The bar chart illustrates the changes in the populations of seals, whales, and dolphins in the Georgia Strait over four selected years between 2006 and 2018.
Overall, dolphin numbers increased dramatically, seals experienced a fluctuation but ended the period higher, while the whale population remained relatively stable. The total number of all three species was lowest in 2010 and peaked in 2018.
In 2006, seals had the highest population at approximately 40, followed by whales at around 25 and dolphins at just 17. By 2010, the seal population had dropped sharply to about 24, making it the lowest among the three. Dolphin numbers rose slightly to match the whale count, both at around 25.
Between 2010 and 2018, dolphin numbers grew steadily, reaching nearly 50 by the end of the period, overtaking both seals and whales. Seals also saw a significant recovery, increasing to 43 in 2018. Meanwhile, the whale population showed minimal change throughout the period, remaining within the 22 to 28 range.