FYI

[fishinwrench]

25 minutes ago, vernon said:

Can you say "Color Selector"?

Jimmy Houston's buddy.

 

Yep, wasted some time and money on that too.

I became a much more consistent finisher when I quit reading Bassmaster magazine, and stopped believing the baloney that fisheries biologists like to say.

 

[Johnsfolly]

Each fish species has a different set of environmental conditions to survive. Some fish like trout and walleye need higher levels of dissolved oxygen than bluegill or catfish. Cooler water holds more oxygen than warmer water, which is why trout are naturally found in spring fed streams and not shallow farm ponds. Cooler water is more dense than warmer water except when it is near freezing temperatures (why ice floats). Water is at its highest density at a temperature near 4 degrees Celsius or 39 to 40 deg F. When a lake stratifies during the summer the higher density colder water is at the bottom of the lake. As you all know the thermocline is that area that has the greatest difference in water temperature and also the greatest difference in water density and oxygen levels. In highly productive or eutrophic lakes due to high algal biomass dying off the cold water below the thermocline may have little or no dissolved oxygen. In lakes like that where the lower water become anoxic the fish can become compressed in the water column and more susceptible to a sudden change in DO concentrations. When the a highly anoxic lake turns over in the fall there are frequent fish kills, which has been noted on many lakes throughout the world for many decades. in many lakes that are not that highly productive, the bottom water does not go anoxic. In those lakes you'll find fish like lake trout, walleye, whitefish, etc. which are those species that require higher oxygen levels to survive. Because they require more oxygen and the water at or below the thermocline is dark, walleye are adapted to living and feeding in these low light areas (look at their eyes) and they will tend to stay in water where there is not too much light. Under daylight conditions a walleye is more likely to swim downward or at the same light level than it would be to swim up towards the light. If there was 15 feet of anoxic water right at the light intensity level that the walleye are comfortable they may have swum for a long time at 30 foot depth to get away from the anoxic water and died of hypoxia. Bluegill may be in those same waters and since they are not as light sensitive they might have swam upwards and able to get to better water.

There was a report on OAF last year that discussed a similar event in Beaver lake that caused a fish kill with stripers. There are also fewer chances of flooding events in the summer than in the spring or fall when the water is not stratified. There have been more flooding events in the last few summers than I can remember and may be the likely to cause of this sudden uptick in fish kills.

[vernon]

13 hours ago, Johnsfolly said:

Each fish species has a different set of environmental conditions to survive. Some fish like trout and walleye need higher levels of dissolved oxygen than bluegill or catfish. Cooler water holds more oxygen than warmer water, which is why trout are naturally found in spring fed streams and not shallow farm ponds. Cooler water is more dense than warmer water except when it is near freezing temperatures (why ice floats). Water is at its highest density at a temperature near 4 degrees Celsius or 39 to 40 deg F. When a lake stratifies during the summer the higher density colder water is at the bottom of the lake. As you all know the thermocline is that area that has the greatest difference in water temperature and also the greatest difference in water density and oxygen levels. In highly productive or eutrophic lakes due to high algal biomass dying off the cold water below the thermocline may have little or no dissolved oxygen. In lakes like that where the lower water become anoxic the fish can become compressed in the water column and more susceptible to a sudden change in DO concentrations. When the a highly anoxic lake turns over in the fall there are frequent fish kills, which has been noted on many lakes throughout the world for many decades. in many lakes that are not that highly productive, the bottom water does not go anoxic. In those lakes you'll find fish like lake trout, walleye, whitefish, etc. which are those species that require higher oxygen levels to survive. Because they require more oxygen and the water at or below the thermocline is dark, walleye are adapted to living and feeding in these low light areas (look at their eyes) and they will tend to stay in water where there is not too much light. Under daylight conditions a walleye is more likely to swim downward or at the same light level than it would be to swim up towards the light. If there was 15 feet of anoxic water right at the light intensity level that the walleye are comfortable they may have swum for a long time at 30 foot depth to get away from the anoxic water and died of hypoxia. Bluegill may be in those same waters and since they are not as light sensitive they might have swam upwards and able to get to better water.

There was a report on OAF last year that discussed a similar event in Beaver lake that caused a fish kill with stripers. There are also fewer chances of flooding events in the summer than in the spring or fall when the water is not stratified. There have been more flooding events in the last few summers than I can remember and may be the likely to cause of this sudden uptick in fish kills.

OK mister, I don't know about everybody else but if you ask me that all that makes WAY too much sense to even possibly be true!

I don't know if you're just trying to start trouble with all your fancy facts and logical reasoning but one thing I do know is that you're obviously way overqualified to participate in an otherwise perfectly fine spittin' contest.

Sometimes there's just no place for truth and facts and this is lookin' more and more like one of 'em.

