GOVT. P.G. COLLEGE JHALAWARHEMANT BAIRWA [M.sc [zoology][final]
SEMINAR ON FISH PRESERVATION & PROCESSING
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FISH PRESERVATION & PROCESSINGCONTENTS...
INTRODUCTIONRIGOR MORTISCAUSES OF THE SPOILAGE FISH
RANCIDITYMETHOD OF PRESERVATION OF FISHPROCESSING OF FISHFOOD
POISONING BY FISHREFERANCE
INTERODUCTION...Fish flesh excellent food , fat, vitamin !
connective tissue digest fish flesh water high amount spoil
consumer good condition catchment area consumer :, transport
cooling facilities fish spoilage
RIGOR MORTIS... 5-7hour fresh muscle ATP muscle present
glycogen, glycolysis oxygen lactic acid muscle Ph. reduced muscle
creatine phosphate lost muscle staff and non relax muscle stiffness
or rigidity rigor mortis mouth open opercular spreat out flabby
foul smelling fish human consumption unfit
CAUSE OF THE SPOLIAGE FISH:-fish body, gill gut bacteria fishes
spoilage living fish growth resistance after death resistance ,
growth bacteria fish spoilage direct enzyme producing muscle break
down spoilage after death fish body present digestive enzyme ,
break down ammonia, carbandioxide, amines, hydrogen & sulphate
, smell water Rxn. spoilage |
FISH SPOILAGE...marine fishes tri methyl amine bacterial
composition tri methylamine breakdown fish, carps, sardines and
mackerels body oil chemical Rxn. fish flesh, lightly acidic
(ph=6.4) spoilage flesh alkaline (ph=7.6) ph determine fish flesh
spoliation
RANCIDITY...fish body oil solution presant oxygen fish
discoloration rancidity rancidity salt Mg, Ca, Al, Zn Rancidity
antioxidant
Method of preservation of Fish...spoilage fish fresh fish
preservation human consumption fit
Method of preservation of Fish... CHILLINGFREEZINGDEEP FREEZING
AND FREEZING DRYINGSUN DRYING SALTINGSMOKINGCANNINGUSE OF CHEMICAL
& RADIATION
CHILLING...(1) CHILLING:-- SPOILAGE simple method putrefaction
ice about 0'c temp. Fish preserve low. temp. Bacteria
multiplication Enzymatic Rxn. ice alternate large size Fish gutted
water wash abdomen cavity ice , ice layer covered short time
method
FREEZING... most effective method , 0c temp. mixing salt with
ice mix refrigeration 0c temp. preserve frozen loose distasteful()
simple freezing flesh denaturation leaching flavour loss
FREEZING... Raveidity Fish flavour colour preserve , hard ice
layer hard ice layer atmosphere oxygen exposure rancidity
prevent
DEEP FREEZING AND FREEZE-DRYING...Deep freezing or quick
freezing fish low temp. 40c preserve fast frozen small size crystal
tissue damage Deep freezing cool air current freezing use
denaturation flavour loss
DEEP FREEZING AND FREEZE-DRYING...freeze drying deep freezing
modified process frozen fish direct ice sublimation dry flesh
denaturation fish flavour colour nutritive value freeze drying 140c
temp. vacuum chamber Fish air conditional packed method costly best
quality Fish
SUN DRYING... Fish clean water wash 2-3 sunlight dry Fish sand
or mat cheap method , bacteria growth Bombay duck, Ribbon fish
& Prawn preserve
SALTING... method cheap and dependable salt Fish osmosis
dehydration , protein Enzyme inactive Fish water clear salt Fish
salt rolled , Fish salt covered
SALTING...Large Fish gutted & cleared abdomen cavity salt
after salting Fishes cool place India west coast area salt drying
process three stage (1) fishes gutted & clean , total amount
50% salt abdomen cavity , heaps stored
SALTING...
(2) after 24 hr. heap : 50% salt abdomen cavity , : heap arrange
(3) salt : apply one week fish market
SMOKING... Fish salt treated chamber , hard wood pipe chamber
density,temperature & speed of circulation properly control
CANNING... method fish small pieces , blood & slime water
wash brine or salt solution treat tin canes pack Canes Bacteria
spoilage sterilized method costly , preserve production
Non-eatable
USE OF CHEMICAL & RADIATION... chemical sodium nitrate, , ,
benzoic preservation Gama-ray low radiation Bacteria kill spoilage
: use fish preservation
PROCESSING OF FISH...Cleaning , drying , salting , freezing and
canning method processing of fishes processing of fish liver oil,
body oil, fish meal other several product
FOOD POISONING BY FISH... person Fish, good and safe sensitive
person allergic Rxn. gastro-intestinal disorder species-Sardines,
Herrings & Mackerels,Histamine poisonous Bacteria like
Salmonella Sshigella toxin produce flesh poisonous
FOOD POISONING BY FISH... botulin" bacteria toxin Human muscles
disorder "Botulism" treatment possible
REFRENCE...Biology of fishes Richardd MooreAn introduction to
fishes S.S.KhannaA text book of fish biology and fisheries H.R.
Singh (ISBN -13:9788185375755) Thank You.........
