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Several days after capture, which genus dominates TMAO reduction in fish from cold water?

  • A.Pseudomonas
  • B.Lactobacillus
  • C.Clostridium
  • D.Shewanella

Answer: D

The dominant reducer depends on where the fish came from: Shewanella in cold-water fish and pseudomonads in warm-water fish. Either way the reaction produces trimethylamine, so the spoilage endpoint looks the same even though the flora differs.

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