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| Message Subject: Walleyes For Tomorrow Hatchery Update! | |||
RSR |
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Member Posts: 174 | I was asked to post updates of what our hatcheries are doing So I will be posting some of the numbers our hatcheries are producing this spring. Green Lake Chapter of Walleyes for Tomorrow Note; Walleye’s 26” and larger are to be released after documentation is completed, they are not to be stripped. NN is “Net Night”. Fyke Net Daily Data: 4-23-2016 - NN #1: 28 total walleyes: 4 of which exceeded 26”, another 4 were green. This leaves 20 walleyes, 11 of those were workable females and 9 were males. These fish produced 4 quarts of eggs, 2 jars, for a total in hatchery of 512’000 eggs, that’s an average of 46’546 eggs per female. One fish was a recap. 4-24-2016 – NN #2: 51 total walleyes: 5 of those exceeded 26”, another 5 were green. This leaves 41 walleyes, 15 of those were workable females, and 26 males. These fish produced 7.5 quarts of eggs, 4 jars, for the day’s total harvested of 960’000 eggs. Two NN total of 1’472’000 eggs, these females averaged 64’000 eggs per fish. One fish was a recap. 4-25-2016 – NN #3: 57 total walleyes: 3 of those exceeded 26”, another 8 were green. This leaves 46 walleyes, 16 of those were workable females and 30 males. These fish produced 12.5 quarts, 6 jars, for the days total harvested of 1’600’000 eggs, for a three NN total of 3’072’000 eggs. These females averaged 100’000 eggs per fish. Two fish were recaps. 4-26-2016 – NN #4: Fuel pump quit, could only work six of the ten nets. The six nets worked produced 33 total walleyes: 2 of those exceeded 26”, and 5 were green. This leaves 26 walleyes, 8 of those were workable females and 16 males. These fish produced 6 quarts of eggs, 3 jars, for the day’s total harvest of 768’000 eggs, for a four NN total of 3’840’000 eggs. These 8 females averaged 96’000 eggs per fish. Four fish were recaps. 4-27-2016 – NN #5: 60 total walleyes: 2 of those exceeded 26”, and 1 green. This leaves 57 walleyes, 30 of those were workable females and 26 males. These fish produced 16 quarts of eggs, 8 jars for the day’s total harvest of 2’048’000 eggs, for a 5 NN total of 5’888’000 eggs. These 30 females averaged 68’267 eggs per fish. Eight fish were recap’s. 4-28-2016 – NN #6: 30 total walleyes: 4 of those exceeded 26”, and 2 green. This leaves 24 walleyes, 15 of those were workable females and 10 males. These fish produced 8 quarts of eggs, 4 jars for the day’s total harvest of 1’024’000 eggs, for a 6 NN total of 6’912’000 eggs. These 14 females averaged 68’267 eggs per fish. Two fish were recap’s. 4-29-16 – NN #7: 22 total walleyes: 2 fish exceeded 26”. This leaves 20 walleyes, 13 of those were workable females and 7 males. These fish produced 8.5 quarts, 4 jars for the day’s total harvest of 1’088’000 eggs, and the 7th NN total of 8’000’000. These 13 females averaged 83’692 eggs per fish. Two fish were recap’s. Strong winds the afternoon and night of the 28th had four nets out of commission; they were re-stretched and ready for Saturday morning. 4-30-2016 – NN #8: 42 total walleyes: 2 exceeded 26” and 1 was green, this leaves 39 walleyes, 24 of those were workable females and 17 males. These fish produced 17 quarts of eggs, 8 jars for the days total harvested of 2’176’000 eggs, the 8th NN and final total harvested and fertilized eggs of 10’176’000 or 79.5 quarts. The 24 females averaged 90’667 eggs each. Three fish were recaps. All WFT nets were removed; the remaining DNR nets #10, 14 & 11 were re-stretched and left ready to fish. With 7 WFT nets and 3 DNR nets in 8 NN WFT volunteers captured and handled 323 total walleyes, 182 females of which 132 were workable females to 141 males. Each female averaged 77’091 eggs. We had 9 sub 15” walleyes and 20 recaptures. 24 walleyes exceeded the 26” mark with the largest fish 29” and the smallest 13.5”. | ||
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| RSR |
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Member Posts: 174 | Greetings to All, Green Lake has finished with egg harvesting on 4-30-16. With 7 WFT nets and 3 DNR nets in 8 NN Green Lake volunteers captured 323 total walleyes. 182 females of which 132 were workable fish to 141 males, each female averaged 77’091 eggs. We had 9 sub 15” and 20 recaptures, and we had 24 walleyes that exceeded the 26” mark and were released un-striped. The largest was 29” and the smallest was 13.5. Attached is a daily netting/hatchery log and hatching time-line calendar, we have a full hatchery at 79.5 quarts or 10’176’000 fertilized eggs! The week of May 15th should be wild! | ||
