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海龟

事实

在超过1亿年的时间里,海龟已经覆盖了世界各大洋的广阔距离,在海洋栖息地的平衡中发挥着至关重要的作用。

  • 状态
    濒危
  • 科学名称
    Cheloniidae和Dermochelyidae科
  • 长度
    2-6英尺
  • 栖息地
    开阔水域和海岸
Olive Ridley sea turtle (Lepidochelys olivacea) on the beach in Punta Banco, Costa Rica

+$Seven different species of sea (or marine) turtles grace our ocean waters, from the shallow seagrass beds of the Indian Ocean, to the colorful reefs of the Coral Triangle and the sandy beaches of the Eastern Pacific. While these highly migratory species periodically come ashore to either bask or nest, sea turtles spend the bulk of their lives in the ocean. WWF's work on sea turtles focuses on five of those species: green, hawksbill, loggerhead, leatherback, and olive ridley.

+$Over the last 200 years, human activities have tipped the scales against the survival of these ancient mariners. Slaughtered for their eggs, meat, skin, and shells, sea turtles suffer from poaching and over-exploitation. They also face habitat destruction and accidental capture—known as bycatch—in fishing gear. Climate change has an impact on turtle nesting sites; it alters sand temperatures, which then affects the sex of hatchlings. Nearly all species of sea turtle are now classified as endangered, with three of the seven existing species being critically endangered.

+$WWF is committed to stopping the decline of sea turtles and works for the recovery of the species. We work to secure environments in which both turtles and the people that depend upon them can survive.

查看我们的海龟图

海龟、老虎和更多的物种在全球野生动物会议上得到更多的保护。

世界各国政府最近聚集在一起讨论野生动物贸易对物种的威胁。

Hawksbill turtle swimming underwater in North Madagascar.

为什么他们很重要

  • 海洋生态系统的基本联系

    +$Sea turtles are a fundamental link in marine ecosystems. They help maintain the health of seagrass beds and coral reefs that benefit commercially valuable species such as shrimp, lobster, and tuna. Sea turtles are the live representatives of a group of reptiles that have existed on Earth and traveled our seas for the last 100 million years. Turtles have major cultural significance and tourism value. Five of the seven species are found around the world, mainly in tropical and subtropical waters. The remaining two species, though, have relatively restricted ranges: Kemp's ridley is found mainly in the Gulf of Mexico and the flatback turtle around northern Australia and southern Papua New Guinea.

威胁

  • 灭绝风险濒危
    1. EX
      绝种

      毫无疑问,最后一个人已经死亡

    2. EW
      野外绝种

      只知道在种植,圈养或归化人口中存活

    3. CR
      极度濒危

      面临野外濒临灭绝的极高风险

    4. EN
      濒危

      面临野外濒临灭绝的高风险

    5. VU
      弱势

      面临野外濒临灭绝的高风险

    6. NT
      接近受威胁

      可能在不久的将来有资格获得受威胁的类别

    7. LC
      最不需要担心的

      不符合极度濒危,濒危,易受伤害或接近受威胁的资格

Loggerhead turtle (Caretta caretta) trapped in an abandoned drifting net, Balearic Channel, Mediterranean sea.

+$Sea turtles journey between land and sea and swim thousands of ocean miles during their long lifetimes. They wait decades until they can reproduce, returning to the same beaches where they were born to lay their eggs. Females can lay hundreds of eggs in one nesting season, yet few will yield hatchlings that survive their first year of life. Beyond these significant natural challenges, sea turtles face multiple threats caused by humans, such as bycatch in commercial fishing gear, illegal trade, consumption, and climate change.

误捕

+$Worldwide, hundreds of thousands of sea turtles are accidentally caught in shrimp trawl nets, on longline hooks and in fishing gill nets every year. They become fisheries' bycatch—animals accidentally caught in nets intended for other species.

+$Sea turtles need to reach the surface to breathe and therefore many drown once caught. Incidental capture by fishing gear is the greatest threat to most sea turtles, especially endangered loggerheads, greens, and leatherbacks. This threat is increasing as fishing activity expands.

过度捕捞和非法贸易

海龟继续以不可持续的方式收获,用于人类消费和零件贸易。海龟肉和蛋是世界各地许多人的食物和收入来源。有些人还会因为药物和宗教仪式而杀死海龟。每年都有成千上万的海龟以这种方式迷失,已经濒临灭绝的绿色植物和玳瑁。

+$Killing of turtles for both domestic and international markets continues as well. International trade in all sea turtle species and their parts is prohibited under the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), a global agreement among governments to regulate or ban international trade in species under threat. Still, illegal trafficking persists.

