Good Australian dolphin news


This video from South Australia says about itself:

18 September 2012

The Adelaide Dolphin Sanctuary is one of the gems of metropolitan Adelaide. Located in the Port River and Barker Inlet, the sanctuary is just 20 minutes from the city centre and features a 10,000-year-old mangrove forest. A resident pod of about 30 bottlenose dolphins call the river home, while another 300 visit the area regularly.

To learn more about the Adelaide Dolphin Sanctuary, visit here.

Video filmed and produced by Hartwig Heller.

From Science News:

City dolphins get a boost from better protection and cleaner waters

by Sarah Zielinski

11:08am, November 3, 2016

There are many places in the world where you can see bottlenose dolphins, but the dolphins swimming in the Port River estuary near Adelaide, Australia, are special. They gambol about in waters surrounded by factories, power stations and other signs of human habitation.

For much of the 20th century, there were no dolphin sightings in the inner estuary. Prior to European settlement in 1858, bottlenose dolphins were commonly seen by the local Kaurna aboriginal tribal group. But as the city of Adelaide was built, the dolphins disappeared. What changed that enabled their return? A combination of improved environmental conditions, a little bit of protection and some public education, researchers report October 24 in Marine Mammal Science.

“The future of these dolphins would appear to be as secure as any population of any species can be in this era of climate change,” says the study’s lead author, Mike Bossley of Whale and Dolphin Conservation Australasia in Port Adelaide, who has studied the area’s dolphins for 25 years.

As the city of Adelaide grew, the Port River grew to be an unfriendly spot for marine wildlife. People cleared away the marshes and mangroves, replacing them with sulfuric acid and soda ash producers, sugar refineries and power stations. Sewage and storm water flowed into the river. Boats and ships traversed the estuary, which had become the main shipping port for the state of South Australia. And no one reported a dolphin sighting between 1940 and 1980.

Scientists began field studies in 1989 and started finding bottlenose dolphins — and documenting threats to them. In addition to pollution, any dolphins brave enough to traverse the Port River had to deal with boat strikes, infections, entanglement with nets and other marine trash and even deliberate attacks. In response, the Adelaide Dolphin Sanctuary was established by law in 2005, setting aside a small patch of river for the resident dolphin population (about 30 live in the river; another 300 visit the area regularly) and establishing resources for public education about the dolphins. And over the last few decades, water quality has improved as some of the least environmentally friendly activities — such as sulfuric acid production, salt evaporation and coal-fired power production — have ended.

In 1990, Bossley and his colleagues started surveying the Port River dolphins. The researchers would take their boat out on a 40-kilometer journey through the estuary, following the same path each time and photographing any dolphins they saw. They used distinguishing marks, such as shape or notches, on a dolphin’s dorsal fin to identify the animal and ensure each was only counted once.

From January 1990 to December 2013, the researchers made a total of 735 complete journeys, averaging one survey every 11.7 days. Based on those surveys, and the near absence of dolphins in the 1980s, the team estimates that bottlenose dolphin sightings are increasing by about 6 percent a year.

“The trends in sightings provide compelling evidence of a large change in some aspect of relative abundance and occupancy and usage of the Port River estuary,” the researchers write. The increase could be the result of an increase in the resident population, in the number of visiting dolphins or a combination of both.

Improved water quality may be better for the dolphins or their prey. Plus, the establishment of the sanctuary gave the dolphins some protection against human activities. In addition, Bossley notes, “by designating the area as a sanctuary, the public is both more aware and more protective of the dolphins.” The dolphins still have to deal with human impacts — the river is not pollution free, an attack occurred as recently as 2014 and there’s a growing new potential threat in the form of tourism — but the dolphins appear to be able to cope.

The Adelaide dolphins offer a lesson in conservation, Bossley and his colleagues note. Corralling off large areas for wildlife from human activities isn’t always necessary. “People have to learn to live with wildlife,” Bossley says. And that “requires taking into account both the wildlife itself and its habitats.”

Baltic sea dolphin swims with humans, video


This 11 September 2016 video from Kiel, Germany, shows a bottlenose dolphin swimming with humans in the Baltic sea.

Humpback whale in Baltic sea: here.

