tripoloiding trout

[tallieho]

So i had a question for one of our gov.fishery bio's.What procedures are involved in creating.All Female 3n tripoloids.From what was explained to me there are 2 ways that it could be done.One way is inoculating the female brood stock at the hatchery.The other procedure is a change in there dietary supplements.I was shocked by these statements.With the cost of raising fish in the hatchery at apprx.$ 44.00 a kg,it would seem that this added procedure wouldn't cost much to implement.Consider this & this was from a very renowned biologist from .He stated at the seminar that 90% of the dipoloids planted lifespanis lessthan 2yrs.Where he told us when these same dipoloids are converted into the AF3N tripoloids the live for 7-up 11yrs.of age.It would seem to me,that it's a no brainer for the hatchery to not go the route of creating AF3N'S.They have simplyied the creation of tripoloiding trout where the eggs are just given a pressure treatment.So what gives?..Do we have to get up our dander & all start demanding that the gov't make better use of our resources.In all fairness the gov't has explored the 3n tripoloids.But science from our neighboring prov.has documented prove .That growth/lifespan of the fish are dramatically improved by creating a AF3N vs a 3n....

[Bhflyfisher]

Originally Posted by tallieho

So i had a question for one of our gov.fishery bio's.What procedures are involved in creating.All Female 3n tripoloids.From what was explained to me there are 2 ways that it could be done.One way is inoculating the female brood stock at the hatchery.The other procedure is a change in there dietary supplements.I was shocked by these statements.With the cost of raising fish in the hatchery at apprx.$ 44.00 a kg,it would seem that this added procedure wouldn't cost much to implement.Consider this & this was from a very renowned biologist from .He stated at the seminar that 90% of the dipoloids planted lifespanis lessthan 2yrs.Where he told us when these same dipoloids are converted into the AF3N tripoloids the live for 7-up 11yrs.of age.It would seem to me,that it's a no brainer for the hatchery to not go the route of creating AF3N'S.They have simplyied the creation of tripoloiding trout where the eggs are just given a pressure treatment.So what gives?..Do we have to get up our dander & all start demanding that the gov't make better use of our resources.In all fairness the gov't has explored the 3n tripoloids.But science from our neighboring prov.has documented prove .That growth/lifespan of the fish are dramatically improved by creating a AF3N vs a 3n....

umm.. you may want to look at stocking reports. The majority of lakes arent stocked with diploids anymore. Almost all triploids in alberta, just not AF3n, regular 3n fish meaning some males mixed in. Even being triploids, males will exhibit spawning colors even though they have no means to reproduce anyways.

[tallieho]

yes i did take note of the stocking report.The 3n's as you have stayed do in fact develop coloring,etc.What the bio's in B.C have discovered is that if you have the tank full of females,you change there diet or inoculate.They then become All Female Tripoloids.They donot develop any traits related to spawning colors,or kype jaws etc.All of those efforts,are gone.The AF3N'S just grow big.3N's still waste potential growth rates,still trying to develop spawning activities.Af3n's stocked recently in a mountain lake that winterkilled.Went from a stocking size of 6" in april to reach 211/2"by october of the same yr.Example Bullshead 6" stocked in the april stocking 2010 still haven't reached 20".....My point is the science is there,these fish are already separated by sex,why not try it..

[Bhflyfisher]

Originally Posted by tallieho

yes i did take note of the stocking report.The 3n's as you have stayed do in fact develop coloring,etc.What the bio's in B.C have discovered is that if you have the tank full of females,you change there diet or inoculate.They then become All Female Tripoloids.They donot develop any traits related to spawning colors,or kype jaws etc.All of those efforts,are gone.The AF3N'S just grow big.3N's still waste potential growth rates,still trying to develop spawning activities.Af3n's stocked recently in a mountain lake that winterkilled.Went from a stocking size of 6" in april to reach 211/2"by october of the same yr.Example Bullshead 6" stocked in the april stocking 2010 still haven't reached 20".....My point is the science is there,these fish are already separated by sex,why not try it..

There are so many variables involved in growth of all trout. Not all lakes are the same, so one cant just assume that every AF3n is going to grow 15" over 7 months.

But i agree with you on the fact that Alberta should be stocking more AF3n's. I'd like for alberta to completely change the strain of fish they stock. But they wont for many years to come, so i'll just have to head west.... or east.

[pikergolf]

The plan for BH next year is all female, not sure if trip. or dip.

Went from a stocking size of 6" in april to reach 211/2"by october of the same yr.
I have a tough time believing a fish in a wild mountain setting can grow 15" in 7 months, never mind, I don't believe it.

[Bhflyfisher]

Originally Posted by pikergolf

The plan for BH next year is all female, not sure if trip. or dip.

Went from a stocking size of 6" in april to reach 211/2"by october of the same yr.
I have a tough time believing a fish in a wild mountain setting can grow 15" in 7 months, never mind, I don't believe it.

ive witnessed going from 8" to 20" in a full year, but not 15" in 7 months. that absurd.

[tallieho]

Originally Posted by pikergolf

The plan for BH next year is all female, not sure if trip. or dip.

Went from a stocking size of 6" in april to reach 211/2"by october of the same yr.
I have a tough time believing a fish in a wild mountain setting can grow 15" in 7 months, never mind, I don't believe it.

[PIKERGOLF]Wouldn't it be great if they took some eggs outa some wild bow river females,tripoloid them.now wouldn't that be something hey..brings back memerories of those crawling valley bow's.[B].the retired biologist from B.C made the claim at a seminar this spring.seems that when they have a lake that w/kills they restock it quickly.so as not to lose interest in the lake.they stock it with a wild strain known as fraser valley river strain.they grow quickly & it's keeps people coming back to the lake.

[keep6matt]

Instead of spending so much $$ on restocking lakes that winter kill almost every year why don't they install an aerator system and balance the costs of installing them with reducing the stocked numbers or increase the license by $10 to level out the costs of installing aerators. Makes sense to me and you wouldn't have an argument from me to pay more for a licence for providing a way for the trout stocked lakes to survive the winter months. Aerators work and save many fish for us anglers to enjoy catching, such a heart breaker to see a shoreline littered with dead fish because of low oxygen levels. My two cents...didn't mean to derail the OP.....