Free: Contests & Raffles.
There are a lot of variables that would make me hesitant to apply these results beyond the trout caught in the study. Great news that C&R trout do well though.
There is data, but the variables are obviously many and the handling of the fish itself different. I don't know off hand what mortality rate is applied for fish removed from the water. I do know that studies have demonstrated that higher temps and oxygen deprivation both raise mortality rate.The bigger issue is nearly all our fisheries are created by modeling the mortality of non-target fish. These limiting stocks are killed either by harvest or mortality after release. If the regulation to keep fish in the water goes away, the mortality rate applied to the fishery will go up. The season will be shortened because we'll use our "impacts" up quicker. If we want to continue mixed stock fisheries (which we do), we'll have to live with regulations intended to limit mortality on non-target stocks. The only other option is less fishing.
Quote from: WSU on January 31, 2019, 09:05:32 AMThere is data, but the variables are obviously many and the handling of the fish itself different. I don't know off hand what mortality rate is applied for fish removed from the water. I do know that studies have demonstrated that higher temps and oxygen deprivation both raise mortality rate.The bigger issue is nearly all our fisheries are created by modeling the mortality of non-target fish. These limiting stocks are killed either by harvest or mortality after release. If the regulation to keep fish in the water goes away, the mortality rate applied to the fishery will go up. The season will be shortened because we'll use our "impacts" up quicker. If we want to continue mixed stock fisheries (which we do), we'll have to live with regulations intended to limit mortality on non-target stocks. The only other option is less fishing.Based on what? I remain highly skeptical that given the sources of mortality for non-target fish - that even if one applied an increase to the recreational angler caught/holding fish out of the water for 30s...that it would amount to anything that would measurably reduce season length. I'm all for handling fish with care and protecting a limited resource...but I'm very unsympathetic to bureaucracies coming down on a kid holding an unclipped steelhead out of the Grande Ronde in February...and I believe this fourm has a thread describing that exact situation. One things for sure...I'm very thankful for the common sense leadership in Idaho Fish and Game.
Quote from: idahohuntr on January 31, 2019, 10:40:00 AMQuote from: WSU on January 31, 2019, 09:05:32 AMThere is data, but the variables are obviously many and the handling of the fish itself different. I don't know off hand what mortality rate is applied for fish removed from the water. I do know that studies have demonstrated that higher temps and oxygen deprivation both raise mortality rate.The bigger issue is nearly all our fisheries are created by modeling the mortality of non-target fish. These limiting stocks are killed either by harvest or mortality after release. If the regulation to keep fish in the water goes away, the mortality rate applied to the fishery will go up. The season will be shortened because we'll use our "impacts" up quicker. If we want to continue mixed stock fisheries (which we do), we'll have to live with regulations intended to limit mortality on non-target stocks. The only other option is less fishing.Based on what? I remain highly skeptical that given the sources of mortality for non-target fish - that even if one applied an increase to the recreational angler caught/holding fish out of the water for 30s...that it would amount to anything that would measurably reduce season length. I'm all for handling fish with care and protecting a limited resource...but I'm very unsympathetic to bureaucracies coming down on a kid holding an unclipped steelhead out of the Grande Ronde in February...and I believe this fourm has a thread describing that exact situation. One things for sure...I'm very thankful for the common sense leadership in Idaho Fish and Game.I'm sure it varies by fishery. The impact on the Ronde with relatively few anglers, relatively few encounters, cold water, and relatively hearty fish (having long since developed their slime layer and absorbed scales) is far different than every idiot from B10 to Idaho removing fish from the water from June to March. Those same fish face a lot of fishing in a lot of places. It ain't as simple as pointing to one kid holding a fish up on the Ronde that already made it through hundreds of miles of fishing. There are dozens of studies linking water temp, recovery, handling, etc. to mortality. Knock yourself out on google if you want, or go ahead and remain skeptical without doing the reading if you want. And the common sense leadership of Idaho doesn't want wild fish. Look no further than the hydropower projects and Idaho's opposition to fish passage so they don't have to manage for them. Idaho may be simple, but it certainly ain't fish friendly.