1,000 dolphins flee killer whales, video


This video from California in the USA says about itself:

Killer Whales Ambush A Pod of 1,000 Dolphins

14 April 2016

This was an incredible encounter. I just happened to be in the right spot at the right time. It’s very rare that everything comes together and we’re able to document these types of encounters. We know it happens regularly with the common dolphins. But there’s rarely someone there with their video camera focused and waiting for it to happen. Incredible morning on The Monterey Bay for me.

Dolphins off Cornwall, video


This video from Britain says about itself:

Dolphins Near Portreath in Cornwall UK

Filmed on March 25th 2016

Video Produced by Paul Dinning – Wildlife in Cornwall

Many dolphins off California coast


This video from the USA says about itself:

10 March 2016

Whale watchers aboard a catamaran with Captain Dave’s Dolphin and Whale Safari in Dana Point experienced a once in a lifetime thrill when hundreds of common dolphins, without warning or provocation, began porpoising at high speed out of the water. Often referred to as a dolphin stampede, this breathtaking behavior can happen at any time and without any apparent cause. Porpoising is the fastest mode of travel for dolphins because there is less resistance in air than water.

Southern California has the greatest density of dolphins per square mile, [more] than anywhere else on earth. This includes nearly 450,000 common dolphins, the species in this video. Dana Point is one of the best places in the world to see large mega-pods that can number … up to 10,000.

Bottlenose dolphins in the Baltic Sea


This video is about bottlenose dolphins in the the Bay of Biscay.

From Deutsche Welle in Germany:

Bottlenose dolphins in Baltic waters?!

19.02.2016

A pair of bottlenose dolphins have been cruising the Baltic Sea recently. They’re not native to those waters, and must have come in from the North Atlantic. They’ve now developed a fondness for bow-wake cruising.

What scuba divers would be used to seeing in the waters of the Flensburg Fjord – in the westernmost part of the Baltic Sea near the northern German town of Flensburg on the Danish border – can be summed up in two very short words: Not much. But over the past couple of months, divers and boaters have been astonished to find themselves accompanied on occasion by a couple of playful bottlenose dolphins.

On Thursday this week (18.02.2016), a kayaker and a diver spent some quality time with “Selfie” and “Delfie,” as the dolphins have come to be called. Last summer, the pair played in the bow-wake of a tourist boat off the south coast of Sweden. Their maneuvers have become a local sensation. …

“It’s pretty special having this dolphin species here,” said Harald Benke, director of the German Ocean Museum Stralsund, who wrote his PhD about whales and dolphins. Common dolphins or white-beaked dolphins have occasionally been seen in Baltic waters, according to Benke – but bottlenose dolphins, almost never.

Since record-keeping began, there have been only three previous sightings of bottlenoses, the marine biologist said: A dead bottlenose was found floating in the waters near Stralsund in 1842, and another near Lübeck in 1882.

In 1852, a pod of bottlenoses was seen swimming in the shallow waters near Greifswald. Other than those three incidents, all has been quiet on the bottlenose-dophin-spotting front in the Baltic Sea over the past couple of centuries.

The two bottlenoses now cruising the Baltic must have entered from the Atlantic nearly a year ago. They spent the summer off Kalmar in southern Swedish waters, where they were also a hit with tourists.

Striped dolphins stranded on Ameland island


Beached striped dolphin on Ameland, photo by Natuurcentrum Ameland/Johan Krol

Translated from NOS TV in the Netherlands, 20 January 2016:

Striped dolphins washed up on Ameland

On Ameland yesterday two striped dolphins washed ashore. Hikers saw the animals lying around 23:00. They were already dead. They are females, a mother and a daughter.

Striped dolphins are rarely observed in the North Sea. Usually they remain in warmer waters. To our knowledge nine times previously striped dolphins beached on the Dutch coast, says biologist Johan Krol of the Ameland Nature Centre.

The animals were today moved to Utrecht University. There, they are examined to find out why they died.

Omrop Fryslân reports that the mother was about two meter long, her daughter one meter. After Utrecht University, they will go to Naturalis museum in Leiden, where they will be cleaned. Then, they will return to Ameland, where the Ameland Nature Centre will exhibit their skeletons.