Tag Archives: Marine Animals

Violent battle playing out to save the last 22 vaquitas, the world’s most endangered porpoise

vaquita
The rarest of marine mammals: the vaquita, a species of porpoise. Photo source: Here & Now – Barbara Taylor / NOAA

Excerpts;

Experts said that at most only 22 vaquitas remain in the Gulf of California, where a grim, increasingly violent battle is playing out between emboldened fishermen and the last line of defense for the smallest and most endangered porpoise in the world…

Read Full Article; CBS News (03-07-2019)

Sea mammal on brink of extinction targeted by “mafias” in Baja, Mexico; CBS News (07-30-2018)
There’s a crisis going on in the Pacific Ocean as an innocent porpoise falls prey to money and greed. The Vaquita is only about 4 feet long, weighs less than 100 lbs and calls the waters off the coast of Baja, Mexico home. With fewer than 30 left, it’s the most endangered marine mammal in the world…

Fish Poachers Push Endangered Porpoises to Brink, Yale E360 (03-05-2016)
China’s lucrative black market for fish parts is threatening the vaquita, the world’s most endangered marine mammal. The porpoises, who live only in the Gulf of California, are getting caught up as bycatch in illegal gill nets and killed. Scientists fear the porpoise could vanish by 2018…

Scientists Find Mystery Killer Whales off Cape Horn, Chile


A rare photo of Type D killer whales showing their blunt heads and tiny eyepatches. Credit: J.P. Sylvestre, South Georgia, 2011. Genetic samples the team collected will help determine whether this animal, with its distinctly different color pattern and body shape, is indeed new to science.

Excerpts;

In January 2019, an international team of scientists working off the tip of southern Chile got their first live look at what might be a new species of killer whale. Called Type D, the whales were previously known only from a beach stranding more than 60 years ago, fishermen’s stories, and tourist photographs.

Genetic samples the team collected will help determine whether this animal, with its distinctly different color pattern and body shape, is indeed new to science.

“We are very excited about the genetic analyses to come. Type D killer whales could be the largest undescribed animal left on the planet and a clear indication of how little we know about life in our oceans,” said Bob Pitman, a researcher from NOAA Fisheries’ Southwest Fisheries Science Center in La Jolla, California.

The team’s encounter with the distinctive whales came after they spent more than a week at anchor, waiting out the perpetual storms of Cape Horn off southern Chile. It was here that the scientists collected three biopsy samples—tiny bits of skin harmlessly taken from the whales with a crossbow dart—from a group of Type D killer whales.

Into the Laboratory

Unraveling the secrets of these unique killer whales has now moved from the blustery Southern Ocean to the laboratory, where NOAA scientists will analyze DNA from the skin samples. “These samples hold the key to determining whether this form of killer whale represents a distinct species,” said Pitman.

The first record of the unusual killer whales came in 1955, when 17 animals stranded on the coast of Paraparaumu, New Zealand. Compared to other killer whales, they had more rounded heads, a narrower and more pointed dorsal fin, and a tiny white eyepatch; no whales like this had ever been described before.

Initially, scientists speculated that the unique look might have been a genetic aberration only seen in those stranded whales. Then, in 2005, a French scientist showed Pitman photographs of odd-looking killer whales that had taken fish from commercial fishing lines near Crozet Island in the southern Indian Ocean. They had the same tiny eye patches and bulbous heads.

The location, a quarter of the way around the world from New Zealand, suggested that relatives of the stranded whales might in fact be widespread.

Burgeoning tourism in Antarctica has since produced wildlife photographs in unprecedented quality and quantity. To monitor the distribution, movements, and abundance of killer whales in Antarctic waters, Pitman and colleagues, including members of the International Association of Antarctica Tour Operators, began to collect killer whale images from the Southern Ocean…

Read Full Article; NOAA (03-07-2019)

Ecosystem changes following loss of great white sharks

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Great white shark. Photo source: ©© Elias Levy

Excerpts;

A new study has documented unexpected consequences following the decline of great white sharks from an area off South Africa. The study found that the disappearance of great whites has led to the emergence of sevengill sharks, a top predator from a different habitat…

Read Full Article; Science Daily (02-13-2019)

Study reveals island formation a key driver of penguin speciation

galapagos-iguana
Galapagos. Photograph: © SAF — Coastal Care

Excerpts;

Ever since Darwin first set foot on the Galapagos, evolutionary biologists have long known that the geographic isolation of archipelagos has helped spur the formation of new species. Now, an international research team has found the same holds true for penguins.

They have found the first compelling evidence that modern penguin diversity is driven by islands, despite spending the majority of their lives at sea…

Read Full Article; Science Daily (02-05-2019)

Japan confirms it will quit IWC to resume commercial whaling


Photo courtesy of Multi Award-Winning Filmmaker: © Denis Delestrac

Excerpts;

Japan is facing international condemnation after confirming it will resuming commercial whaling for the first time in more than 30 years.

The country’s fleet will resume commercial operations in July next 2019, the government’s chief spokesman, Yoshihide Suga, said of the decision to defy the 1986 global ban on commercial whaling…

Read Full Article; Guardian UK (12-25-2018)

Science Is No Excuse For Japan’s Antarctic Whaling, Court Rules, Nature (04-01-2014)
Japan’s hugely controversial ‘scientific whaling’ programme is not actually scientific and must be stopped, the International Court of Justice ruled…

Japan Kills 200 Pregnant Minke Whales; National Geographic (04-05-2018)

Like human societies, whales value culture and family ties; PhysOrg (04-05-2018)

Larger marine animals at higher risk of extinction, and humans are to blame, Science Daily (09-14-2016)
In today’s oceans, larger-bodied marine animals are more likely to become extinct than smaller creatures, according to a Stanford-led report. It’s a pattern that is unprecedented in the history of life on Earth, and one that is likely driven by human fishing…

Fifty years of decline in Queensland’s coastal sharks

black-tip-shark
Photograph: © SAF — Coastal Care

Excerpts;

Queensland’s coastal shark numbers are continuing a 50-year decline, in sharp contradiction of suggestions of ‘exploding’ shark populations, according to a new analysis.

Researchers analyzed data from the program, which has used baited drumlines and nets since 1962 to minimize human-shark interactions, and now spans 1,760 km of the Queensland coastline…

Read Full Article; Science Daily (12-13-2018)

What seabirds can tell us about the tide


Photograph: © SAF – Coastal Care

Excerpts;

A study, aimed to track tagged seabirds’ behaviour and movements along the coast, revealed that, at night, these seabirds spent a lot of their time idle on the sea surface.

Using seabirds to tell us about the tide could be especially useful for the marine renewable energy industry. Generating tidal energy requires detailed knowledge of current speeds. Scientists and engineers traditionally measure tides by using radar or deploying anchors and buoys with scientific instruments. However, these scouting methods are challenging and expensive. If tagged seabirds could provide tidal data over a large area, they could help identify sites that would be good sources of tidal energy…

Read Full Article; Science Daily (11-29-2018)