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| RSR |
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Member Posts: 174 | We stripped the eggs from 50 females. 17 were 26” or slightly larger size class 7 were 25” class 9 were 24” class 8 were 23” class 6 were 22” class 1 was 21” class 1 was 19” class 1 was 18” class We used a total of 82 males 7 males 14” class 17 males 15” class 8 males 16” class 25 males 17” class 22 males 18”class 3 males 19-20” class The current walleye harvest regulations on Geneva Lake allow a 5 fish harvest of walleye with a minimum length limit of 15”. As you can see from our data, there are very few males under 15” that we were able to use for fertilization. There may be a good biological argument to increase the minimum size to 18” before harvest. The increased size limit may make it easier for WFT to obtain the males we need for fertilization, and it may give the fish a chance to spawn once before being subject to harvest. The male walleye population is just getting to be more in balance on Geneva with more fish present. Soon the word will be out on the increased walleye population in the lake and the harvest is bound to increase. Geneva Lake is primarily a put-and-take walleye fishery. We can be sure of the taking part... but we can not be so sure who or how much “putting” there will be for the future. It would be nice to have a sustainable walleye population that people can enjoy a harvest from for some time. Brian H. Simon Walworth Co. Chapter Chairman Walleyes For Tomorrow | ||
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| RSR |
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Member Posts: 174 | Another Hatchery update for lake Geneva! Hello Everyone, Wanted to update everyone on the hatchery, its been a while-I’m sure your wondering.... After 34 days of hatchery operation, today was the last fry stocking event of the 2016 hatchery season. We incubated 6,220,000 walleye eggs at an average incubation temperature of 47.8 degrees. The incubation duration was 26-28 days. The hatch started at around 384 DTU’s. Each jar took about 5 days to completely hatch once they started. It was complete around 448 DTU’s. This is about 80 accumulated DTU’s more than when the eggs were incubated at 58 degree average temperature at our previous location. We stocked 4,130,000 fry over a period of 8 days of stocking, for a 66% hatch rate. We held the fry for 3 days post hatch before release, except when we had the last cold front this past Friday and Saturday, we had to hold them 4 days. When a check of the fry in the microscope showed their mouths open and plenty of yolk sac left, and they were up and swimming horizontally in the tanks, we let them go over the deep water where we had previously checked for adequate zooplankton. Overall, the operation of the hatchery on the lake proper, instead of the backwater of the lake, went smooth over the long period. The hatch was slow and more controllable. Overnight hatches were more of a steady trickle instead of the explosive hatch events we had experienced in the warm water of the Abbey Harbor. Egg shells did not give us trouble, it was the algae blooms and the strong and persistent northeast blowing across Geneva Bay right into our hatchery that caused us problems with plugged filters every 4 hours. This bloom would last about 1 day and then the water would then be crystal clear for several days or a week. One evening on a hatchery check, I found 3-4 inches of algae floating on top of the eggs in every jar. After siphoning and flushing the eggs/jars, all was back to normal. Today Jim Pierce, Bill Bearder and myself tore down the hatchery and we will be pulling out of there tomorrow morning. I believe this season was very successful, with the best hatching rate we have ever had, very healthy and well conditioned fry, and the lake food supply/fry introduction was “in sync” with each other using incubation water directly from the lake shore, where they naturally would have hatched and the date they would hatch. Congratulations to everyone who helped this season at the hatchery on the success, and to all that have been members of our chapter in stocking Geneva Lake with over 18 million walleye fry over the last 5 years. Now we need to finish up on our fundraising project, call it a season, and move on to other things. I will be in touch with updates as I get new news and information. Brian H. Simon Walworth County Chapter Chairman Walleyes For Tomorrow | ||
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