Commerson's Dolphin Facts
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Commerson's Dolphin Facts

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http://goo.gl/xAfYI - The Commerson's dolphin is also known as the Skunk Dolphin, Piebald Dolphin and Panda Dolphin. - Visit us: http://goo.gl/ZkZz7...

http://goo.gl/xAfYI - The Commerson's dolphin is also known as the Skunk Dolphin, Piebald Dolphin and Panda Dolphin. - Visit us: http://goo.gl/ZkZz7
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Commerson's Dolphin Facts Commerson's Dolphin Facts Presentation Transcript

  • COMMERSON’S DOLPHINCephalorhynchus Commersonii BIOEXPEDITION.COM
  • Anatomy ✤ It has a black head, dorsal fin, and fluke, with a white throat and body ✤ Commersons dolphins exhibit sexual dimorphism, as the female is typically larger than the male. ✤ They are able to move their head in most directions. ✤ This dolphin average 3.9-5.6 ft. and weigh up to 190 lb. BIOEXPEDITION.COM
  • Commersons Dolphin ✤ Also known as the ✤ Skunk Dolphin ✤ Piebald Dolphin ✤ Panda Dolphin ✤ The Commersons dolphin is one of 36 members of the Delphinidae family. BIOEXPEDITION.COM
  • Anatomy ✤ Blood circulation in the pectoral flippers adjusts to help maintain body temperature. ✤ Glands at the inner corners of the eye sockets secrete an oil that lubricates the eyes BIOEXPEDITION.COM
  • Anatomy ✤ They have approximately 29 to 30 pairs of pointed teeth in the upper and lower jaws. ✤ The rostrum and mandible are long and robust and the melon is small and flacid BIOEXPEDITION.COM
  • Habitat ✤ Most sightings are in the coastal regions near the mouths of bays and estuaries. ✤ There are two populations separated by 130° of longitude, or 8,500 km. ✤ The larger population is found in the Strait of Magellan and near the Falkland Islands BIOEXPEDITION.COM
  • Behavior ✤ Commersons Dolphins are very active and very fast swimmers. ✤ They are typically found alone or in small groups and on rare occasions have been observed in groups of 100 or more individuals. BIOEXPEDITION.COM
  • Behavior ✤ The majority of sightings occurred when the dolphins approached boats ✤ They are considered playful swimmers and often swim on their back BIOEXPEDITION.COM
  • Habitat ✤ They live in cold shallow waters, with temperatures ranging from 1˚ C to 16˚ C ✤ They prefer waters less than 656 ft. deep BIOEXPEDITION.COM
  • Feeding ✤ Commerson’s Dolphins consume many types of fishes, krill, squid, cuttlefish, crab and shrimp. ✤ These dolphins are primarily carnivores but are often opportunistic coastal feeders. BIOEXPEDITION.COM
  • Feeding ✤ Commersons dolphins are sometimes seen feeding alone, but they are commonly observed cooperatively feeding. ✤ An adult eat about 10% of their body weight in food daily. BIOEXPEDITION.COM
  • Reproduction ✤ Males reach sexual maturity at between 6-9 years and females between 5 and 9 years. ✤ Gestation period is about 12 months. ✤ The calves are born in the austral spring and early summer. BIOEXPEDITION.COM
  • Reproduction ✤ The calf range from 0.5 to 0.75 m in length and weigh 4.5 to 7.3 kg. ✤ Commersons dolphins generally live less than 10 years in the wild and around 18 years in captivity. BIOEXPEDITION.COM
  • Threats ✤ Natural predators may include killer whales, sharks and even leopard seals. ✤ The Commersons dolphin is the cetacean species most frequently taken in fishing nets off the coast of southern South America. BIOEXPEDITION.COM
  • Threats ✤ Some pollutants enter the ocean food chain and become concentrated in the bodies of Commersons dolphins and other marine predators. ✤ The IUCN lists Commersons Dolphin as Data Deficient in its Red List of Threatened Species ✤ About two dozen Commersons Dolphins live in aquariums around the world BIOEXPEDITION.COM
  • Find us... BioExpedition.com Facebook.com/bioexpedition Twitter.com/bioexpedition Youtube.com/bioexpedition Pinterest.com/bioexpedition Dolphins-world.com ✤ Copyright© Bioexpedition.com 2012