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Joined: Mar 2005
Posts: 21,512 Likes: 270
Moderator Hall of Fame 2014 Lunker
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OP
Moderator Hall of Fame 2014 Lunker
Joined: Mar 2005
Posts: 21,512 Likes: 270 |
Bruce were these guys using your stuff ? - North American Journal of Aquaculture 2009; 71: 52-58 TECHNICAL NOTE Production Methods for Food-Sized Bluegills Charles E. Hicks* Cooperative Research, Lincoln University, Foster Hall, 904 Chestnut Street, Jefferson City, Missouri 65101, USA Mark R. Ellersieck University of Missouri, 307E Middlebush Hall, Columbia, Missouri 65211-6100, USA Cindy J. Borgwordt Cooperative Research, Lincoln University, Foster Hall, 904 Chestnut Street, Jefferson City, Missouri 65101, USA Abstract Growth of selected crosses (P1♀ × F1♂, F1♀ × P1♂, and F1♀ × F1♂) of Lincoln University bluegill stocks were evaluated. The purpose was to test the commercial potential for reaching marketable size (227–340 g) within 2 years in an indoor water-recycle system and grow-out in ponds. Pond hatched young-of-year bluegill were reared in a 12-tank (719 L/tank) indoor water-recycle system. Fish were fed to satiation three times daily. Fish were weighed and measured for total length (TL), for a 120-d growth trial. Initial mean fish weight and TL were 28.0 ± 15.8 g and 106 ± 16 mm, respectively. Final mean weight was 119.4 ± 54.9 g, and mean TL was 161 ± 19 mm. Crosses were significantly different (P ≤ 0.05). Initial female weight averaged 82.1 ± 32.5 g, and male weight averaged 158.6 ± 45.5 g. Feed conversion ratio was 1.26, and survival was 99.4%. Specific growth rate (SGR) averaged 1.21%/d with a mean length increase of 0.5 mm/d. Fish were then marked by specific crosses with colored visible implant elastromer tags. Fish were stocked in four 0.04-ha ponds (N = 600 fish/pond; density = 15,000 fish/ha) for 129 d. Final mean weight of fish in the pond study was 228.3 ± 71.7 g; mean TL was 200 ± 15 mm. Crosses were not significantly different from each other (P > 0.05). Sexual dimorphism was more pronounced after pond rearing; females averaged 175.4 ± 41.7 g and males averaged 284.0 ± 54.4 g. Results indicate bluegill grown in indoor recycle systems may reach target weights of 227–340 g within 2 years with the use of out-of-season spawning and selective breeding. Forty-eight percent reached or exceeded the minimum target weight (227–340 grams). This study also suggests that removing females could increase the number of fish reaching target weight by 33%.
Last edited by ewest; 09/01/09 09:50 AM.
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Joined: Aug 2004
Posts: 8,854 Likes: 1
Moderator Ambassador Field Correspondent Lunker
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Moderator Ambassador Field Correspondent Lunker
Joined: Aug 2004
Posts: 8,854 Likes: 1 |
Where did THIS come from?
Holding a redear sunfish is like running with scissors.
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Joined: Dec 2009
Posts: 6,692
Hall of Fame 2015 Lunker
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Hall of Fame 2015 Lunker
Joined: Dec 2009
Posts: 6,692 |
Late to the party I guess!
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Joined: Jan 2009
Posts: 28,596 Likes: 859
Moderator Ambassador Field Correspondent Lunker
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Moderator Ambassador Field Correspondent Lunker
Joined: Jan 2009
Posts: 28,596 Likes: 859 |
Bruce, I see you are doing some deep digging!
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Joined: Mar 2005
Posts: 21,512 Likes: 270
Moderator Hall of Fame 2014 Lunker
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OP
Moderator Hall of Fame 2014 Lunker
Joined: Mar 2005
Posts: 21,512 Likes: 270 |
American Fisheries Society North American Journal of Aquaculture 2009; 71: 52-58
Why ?
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Joined: Aug 2002
Posts: 20,043 Likes: 1
Hall of Fame Lunker
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Hall of Fame Lunker
Joined: Aug 2002
Posts: 20,043 Likes: 1 |
Late to the party I guess! University research is not the best springboard to move forward Why not? Those guys do some really good bluegill research. They've also crossed just about every sunfish there is with a bluegill to see what the results are.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.
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Joined: Mar 2005
Posts: 21,512 Likes: 270
Moderator Hall of Fame 2014 Lunker
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OP
Moderator Hall of Fame 2014 Lunker
Joined: Mar 2005
Posts: 21,512 Likes: 270 |
Most (my guess 90%) of the research that is written up is done by University guys and their Coop-Extension and State Fish & Wildlife counterparts (Coop-Ext is an outreach of Universities and is often done in conjunction with State F & W as a cooperative state agency) or the Fed equivalent (U S Fish and Wildlife).
A substantial part of that research is done through the Fisheries professional organization or its sub units with the American Fisheries Society.
Last edited by ewest; 12/24/12 08:38 AM.
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