What is the main cause of the salmon becoming endangered?

What is the main cause of the salmon becoming endangered?

Many salmon stocks are seriously threatened by what are called the “four H’s”: Habitat destruction, Hydroelectric dams on migratory rivers, over-Harvest of rare stocks, and competition with Hatchery fish. Threatened means they are likely to become endangered in the near future.

What would happen if salmon went extinct?

If the salmon were to disappear, then it may cause a mass succession and if the salmon were thriving then the ecosystem would mature. This would happen since the salmon bring nutrients to the trees as well. The MDN are then absorbed into the plants and then they begin to grow more due to the nutrients.

How are salmon protected?

Dams block Atlantic salmon migration paths between rivers and the ocean and can prevent salmon from reaching the habitats needed for spawning and juvenile rearing. Turbines used to generate electricity can kill or injure many salmon as they migrate through dams on their journeys to the ocean.

How are humans harming salmon?

pollution. using artificial means to help salmon reproduce and grow. taking salmon out of the water to transport them on a boat or truck. releasing salmon into the sea after raising them in hatcheries.

Do polar bears eat salmon?

Polar Bears. Unlike Grizzly Bears, Polar Bears are not expert in catching fish and there is very little ice in summer for the Polar Bears to serve as their hunting ground. Polar Bears mostly catch Salmon and Cod during swimming when they intend to eat fish.

What animal eats the most salmon?

Eagles, hawks, orcas, seals, sharks and sea lions often eat adult salmon. Humans are the biggest consumer and threat to salmon. When salmon return to fresh water to spawn, bears and eagles are their most common predators.

Do dolphins eat salmon?

Dolphins eat a variety of fish, squid, shrimps, jellyfish and octopuses. In the winter, salmon is scarce, and so they eat herring and mackerel. Bottlenose dolphins living elsewhere eat their favoured local fish which can be mullet, mackerel, catfish and more tropical species of fish.