Term
| Compare the inputs vs outputs in fish production |
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Definition
| see question #1 on study sheet |
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Term
| What is nutrition vs feeding? |
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Definition
Nutrition: science of nutrients
Feeding: process of delivering nutrients |
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Term
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Definition
Feed: imposed
Food: self-selected |
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Term
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Definition
Feed: individual item being imposed on the animal
Diet: total different food items being consumed |
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Term
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Definition
Feed Efficiency (Ratio)
Biomass gain / feed consumed (DM basis) |
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Term
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Definition
Feed Conversion Ratio
Feed consumed (DM) / biomass gain |
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Term
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Definition
economical feed conversion ratio
Feed Purchased / Biomass Sold |
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Term
| What is the difference between eFCR or bFCR? |
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Definition
bFCR = biological feed conversion ratio
accounts for wasted feed, fish that die etc. (eFCR does not) |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| starch, hemicellulose, lignin, etc |
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Term
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Definition
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Term
What are the abbreviations for the following?
Intake
Fecal
Digestible
Urinary
Branchial
Metabolizable
Retained |
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Definition
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Term
| N is the abbreviation for.... |
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Definition
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Term
IN = FN + UN + ZN + RN
What does this equation mean? |
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Definition
| Nitrogen intake = Fecal nitrogen + urinary nitrogen + branchial nitrogen + retained nitrogen |
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Term
| Compare the feed intake of large vs small animals |
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Definition
| large animals eat more in terms of absolute intake, but less in terms of %body weight per day |
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Term
| Is maximum FCE achieved if feed intake levels are equal to, above or below the max feed intake of the animal |
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Definition
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Term
| What effect does a decrease in feeding level have on FCE? |
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Definition
| minimal, but there is a small decrease |
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Term
| What factors affect how much feed a fish needs per day? (4) |
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Definition
water temp / other environmental variables
genetic potential
nutritional composition of the feed
husbandry practices and health status |
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Term
| How does increasing the concentration of an essential nutrient affect growth? |
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Definition
| increases feed intake an metabolic efficiency, improving growth rate |
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Term
| What factors affect the estimation of a nutrient requirement? |
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Definition
-experimental conditions/errors
-parameter being studied (weight gain vs protein gain)
-mathematical model being used
-feed composition
-how requirement is expressed (% of diet, g/100g protein etc) |
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Term
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Definition
| probability you will reject null when it's true |
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Term
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Definition
| probability you will accept null when it's false |
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Term
| What is statistical power? |
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Definition
the probability the test will reject the null hypothesis
when it is false. |
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Term
| Is a higher power of a test good or bad? |
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Definition
good!
more likely to correctly reject a false null hypothesis |
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Term
| What is the correlation between the size of the difference between two diets being compared, and the number of experimental replications you need to have? |
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Definition
| The smaller the difference between two diets, the more replications you need to have to be able to show a significance |
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Term
| If you only have 2 ponds to carry out a diet comparison, how can you make the most of your experiment? |
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Definition
Plan, monitor and document the feed preparation process very carefully
Use same batch of each ingredients for all the feeds
Use strong treatment structure
Ex: 5 or 6 diets with grade levels of nutrients of interest
If one diet is “off” target, the general trend will still be seen
Test for feeds for nutrients or compound studied or indicator
Helps determine if the preparation was according to recipe
Ex: Stachyose levels for soybean meal |
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