The first detection of marine fish DNA in sediment sequences going back 300 years

The first detection of marine fish DNA in sediment sequences going back 300 years
The left panel is a photo denoting a sediment core used for the analysis of DNA concentrations in layers. The right panel denotes the reconstructed temporal changes in DNA concentration. Sedimentary DNA tracks decadal-centennial scale changes in fish abundance. Credit: Michinobu Kuwae, CMES, Ehime University

Long-term variability in the abundance of a macro-organism could provide fundamental information for evaluating its evolution, its responses to climate changes and human impact, enabling management and preservation strategies. Biological monitoring in aquatic systems has provided evidence of long-term variability in the abundance of macro-organisms. However, almost all such records span less than a century; there are none which span centuries or more. Aquatic bottom sediments have provided records of species abundance on longer time scales, although previous studies addressed marine fish species using fossil remains (mainly fish scales) and reconstructed abundance for only seven fish taxons. Thus, there remains a distinct lack of information

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Underage Marine became one of World War II’s daring ‘Thieves’ of Saipan; he landed in Oregon after military career

The Marines wore sneakers.

They moved noiselessly through the jungle in their unconventional military footwear. They carried knives and rifles and dynamite, but they planned to use piano wire — the “Mafia necktie” — to kill.

The Marine Corps magazine The Leatherneck would call them “Tachovsky’s Terrors” in a December 1944 issue (their leader was Lt. Frank Tachovsky). But their fellow Marines in the 6th Regiment knew them as “The 40 Thieves” — a Marine platoon being about 40 men.

Herbert McBride, who settled in southern Oregon after hanging up his combat sneakers, was one of the Thieves. A Memphis native, he joined the Marines shortly after the Japanese attacked the United States at Pearl Harbor on Dec. 7, 1941. McBride offered up a fake birth certificate that put his age at 19. He’d actually just turned 15.

Frank Tachovsky

Frank Tachovsky, who led the “40 Thieves,” receives a Silver Star from

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International Marine Shipping Industry Considers Nuclear Propulsion

It didn’t take a Biden-Harris win to make the world’s shipping industry act to decrease their carbon footprint – they were already planning to do that.

The International Maritime Organization has adopted mandatory measures to reduce emissions of greenhouse gases from international shipping, under their pollution prevention treaty (MARPOL) using their Energy Efficiency Design Index (EEDI) mandatory for new ships, and their Ship Energy Efficiency Management Plan (SEEMP).

The IMO is targeting a reduction in the carbon intensity of international shipping by at least 40% by 2030 compared with 2008 levels, and by 70% by 2050. The IMO took this action in support of the United Nations Sustainable Development Goal 13, to take urgent action to combat climate change and its impacts.

The International Shipping

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New Prehistoric Marine Reptile Resembled a Miniature Mix of Loch Ness Monster, Alligator and Toothy T. Rex | Smart News

About 240 million years ago, massive oceanic reptiles called nothosaurs dominated the seas. They looked like the mutant offspring of a trihybrid cross between the Loch Ness monster, an alligator and a T. rex. The beasts had long tails to slither underwater, jaws packed with razor-sharp teeth and flipper-like limbs to propel themselves through the water.

When a team of paleontologists from the Chinese Academy of Scientists and Canadian Museum of Nature discovered two small, similar fossils in quarries in southwest China, the scientists originally thought they belonged to juvenile nothosaurs. Further analysis revealed that they actually discovered a new species—the nothosaur’s smaller, stockier cousin. The team’s findings were published last week in the Journal of Vertebrate Paleontology, reports Science News’ Aayushi Pratap.

The team named the newly unearthed reptile Brevicaudosaurus jiyangshanensis, which roughly means “short-tailed lizard of Jiyangshan,” the quarry it was found in, according to

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Eco-engineered tiles enhance marine biodiversity on seawalls in Hong Kong and beyond

Eco-engineered tiles enhance marine biodiversity on seawalls in Hong Kong and beyond
Eco-engineered tiles attached to the vertical seawalls in Lok On Pai, Hong Kong. Credit: City University of Hong Kong

A joint-study led by a team of marine ecologists from City University of Hong Kong (CityU) has found that the eco-engineered tiles can increase habitat complexity on seawalls in Hong Kong, thereby effectively enhancing the marine biodiversity. The Hong Kong study is part of a global research project on the relationship between habitat complexity and marine biodiversity on human-built marine structures.

