Tips for guessing weight - Aquaponic Gardening2024-03-28T15:29:02Zhttps://aquaponicgardening.ning.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&commentId=4778851%3AComment%3A337135&groupId=4778851%3AGroup%3A29&feed=yes&xn_auth=noI took the liberty of paraphr…tag:aquaponicgardening.ning.com,2013-05-31:4778851:Comment:4813522013-05-31T14:57:54.446ZRobert Rowehttps://aquaponicgardening.ning.com/profile/RobertCRoweBob
<p style="margin-bottom: 0in;"><font size="4">I took the liberty of paraphrasing Marty Lininger.</font></p>
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<p style="margin-bottom: 0in;"><font size="4">WT = CF x L</font><sup><font size="4">n</font></sup> <font size="4">/ 1,000,000</font></p>
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<p style="margin-bottom: 0in;"><font size="4">Given WT is estimated fish weight in Lbs</font></p>
<p style="margin-bottom: 0in;"><font size="4">CF is a correction factor 750-900 for…</font></p>
<p style="margin-bottom: 0in;"><font size="4">I took the liberty of paraphrasing Marty Lininger.</font></p>
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<p style="margin-bottom: 0in;"><font size="4">WT = CF x L</font><sup><font size="4">n</font></sup> <font size="4">/ 1,000,000</font></p>
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<p style="margin-bottom: 0in;"><font size="4">Given WT is estimated fish weight in Lbs</font></p>
<p style="margin-bottom: 0in;"><font size="4">CF is a correction factor 750-900 for Tilapia (varies with fish condition)</font></p>
<p style="margin-bottom: 0in;"><font size="4">L is length in inches</font></p>
<p style="margin-bottom: 0in;"><font size="4">n is an exponent which is "3" for Tilipia (maybe a body type indicator)</font></p>
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<p style="margin-bottom: 0in;"><font size="4">I use "open office", superscripts/subscripts are managed by the format Character function, which apparently is not supported by "Ning" <br/></font></p>
<p><br/> <br/> <cite>marty lininger said:</cite></p>
<blockquote cite="http://community.theaquaponicsource.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&#4778851Comment333327"><div><div class="xg_user_generated"><p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
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<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p>
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</blockquote> I was guessing CF was Circumf…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3370812012-05-18T19:09:19.671ZNTShttps://aquaponicgardening.ning.com/profile/NTS
<p>I was guessing CF was Circumference</p>
<p>I was guessing CF was Circumference</p> Ah, makes sense. And I missed…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3371452012-05-18T15:54:59.629ZSheri Schmeckpeperhttps://aquaponicgardening.ning.com/profile/SheriSchmeckpeper
<p>Ah, makes sense. And I missed the 3rd power. So...</p>
<p>Lbs = (CF x (In[n])) / 1,000,000 </p>
<p>Lbs T =(825 (the perfect fish) x (12[3])) / 1,000,000 </p>
<p>Lbs = (825 x 1728) / 1,000,000</p>
<p>Lbs = 1.4256</p>
<p>Hmmm... You may be right about the age, Bill. Ours weren't skinny, and were adults, but at 12", they aren't large adults. Our correction factor ends up at 556. We'll see what happens as the grow larger.</p>
<p>Regardless, this makes one think about how to plump them up more.…</p>
<p>Ah, makes sense. And I missed the 3rd power. So...</p>
<p>Lbs = (CF x (In[n])) / 1,000,000 </p>
<p>Lbs T =(825 (the perfect fish) x (12[3])) / 1,000,000 </p>
<p>Lbs = (825 x 1728) / 1,000,000</p>
<p>Lbs = 1.4256</p>
<p>Hmmm... You may be right about the age, Bill. Ours weren't skinny, and were adults, but at 12", they aren't large adults. Our correction factor ends up at 556. We'll see what happens as the grow larger.</p>
<p>Regardless, this makes one think about how to plump them up more. It would be nice to get a larger percentage of meat off each fish!</p> marty lininger said:
anothe…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3371412012-05-18T14:53:22.163Zmarty liningerhttps://aquaponicgardening.ning.com/profile/martylininger
<p><br></br> <br></br> <cite>marty lininger said:</cite></p>
<p>another thing Bill is that formula may only be meaningful for adult fish. the book does not say. the younger they are the faster they grow and since a younger fish is putting more energy into bone and skin than muscle as a percentage of body mass, the formula may just not work well for them.…</p>
<p><br/> <br/> <cite>marty lininger said:</cite></p>
