Because the beaver isn't just an animal; it's an ecosystem!

Month: October 2020



63 respondents to the survey so far and I had to bite the bullet and pay for the privelidge of knowing results for more than 40. Note to self: Free things are expensive. But if it helps get this off the ground it’s worth it, right?

All in all I’m feeling pretty encouraged by the response. I’m guessing if you can get 200 people to respond to a survey you might be able to get 5o people to sign up for a conference?

Meanwhile there’s been some fine writing on the beaver front, starting with this excerpt from Stephen R, Brown’s new book about mistakes in beaver writing, one of our favorite topics.

Tall beaver tales show a vital animal in Canada’s history was also misunderstood

In this excerpt from “The Company: The Rise and Fall of the Hudson’s Bay Empire,” the author discusses what else but the beaver, so vital for the early founding of the Hudson’s Bay Co. It seems the rodent’s importance paled in comparison to its reputation.

The Jesuit priest Father Le Jeune wrote in 1634 that the Montagnais “say that (beaver) is the animal well-beloved by the French, English and Basques, in a word, by the Europeans.” When he was a guest travelling in their country, Le Jeune “heard my host say one day, jokingly, ‘The Beaver does everything perfectly well, it makes kettles, hatchets, swords, knives, bread; and, in short, it makes everything.’

He probably thought he was joking at the time, but given the ecosystem services the beaver provides, we know better now.

Beavers were important animals in the cultural and spiritual traditions of many Indigenous peoples of North America, a source of metaphorical symbolism. In some mythologies they could represent perseverance or hard work and productivity, but also stubbornness. Beavers could be represented as the shapers of the world, a nod to their transformative landscape redesign. Conversely, they could be viewed as selfish for continuously building dams and flooding places without consulting other animals.

Yes those SELFISH beavers. Storing water, providing more nutrients for fish, frogs and otters. Just where do they get off anyway?

Beavers could occupy symbolic positions in the cosmology and were often used as allegory, the classic example being the Woman Who Married a Beaver, an Ojibwa (Anishinaabe) story in which a woman leaves her people and goes to dwell with her husband, a beaver, only returning to visit her human family periodically. They have children, and the husband and offspring, who also occasionally visit the human world, are killed by hunters but return alive to the beaver world each time with gifts of tobacco and needles and other trade goods.

Only upon the beaver-husband’s death in the beaver world do the woman and her children return to the human world, bringing with them an important message: always honour the beaver and never discredit or slander them on pain of bringing down a curse of poor fortune at hunting.

Well of course. Obviously. Everybody knows that.

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Written accounts of beavers had them dwelling in sprawling communal house-villages, speaking to each other and working in organized groups to secure food and build their dome-like dwellings. Some writers claimed that they had social stratification, including the use of beaver- slaves to speed the construction. One early 18th-century observer, Pierre-François-Xavier de Charlevoix, mused that “there are sometimes three or four hundred of them in one place, forming a town which might properly enough be called a little Venice.”

Gosh I want to go, don’t you? Actually American writer James Fenimore Cooper said a similar thing in “Last of the Mohicans“. Either it really happened or lots of people in different places convinced themselves it happened. When you look at the huge beaver dam in Alberta that was built by multiple generations of many families working together, it seems a little less foolish.

In his classic “Journey to the Northern Ocean” he wrote: “I cannot refrain from smiling when I read the accounts of different authors who have written on the economy of those animals, as there seems to be a contest between them, who shall most exceed in fiction … Little remains to be added beside a vocabulary of their language, a code of their laws, and a sketch of their religion.”

Hearne also addressed the claim that the beaver’s tail was actually a natural trowel used in the construction of their apartments or for plastering the inner walls. “It would be as impossible for a beaver to use its tail as a trowel,” he wrote, “ … as it would have been for Sir James Thornhill to have painted the dome of St. Paul’s Cathedral without the assistance of scaffolding.”

Now that’s pretty darn interesting. A scoffer of beaver lore before me. I might need to check out what Mr. Thornill has to say.

Since ancient times in the Mediterranean, castoreum was variously deployed by physicians as a cure for epilepsy, to induce abortions and to assuage the ravages of tuberculosis. It also had other properties that were suitable to a difficult-to-obtain and expensive medicinal ingredient: it could cure dementia, toothaches and gout as well as relieve headaches and fevers. (Castoreum does contain salicylic acid, the main ingredient in Aspirin, so this last was probably an accurate claim.)

Um I don’t know if aspirin can do all that, but it has its benefits surely.

That such a gentle and innocuous creature should inspire such artistic liberty seems unusual, but the money to be had from processing their pelts and castoreum was also unusual. Whether there was any empirical evidence justifying the value of castoreum is open to question. But when has fashion had anything to do with science or proof? Or even common sense? The hunt for beavers was beginning the economic transformation of a continent.

Ominous. And True. I was just reminded that there were harder times to save beavers than now. Currently we are just encouraging people to be slightly inconvenienced. 200 years ago it would have meant talking people out of their economy, their country, their freedom, their future.

 


Well so far 20 respondents think a California beaver summit is a good idea. Here’s a look at what interests folks:

More people are interested in stream restoration than I suspected, If you haven’t taken it yet please do add your voice to the mix. It’s pretty good information to know. And just in time because in a happy accident of fate,Thursday one of the top ten podcasts on Apple released fine discussion of our favorite superhero.

I listened to the entire thing yesterday and even though they are nobody’s idea of  a biologist it’s surprising accurate. Enjoy!


Yesterday I had the most mind-blowing conversation with Jackie Van Der Hout, the education and outreach director of CUSP (California Urban Streams Partnership). They are a wildly successful organization that is very interested in beavers, and wanted to take on my crazy idea. Jackie had great ideas for the beaver conference and took notes about my ramblings in a way that made it seem like I had great ideas too. I staggered away from the consult feeling excited, energized and more than a little overwhelmed.

