NEW SPECIES OF BOTTLENOSE DOLPHIN
Australian researchers have recently formally announced the discovery of a new dolphin species which is a type of Bottlenose Dolphin. The species was formally named Tursiops australis by the researcher who discovered the species, Kate Charlton-Robb of Monash University, and colleagues. The dolphin's common name, Burrunan, is an Aboriginal name in the Boonwurrung, Woiwurrung and Taungurung languages, meaning "large sea fish of the porpoise kind".The species name australis is the Latin adjective "southern".
The Burrunan dolphin was thought to be one of the two recognised species of bottlenose dolphin. Some differences had been noted, but for a long time there was not enough evidence to classify it as its own species. However, an examination of their skulls, external characteristics and DNA from old and current samples revealed unique characteristics which resulted in its classification as a separate species by researchers in a paper submitted on 27 January 2011 and published on 14 September 2011. It is the third time since the late 19th century that a new dolphin species has been recognised.
The Burrunan dolphin is dark bluish-gray at the top near to the dorsal fin extending over the head and sides of the body. Along the midline it is a lighter gray which extends as a blaze over on the side near the dorsal fin. Ventrally it is off-white, which reaches over the eye and the flipper in some instances. It is smaller than the Common bottlenose dolphin but larger than the Indo-Pacific bottlenose dolphin, measuring between 2.27–2.78 metres (7.4–9.1 ft) in length.Only two resident populations of the Burrunan dolphin have been identified, one in Port Phillip and the other in the Gippsland Lakes. Their combined population has been estimated as about 150 dolphins (100 in Port Phillip and 50 in Gippsland).
Additionally, T. australis haplotypes have been documented in dolphins located in waters off eastern Tasmania, and in coastal waters of South Australia in the Spencer Gulf region and west to St Francis Island. The initial report on the Burrunan dolphin suggested that the low volume of individuals found might immediately qualify the species for protection under the Environment Protection and Biodiversity Conservation Act.
The Burrunan dolphin was thought to be one of the two recognised species of bottlenose dolphin. Some differences had been noted, but for a long time there was not enough evidence to classify it as its own species. However, an examination of their skulls, external characteristics and DNA from old and current samples revealed unique characteristics which resulted in its classification as a separate species by researchers in a paper submitted on 27 January 2011 and published on 14 September 2011. It is the third time since the late 19th century that a new dolphin species has been recognised.
The Burrunan dolphin is dark bluish-gray at the top near to the dorsal fin extending over the head and sides of the body. Along the midline it is a lighter gray which extends as a blaze over on the side near the dorsal fin. Ventrally it is off-white, which reaches over the eye and the flipper in some instances. It is smaller than the Common bottlenose dolphin but larger than the Indo-Pacific bottlenose dolphin, measuring between 2.27–2.78 metres (7.4–9.1 ft) in length.Only two resident populations of the Burrunan dolphin have been identified, one in Port Phillip and the other in the Gippsland Lakes. Their combined population has been estimated as about 150 dolphins (100 in Port Phillip and 50 in Gippsland).
Additionally, T. australis haplotypes have been documented in dolphins located in waters off eastern Tasmania, and in coastal waters of South Australia in the Spencer Gulf region and west to St Francis Island. The initial report on the Burrunan dolphin suggested that the low volume of individuals found might immediately qualify the species for protection under the Environment Protection and Biodiversity Conservation Act.
No comments:
Post a Comment