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Ysying asked in 環境其他 - 環境 · 1 decade ago


如題,但要用英文!!而且要簡短...因為要做powerpoint (功課)



Over fishing

Loss of home


Vessel collision




1 Answer

  • 1 decade ago
    Favorite Answer

    Dolphins are aquatic mammals that are closely related to whales and porpoises. There are almost forty species of dolphin in seventeen genera. They vary in size from 1.2 metres (4 ft) and 40 kilograms (88 lb) (Maui's Dolphin), up to 9.5 m (30 ft) and ten tonnes (the Orca or Killer Whale). They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating fish and squid. The family Delphinidae is the largest in the Cetacea, and relatively recent: dolphins evolved about ten million years ago, during the Miocene. Dolphins are considered to be amongst the most intelligent of animals and their often friendly appearance and seemingly playful attitude have made them popular in human culture.

    2008-05-30 17:35:35 補充:



    1 Origin of the name

    2 Taxonomy

    2.1 Hybrid dolphins

    3 Evolution and anatomy

    3.1 Evolution

    3.2 Anatomy

    3.3 Senses

    4 Behaviour

    4.1 Social behaviour

    4.2 Reproduction and sexuality

    4.3 Feeding

    2008-05-30 17:36:48 補充:

    Various methods of feeding exist, not just between species but also within a species various methods may be employed, some techniques being used by only a single dolphin population.

    2008-05-30 17:37:37 補充:

    One feeding method employed by many species is herding, where a pod will control a school of fish while individual members take turns plowing through the school, feeding. The tightly packed school of fish is commonly known as bait ball.

    2008-05-30 17:38:17 補充:

    Reports of cooperative human-dolphin fisheries date back to the ancient Roman author and natural philospher Pliny.[19] A modern human-dolphin fishery still takes place in Laguna, Santa Catarina, Brazil.[20]

    2008-05-30 17:38:31 補充:

    4.4 Vocalizations

    4.5 Jumping and playing

    5 Threats to dolphins

    5.1 Natural threats to dolphins

    5.2 Human threats to dolphins

    2008-05-30 17:38:43 補充:

    6 Human-dolphin relationships

    6.1 Mythology

    6.2 Therapy

    6.3 Entertainment

    6.4 Military

    6.5 Literature

    6.6 2007: Year of the Dolphin

    7 References

    8 External links

    2008-05-30 17:38:46 補充:


    Common Dolphin

    Bottlenose Dolphin

    Spotted Dolphin

    Commerson's Dolphin

    Dusky Dolphin

    Killer Whales, also known as Orcas

    The Boto, or Amazon River Dolphin

    p to the beach to capture sea lions.

    Source(s): 我自己, me, me
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