Q.Describe various methods of fish preservation.

Step 1. Recall the chapter's list of preservation methods. The chapter states that after catching, fish spoilage is prevented by different preservation methods: chilling, freezing, freeze-drying, sun-drying, smoke-drying, salting and canning.

Step 2. Group them by principle for clarity. Chilling and freezing both work by lowering temperature to slow microbial and enzymatic spoilage; freeze-drying and sun-drying/smoke-drying work by removing moisture (with smoke-drying adding preservative smoke compounds as well); salting preserves by drawing out moisture and creating an environment hostile to spoilage microbes through high salt concentration; and canning seals the fish in an airtight container, usually after heat processing, to prevent recontamination altogether. …

Listing the seven preservation methods named in the chapter and grouping t …

• Listing only two or three methods instead of the full set the chapter names.
• Confusing freeze-drying (moisture removal under cold, low-pressure conditions) with …