Blog Tags: Dolphins
Ocean Roundup: Dolphin Intelligence May Be Overestimated, Penguin Personalities To Help with Climate Change Adaption, and More
- It turns out that pollution and runoff may be having a much bigger impact on the Great Barrier Reef than previously thought. New research shows that pollution may be decreasing organisms’ ability to photosynthesize, thereby making it harder to absorb CO2. The Guardian
As a child, you may remember squealing and screaming when you were excited about something. It turns out that humans aren’t the only species that gets noisy when they’re happy: New research shows that whales and dolphins “squeal with delight” to express glee, too.
When you’re out swimming or surfing at the beach, have you ever wondered which ocean animals surrounding you have teeth? It turns out that sharks aren’t the only marine animals with teeth—a tool in some marine animals may be more widespread than you thought.
From hundreds of sharp, razor-blade-like teeth in great white sharks to the singular long, spiraled tooth on narwhales, teeth come in all shapes in sizes in marine ecosystems. This diversity is for good reason—some use their teeth to shred and slice prey, while others use their teeth more as a harpoon.
Bottlenose dolphins off the coast of Western Australia are stealing the spotlight from Aussie surfers, and are proving that humans aren’t the only ones capable of catching that perfect wave.
Atlantic dolphins are in danger, and Miranda Cosgrove needs your help to save them. Recently, she joined Oceana in Bimini, Bahamas to swim with Atlantic spotted dolphins and film a new public service announcement (PSA) about how seismic airguns could harm Atlantic dolphins.
“When I first entered the water, the dolphins were playing with each other, swimming side by side, and they were constantly singing to each other—I could hear it! After a while they started to approach me and I could feel them look me in the eye. It was one of the best experiences of my life,” said Cosgrove.
Oceana’s climate and energy campaign had an eventful April. In our ongoing effort to stop East Coast offshore drilling before it starts, we’ve been working hard to prevent the oil industry from taking the first step toward drilling: seismic airguns to explore for oil.
The specifics of seismic airgun testing are worth understanding if only because the oil industry seems to be counting on Americans’ lack of knowledge about this highly specific technology in order to get a foothold in some ocean areas that have been protected from drilling since the Reagan administration.
The dolphin drive hunt in Taiji, Japan has been at the center of animal activism for many years and now it has finally come to the center of science.
The dolphin drive in Taiji involves the corralling of dolphins into a cove for slaughter or to be removed and then sold to representatives from marine parks. An estimated 22,000 small whales, dolphins, and porpoises are killed in these hunts each year.
Dr. Andy Butterworth of the University of Bristol and colleagues have published a paper in the Journal of Applied Animal Welfare Science analyzing the methods used by Taiji fishermen to kill the dolphins in the drive hunts. Through their analysis, the authors have revealed disturbing levels of physical trauma inflicted on the dolphins, and commented that these methods would not be acceptable under any international animal welfare standards.
The paper has compared the information provided by the Japanese government on the dolphin slaughter with video footage of the methodology and concludes that the current methodology leads to prolonged trauma and paralysis, which contradicts the information in the government report.
The publication of this paper has raised awareness of the dolphin slaughter within the scientific community and has elevated the issue to a peer reviewed scientific journal, raising the profile of the travesty in Taiji. This added pressure from the scientific community, which validates the efforts of so many advocacy efforts, could be what is needed to convince the Japanese government to end these hunts for good.
Video of the slaughter is available but be prepared, it is extremely disturbing.
American photographer Doug Perrine, 60, captured this priceless image of a false killer whale mid-grin off the coast of Kona, Hawaii.
Less commonly known than the killer whale (or orca), the false killer whale is the third largest member of the oceanic dolphin family. Growing to 1,500 pounds and up to 20 feet long, the false killer whale looks like no dolphin you’ve seen before. Its small conical head lacks the “beak” we expect in common dolphins, and its flippers have a distinctive hump along the front edge.
