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#547071 04/26/22 08:55 AM
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azteca #547080 04/26/22 11:03 AM
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I like how they are moving in and out of the cover provided by the leaf litter.

azteca #547085 04/26/22 12:19 PM
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Cool.

More explanation? Details?


John

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azteca #547088 04/26/22 01:10 PM
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Hello.

Tonight if it's not raining I'm going to try to put some in a glass jar, for those who have never seen Fairy shrimp and their funny way of swimming.
A+

azteca #547246 04/30/22 08:19 PM
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Fairy shrimp will not usually live in ponds with fish because the shrimp are way too easy for fish to eat all of them.


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azteca #547253 04/30/22 11:19 PM
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They are pretty interesting creatures nonetheless. They can clear a bloom in a few days and this seems particularly interesting use for them to improve water quality and produce food. Most species live for a 3 weeks or longer and so its a gravy train for any fish till they are gone. I think they are very interesting if an affordable source of cysts could be obtained. 24 grams/acre of cysts could yield for example more than 700 lbs/acre of shrimps if survival of shrimps were 70% to day 7 for example. If a person spend say $2 a gram for the cysts, the wet weight cost of the forage would be less than 7 cents a lb. With 14 days to finish them off, the average daily consumption could be 50 lbs/day. Maybe that consumption rate is too high and a small quantity is better. I imagine that panfish and minnows would just fill up on them. The goldilocks treatment would be where they were all consumed before dying of old age.

They are a very large creature considering what they are eating which includes very efficient filtration of bacteria, yeasts, phytoplankton, etc that are too small to observe without a microscope.

Last edited by jpsdad; 04/30/22 11:21 PM.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers


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azteca #547322 05/02/22 03:19 PM
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Hello.

Last night I saw that the females were full of eggs.

I will collect the eggs with this raft, for another pool.

https://ibb.co/T41CtPQ
https://ibb.co/3rYdXL8
https://ibb.co/mJp7SPX
A+

azteca #547523 05/05/22 09:09 PM
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Hello.

Females with eggs.

https://www.youtube.com/shorts/syVESXX9S5o

Raft with females to collect eggs.


A+

azteca #547544 05/06/22 12:40 PM
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Good video --- Most forum members have never seen fairly shrimp. What type of water habitat did you find the fairy shrimp??? I have only seen them in temporary usually woodland ponds.

Last edited by Bill Cody; 05/06/22 12:41 PM.

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Bill Cody #547555 05/06/22 04:41 PM
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Originally Posted by Bill Cody
Good video --- Most forum members have never seen fairly shrimp. What type of water habitat did you find the fairy shrimp??? I have only seen them in temporary usually woodland ponds.

Bill, I think that he probably found them in ephemeral pools as you have. The cysts usually need a drying period to be viable. They are temporary and live only a short time. They grow really fast however where they usually attain a high proportion of their maximum length in 6 to 14 days. Depending on the species the typical life span will range from 20 to 40 days (though for some species perhaps longer). So using something like this for a recreational pond would be a treatment where an optimum (unknown) weight of cysts would be hatched and seeded to the pond when the naupli are young. Species that mature in 7 days grow more than 3 fold each day provided there is sufficient food in the water. I figure the amount one wants to introduce is something along the lines of just enough to mostly clear a bloom by earliest adult maturity or no more than the fish could eat taking into account survival to the day of they begin producing cysts and their remaining life span. Cysts are the primary obstacle to using them, they are largely unavailable at prices that make sense for use in ponds for feeding fish.

They shorten the food chain considerably filtering microscopic foods and larger foods like zooplankton. Timing and goals for a fishery would be important. They compete directly against larval fish for food and their small size favors prey fish species. So they should be used with caution in ways that don't work against other goals.

Anyone who is interested in them can reach out to me about advice on growing them. A small cell only 40 sq ft would be enough to grow two one acre treatments with each cycle. I'll probably grow one cycle every year or two in the small cell I am planning.

Last edited by jpsdad; 05/06/22 04:44 PM.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers


azteca #547559 05/06/22 05:28 PM
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Hello.

Yes Mr.Cody, it is a Vernal pool in my wood.

Here is a Video of this Vernal pool where the Fairy shrimp are.



Hello,jpsdad, I am an autodidact but all these critters fascinate me.
A+

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azteca #547561 05/06/22 05:42 PM
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Azteca, is your pool natural or did you construct it to have all the interesting critters?

Last edited by jpsdad; 05/07/22 08:54 AM.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers


azteca #547574 05/07/22 09:16 AM
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Hello.

In the wood I have a lot of pool but it's the only one where there are shrimps, that's why I prepare another pool to put shrimp in.

The pool that we see in the video is natural but let's say that I helped it a little

When I discovered that there were shrimps, I did some research.

Every year there was very few shrimp, so I said to myself if the eggs need drought to hatch, the pool even when there is no water remains very humid and that in addition if there are 2 to 3 inches of leaves covering the eggs it will take a very dry summer for these eggs to hatch.

For a while I wondered what I could do to hatch more eggs.

I didn't want to put anything artificial, so I took some big flat rocks in the wood about 5 to 6 inches thick and on those rocks I saw cut about a 1/2 inch of hollow, then I deposited these rocks at different places in the pool.

It seems to work well, since there is an explosion of Fairy shrimp every year now.
A+

azteca #547579 05/07/22 11:21 AM
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Originally Posted by azteca
For a while I wondered what I could do to hatch more eggs.

I didn't want to put anything artificial, so I took some big flat rocks in the wood about 5 to 6 inches thick and on those rocks I saw cut about a 1/2 inch of hollow, then I deposited these rocks at different places in the pool.

It seems to work well, since there is an explosion of Fairy shrimp every year now.
A+

That was a great idea to "enhance" the habitat required for your Fairy shrimp reproduction without modifying the overall natural environment of the pool!

I really enjoy reading your PB postings since they are outside of the typical projects pursued by most people with ponds.

azteca #547595 05/07/22 07:04 PM
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Thank you Azteca. Pretty cool stuff I asked because I did notice rocks that seemed to be place to be part a small levee. But the idea to form a hollow in rocks above the leaf litter floor to assist with desiccation of the cysts ... well that is just brilliant.


It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers


azteca #547608 05/08/22 02:34 AM
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When I first built my pond I stocked my first FHM about 2 weeks after filling and it was at night. After releasing the minnows I was watching them swim off when I spotted something else. My first thought was a bullhead fry and then I realized it was ferry shrimp.
In the western 1/4 of Kansas we have very high numbers of Playas and they are of course dry most of the time except after a good rain (not often here) and most contain ferry shrimp. I've never tried to raise any but it's amazing that it can be dry for several years then get a good, heavy rain and the Playas are full of ferry shrimp in just a few days.

Last edited by Snipe; 05/08/22 02:35 AM.
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azteca #547632 05/09/22 07:32 AM
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Kenny, the cysts disperse by wind among other ways. The size of cysts is on the order of the size of pollen. A cyst is not an egg but an embryo in arrested development. The arrest occurs while still immersed in the inundation that hatched the parents. Some viable cysts don't hatch on the first inundation but on a subsequent one. This helps to reserve cysts when the pool/playa is not flooded for a sufficient length of time for shrimp to reach maturity and produce cysts.

I wonder which playa supplied the cyst that hatched your shrimp and how it made the passage (most likely wind). It is cool that you noticed it.

Last edited by jpsdad; 05/09/22 07:33 AM.

It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers


azteca #547643 05/09/22 11:46 AM
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I have a Playa about 500' east of my main pond.. Pretty sure that's the source.


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