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Dolphins.

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Presentation on theme: "Dolphins."— Presentation transcript:

1 dolphins

2 About How Long Can Bottlenose Dolphins Breath Underwater ?
Dolphins usually stay underwater for about 30 sec to 2min. with a maximum of up to 6 to 10 min.

3 The Sad Truth Every year, all around the world, it is estimated that three hundred thousand whales,. dolphins and porpoises become accidentally caught and die in fishing nets . Thousands of dolphins die in UK and other European waters when they get caught in nets How fishing is endangering whales, dolphins and porpoises - WDC

4 Dolphins are about 2.5m maximum & around 200kg.
How Big is a Dolphin? Dolphins are about 2.5m maximum & around 200kg.

5 How Long Do Dolphins live?
Male dolphins live for around 40 years, while females live longer.

6 Will dolphins attack a shark and why?
Generally dolphins will not attack sharks, but in a group sometimes they have done it. They can be curious of sharks or feed in the same area and are more likely to be attacked by them. Some large sharks feed on Bottlenose Dolphins.

7 Are dolphins related to whales?
Yes, dolphins & whales are both cetaceans and very closely related. Orcas are the biggest of the dolphins.

8 Do dolphins sleep? If so, how?
No, dolphins rest half of their brain for a few minutes at a time so they can surface and take a breath. Anesthetic kills them.

9 How fast can dolphins swim?
Bottlenose dolphins: knots; offshore Common Dolphins: knots.

10 32 Types The Bottlenose dolphin, the Killer Whale, the Common dolphin, the False Killer Whale, the Hector's dolphin, the Short-Finned Pilot Whale, the Commerson's dolphin, the Long-Finned Pilot Whale, the Black dolphin, the Atlantic Humpbacked dolphin, the Haeviside's dolphin, the Indo-Pacific Humpbacked dolphin, the Southern Right Whale dolphin, the Tucuxi, the Northern Right dolphin, the Pygmy Killer Whale, the Spotted dolphin, the Melon-Headed Whale, the Atlantic Spotted dolphin, the Irrawaddy dolphin, the Striped dolphin, the Rough-Toothed dolphin, the Spinner dolphin, the Risso's dolphin, the Clymene dolphin, the Fraser's dolphin, the White-Beaked dolphin, the Peale's dolphin, the Atlantic White-Sided dolphin, the Hourglass dolphin, the Pacific White-Sided dolphin and the Dusky dolphin.

11 Pink dolphins http://www.dolphins-world.com/pink-amazon-river-dolphin/
Pink dolphins are not the same dolphins that you would see in the ocean; they have special adaptations to their habitat. In fact, river dolphins are only distantly related to sea dolphins. They belong taxonomically speaking to different families. The oceanic dolphins belong to the family delphinidae while river dolphins belong to the family Platanistoidea as we said above. Among the five species of river dolphins, Amazon pink dolphins are considered the most intelligent of them, with a brain capacity 40% larger than that of humans. Pink dolphins inhabit the Amazon River, but they can also be found in the Orinoco basins and the upper Madeira River as well. While they are mostly pink, these dolphins have various colored skins, which can be light gray, pink, or brown. The Amazon River pink dolphins conform the largest population of river dolphins in existence as the other four species are functionally extinct or close to extinction.

12 Orcas Orcas, or killer whales, are the largest of the dolphins and one of the world's most powerful predators. They feast on marine mammals such as seals, sea lions, and even whales, employing teeth that can be four inches (ten centimeters) long. They are known to grab seals right off the ice.

13 The Long-Finned Pilot Whale
The long-finned pilot whale is not actually a whale, but a dolphin. Along with the related short-finned pilot whale, this species was once called a 'pothead', as the bulbous head was thought to resemble a black cooking pot by the early whalers that first encountered the species. The Latin name of this genus, Globicephala, meaning 'globe head' also refers to the shape of the head. The stocky body is black or dark grey in colour with a white stripe passing diagonally behind the eye, a greyish area on the belly, and an anchor-shaped grey patch on the chin

14 The Common Dolphin The short-beaked common dolphin (Delphinus delphis) is the commonest dolphin species, but exact numbers are unknown. It is easily identified owing to the obvious 'hourglass' pattern on the flanks, which creates a dark V-shape below the dorsal fin. Considerable variation in colours and patterns exists within this species, and in 1994 a new species, the long-beaked common dolphin was recognised, based on both anatomical and genetic differences.

15 The Black Dolphin The Black dolphin (scientific name: Cephalorhynchus eutropia), is more commonly known as the Chilean dolphin, is only found in freshwater estruaries, and coastal areas surrounding Chile. It is a marine mammal, a member of the family Delphinidae, part of the order of cetaceans. The species is so named for its black coloring on its fins, tail, and back. It is also known as the Chilean dolphin, Piebald dolphin, Southern dolphin, and White-bellied dolphin.

16 How fishing is endangering whales, dolphins and porpoises - WDC
The End How fishing is endangering whales, dolphins and porpoises - WDC References


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