The salmon industry takes 56% of the total fish meal created for all feed industries and 87% of the total fish oil (Gillund & Myhr). These extreme numbers are raising concerns about the ability of the wild fish population to sustain salmon farming as the industry continues to grow (Gillund & Myhr).
Evidence: Pressure is being placed on the lower trophic level fish because they are removed at such an alarming rate; researchers found that it takes up to four times the amount of wild fish input compared to farmed salmon output, meaning that salmon farming is depleting the overall fish population (Rozzi & Massardo, 2009). In addition, salmon feed is 45% fishmeal and 25% fish oil. Consequently, some salmon farms in Europe must ship wild fish stocks from South America in order to fulfil this requirement. This creates an extra cost and unnecessary time and effort (Rozzi & Massardo).
2. Reason: Salmon farming harms the environment by cultivating parasites, releasing chemicals, allowing escapement, creating dead zones, and causing the death of marine …show more content…
First, they are a robust species that is tolerant of crowded conditions and physiological change. Second, females process a large quantity of eggs that can be used for hatcheries. In fact, one female can produce 30 – 40 million eggs (How to farm). Third, barramundi, unlike other farmed fish species, adapt well to feed pellets. Juvenile barramundi easily make the transition to eating feed pellets. Plus, when fed pellets, Barramundi have a phenomenal feed conversion ratio of 1.6-1.8:1. Experimentally that number has dropped to 1.0-1.2:1 Lastly, barramundi grow rapidly and reach a harvestable size of 350 grams to 3kg in six months to two years (How to