Remember Butkiss The 41 Year Old Pacu

jlnguyen74

Potamotrygon
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Mar 26, 2007
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Juxtaroberto;4870752; said:
The reason we don't see 36" Pacus commonly is because people put them in small tanks. Small Pacus are a consequence of, not at excuse for, small tanks. The record exists for a reason, because someone has measured a 3ft pacu, meaning they have the capacity to reach such sizes. Perhaps it happens with greater age, but it apparently happens.

Yes, a person could live in a closet for 39 years, if you fed them and cleaned their poop out regularly. Their unused muscles would atrophy, and they'd probably have some serious developmental problems, but they would survive. That Pacu definitely has developmental problems.
You have hard time to distinguish between "live" and "survive" Who's the "someone," who has measured a 3ft pacu?
 

Chicklette

Feeder Fish
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Jun 19, 2010
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Oh no that's sad. They don't belong in tanks. I wish stores would quit selling them.
 

Juxtaroberto

Fire Eel
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jlnguyen74;4872084; said:
You have hard time to distinguish between "live" and "survive" Who's the "someone," who has measured a 3ft pacu?
Researchers at Oxnard University

Fishery statistics and length data series for Colossoma macropomum Cuvier obtained during 1992 and 1993 in the Lower Amazon, Brazil were used to describe the fishery and to estimate growth and mortality rates. Mean population parameters were L∞ = 119.85 cm (total length), W∞ = 33.4 kg, K = 0.228 year–1, C = 0.505, Winter Point = July, M = 0.445 year–1, F = 0.94 year–1 and Lc = 28.29 cm. Yield-per-recruit analysis showed that an excessive fishing effort and principally a very low length at first capture lead to an increase in overfishing in the region. Corrective measures are recommended.
You're right. I was wrong. It's actually FOUR feet.

Why is such a distinction even being discussed? Many organisms can survive many different environments, but it isn't ethical to subject them to those environments when they cause bodily impairment and harm.
 

jlnguyen74

Potamotrygon
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Mar 26, 2007
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You have hard time to distinguish between "actually" and "estimate"
Juxtaroberto;4873772; said:
Researchers at Oxnard University
Fishery statistics and length data series for Colossoma macropomum Cuvier obtained during 1992 and 1993 in the Lower Amazon, Brazil were used to describe the fishery and to estimate growth and mortality rates. Mean population parameters were L∞ = 119.85 cm (total length), W∞ = 33.4 kg, K = 0.228 year–1, C = 0.505, Winter Point = July, M = 0.445 year–1, F = 0.94 year–1 and Lc = 28.29 cm. Yield-per-recruit analysis showed that an excessive fishing effort and principally a very low length at first capture lead to an increase in overfishing in the region. Corrective measures are recommended.
 

lix.ma14

Hydrolycus Armatus
MFK Member
Jan 7, 2011
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so this is a senoir fish retirement home like. all pain and miseries. Respest ur elders!
 

Juxtaroberto

Fire Eel
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jlnguyen74;4873799; said:
You have hard time to distinguish between "actually" and "estimate"
No, no, no. Read it again. They didn't estimate the size of the fish, you cannot get a mean size through estimation. You get a mean size by measuring as many fish as possible, adding up the total lengths, and then dividing by the number of fish you measured. Once they had that data in hand, they used THAT to estimate growth and mortality rates. Different things.
 

jlnguyen74

Potamotrygon
MFK Member
Mar 26, 2007
7,553
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Juxtaroberto;4879226; said:
No, no, no. Read it again. They didn't estimate the size of the fish, you cannot get a mean size through estimation. You get a mean size by measuring as many fish as possible, adding up the total lengths, and then dividing by the number of fish you measured. Once they had that data in hand, they used THAT to estimate growth and mortality rates. Different things.
While "mean" obtain from averaging, the total length was an estimation, otherwise, why it's "infinite," instead of actual? Was it "measuring as many fish as possible, adding up the total lengths, and then dividing by the number of fish?" Or was it measuring a certain fish over certain years, get the average growth rate, and project the growth thru "infinite" years live... C'm on, you gotta be smarter than that, or did I give you too much credit?
 
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