Pink river dolphins of the Amazon


This 4 january 2019 video says about itself:

Pink River Dolphins Of The Amazon Rainforest‘s Hunting Secret | Earth’s Great Rivers | BBC Earth

Botos (pink river dolphins) have whiskers that help them find their prey in dark waters.

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Dolphin mother and unborn calf, video


This video says about itself:

Dolphin Mother Speaks to her Unborn Calf | BBC Earth

2 August 2018

Dolphin mothers can use their unique calls to let calves learn it before they’re born, so they will be able to follow them easily.

Dolphins greet new born baby


This 28 July 2018 BBC video says about itself:

When a new baby dolphin is born, his family reunites around him to welcome him as one of them.

In a stunning new insight into the lives of wild dolphins, this film follows six remarkable months in the life of the ‘Beachies’: a family of six dolphins led by mother-to-be Puck, who live in the shark-infested waters of Western Australia‘s Shark Bay. Using the latest miniature cameras to eavesdrop on the Beachies’ underwater lives, this moving story follows Puck and the challenges she faces bringing up her newborn calf Samu. From learning to fish, to the ever-present threat of a shark attack, no day is ever the same. Including rarely seen footage of young dolphins and revelatory new behaviour, this is a heart-warming and emotional portrayal of one of the ocean’s most revered creatures.

Dolphin liberation in Korea


This video says about itself:

22 June 2015

I found dolphins at Jeju island in KOREA.

From the Ulsan National Institute of Science and Technology (UNIST) in South Korea:

Dolphin liberation in Korea

May 27, 2018

Summary: Biologists have carried out a scientific investigation on dolphin liberation in South Korea.

“Dolphin liberation in South Korea has raised awareness towards the welfare of marine animals and has resulted in the strengthening of animal protection policies and the level of welfare.”

An engineering student, affiliated with UNIST has recently carried out a scientific investigation on dolphin liberation in South Korea. The paper presents the overall analysis of the social impact of the first case of dolphin rehabilitation in Asia, which occurred in 2013.

This study has been carried out by Sejoon Kim in the School of Energy and Chemical Engineering in collaboration wit Professor Bradley Tatar in the Division of General Studies at UNIST. Their findings have been published in the April issue of the journal Coastal Management and will be published online, this month.

“After the release of captive dolphins from South Korean marine parks, there has been a growing environmental movement towards the conservation and management of marine and coastal ecosystems“, says Sejoon. “Although such movement relies on a single-species conservation focus and does not encompass an entire ecosystem, it has enormous symbolic significance for the welfare of marine animals.”

The research team hopes to expand their research to areas beyond the study of dolphin liberation and carry out in-depth case studies on various topics, including the whale-eating culture in Ulsan, the public perspective of dolphin shows, as well as the establishment of new types of dolphin life experience facilities.

Bottlenose dolphins’ first time in Canadian Pacific


This video says about itself:

22 September 2016

This curious bottlenose dolphin (Tursiops truncatus) came over to see what ARC (Atlantic Reef Conservation) Reef Researchers were up to. Our research involved using a sonar imaging device, which the dolphin was fascinated with.

From BioMed Central:

Bottlenose dolphins recorded for the first time in Canadian Pacific waters

April 19, 2018

A large group of common bottlenose dolphins (Tursiops truncatus) have been spotted in Canadian Pacific waters — the first confirmed occurrence of the species in this area. The sighting is reported in a study published in the open access journal Marine Biodiversity Records.

On 29 July 2017, researchers from Halpin Wildlife Research, in collaboration with the Department of Fisheries and Oceans, Canada and the Department of Environment and Climate Change, Canada, observed a group of approximately 200 common bottlenose dolphins and roughly 70 false killer whales (Pseudorca crassidens). The sighting occurred off the west coast of northern Vancouver Island, British Columbia, Canada and may be the northern most recording for this species in the eastern North Pacific.

Luke Halpin, lead author of the paper, said: ‘It is surprising to find a warm-water dolphin in British Columbian waters, and especially to find such a large number of common bottlenose dolphins within the group.”