Then I played around with Survey Money looking for the best way to get input from possible attendees without spending any actual money. This is what I came up with so far. The California Beaver Summit needs YOU. Click the image at the left to give feedback about your interest in the project. It will help a great deal to hear from you about the idea.

Part of planning something like this is thinking about who its for and what the goals area. I mean do we want biologists, stream-keepers, engineers or teachers to attend? Or all of the above? And what is the best way to package a conference like that? All in one fell swoop or in little chunks like brown bag meeting? Knowing who to speak and how to get them involved is the easy part for me, everything else is new territory.

Something tells me things are about to get very interesting.

 


Everyone has been thinking more about the desert beavers, as we get ready for the NM Summit. Apparently it grew out of advocates wish for Game and Fish to adopt a beaver management plan like Utah’s. Of course not ALL of Utah gets the idea. Some of the regions are still chugging along without a single beaverclue.

Beavers in the Desert? The Potential for Translocated Beavers to Serve as Restoration Tools in Desert Rivers

The USGS Utah Cooperative Fish and Wildlife Research Unit at Utah State University (USU) is partnering with the Ecology Center (USU), the Bureau of Land Management, the Bureau of Reclamation, Utah Division of Wildlife Resources, and U.S. Department of Agriculture-National Wildlife Research Center to evaluate the efficacy of beaver translocation for desert river restoration by comparing the fates, space use, and dam building activity of naturally occurring and translocated beavers in the Price and San Rafael Rivers in eastern Utah.

Beaver translocation is an alternative solution to lethal control that is gaining popularity. Beavers are taken from a conflict situation and translocated to a targeted area with the goal of harnessing their dams as a passive, cost-effective, and natural method of restoration. The challenge of translocation is getting beavers to stay, survive, and build dams in a specific area. Success of beaver translocation projects varies widely and lacks standardized best practices; failures are typically undocumented, and the cause of failure is often unknown.

Well it’s known by the beaver I dare say, but I guess that’s not what you mean.

So far, nine naturally occurring beavers have been captured and monitored, seven adult residents and two subadults, while 31 nuisance beavers have been translocated to the rivers, 18 adults and 13 subadults. All individuals were fitted with a tail-mounted radio-transmitter and a PIT- (passive integrated transponder) tag for post-release monitoring. Most (65%) of the translocated beavers have unknown fate, from radio-transmitter failure or individuals leaving the targeted restoration areas, while only 33% of resident beavers had unknown fate. Translocated beavers also experienced proportionally higher mortality (19% vs. 11%), primarily due to predation or exposure during drought. The only mortality of a naturally occurring beaver was a dispersing subadult, preyed upon by a mountain lion.

The researchers calculated the farthest straight-line distance an individual was detected from its release location to compare space use between resident and translocated beavers. Resident adult beavers exhibited an average maximum displacement of 0.58 km2 and dispersing subadult beavers had an average of 42.76 km2. Translocated adult beavers had an average maximum displacement of 79.13 km2 and translocated subadult beavers had an average of 67.74 km2.

Hmm I guess that means the relocaters got their release sight an average of 25 km wrong?

In this study, it appears that translocated beavers have not directly contributed to restoration efforts by building dams, likely due to their higher mortality rates and larger space use, spending more time traveling and exploring than remaining in an area and using their energy to construct a dam. This is similar to the behavior of dispersing subadults as they search for a new territory to establish. However, given the behavior of the translocated beavers and the wood-limited systems they were translocated into, the outcome likely would have been different if translocations were accompanied by the construction of structural features such as beaver dam analogues.

Yes it is very hard to build a maintain a dam when you’re dead. New research has shed light on the confounding effect of mortality. The researchers will remember not to overlook that fact next time? That’s encouraging.

This study also highlights the importance of post-release monitoring. If no monitoring of individual movements and behaviors were taking place, it may be falsely assumed that translocated beavers built the newly observed dams. Other studies have had varying success with translocation, but perhaps the initial results are an indicator that harsher, arid systems are more difficult for translocated beavers to establish. This could be due to poorer habitat quality, with the best habitat already occupied by naturally occurring beavers.

Those pesky beavers. We sprinkle them like table salt into dry areas and they either crawl to water or die outright. Sheesh who do they think they are?

 


Yesterday I read in the Montana beaver newsletter that the Beaver Coalition has taken on responsibility for the beaver restoration guide book and will be making and releasing updates as needed.

 That’s pretty exciting and I am only modestly wounded that they didn’t ask us. But I guess an ex NOAA fisheries guy is a better man for the job.  They probably think I would say too many outrageously nice things about beavers. Which I would.

So, just shut up and keep letting us have those nice photos, Heidi. I think that’s what  they said.

Any way its good news that the guidebook can continue to reflect updated conditions and that it will stay a vital source for our times. And it’s great that Jakob and Rob are getting the respect they deserve. They do, after all, have the finest logo.

We are proud to be the new stewards of “The Beaver Restoration Guidebook,” a free, open-source guide to the best available science, restoration techniques, and management practices for partnering with beavers. Originally published in June 2015 with funding from the North Pacific Landscape Conservation Cooperative and housed since its publishing with the Oregon office of US Fish and Wildlife, this is a living document that has, and will continue to be revised, as our collective knowledge advances. 

Speaking of great ideas, our friend Ray Cirino of Ojai California proudly created a ‘beaver game’ for children to play at the three day Manadala Event near the library. Check out his explanation of how it works.

Isn’t that a cool idea? Can you imagine how easily you could incorporate some beaver ecology into that meadow? Say the children following the different paths of the species who come to the pond? I sent it to Amy and am hoping she gets inspired.

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