Monday, July 30, 2007

Rough-toothed dolphin fact sheet

The rough-toothed dolphin gets its name from the thin vertical wrinkles that run down the length of their teeth. They can be identified by their sloping head and long beak. Rough-toothed dolphins are not well studied, but they are known to exist in tropical to warm waters of the world’s oceans. They seem to favour offshore waters beyond the continental shelf. Rough-toothed dolphins usually travel in groups of 10 – 20, but group sizes of 50 or more have been observed. They are strong swimmers that often swim with the tip of their beak and chin out of the water.

In the Azores, rough-toothed dolphins are encountered only very rarely. In August 2010 a group was sighted, the first time since 1995. The recent sighting was made south of Pico Island by the team of Espaço Talassa. During this rare sighting almost 50 individuals were observed.

• Male: 2.8 m
• Female: 2.65 m
• Calf: 1 m

Male: 160 kg

Global population: c.150,000 (population trend unknown)

Status: Least Concern

Diet: Fish, squid, octopus

Teeth: 80 – 108

Longevity: Unknown

Breeding age: Unknown

Gestation: Unknown

Nursing: Unknown

In other languages
Portuguese: Caldeirao
Spanish: Delfín de hocico estrecho, dientes rugosos
French: Dauphin à bec étroit
Italian: Steno
German: Rauhzahndelfin
Dutch: Snaveldolfijn
Swedish: Näbbdelfin
Norwegian: Stroppetannet delfin
Danish: Rutandede Delfin 
Finnish: -
Polish: Steno długonosy
Russian: Grebnezubyi delfin

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