The geographical and ‘cultural’ differences map out the orcas of Australia

A new study has mapped the most important habitats for the orcas of Australia and thrown a new weight behind the theory. There are two different species in the waters of the country.

Collecting 1,310 observations by whale guards for four decades, researchers of whale -like ecology, behavior and evolutionary abbulated Orka species distributions from Flinders University and were able to locate three important areas.

In the south, the Bremer-Subbasin for the south coast of Western Australia and the Bonney Upolling for Southwest-Victoria were designated as important locations.

A population was also identified in the warmer northern waters for the Ningaloo rif of West -Australia.

Main researcher and PhD student, Melissa Hutchings, said that each region emphasized the various environmental preferences of the orca population of Australia.

“That of Ningaloo Reef, they are really attracted by those higher sea surface temperatures, strong productivity and environments from close by,” said MS Hutchings.

“While in the southwest and southeast they prefer lower sea surface temperatures, stronger currents and a lot of whim too.”

Two types of orcas

Mrs. Hutchings said their findings suggested that there were two ecologically different types of murderous whales in Australia.

They are moderate or tropical, based on their environmental preferences.

“As Apex Predator they will follow their prey aggregations, and then they will learn that this is a predictable source and they will start specializing in that particular habitat,” she said.

Mrs Hutchings said that further investigation was needed to guarantee sufficient protection for whales.

“Commercial fishing, marien tourism, offshore drilling, chemical pollutants – all these things can have an impact, even on the best predator of the ocean,” she said.

North-south distributed distributed

On Ningaloo Reef, the Orka season is on its way to a later than usual start, with some people who speculate that the delay can be a result of warmer-usual water temperatures.

The winter food group of the World Heritage site was only recently seen, warm on the trail of migrating humpbacks.

John Totterdell, a field biologist at Cetacean Research Center (Cetrec) WA, said it was the sensation of the hunt that the most distinguished tropical orcas like those in Ningaloo.

“Killer whales in Ningaloo, for example, have specialized in hunting humpback calves … they have a strategy that is really exactly,” he said.

‘The other they have [is] their individual dialect.

Dr. Genttterdell said that skills such as personality and family roles were also pronounced within the group, in which younger whales were prepared for the challenges of life in the ocean.

“It is quite difficult to earn a living if you are a murderous whale in the tropics,” he said.

“These humpbacks are here only a few months and part of the [orca] We have lost calves in recent years. “

The moderate orcas are found further south in the Bremer Bay region.

“The orcas in Bremer are offshore orcas who live in a really deep water environment, so they are on the continental plank that hunt between 700 and 2,000 meters everywhere,” said Marine -Biologist Jennah Tucker.

“They are known to hunt cooperative, especially in Bremer, it is the largest known aggregation of orcas in the southern hemisphere.

“In my time down there I was most seen that I worked together between 70 and 80 orcas.”