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Joined: Mar 2020
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Joined: Mar 2020
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Will fish that are stunted grow to a large size once the issues causing the stunting are resolved? Are they forever stunted and its their offspring that will grow large?
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Joined: May 2018
Posts: 1,882 Likes: 278
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Joined: May 2018
Posts: 1,882 Likes: 278 |
I have personally observed 8-10 inch LMB grow to 14" over winter when transplanted to a new pond with a stunted GSF population in the fall. They'll eat if they can and how fast they grow depends on how much they consume. They may have been 7 year old 8"-10" fish when they were transplanted. So obviously they might only have had 3 or 4 years left to grow. I can tell you they were obviously stunted when they went in with heads too large for their bodies. Following spring, their bodies were fat and the heads were well proportioned to the bodies.
In a setting with an existing population the resolution of conditions that lead to stunting is not easily resolved to allow LMB to grow large. But the size and condition of LMB can be greatly improved by harvesting LMB to reduce competition. Again, just like with the example above, they have to consume forage to grow and if there is sufficient forage they will grow according to that consumption.
It isn't what we don't know that gives us trouble, it's what we know that ain't so - Will Rogers
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Joined: Jan 2009
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Moderator Ambassador Field Correspondent Lunker
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Moderator Ambassador Field Correspondent Lunker
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Every day without enough calories is a day of growth lost. Can they grow large? Maybe but don't worry about it affecting their genetics if it's only a generation or so.
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Joined: May 2014
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Joined: May 2014
Posts: 3,861 Likes: 298 |
Every day without enough calories is a day of growth lost. Can they grow large? Maybe but don't worry about it affecting their genetics if it's only a generation or so. You bring up an interesting point: While the genes wouldn't change, perhaps the expression of those genes would, usually described as epigenetics. Fish stunting due to inadequate food might lead to adaptations in progeny designed to minimize growth so as to maximize scarce calories for survival. Not saying that's the case, but it might be. Would be an interesting research project.
Last edited by anthropic; 05/03/22 07:37 PM.
7ac 2015 CNBG RES FHM 2016 TP FLMB 2017 NLMB GSH L 2018 TP & 70 HSB PK 2019 TP RBT 2020 TFS TP 25 HSB 250 F1,L,RBT -206 2021 TFS TP GSH L,-312 2022 GSH TP CR TFS RBT -234, 2023 BG TP TFS NLMB, -160
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Joined: Mar 2005
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Moderator Hall of Fame 2014 Lunker
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Moderator Hall of Fame 2014 Lunker
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PB mag has several articles on adaptation vs evolution i.e. epigenetics vs genetics.
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