栖息地的丧失

+$Sea turtles are dependent on beaches for nesting. Uncontrolled coastal development, vehicle traffic on beaches, and other human activities have directly destroyed or disturbed sea turtle nesting beaches around the world. For example, lights from roads and buildings disorient hatchlings away from the sea, and vehicle traffic on beaches compacts the sand, making it impossible for female turtles to dig nests. Turtle feeding grounds such as coral reefs and seagrass beds are damaged and destroyed by activities onshore, including sedimentation from clearing of land and nutrient run-off from agriculture. Beach restoration projects for protecting seaside buildings have also been found to be harmful, through dredging and sand filling.

气候变化

+$All stages of a sea turtle's life are affected by environmental conditions such as temperature—even the sex of offspring. Unusually warm temperatures caused by climate change are disrupting the normal ratios, resulting in fewer male hatchlings.

+$Warmer sea surface temperatures can also lead to the loss of important foraging grounds for sea turtles, while increasingly severe storms and sea level rise can destroy critical nesting beaches and damage nests.

污染

+$Sea turtles can mistake floating plastic materials for jellyfish and can choke on them when they try to eat them. These encounters are often fatal. Lost or discarded fishing gear—called ghost gear—entangles sea turtles and can drown or render a turtle unable to feed or swim. Trash on beaches can trap hatchlings and prevent them from reaching the ocean. Oil spills also poison sea turtles of all ages.

世界自然基金会在做什么

+$WWF works around the world to eliminate sea turtle bycatch from fisheries, reduce the unsustainable harvest and illegal trade in sea turtles, and stem the loss of critical sea turtle habitats. Many of these objectives are achieved by establishing and strengthening protected areas around nesting beaches, raising awareness and promoting ecotourism, lobbying for turtle-friendly fishing practices, and more.

消除兼捕

+$WWF aims to reduce turtle bycatch by working with fisheries to switch to more turtle-friendly fishing hooks ("circle" hooks). We advocate for the use of special turtle excluder devices in nets. WWF has worked with the National Oceanic and Atmospheric Administration (NOAA) to develop lights to reduce the bycatch of turtles in gill nets. These lights have been shown to reduce turtle bycatch by 60%-70%, and we are working to introduce them to fisheries around the world. WWF also tracks turtle movements using satellites to help prevent future interactions between fisheries and turtles and work with fishermen to help them save turtles caught in fishing gear.

Circle Hook

解决过度捕捞和非法贸易问题

+$WWF works with local communities to reduce turtle harvesting and egg collection. Because exploitation of turtles is often driven by a lack of economic choices, we help develop alternative livelihoods so that local people are no longer dependent on turtle products for income. WWF also supports programs that promote the value of sea turtles. WWF works through TRAFFIC, the wildlife trade monitoring network, to stop the illegal trade of turtle shells, meat, and eggs. We also train and equip local rangers to patrol turtle nesting beaches and protect against poaching.

+$WWF has been supporting a campaign led by TRAFFIC to combat illegal trade from the Coral Triangle and reduce demand in China. Activities include better training for law enforcement officials in both areas and a public awareness campaign in China, targeting areas where turtle trade is the highest. Radio broadcasts and advocacy events spread the message among local fishermen, souvenir shop owners, and tourists about the problem of turtle trade.

在所罗门群岛西部,世界自然基金会在整个海龟筑巢和孵化季节为海滩上的当地护林员提供支持,以防止采摘和狩猎。护林员收集重要数据并告知他们的社区有关保护海龟的法律。

保护海龟栖息地

+$WWF works around the world to establish marine protected areas, ensuring sea turtles have a safe place to nest, feed, and migrate freely. We encourage governments to strengthen legislation on, and provide funding for, sea turtle protection. WWF supports local turtle conservationists in many parts of the world to monitor and patrol turtle nests. These efforts often lead to ecotourism opportunities and offer alternative livelihoods.

尽量减少气候变化的影响

+$WWF studies how sea turtles are being affected by climate change and helps determine the best ways to reduce their vulnerability to changing environmental conditions. We work around the world with communities to monitor and protect nesting beaches, helping turtles be more resilient to the future impacts of climate change. In the Eastern Pacific and Caribbean, we work to raise awareness of the threat of sea level rise on nest sites and the importance of shade for nests.

卫星跟踪

+$Satellite telemetry allows researchers to track sea turtles as they swim from place to place. These satellite tags do not harm the turtles in any way and are designed to eventually fall off. The data will tell us where important feeding areas are, help us understand migration patterns and anticipate where turtles may come in contact with fisheries and their gear. These projects include tracking of hawksbill turtles in Malaysia; leatherback turtles in Panama, Suriname, French Guiana, Uruguay, Indonesia, and Gabon; loggerhead turtles in Cape Verde; green turtles in Cambodia; and olive ridley turtles in Australia.

相关物种



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