HATCHERY OPERATIONS 121 



Column 11: Record the total food fed for the current month from daily 

 records. 



Column 12: Record the total food fed to date. This is equal to Column 

 12 (last month) + Column 11 (this month). 



Column 13: Record the cumulative cost of fish food fed to date. This is 

 equal to Column 13 (last month) + cost for this month. Report to the 

 nearest dollar. 



Column 14: Record feed conversions for this month. This is equal to 

 Column 1 1 -^ Column 9. Record conversion to two decimal places. 



Column 15: Record the conversion to date. This is Column 12 -i- Column 

 10. 



Column 16: Record to the nearest cent, the unit feed cost per pound of 

 fish reared. This is Column 13 ^ Column 10. 



Column 1 7: Record, to the nearest cent, the unit feed cost to date per 

 1,000 fish. This is (Column 3 — the weight per 1,000 fish reported at initial 

 feeding) x Column 16. 



Column 18: Identify the type of diet fed for the current month including 

 the cost per pound. 



Column 19: Record, to two decimal places, the length of the fish on hand 

 the last day of the current month. This comes from the length-weight table 

 appropriate for Column 3. 



Column 20: Record the increase in fish length for this month. For new 

 lots, this is Column 19 — the length at initial feeding. For pre-existing lots, 

 this is Column 19 (this month) — Column 19 (last month). 



Column 21: Record the number of days since the date of initial feeding. 



Column 22: Record, to two decimal places, the average daily increase in 

 fish length. For new lots, this is Column 20 ^ the number of days the lot 

 was on feed. For pre-existing lots, this is Column 20 ^ the number of days 

 in the month. 



Column 23: Record, to two decimal places, the average daily length in- 

 crease to date. This is Column 19 — length at initial feeding -^ Column 21. 



Column 24: Record, to two decimal places, the length increase during a 

 30-day unit period. This is Column 22 x 30. 



Column 25: Record the monthly mean water temperature in degrees 

 Fahrenheit. Monthly Temperature Units (MTU) available per month are 

 the mean water temperature minus 32°F. If a lot of fish was started part 

 way through the month, the MTU reported for this column must reflect 

 the actual days the lot was on feed. For example, if fish were on feed from 

 June 16th through June 30th, the MTU available to the lot must reflect 15 

 days. A detailed explanation of Monthly Temperature Units is given on 

 page 62. 



Column 26: Record, to one decimal place, the temperature units available 

 to date. This is Column 26 (last month) + Column 25 (this month). 



