Endangered species Photo by: Once extinct, a species is no longer found anywhere on Earth.
New way to save endangered sharks — and our seafood A shark - Copyright: Panos Illegal fishing of protected sharks is fuelled by high prices paid for fins A new genetic tool can track illegal fishing of endangered sharks Saving sharks can also help save marine ecosystems and our seafood By: You have to credit our authors.
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This is important because sharks are top predators that keep the marine ecosystem in check, helping to sustain the food web that supports millions of people worldwide who rely on seafood sustenance. Although shark fishing is banned in Brazil, the clandestine market continues, driven partly by the high prices shark fins fetch: Fishermen engaged in illegal fishing of sharks usually resort to finning: Until now, it has been hard to tell whether the fins come from protected sharks, as they might look quite similar when severed.
In a study published in Fisheries Researchresearchers used DNA barcoding, a genetic tool able to analyses short segments of about base pairs of the mitochondrial genome, for distinguishing different species of sharks.
By doing so, scientists were able to link many of the samples to three protected shark species: Squatina guggenheim, Squatina occulta and Pseudobatos horkelii. All of them are listed as endangered or critically endangered on the International Union for Conservation of Nature IUCN Red List of Threatened Species, an inventory of the global conservation status of plant and animal species and subspecies.
The capture, transportation, storage, handling, processing, and trade of these shark species — that are already experiencing drastic population declines — has been prohibited in Brazil since The authors propose that this method could be used by local authorities, so fishermen who catch and commercialize endangered species are sanctioned.
He says sharks are sensitive to overfishing because they grow slowly, take a long time to mature, and have few offspring — a bit like mammals such as humans.
About million sharks are caught and killed by humans annuallyaround 7 per cent of the total population, which is not naturally sustainable.
The decline in sharks has knock-on effects that might negatively affect human wellbeing too. It plays havoc with the ecosystem and the consequences may extend to local people who depend on marine biodiversity for income and as a source of food.World Wildlife Fund - The leading organization in wildlife conservation and endangered species.
Learn how you can help WWF make a difference. Your donation supports biodiversity conservation efforts and helps to save endangered animals like insects, reptiles and amphibians all over the world.
Our Sites: Give to The Biodiversity Group. Sponsor the name of a newly discovered species! Contact Us. The World Bank Group works in every major area of development. We provide a wide array of financial products and technical assistance, and we help countries share and apply innovative knowledge and solutions to the challenges they face.
Unlike past mass extinctions, caused by events like asteroid strikes, volcanic eruptions, and natural climate shifts, the current crisis is almost entirely caused by us — humans.
In fact, 99 percent of currently threatened species are at risk from human activities, primarily those driving habitat loss, introduction of exotic species, and global warming .
Biodiversity constitutes the living component of natural capital, but is extremely difficult to fully value. While often perceived as simply representing exotic or endangered species, biodiversity includes all living things, from genes through species and populations to ecosystems.
It is the interactions within and between biodiversity and non. It is now widely recognized that climate change and biodiversity are interconnected. Biodiversity is affected by climate change, with negative consequences for human well-being, but biodiversity, through the ecosystem services it supports, also makes an important contribution to both climate-change mitigation and adaptation.