<p>another thing Bill is that formula may only be meaningful for adult fish. the book does not say. the younger they are the faster they grow and since a younger fish is putting more energy into bone and skin than muscle as a percentage of body mass, the formula may just not work well for them.</p>
<blockquote cite="http://aquaponicscommunity.com/group/tilapiagrowers/forum/comment/show?id=4778851%3AComment%3A336999&xn_out=json&firstPage=1&lastPage=1&xg_token=a674a4430a8090bf79c5832f1c9da98b&_=1337352414152#4778851Comment336999"><div><p><br/> <br/> <cite>Bill Barker said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&commentId=4778851%3AComment%3A336996&xg_source=msg_com_gr_forum#4778851Comment337135"><div><div class="xg_user_generated"><p>Marty, I seem to have a problem with the formula. If I have a 5 inch fish, multiply that length by 750, I get 3750 and raise that to the 3rd power, I get 52,734,375,000 and even dividing by 1 million gives a weight of 3,750 lbs - something is wrong, what am I not understanding?<br/> <br/> <cite>marty lininger said:</cite></p>
<p>sorry that my formula was not written clearly, the mistake is that only the length of the fish is raised to the 3rd power, then multiply by CF, then divide by 1,000,000 in this case a 5" fish at CF=750 weighs .094 pounds or 1.5 oz and at CF = 900 this fish weighs .11 pounds or 1.8 oz.</p>
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<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&#4778851Comment333327"><div><div class="xg_user_generated"><p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
<p></p>
<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p>
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</blockquote> Sheri, the book does not defi…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3372172012-05-18T14:50:16.496Zmarty liningerhttps://aquaponicgardening.ning.com/profile/martylininger
<p>Sheri, the book does not define CF, it may simply mean "correction factor". it is a useful tool however for commercial growers to gauge their feeding rate. a fish with a low CF is skinny and not eating enough. a fish in the high CF range is fat and is eating too much. the ideal is in the middle if you can do it, according to my understanding.<br></br> <br></br> <cite>Sheri Schmeckpeper said:…</cite></p>
<p>Sheri, the book does not define CF, it may simply mean "correction factor". it is a useful tool however for commercial growers to gauge their feeding rate. a fish with a low CF is skinny and not eating enough. a fish in the high CF range is fat and is eating too much. the ideal is in the middle if you can do it, according to my understanding.<br/> <br/> <cite>Sheri Schmeckpeper said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&commentId=4778851%3AComment%3A336996&xg_source=msg_com_gr_forum#4778851Comment336996"><div><div class="xg_user_generated"><p>Well, NTS, I just learned that the quick answer for Nile tilapia is 12" = 1 lb.</p>
<p>I just processed two Nile tilapia, each about 12" long. <br/>They weighed on the shy side of 1lb.<br/>We got 4-5 oz of meat from each.</p>
<p>This formula was pretty accurate: WT(lbs) = 800 x L(inches) / 10,000</p>
<p>Our meat weight (oz) was WT (lbs) / 16 * .33. I don't know if this would apply to all sizes, or if the percentage of meat changes with age.</p>
<p>I would better understand the formula if I knew what CF is. cubic feet?? That wouldn't make sense at 800CF.</p>
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</blockquote> Bill Barker said:
Marty, I…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3369992012-05-18T14:46:53.830Zmarty liningerhttps://aquaponicgardening.ning.com/profile/martylininger
<p><br></br> <br></br> <cite>Bill Barker said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&commentId=4778851%3AComment%3A336996&xg_source=msg_com_gr_forum#4778851Comment337135"><div><div class="xg_user_generated"><p>Marty, I seem to have a problem with the formula. If I have a 5 inch fish, multiply that length by 750, I get 3750 and raise that to the 3rd power, I get 52,734,375,000 and even dividing by 1 million gives…</p>
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<p><br/> <br/> <cite>Bill Barker said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&commentId=4778851%3AComment%3A336996&xg_source=msg_com_gr_forum#4778851Comment337135"><div><div class="xg_user_generated"><p>Marty, I seem to have a problem with the formula. If I have a 5 inch fish, multiply that length by 750, I get 3750 and raise that to the 3rd power, I get 52,734,375,000 and even dividing by 1 million gives a weight of 3,750 lbs - something is wrong, what am I not understanding?<br/> <br/> <cite>marty lininger said:</cite></p>
