“Superfish” With Bigger Hearts Better Equipped for Climate Change

Researchers were looking at salmon populations in the Fraser River, which host over 100 different populations of salmon. Studies have shown that since water temperatures have been increasing so has the salmon mortality rate. New studies show that salmon that swim a difficult route during their migration are more capable in handling warm water temperature or temperature increase. Also some studies have shown that salmon with stronger and larger hearts are able to survive temperature increases compared to normal salmon. A researcher tells about a study that was performed by taking salmon during a certain period in their migration and testing there endurance. To test this water temperature that the fish will be swimming in is controlled. Salmon from the population Chilko, who are known for their challenging migration performed very well and were given the name “superfish.” The Chilko salmon face varying water temperatures along with torturous routes during their migration. Researchers are now wondering if the adaption that occurred in Chilko salmon is able to transpire into other salmon populations.

This article relates very well to class because not only did we look at salmon migration and the effect of water temperature, but also because this article shows us different ecological adaptions certain populations can undergo to ensure for better survival. The article overall was very helpful in not only showing what is effecting the mortality rates of the salmon, but it also shows how some populations can overcome it.

Amanda Corso

Source: http://news.nationalgeographic.com/news/2011/03/110331-salmon-global-warming-adaptation/