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.........