Lake Trout - expansion

[Anglinarcher]

Here is where it shows up.

https://dwrapps.utah.gov/fishstocking/Fish

Thanks, yep that link works.

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Would it be possible to find out if they were Triploid or natural. That seems to be a lot of spawning fish for a small reservoir like Causey.

I would be surprised if they planted anything other than triploid lake trout.

Is there such a thing as triploid Lake Trout? That's not an easy process if I understand it correctly. Triploid Rainbows have been produced, but not certain it works for all species.

The easier (cheaper) route is to stock hybrid Splake if breeding populations are a concern.

Actually the process of making a Triploid is very easy.  The viability of the survivors depends on a lot of factors but they are getting the process down on lots of species.  The Triploid is made by taking fresh eggs and fresh seaman and then mixing them, then immediately putting them in a pressure pot and raising the pressure to twice atmospheric pressure (time varies for species), then releasing the pressure. 

An alternate method, the one normally found in nature and the one originally used by biologist and managers, is to take the freshly mixed eggs and seaman and put them into warm water (depends on species and ....) for a period of time, then cool to normal.  This method often causes a lot of failures due to bacteria, etc., so it is not done so much anymore.  The hardest part is to convince people that "Triploid" is not some radiation accident and is actually normal and natural in some specific conditions in nature (see method 2 above).  The sterile fish are Triploid, which means no energy is sent to spawning, all goes to growth, and the populations are controlled.

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Just noticed on the DNR stocking report for 2020 so far... Lake Trout have been added to about a half dozen new lakes including; Causey Reservoir, Electric Lake, and Stateline Reservoir. Interesting.

Causey surprised me a bit... Lakers are serious predators... aren't the Kokanee self-sustaining there, or are they gone?

The Kokanee in Causey are self-sustaining, and maybe over producing.  Porcupine is an example of this as well, but far worse.  The size of Kokanee depends on the amount of food per fish, and the more fish, the less food there is to go around.  It is called the principle of Biomass.  

To get the fish size up, you need to get the numbers down, and Lake Trout can do that.  There are Browns, Splake, Tiger Trout, and a few Cutties and Bows, but they seem to be on the edge not being able to control the numbers, just like in porcupine.

Another reason for putting them in these lakes would be that people just like to catch the monster fish once in a while, and we all know how big Lakers can get.