Chapter 6 Fish and Fish Products Flashcards
What are the effects of exhaustion on the meat of fish?
- Rigor mortis
- pH
- Gaping
- Toughness
- Drip formation
What is the purpose of evisceration of fish? What is the drawback of this evisceration?
- Purpose: to prevent discoloration and belly-burst due to intestinal enzymes and gut bacteria.
- Drawback: Cutting exposes flesh that are prone to microbial attack.
What are some example of microorganisms of the initial microflora of fish?
- Psychrobacter, pseudomonas, bacillus, clostridium, listeria monocytogenes, fecal, Shewanella spp.
What are some examples of parasites that may be in fish?
- Anisakis sp.
- Trematodes (Intestinal, lung, and liver flukes)
What causes the presence of Vibrio cholerae in fish?
Fecal contaminated water.
What are some ways to control parasite in fish?
- Cooking
- freezing
- chilling and gutting fish
- Reject sample if they contain two or more parasites per kg.
Why is line-catching sometimes preferred over trawling?
- Line catching has less stress and less damage to the fish.
What are the toxins that may be found in fish product?
- Paralytic shellfish poisoning (PSP)
- Diarrhetic shellfish poisoning (DSP)
- Neurotoxic shellfish poisoning (NSP)
- Amnesic shellfish poisoning (ASP)
- Ciguatera
- Histamine
- Tetrodotoxin
Shellfish poisoning toxins are typically produced by a genus of algae called __________.
Dinoflagellates
What are some interventions to prevent virus outbreak?
- Practice good hygiene such as good hand hygiene.
- Use chlorine water to reduce microorganisms.
- Cook/steam shellfish.
What affects the initial microflora of aquaculture product?
- The extend of feeding, the stocking level in the ponds.
What are some microbial hazards in aquaculture fish?
- Shellfish toxins accumulation.
- Parasite if live fish is used as feed.
- Contamination by enteric organisms. (fecal contamination of water)
- Presence of chemotherapeutics and antibiotic residues. (chemical contamination of water)
