Initial studies of small cetaceans in Madagascar and Gabon: Recent
... • Perturbation of Antarctic Ecosystem – Humpback and True Blue Whales ...
... • Perturbation of Antarctic Ecosystem – Humpback and True Blue Whales ...
Marine Mammals in Madagascar
... • Perturbation of Antarctic Ecosystem – Humpback and True Blue Whales ...
... • Perturbation of Antarctic Ecosystem – Humpback and True Blue Whales ...
vocabulary - Secret Garden and Dolphin Habitat
... Unique characteristic that helps an animal to survive in its habitat. AQUATIC Living mostly in water. BALEEN Plates from two to twelve feet long, and sometimes a foot wide, which in certain whales, are attached side by side along the upper jaw, and form a fringelike sieve by which the food is retain ...
... Unique characteristic that helps an animal to survive in its habitat. AQUATIC Living mostly in water. BALEEN Plates from two to twelve feet long, and sometimes a foot wide, which in certain whales, are attached side by side along the upper jaw, and form a fringelike sieve by which the food is retain ...
Dolphin or Porpoise? - Pace University ePortfolio
... back to the dolphins. Dolphins listen for the strength of the rebounding clicks to identify what the object is and its distance from them. This is known as echolocation. Cetaceans ...
... back to the dolphins. Dolphins listen for the strength of the rebounding clicks to identify what the object is and its distance from them. This is known as echolocation. Cetaceans ...
What are dolphins? Adapted for water A sixth sense Dolphin social
... Dolphins have a sixth sense that we are missing: echolocation. They produce sounds in their nasal cavities that are sent out through the melon, their fat-filled forehead. These sounds bounce off an object and return as an echo to the animal through its fat-filled jaw. The sound then moves to the ear ...
... Dolphins have a sixth sense that we are missing: echolocation. They produce sounds in their nasal cavities that are sent out through the melon, their fat-filled forehead. These sounds bounce off an object and return as an echo to the animal through its fat-filled jaw. The sound then moves to the ear ...
Bolivia enacts law to protect Amazon pink dolphins
... Bolivian President Evo Morales has enacted a law aimed at protecting a unique species of dolphins that live in the country's Amazon rivers. The new legislation bans fishing freshwater pink dolphins and declares the species a national treasure. At a ceremony along the shores of the Ibare river, Presi ...
... Bolivian President Evo Morales has enacted a law aimed at protecting a unique species of dolphins that live in the country's Amazon rivers. The new legislation bans fishing freshwater pink dolphins and declares the species a national treasure. At a ceremony along the shores of the Ibare river, Presi ...
Dolphin
Dolphins are a widely distributed and diverse group of fully aquatic marine mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates, and their closest living relatives are the hippopotamuses, having diverged about 40 million years ago.Dolphins range in size from the 1.7 metres (5.6 ft) long and weigh only 50 kilograms (110 lb) Maui's dolphin to the 9.5 metres (31 ft) and 10 metric tons (11 short tons) killer whale. Several species exhibit sexual dimorphism, in that the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at 55.5 kilometres per hour (34.5 mph). Dolphins use their conical shaped teeth to capture fast moving prey. They have well-developed hearing − their hearing, that is adapted for both air and water, is so well developed that some can survive even if they're blind. Some species are well adapted for diving to great depths. They have a layer of fat, or blubber, under the skin to keep warm in the cold water.Although dolphins are widespread, most species prefer the warmer waters of the tropic zones, but some, like the right whale dolphin, prefers colder climates. Dolphins feed largely on fish and squid, but a few, like the killer whale, feed on large mammals, like seals. Male dolphins typically mate with multiple females every year, but females only mate every two to three years. Calves are typically born in the spring and summer months and females bear all the responsibility for raising them. Mothers of some species fast and nurse their young for a relatively long period of time. Dolphins produce a variety of vocalizations, usually in the form of clicks and whistles.Dolphins are sometimes hunted in places like Japan, in an activity known as dolphin drive hunting. Besides drive hunting, they also face threats from bycatch, habitat loss, and marine pollution. Dolphins have been depicted in various cultures worldwide. Dolphins occasionally feature in literature and film, as in the Warner Bros film Free Willy. Dolphins are sometimes kept in captivity and trained to perform tricks, but breeding success has been poor and the animals often die within a few months of capture. The most common dolphins kept are the killer whales and bottlenose dolphins.