Tag Archives: haulouts

Walrus mass haulout hype refuted, the video

Produced by the Global Warming Policy Foundation, there is now a short video summary of my recently-released GWPF briefing paper, which I wrote and narrated.

Walrus fuss_GWPF video Crockford

Watch it below:

Available also at GWPF TV“The Walrus Fuss – Walrus haulouts are nothing new.”

The briefing paper is here.

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Walrus and sea ice, a summary

I’ve written a briefing paper for the GWPF refuting claims that huge herds of Pacific walruses hauled out on land are a sign of global warming.

Here’s the GWPF press release:

London, 20 October: A briefing paper published today by the Global Warming Policy Foundation refutes claims that Arctic walruses are in distress and danger due to global warming.

The paper, written by Canadian zoologist Dr Susan Crockford, assesses the recent mass haulouts of walrus females and calves on the beaches of Alaska and Russia bordering the Chukchi Sea. The events have been blamed by US government biologists and WWF activists on lack of summer sea ice, amplified into alarming scare stories by news media around the world.

Such claims ignore previous haulouts that suggest a different cause. Scientific reports about large walrus haulouts that have occurred repeatedly over the last 45 years show that they are not new phenomena for this region.

At least two documented incidents of similar magnitude have occurred in the recent past: one in 1978, on eastern St. Lawrence Island and the other in 1972, on the western end of Wrangel Island. The 1978 event involved an estimated total of almost 150,000 walrus hauled out within in a small geographic area.

Moreover, sea ice maps for the months when known mass haulouts occurred, compared to years when they did not, suggest no strong correlation with low sea ice levels.

“The WWF and American walrus biologists have categorically linked the Point Lay mass haulout event to global warming, but available evidence suggests that’s alarmist nonsense,” Dr Crockford said.

“Blaming lack of sea ice for recent events ignores the documented factor – large population size – that drove walruses onto beaches en masse in the past, when plenty of ice was available. Conservation measures have almost certainly led to a spectacular recovery of walrus numbers over the last few years. This suggests that recent mass haulouts are more an indicator that Chukchi walrus are nearing maximum capacity than a sign of impending global warming catastrophe,” Dr Crockford added.

Here’s the paper. [Link fixed, h/t HO]

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Where have all the walrus gone?

Yes, I wondered too. After all the kerfuffle at the beginning of the month there’s been rather dead silence [see my last post here]. So I Googled and found some tidbits.

Chukchi Sea walrus, June 2014. US Fish and Wildlife Service.

Chukchi Sea walrus, June 2014. US Fish and Wildlife Service.

An article a few days ago at one media outlet (October 8, 2014) asked someone from the WWF what happened to the ~35,000 females and calves onshore near Point Lay, Alaska — because really, who else would you ask? Or, perhaps more to the point, would anyone at USGS be expected to answer?

And one online media outlet found walrus specialists in Alaska unwilling to lay all the blame for the recent massive haulout at Point Lay at the feet of low Arctic ice levels due to global warming. See what you think.

UPDATE added below October 13, 2014
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Mass haulouts of female Pacific walrus as a sign of population health

Mass haulouts of female Pacific walrus and their calves in fall don’t happen all the time but they do occur. I recently pointed out (here and here) two instances of such incidents from the 1970s.

I said this provided evidence that the September 2014 incident reported in the media was not “a new phenomenon” for this region, as WWF spokepersons and Alaskan biologists have claimed (reiterated in this PBS interview).

Figure 1. Walrus females and calves hauled out on a beach in Svalbard, photo accompanying an October 6, 2014 news report in “Eye on the Arctic” of the rapidly increasing Atlantic walrus population there. (Photo: Thomas Nilsen/Barents Observer).

Figure 1. Walrus females and calves hauled out on a beach in Svalbard, photo accompanying an October 6, 2014 news report in “Eye on the Arctic” of the rapidly increasing Atlantic walrus population there. (Photo: Thomas Nilsen, Barents Observer).

One aspect of the recent occurrence of a large herd on an Alaskan beach that apparently needs reiterating is that the population of walruses declined rather markedly after a 1970s peak and has rebounded since. This suggests that huge herds of females and calves hauling out on beaches in the fall to feed might only be seen when the population is very large.
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High walrus numbers may explain why females and calves are hauling out in droves

Are the recent mass gatherings of females and calves on the beaches of western Alaska and the Russian Far East a sign that population are again close to the limit the habitat can support, as they were in the 1970s?

At the risk of belabouring the point that lack of sea ice does not seem to be a reasonable explanation for this phenomenon (see my last two posts, here and here, and Andrew Montford’s excellent additions here), I think this is a possibility that needs to be considered.

Walruses at Point Lay Sept 27 2014 NOAA CMDA0007_sm

2014 Point Lay, NOAA photo

Walrus are well protected in the US and Russia, and population numbers have risen again since the 1990s, after significant declines in the early 1900s and again in the 1980s.

A paper from the late 1980s suggests that a return to high population numbers may be a more plausible cause for mass gatherings of females and calves that lead to stampede deaths than does reduced sea ice due to global warming.

Have a look and see what you think. It may not be the only reason but it may be a major contributing factor.

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