There are many possible replacements for fishmeal in aquaculture diets, including soybean meal, canola meal, cottonseed meal, and sunflower meal. Other potential sources of protein include insects, algae, and single-cell proteins. Some of these alternative protein sources are already being used in aquaculture, while others are still in the research and development stage.
Soybean meal is the most commonly used replacement for fishmeal in aquaculture diets. It is a good source of protein and essential amino acids, and is relatively inexpensive. However, soybean meal can cause problems with water quality and is not a very sustainable option.
Canola meal is another popular replacement for fishmeal. It is a good source of protein and essential amino acids, and is less expensive than soybean meal. Canola meal can also cause problems with water quality, but to a lesser extent than soybean meal.
Cottonseed meal is another protein-rich feed