Australia is gloomy octopus (Octopus tetricus) are doing a great job in expanding their range south of Tasmania. Credit: Alamy
Warming ocean temperatures are promoting Australia, with particular reclusive gloomy octopus to expand.
The heat-loving cephalopod, also known as the common Sydney octopus (Octopus tetricus), has expanded his area of the coast of New South Wales on the east coast of Australia down to the warmer waters off the coast of the northeastern coast of Tasmania, an island state about 150 miles (240 km) south of the mainland. Researchers mapped the sad, the extension of the offer and their results reported in a study published June 22 in the journal Scientific Reports.
The gloomy octopus, named for his droopy-looking white eyes, is a little bit bigger than a beach ball (80 cm or 31.5 inches) and has a tentacle span of 2 meters (6 feet), according to the Australian Museum. Historically, this creature’s range was limited to the rocky tidal shores of eastern Australia; that was true, until about the year 2000, when the octopuses were first found off the southern coast of the Australian state of Victoria, Deventer reported.
Scientists discovered that the width of the gloomy of the expansion of the offer thanks to the recreational fishermen and divers of their reporting cephalopod observations to Redmap. This citizen science project was created by study co-author Gretta Pecl, a marine ecologist at the University of Tasmania. “People send in photos of sightings,” Pecl told Oceana. “We get an early indication of what species can shift, and then we initiate a more focused research.”
The data from the citizen science project led to the new study of the Pecl and her colleagues, which confirms the gloomy octopus’ southern extension of the offer. And thanks to continued gene flow from the animals’ historic population — the meaning of genes from one population can be carried to another — and moderation of the genetic diversity of the species is likely to adapt nicely to the extensive habitat and can continue to expand its range, scientists predicted. [Photos: Octlantis: See the Photos of Close Gloomy Octopus Communities]
But while the gloomy octopus seems to be well adapted to her new home, the territory expansion of the fisheries experts worried. That is because this eight-demon, outsiders, love to chow down on shellfish such as abalone and rock lobster, which is the most profitable fisheries in the region, Deventer reported. Another predator is the last thing the struggling shellfish population after fighting the fatal marine heat waves caused by the increasingly warm currents.
An octopus fishery focused on the gloomies can be a win-win solution for fishermen and shellfish populations. Craig Hardy, a Tasmanian fisherman, told Oceana that the fishermen in the area have in the past caught smaller octopus species. But the larger size of the gloomies makes them a more attractive catch, he said.
The gloomy octopus is just the latest example of dozens of kinds of carried out south of the East Australian Current in the past few years, Deventer reported. The gloomy expansion is also part of a larger, growing trend of shifts in the wild animals territory caused by climate change.
Original article on Live Science.