Next thing you know you'll be trying to tell us the world is round or some other such nonsense...........

😉

[Johnsfolly]

8 minutes ago, vernon said:

OK mister, I don't know about everybody else but if you ask me that all that makes WAY too much sense to even possibly be true!

I don't know if you're just trying to start trouble with all your fancy facts and logical reasoning but one thing I do know is that you're obviously way overqualified to participate in an otherwise perfectly fine spittin' contest.

Sometimes there's just no place for truth and facts and this is lookin' more and more like one of 'em.

Next thing you know you'll be trying to tell us the world is round or some other such nonsense...........

😉

You got me figured out alright !

[fishinwrench]

Alright then, who's gonna be the first to buy a DO meter?  

 

You don't want to be wasting time fishing in water that doesn't have enough oxygen in it. 

[fishinwrench]

19 hours ago, Johnsfolly said:

Each fish species has a different set of environmental conditions to survive. Some fish like trout and walleye need higher levels of dissolved oxygen than bluegill or catfish. Cooler water holds more oxygen than warmer water, which is why trout are naturally found in spring fed streams and not shallow farm ponds. Cooler water is more dense than warmer water except when it is near freezing temperatures (why ice floats). Water is at its highest density at a temperature near 4 degrees Celsius or 39 to 40 deg F. When a lake stratifies during the summer the higher density colder water is at the bottom of the lake. As you all know the thermocline is that area that has the greatest difference in water temperature and also the greatest difference in water density and oxygen levels. In highly productive or eutrophic lakes due to high algal biomass dying off the cold water below the thermocline may have little or no dissolved oxygen. In lakes like that where the lower water become anoxic the fish can become compressed in the water column and more susceptible to a sudden change in DO concentrations. When the a highly anoxic lake turns over in the fall there are frequent fish kills, which has been noted on many lakes throughout the world for many decades. in many lakes that are not that highly productive, the bottom water does not go anoxic. In those lakes you'll find fish like lake trout, walleye, whitefish, etc. which are those species that require higher oxygen levels to survive. Because they require more oxygen and the water at or below the thermocline is dark, walleye are adapted to living and feeding in these low light areas (look at their eyes) and they will tend to stay in water where there is not too much light. Under daylight conditions a walleye is more likely to swim downward or at the same light level than it would be to swim up towards the light. If there was 15 feet of anoxic water right at the light intensity level that the walleye are comfortable they may have swum for a long time at 30 foot depth to get away from the anoxic water and died of hypoxia. Bluegill may be in those same waters and since they are not as light sensitive they might have swam upwards and able to get to better water.

There was a report on OAF last year that discussed a similar event in Beaver lake that caused a fish kill with stripers. There are also fewer chances of flooding events in the summer than in the spring or fall when the water is not stratified. There have been more flooding events in the last few summers than I can remember and may be the likely to cause of this sudden uptick in fish kills.

Does all of this not indicate that fish do sense "bad water"?    

[fishinwrench]

9 minutes ago, fishinwrench said:

Each fish species has a different set of environmental conditions to survive. Some fish like trout and walleye need higher levels of dissolved oxygen than bluegill or catfish.

I haven't looked very hard, but I can't find anything that supports this.  Not to the point of "fish kill" status.    Obviously gar can survive in oxygen depleated or stagnant water by gulping air from the surface.....but why would they want to since theoretically there's nothing for them to eat there?  

It does show, however, that the fish KNOWS that it needs a shot of oxygen. Otherwise they wouldn't know when it is time to go grab a gulp of air.

Can we get a chart that shows each fish's oxygen requirements ?    There's gotta be one out there somewhere.

[fishinwrench]

The mention of Gar brought up yet another question in my mind....  

I know of a half dozen areas (some shallow, some deep) that are ALWAYS thick with gar.  Spring-Summer- Fall- Winter the gar are always there by the hundreds.   What could it be about those spots that congregate and hold the gar there?

[bfishn]

7 hours ago, fishinwrench said:

Alright then, who's gonna be the first to buy a DO meter?  

 

You don't want to be wasting time fishing in water that doesn't have enough oxygen in it. 

That's a pretty good buy. I gave a little more than that for a used YSI analog model back in the early '90s. My primary use was at my trout farm and for live hauls, but I've used it plenty for fishing purposes too. Haven't used it since the AG&FC started posting temp/DO profiles online for the WR chain.

[fishinwrench]

4 minutes ago, bfishn said:

That's a pretty good buy. I gave a little more than that for my YSI analog model back in the early '90s. My primary use was at my trout farm and for live hauls, but I've used it plenty for fishing purposes too. Haven't used it since the AG&FC started posting temp/DO profiles online for the WR chain.

Well if you have a meter then surely you have the data that shows how much % of oxygen each fish requires, otherwise what's the point of having a meter?  Can you share it, please ?