, weB次元官网网址檝e identified the markets, we set up capacity training program for all hunters and First Nations to take so that we donB次元官网网址檛 have all the bloaters floating on the beaches as we do right now from poachers that are out there.B次元官网网址

The evidence does not support the idea that the pinniped population is exploding. Since the 1990s the numbers of pinnipeds have actually stabilized, thanks to a resurgence in transient orcas in the area.

B次元官网网址淭here are a few cases around the world where in the absence of humans, systems have come back to a natural state,B次元官网网址 Trites explained. B次元官网网址淚 wonder whether as people have stopped hunting and killing seals and sea lions, weB次元官网网址檙e seeing things come back and attaining a new natural balanceB次元官网网址. nature is well-tuned to take care of itself if given the chance.B次元官网网址

Higher seal populations may also be strengthening the populations of Chinook and Coho salmon.

B次元官网网址淲hen you think about the Serengeti, where lions are chasing down the gazelles, often theyB次元官网网址檙e catching the slow and sick individuals and we look at it being healthy for a population to have the inferior animals removed from it. We think the same thing may be happening with the seals,B次元官网网址 Trites added.

Sewid says PBMM is not advocating a cull. Members of PBMM were part of a similar group called Pacific Balance Pinniped Society, which was advocating for a derby-style cull of 50,000 in the first year, and 3,000-5,000 in years after. They split off in June 2019.

B次元官网网址淲e never proposed any cull. Cull is a dirty four-letter word, why would an Indian shoot and waste something?B次元官网网址 Sewid said. B次元官网网址淲e have nothing to do with [Pacific Balance Pinniped Society] nor do we support their process.B次元官网网址

Sewid filed a separate application for PBMM which DFO will assess by June.

DFO were unable to speak to the Mirror due to the ongoing nature of the application. Part of their process is to go over the data available and make a decision based on what is causing the salmon population depletion, which Trites says is difficult even for scientists.

B次元官网网址淪ometimes when people find a scientific theory that fits with their belief they look no further,B次元官网网址 he said. B次元官网网址淭he reality is that thereB次元官网网址檚 a huge division amongst the scientists, and thereB次元官网网址檚 no certainty at all about whatB次元官网网址檚 really wrong with the Chinook. WeB次元官网网址檝e got good theories and data, but the confidence that we really know whatB次元官网网址檚 going on and can take action to fix it is just not there.B次元官网网址

21665572_web1_200514-CRM-DFO-To-Decide-On-Seal-Fishery-Plan-SEWID2_1
Tom Sewid demonstrates some of the products made from seals and sea lions. Photo supplied by Tom Sewid.
21665572_web1_200514-CRM-DFO-To-Decide-On-Seal-Fishery-Plan-SEWID_1
Tom Sewid is the president of the Pacific Balance Marine Management group, who is pushing to establish a commercial pinniped fishery. Photo supplied by Tom Sewid.
21665572_web1_copy_200514-CRM-DFO-To-Decide-On-Seal-Fishery-Plan-SEWID_1


Marc Kitteringham

About the Author: Marc Kitteringham

I joined Black press in early 2020, writing about the environment, housing, local government and more.
Read more



(or

B次元官网网址

) document.head.appendChild(flippScript); window.flippxp = window.flippxp || {run: []}; window.flippxp.run.push(function() { window.flippxp.registerSlot("#flipp-ux-slot-ssdaw212", "Black Press Media Standard", 1281409, [312035]); }); }