Clam gardens have been used by Pacific Northwest native tribes for thousands of years. They build rock walls to trap sediment, at the right height to be immersed at high tide but also exposed for harvest at low tide. This encourages burrowing clams to settle in great densities. In some regions, like British Columbia, clam gardens covered over a third of the coast, creating over 100,000 m2 of habitat used also by countless other animals that eat clams. An example of the win-win-win solutions that native peoples have invented, and why Traditional Ecological Knowledge is crucial to effective marine conservation! #clamFacts
@dantheclamman That's so neat. When people live within the limits of the natural environment, we build up a deep knowledge of those environments.
Clam Facts are the best facts.
@dantheclamman
now I can't help but wonder if the real octopus's garden was actually meant for raising clams ...
@dantheclamman What I do not understand from just looking at the graphic is: Why do the clams like to linger more on the less steep new beach? Or did the natives change anything other than the steepness of the beach?
@dantheclamman It makes sense, if you know the substrate that butter and littleneck clams thrive in, and of course they did know, it shouldn’t be hard with some collective work to improve marginal habitats to productive ones. On the Salish Sea here a lot of habitat was already productive. But I think the focus was to improve habitat where the gradient wasn’t productive. It’ll be interesting to see the results of the work by the Swinomish.
So their solution for wild animals poaching their livestock was just to have enough livestock for everyone. Seems sensible.
Also, I bet some of those clam thieves were themselves quite tasty.
@dantheclamman Its important to note how humans can enhance the biosphère when we decide to live within nature.
We can also be s fuc*ing virus for the planet, but its not our nature as ecofascists would have you believe.
Its s choice.
@dacig yes, humans can enrich the environment. We have the technology and the means, if we just pay attention.
@dantheclamman @dacig this reminds me of OSU's Andrew Millison's video about Hawaiian Ahupua'a
https://www.youtube.com/live/KPd49MH9VeU?si=4uBWLpdY1HoeFRQm
@camless @dantheclamman We had chinampss in Tenochtitlán, still some left, one of the most productive agricultural systems ever.
The Amazon may be the forest that it is because of human management...
@dantheclamman @dacig in my own small way this is very relatable.
I went, multiple years, for more than 15 years to this one small area of muddy, sandy pea gravel in an otherwise very busy clamming bed.
I dug exclusively for my target clams, butters, and avoided cockles. I reburied my undersized in the proper depth and orientation. I did not brag about my catch or share my knowledge widely. I cared about the resource and my future success.
@dantheclamman @dacig this area had underlying bed rock. The depressions that the clams were in had various but limited sediment depth. If someone came and dug out a hole and didn't put the sediment back, and took every clam, that pocket was done for 5 years or more before it could recover.
People thought I was unfriendly because I did not openly share my "luck". But I tended my spot like a human would, not a tourist, and sometimes spent an extra 1/2 hour filling in other peoples' holes.
@dantheclamman @dacig I very purposely did not talk to people who approached me, because they viewed what I did as random luck and the resource as requiring no maintenance. Sometimes I found pockets that were devastated. Dead clams, broken shells. A pocket of gravel that is now too shallow to support growth, while the clams under the next pocket where they dumped the sediment have suffocated.
Theoretically the clams will always make a come back, but this spot was the one I could access readily.
@dantheclamman @dacig it required maintenance to continue to be productive. If a human was going to harvest here, it required human care to recover.
I planned on continuing this into my old age.
There is, of course, a tragedy here. Butters hold onto paralytic shellfish toxin for as long as a year. It was discovered in that species. The area of the coast I can get too has had significant warming, and a significant toxin out break every year for the past 3 years.
@dantheclamman @dacig the state I live in doesn't even test bay clams anymore. And they almost never tested butters. But if mussels or razor clams have been closed near my bay, in the last year, the butters are probably still holding the toxin, longer than any other.
So other people got me anyway, through global warming. Unsustainable excess, imagining no consequences.
I have been poor my whole life. I was legit counting on that protein and my expertise to help me through my retirement.
@dantheclamman @dacig oh. And the cockles have run out for most people too.
@dantheclamman another story, just for you, but written so anyone can share it.
How on Earth did they run out of cockles? Cockles are a fairly mobile clam. They hide an enormous foot in their shell, have almost no 'neck' (siphon), and are found either just barely buried in the sand and mud, or they are on the surface on their side. The later is because they use this enormous foot to push themselves around when they feel conditions are not perfect.
@dantheclamman I have followed a 15 foot trail on a mud flat leading up to the cockle who made it. And I have seen this foot extended as a clam tried to push its way out of a bucket. It can extend to 3 times the width of the shell.
They should be able to repopulate themselves on this clamming bed fairly rapidly. Cockles feeling crowded in deeper water could push themselves to shallower water and rebury themselves.
Places humans can't access should be able to repopulate places where they can.
@dantheclamman well, good sized butter clams, my favorite, are a fairly low tide event. -1 ft at least.
Tides on days of -.6 are clamable, but poor. And those days are more common. I realized that our ancestors (I'm white, but we all had ancestors) would have adapted their hunting technique to what was accessible.
So I looked at the tools available, bought a clamming rake with a built in basket, took my waders, and started clamming on marginal low tide days for cockles. Wading and digging.
@dantheclamman standing in 3 feet of water with waders and a digging rake is something that is harder to hide than tending a particular patch of gravel with a shovel. And my clamming bag, hanging around my waist, showed other people the number (20 is the local limit) and size of what I was getting. And I was digging in deeper water than the people just surface gathering at lowest tides could reach.
So I was doing really well, well above average, and it created a lot of imitators.
@dantheclamman so clamming rakes with a basket, for digging and scooping cockles from well underwater, became a trend. Gear that was recommended at the local sporting goods store. In a year they were up to $65.
Other people started wading and hitting the cockles hard, in groups of 4 people or more, and they were not gathering on marginal tides. On the deepest tides they were still wading and raking cockles out of the eel grass, where cockles like to snuggle up against the roots.
@dantheclamman so, the wadder people were harvesting cockles in deeper water, & digging up the eel grass, in unsustainable numbers. It spread as a Facebook trend, bragging. I saw 20 or more people doing it on tides where I was focusing on butter clams.
And after 3 years, the local population of cockles collapsed. I couldn't even fill a 20 cockle limit on a -1 foot tide.
I'm sure it will recover. But the number of clammers also collapsed, & I hope the city doesn't close & sell the parking lot.
@Urban_Hermit @dantheclamman Cities don't usually work that fast ;) Hopefully this is not an exception.
@dantheclamman the local property owners would like that, not having to share their street.
And when I said 20 or more, I mean I counted as many as 60 people wadding and hitting this clamming bed hard. Cars backed up on the road, parked like idiots.
I could not be considered responsible, personally. The tools I used already existed. I bought mine. Most people just didn't know what they were for and used them poorly if they had them.
We live in an era of 'how to' YouTube videos and trends.
@dantheclamman when people do not earn their experience the hard way, they rarely take the time to consider sustainability.
The eel grass is making a comeback.
@Urban_Hermit @dantheclamman
Clamming was banned in many places on the East coast of the US because of pollution from raw sewage ~65 years ago. It has been cleaned up & is legal again, except when it’s not.
https://www.greenwichct.gov/DocumentCenter/View/27327/Shellfish-Regulations-2021-2022
@dantheclamman I love clam facts time