Text 21193, 92 rader
Skriven 2012-02-12 17:02:00 av JIM WELLER (1:123/140)
     Kommentar till en text av DAVE DRUM
Ärende: Fish pellets 2
======================
It gets worse in China:

Extracts from a FAO report:

FISH FEED FORMULATION AND PRODUCTION, PEOPLE'S REPUBLIC OF CHINA: A
report prepared for the project Fisheries Development in Qinghai
Province by Albert G.J. Tacon, Fish Feed Specialist

4.3 Feed availability for trout

visceral by-products (ie. liver, lung, stomach, intestine) and dried
by-product meals (bone meal, blood meal.

feather meal (Yes they use feathers. So do we.- JW)
                                      
fresh slaughter house wastes (liver, lung and blood) [...] dried
under the sun (as opposed to cooked or freeze dried - JW)

reported fish mortalities were high [...] it is thought to be
diet-related  (Oh good, we only get to eat the malnutritioned but
live ones [maybe]. - JW)

Observed dietary inclusion 

Blood meal 
Hydrolysed feather meal
Groundnut meal, solvent extracted
Meat bone meal, solvent extracted 
Poultry by-product meal
Rapeseed meal, solvent extracted 
Rice bran, solvent extracted 
Soybean meal, solvent extracted
 
2 Blood meal protein is a rich source of leucine, valine and
histidine, but is very deficient in isoleucine and methionine;
because of the antagonistic effect if excess leucine on isoleucine,
animals fed high dietary levels of blood meal may suffer from an
isoleucine deficiency

3 Hydrolysed feather meal protein is a rich source of cystine but is
deficient in methionine, lysine and histidine; because of the
antagonistic effect of excess cystine on methionine, animals fed
high levels of feather meal may suffer from an methionine deficiency

5.2 Carp

natural pond food organisms (resulting from the fertilization of
ponds with animal manures) 

6. RECOMMENDED 

good quality trout feeds by local feed mills 

Formulation of good quality diets

quality ingredients (ie. such as fishmeal) rather than experimenting
with unknown cheaper alternatives such as rapeseed meal. 

nutritional success is dependent upon the individual manufacturing
process used to produce them.  since the level of technology
available to manufacture these ingredient sources is still in its
infancy, and the proximate composition of these ingredient sources
is highly variable, their inclusion level within the proposed diet
lines has been kept to a minimum.

low levels of glucosinolates and erucic acid (antinutritional
factors) should be used

Feed storage: Since the manufactured diets are composed of
perishable nutrients it is essential that the feed storage period on
the farm prior to feeding be kept to a minimum and that adequate
storage facilities are provided.

Establish artificial propagation technology for the production of
fry and fingerlings of naked carp for stocking the lake.

In-house training

Heavy metal content of the meal should also be checked (also)
aflatoxin


Cheers

YK Jim


... Twinkies: the quintessential mass-manufactured ersatz food

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