False killer whales were first discovered by their fossils in 1843, and were assumed to be extinct. In fact, the species wasn’t discovered alive until fifteen years after the discovery of their fossils. Like the gregarious-looking fellow captured in the photo, false killer whales are intensely social, forming strong social bonds in groups of ten to twenty that belong to larger groups of up to 40 individuals in Hawaii or as many as 100 elsewhere. False killer whales travel and hunt together in broad bands that can be up to several miles wide, and they even share their food with other group members.
Unfortunately, the false killer whale’s population numbers in Hawaii are nothing to smile at – these social creatures have suffered major decline in the last 25 years. According to the National Marine Fisheries Service, aerial surveys showed about 400 false killer whales in 1989. More recent studies suggest the number today is closer to 150. As of November 2012, false killer whales were listed as endangered in Hawaii, due in large part to the creature’s vulnerability to be caught as bycatch by tuna and swordfish fisheries. The false killer whales become hooked or entangled in longlines when they take bait off of longline fishing hooks set for Hawaiian swordfish and tuna, a dangerous mistake that often turns deadly.
The future for false killer whales is in danger, but with education, advocacy, and increased respect and protections for these social and gregarious sea creatures, we can give the false killer whale something to smile about.
Just a few weeks ago, an international campaign to stop the annual gruesome slaughter of dolphins in Japan was initiated by one Scottish woman hoping to make a difference. Shona Lewendon started a petition to the International Olympic Committee (IOC) requesting that Japan be denied the right to host the 2020 Olympic Games until they ban the annual slaughter of dolphins in the cove of Taiji, a tradition that has been occurring for a long time.
Within just five days of posting her petition online, she received 10,000 signatures. Since then, the petition has continued to grow, gaining more and more support from people all around the world. Her campaign has even won the support of the Whale and Dolphin Conservation Society.
We can breathe a momentary sigh of relief. This Monday, the Pacific Fishery Management Council voted unanimously to maintain protections off California and Oregon for the critically endangered population of Pacific leatherback sea turtles. However, in 2014 these federal fishery managers will consider another proposal for allowing driftnets into sea turtle habitat southwest of Monterey, California.
At the meeting a few days ago in Tacoma, Washington, the Council considered a full array of proposals to expand the use of drift gillnets off California and Oregon and into an area currently designated to protect Pacific leatherback sea turtles. But Oceana—with the help of our partners, and support of our avid Wavemakers—successfully thwarted those efforts by presenting new science on the decline of leatherback sea turtles; by revealing scientific data showing massive wasteful bycatch of large whales, dolphins, sharks, and other fish by the drift gillnet fishery; and by bringing forward the public uproar over the proposed expansion of the driftnet fishery into a currently protected area.
Mile-long drift nets hang like invisible curtains in the water column to catch swordfish, but they unselectively entangle other marine life traversing through the open ocean. To numerically paint the portrait of this wasteful fishery, for every five swordfish caught in 2011, one marine mammal was killed and six fish were tossed back dead. When it comes to whales, this fishery takes many species, but one of particular concern is the sperm whale. The largest of the toothed whales, sperm whales have the largest brain of any animal and it is estimated that 16 of these amazing endangered whales were taken in the drift gillnet fishery in 2010 alone.
- Dusky Shark Saved from Fishing Gear: The Heartwarming Story of One Incredible Rescue (Photos) Posted Fri, November 14, 2014
- Oceana’s New Report Highlights Uses, Benefits of Global Fishing Watch Technology Posted Mon, November 17, 2014
- Video: Humpback Whales Cause Quite the Surprise As They Hunt for Herring Posted Wed, November 19, 2014
- Video: Learn How Global Fishing Watch Can be Used to Tackle Illegal Fishing Posted Fri, November 14, 2014
- Ocean Roundup: Humpback Whale Scars Can Reveal Migration Patterns, Sea Star Die-Offs Linked to Virus, and More Posted Tue, November 18, 2014