Professor Kenneth Leung Mei-yee, who has recently joined CityU and is the new Director of the State Key Laboratory of Marine Pollution (SKLMP) and Chair Professor of Environmental Toxicology & Chemistry, led a team made up of researchers from the University of Hong Kong (HKU) as well as universities in the United Kingdom, Australia and Singapore to conduct the experiment in Hong Kong. Their findings were published recently in the

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Ninety years of data shows global warming impacts on foundation of marine ecosystems

Ninety years of data shows global warming impacts on foundation of marine ecosystems
Based on one of the longest time series of phytoplankton in the Southern Hemisphere, Australian researchers have found a significant warming signature in the phytoplankton community overtime. Credit: P. Ajani

Understanding the impacts of global warming on phytoplankton- the foundation of marine ecosystems -is critical to predicting changes in future biodiversity, ocean productivity, and ultimately fisheries production.

Based on one of the longest time series of phytoplankton in the Southern Hemisphere, Australian researchers have found a significant warming signature in the phytoplankton community overtime.

The data set was collected over almost 90 years from 1931-2019 from a Pacific Ocean coastal station offshore from Sydney.

The University of Technology Sydney (UTS) led research, published in Frontiers in Marine Science, provides insights into the potential traits that may determine the adaptive capacity or survivability of species under climate change.

Lead author, Dr. Penelope Ajani, said environmental data showed ocean temperature had

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Elite marine scientist named fellow in her field | East Jefferson community news

Slidell resident Laurie Jugan’s passion and effort as a marine scientist have earned her an award that highlights her as an elite member of her field.

The Marine Technology Society named her as a 2020 fellow, a lifetime achievement award given to members who have distinguished themselves in the field.

Jugan is president of the Gulf Coast section of the organization, an area that spans from Louisiana through the panhandle of Florida. She is the first woman from the section to receive the award.

Jugan has spent nearly 30 years connecting the latest technology advancements with the marine science industry to solve problems in waters around the globe but especially in the Gulf Coast.

She spent 25 years as an oceanographer, working for a small company that developed technology for underwater projects. In her position, she wrote proposals, managed contracts and supervised teams at Stennis Space Center and across the

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‘Intelligent’ Chinese marine ranch combines hi-tech fish farming, tourism

Oct. 29 (UPI) — Chinese industry and tourism officials are touting a recently opened “intelligent ecological marine ranch” as a potential game-changer for the country’s depleted fishing waters.

Genghai No.1, a marine farm owned by the Shandong Ocean Harvest Corp., opened in July off the coast of Yantai in northeastern Shandong Province as a model of how modern, high-tech fishing techniques can be combined with tourism to revitalize and preserve the industry.

Marine ecosystems in most coastal areas of Shandong have been disrupted over the past 50 years by overfishing and the deterioration of coastal environments, endangering the fish resources.

But local and national leaders are now leading a push to transform the area’s fishing economy with marine ranches. With nearly 1,000 square miles of ocean areas suitable for the construction of high-quality ocean ranches, Yantai has emerged as hotbed in the emerging technology, Chinese officials say.

Marine ranching, first

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Ancient marine predator had a built-in float

Ancient marine predator had a built-in float
An illustration of Brevicaudosaurus. Credit: Tyler Stone BA ’19, art and cinema; see his website

About 240 million years ago, when reptiles ruled the ocean, a small lizard-like predator floated near the bottom of the edges in shallow water, picking off prey with fang-like teeth. A short and flat tail, used for balance, helps identify it as a new species, according to research published in the Journal of Vertebrate Paleontology.

Paleontologists at the Chinese Academy of Scientists and Canadian Museum of Nature have analysed two skeletons from a thin layer of limestone in two quarries in southwest China. They identified the skeletons as nothosaurs, Triassic marine reptiles with a small head, fangs, flipper-like limbs, a long neck, and normally an even longer tail, probably used for propulsion. However, in the new species, the tail is short and flat.

“Our analysis of two well-preserved skeletons reveals a reptile with

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Researchers outline how marine reserves can benefit fisheries across the globe

marine reserve
Credit: CC0 Public Domain

Society will require more food in the coming years to feed a growing population, and seafood will likely make up a significant portion of it. At the same time, we need to conserve natural habitats to ensure the health of our oceans. It seems like a conflict is inevitable.

“Marine protected areas are tools commonly used to conserve marine biodiversity by closing parts of the ocean to fishing,” said Reniel Cabral, an assistant researcher at UC Santa Barbara’s Environmental Market Solutions Lab. “This creates a potential dilemma when closures cause fishers to lose access to fishing grounds.”

A new study indicates that this need not be the case. The paper outlines where the benefits of fishing restrictions could enable a fishery to become more productive, even with the closures. The research, published in the Proceedings of the National Academy of Sciences, lays the groundwork for

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