The causes behind the growing numbers of endangered species

Books about invasive species 1. What are invasive species? Invasive species, alien species, exotic pests, bio-pollution, non-indigenous species, or invasive alien species, are common names that categorize non-native animals, microbes, diseases, or plants that are pests. These pests are not native in areas in which they cause problems and they are considered "invasive" because they invade and establish populations in new areas and the resulting uncontrolled population growth and spread causes economic or environmental problems.

The causes behind the growing numbers of endangered species

Males range from 6 to 9. Killer whales are intelligent, versatile and opportunistic predators. Some populations feed mostly on fish, and other populations hunt marine mammalsincluding sea lionssealswalrusesdolphinslarge whales and some species of shark. They are considered an apex predatoras no animal predates on them.

There are up to five distinct killer whale types, some of which may be separate racessubspecies or even species. Early attempts in the s caused many injuries and deaths. However, with experience the teams who specialized in the business became more adept and post-capture survival rates improved.

Live captures peaked in the early s, but have become increasingly rare as the marine parks have learned how to maintain theme park populations through captive breeding and artificial insemination. A collecting crew from Marineland of the Pacific in Los Angelestook the 5.

Why Are Whales Endangered?

She was named Wanda and died the following day. The Southern Resident community of the Northeast Pacific lost 48 of its members to captivity. Byonly 80 killer whales were left in the community, which remains endangered. With subsequent captures, the theme parks learned more about avoiding injury during capture and subsequent care of killer whales, and discovered that they could be trained to perform tricks, making them a great attraction to visitors.

As commercial demand increased, growing numbers of Pacific orcas were captured, peaking in The Penn Cove capture became controversial due to the large number of wild killer whales that were taken seven and the number of deaths that resulted: In his interview for the CNN documentary Blackfishformer diver John Crowe told how all five of the whales had their abdomen slit open and filled with rocks, their tails weighted down with anchors and chains, in an attempt to conceal the deaths.

Public concern about the welfare of the animals and the impact of captures on the wild pods led to the Marine Mammal Protection Act being passed in by the US Congressprotecting orcas from being harassed or killed, and requiring special permits for capture.

Since then, few wild orcas have been captured in Northeastern Pacific waters. She was about six years old at time of capture and is now the oldest captive killer whale.

Lolita is the subject of the documentary Lolita: Slave to Entertainment, released in When the US Marine Mammal Protection Act of effectively stopped the capture of Pacific orcas, exhibitors found an area more tolerant of killer whale captures in Iceland.

Icelandic herring fishermen had traditionally seen killer whales as competitors for their catch, and sale of live killer whales promised a large new source of income. The capture process was based on luring the orcas by dumping leftovers from herring fishing in front of the pod, capturing the killer whales in a purse seine net, selecting desirable animals and hauling them on board in a specially designed frame, then placing them in foam-lined boxes full of seawater.

Growing concern from conservationists and animal rights activists has caused the Icelandic government to limit the number of orcas that may be captured each year. Three years later, he was sold to Marineland Canada, where he first started performing for the public and developed skin lesions indicative of poor health.

He was the star of the movie Free Willythe publicity from which led to an effort by Warner Brothers Studio to find him a better home. He was airlifted to his new home in Januarywhere he soon regained weight.

The causes behind the growing numbers of endangered species

In Septemberhe was flown to Klettsvik Bay in Vestmannaeyjar in Iceland, and gradually reintroduced to the wild, returning to the open sea in July 11, Keiko died from pneumonia in December 12, at the age of 27 years.This part of the web site looks at animal and nature conservation, the challenge to preserve declining and endangered species, the threats to habitat and more.

Endangerment is a complex issue that involves the ecosystems where species live and interact together. Measures are being taken on specific issues of endangerment, but without protecting the environments where endangered species live, these efforts will be in vane.

Information about native tree species and forests of North America, including images, North American and state specific distribution maps, botanical profiles, state lists by family and genus, noxious and invasive weeds lists, and more.

Nov 21,  · Nov. 7, — Why is the endangered western North Atlantic right whale population growing far more slowly than those of southern right whales, a sister species also recovering from near. Director’s Note: The science and research done on the true impacts of animal agriculture is always growing.

The statistics used in the film were based on the best information we had available while producing the film. An "endangered" species is any species in danger of extinction through all or a significant portion of its range. A "threatened" species is any species that is likely to become an endangered species within the foreseeable future.

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