<p>sorry that my formula was not written clearly, the mistake is that only the length of the fish is raised to the 3rd power, then multiply by CF, then divide by 1,000,000 in this case a 5" fish at CF=750 weighs .094 pounds or 1.5 oz and at CF = 900 this fish weighs .11 pounds or 1.8 oz.</p>
<p></p>
<p></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&#4778851Comment333327"><div><div class="xg_user_generated"><p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
<p></p>
<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p>
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</blockquote> Well, NTS, I just learned tha…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3369962012-05-18T14:04:47.802ZSheri Schmeckpeperhttps://aquaponicgardening.ning.com/profile/SheriSchmeckpeper
<p>Well, NTS, I just learned that the quick answer for Nile tilapia is 12" = 1 lb.</p>
<p>I just processed two Nile tilapia, each about 12" long. <br></br>They weighed on the shy side of 1lb.<br></br>We got 4-5 oz of meat from each.</p>
<p>This formula was pretty accurate: WT(lbs) = 800 x L(inches) / 10,000</p>
<p>Our meat weight (oz) was WT (lbs) / 16 * .33. I don't know if this would apply to all sizes, or if the percentage of meat changes with age.</p>
<p>I would better understand the formula if I…</p>
<p>Well, NTS, I just learned that the quick answer for Nile tilapia is 12" = 1 lb.</p>
<p>I just processed two Nile tilapia, each about 12" long. <br/>They weighed on the shy side of 1lb.<br/>We got 4-5 oz of meat from each.</p>
<p>This formula was pretty accurate: WT(lbs) = 800 x L(inches) / 10,000</p>
<p>Our meat weight (oz) was WT (lbs) / 16 * .33. I don't know if this would apply to all sizes, or if the percentage of meat changes with age.</p>
<p>I would better understand the formula if I knew what CF is. cubic feet?? That wouldn't make sense at 800CF.</p> Marty, I seem to have a probl…tag:aquaponicgardening.ning.com,2012-05-18:4778851:Comment:3371352012-05-18T13:00:24.199ZPiceshttps://aquaponicgardening.ning.com/profile/WilliamBarker
<p>Marty, I seem to have a problem with the formula. If I have a 5 inch fish, multiply that length by 750, I get 3750 and raise that to the 3rd power, I get 52,734,375,000 and even dividing by 1 million gives a weight of 3,750 lbs - something is wrong, what am I not understanding?<br></br> <br></br> <cite>marty lininger said:…</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&#4778851Comment333327"></blockquote>
<p>Marty, I seem to have a problem with the formula. If I have a 5 inch fish, multiply that length by 750, I get 3750 and raise that to the 3rd power, I get 52,734,375,000 and even dividing by 1 million gives a weight of 3,750 lbs - something is wrong, what am I not understanding?<br/> <br/> <cite>marty lininger said:</cite></p>
<blockquote cite="http://aquaponicscommunity.com/forum/topics/tips-for-guessing-weight?groupUrl=tilapiagrowers&#4778851Comment333327"><div><div class="xg_user_generated"><p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
<p></p>
<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p>
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</blockquote> do not know how to make sub /…tag:aquaponicgardening.ning.com,2012-05-10:4778851:Comment:3333272012-05-10T21:13:24.333Zmarty liningerhttps://aquaponicgardening.ning.com/profile/martylininger
<p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
<p></p>
<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p>
<p>do not know how to make sub / superscripts here...</p>
<p>WT (lbs) =(CF x L (inches)n) / 1,000,000 where n is the exponent "3" for tilapia and CF = 750 to 900 for Tilapia</p>
<p>therefore if you measure a few and weigh them and input the numbers into this equation you will learn the CF for your fish. CF is affected by numerous factors and can vary from time to time</p>
<p></p>
<p>this is from Recirculation Aquaculture, Timmons, Ebeling</p> I can only tell aprox about t…tag:aquaponicgardening.ning.com,2012-04-20:4778851:Comment:3229682012-04-20T10:18:32.435ZTCLynxhttps://aquaponicgardening.ning.com/profile/TCLynx
<p>I can only tell aprox about the ones that are big enough to harvest since we often weight them after we kill them.</p>
<p>As for little ones. It can be difficult to weigh a flopping struggling fish.</p>
<p>I can only tell aprox about the ones that are big enough to harvest since we often weight them after we kill them.</p>
<p>As for little ones. It can be difficult to weigh a flopping struggling fish.</p>