Halpin added: “The sighting is also the first offshore report of false killer whales in British Columbia. To see the two species traveling together and interacting was quite special and rare. It is known that common bottlenose dolphins and false killer whales seek each other out and interact, but the purpose of the interactions is unclear.”

Both common bottlenose dolphins and false killer whales typically live in warm temperate waters further south in the eastern North Pacific, but this sighting suggests that they will naturally range into British Columbia, Canada when conditions are suitable. There has been a warming trend in eastern North Pacific waters from 2013-2016 and the authors hypothesize that the trend may be the reason behind this unusual sighting.

Halpin adds: “Since 2014 I have documented several warm-water species: common bottlenose dolphins, a swordfish and a loggerhead turtle in British Columbian waters. With marine waters increasingly warming up we can expect to see more typically warm-water species in the northeastern Pacific.”

See also here.

Ancient dolphin species discovery in Ecuador


This video says about itself:

21 December 2017

A well-preserved juvenile skull recently discovered in Ecuador belongs to a new species of ancient dolphin, which researchers are calling Urkudelphis chawpipacha. The fossil was discovered near Montañita in Santa Elena Province, a tropical region of Ecuador, and is believed to be between 24 to 26 million years old.

From PLOS:

Ancient dolphin species Urkudelphis chawpipacha discovered in Ecuador

Small dolphin skull may have belonged to river dolphin ancestor from the Oligocene

December 22, 2017

Summary: An extinct dolphin species likely from the Oligocene has been discovered. The fossil is one of the few fossil dolphins from the equator, and is a reminder that Oligocene cetaceans may have ranged widely in tropical waters.

A new dolphin species likely from the Oligocene was discovered and described in Ecuador, according to a study published December 20, 2017 in the open-access journal PLOS ONE by Yoshihiro Tanaka from the Osaka Museum of Natural History, Japan, and colleagues.

Many marine fossils described in previous research have been from long-recognized temperate regions such as South Carolina, off the coast of Oregon, Hokkaido and New Zealand. Few equatorial and polar fossils are currently known.

While in the tropical region of Santa Elena Province, Ecuador, the authors of this study found a small dolphin skull, which they identified as representing a new species, Urkudelphis chawpipacha, based on facial features. The dolphin skull had a bone crest front and center on its face, above the eye sockets. This species stands apart from other Oligocene dolphins with its shorter and wider frontal bones located near the top of the head and the parallel-sided posterior part of its jaw. The authors also conducted a phylogenetic analysis which revealed that the new species may be the ancestor of the nearly-extinct Platanistoidea, or river dolphin, and may have lived during the Oligocene era.

The fossil is one of the few fossil dolphins from the equator, and is a reminder that Oligocene cetaceans may have ranged widely in tropical waters.

This study was supported by an UPSE project IN-P5-2016-1 for equipment at UPSE, and YT thanks support of a trip to Ecuador. This work has also been supported by the Agencia Estatal de Investigación (AEI) from Spain and the European Regional Development Fund of the European Union (CGL2016-76431-P) and the project CGL2015-68333 (MINECO/FEDER, UE).

Narwhal, dolphin news


This video says about itself:

Listen to a narwhal’s resting heartbeat | Science News

7 December 2017

Narwhals have a resting heart rate of about 60 beats per minute. Now researchers have observed narwhals’ heart rate dropping precipitously low when diving to escape from humans. As melting sea ice opens up the Arctic to more human activity, the mammals, known as “unicorns of the sea” for their single tusk, may be more exposed to the potentially harmful escape response, scientists say.

Narwhals react to certain dangers in a really strange way. ‘Unicorns of the sea’ fleeing humans show the physiological signs of also being frozen in fear. By Mariah Quintanilla, 2:41pm, December 7, 2017.

This video says about itself:

Science News – Whales & Dolphins Have “Human-Like” Societies

19 October 2017

AI eavesdrops on dolphins and discovers six unknown click types. Computer program picked out the noises from underwater recordings of 52 million echolocation signals. By Maria Temming, 2:00pm, December 7, 2017.