The bar graph depicts the data on the amount of three different types of fish in one region throughout time period from 2008 to 2018.
Overall, while Arctic char dominated initially, salmon was cultivated in far greater numbers towards the end of the period, and rainbow trout has consistently been produced the least.
In 2008, 3124 million tonnes of Arctic char were produced in this region. As this figure was more than ten times that of the next highest, farmed salmon at 292 million tonnes, this species clearly dominated at that time. However, Arctic char fell slightly in 2010 and rose only gradually in 2012, while salmon rose noticeably in almost every two-year period. In fact, in 2014 salmon overtook Arctic char, and reached 13448 in 2018.
In contrast, rainbow trout was relatively small amounts, beginning at only six million tonnes in 2008. Although it did increase reaching a peak of 2138 million in 2016, this level was short-lived, and by 2018 it had fallen to 295, which was almost the same as salmon’s starting point ten years earlier.