Achilles Tang
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Posts posted by Achilles Tang
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Early action could be crucial to addressing the problem of major increases in jellyfish numbers, which appears to be the result of human activities. New research presents convincing evidence that this "jellyfish joyride" is associated with over-fishing and excess nutrients from fertilizers and sewage.
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A comprehensive investigation into the axial complex of sea urchins has shown that within that group of marine invertebrates there exists a structural evolutionary interdependence of various internal organs. The research demonstrates that the approach of combining all structural data available on a given organ in combination with a broad taxonomic coverage can yield novel insights into the evolution of internal organ systems.
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Sharktooth Hill near Bakersfield, Calif., is the home of the most extensive marine bone bed in the world, a 100-square-mile layer of shark, seal, ray, whale, turtle and fish bones. Researchers have analyzed the 15-million-year-old fossils to decipher the history of what used to be the California coastline, reconstructing a 700,000-year period of warming climate and teaming sea life.
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Scientists have launched an unmanned aircraft to mount the vehicle's first search for ice seals at the southern edge of the Bering Sea pack ice during the Arctic spring, in an effort to learn more about these remotely located species.
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The skeleton of a whale that died around 10,000 years ago has been found in connection with the extension of the E6 motorway in Strömstad. The whale bones are now being examined by researchers who, among other things, want to ascertain whether the find is the mystical "Swedenborg whale".
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New research shows that when two species of stickleback fish evolved and lost their pelvises and body armor, the changes were caused by different genes in each species. That surprised researchers, who expected the same genes would control the same changes in both related fish. The findings shed new light on how evolution produces diversity in nature, and on the evolution of limb loss.
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Weak enforcement combined with fishermen facing serious economic hardships are leading to widespread violations of fisheries regulations along the Northeastern United States coast. This pattern of noncompliance threatens the success of new fisheries management measures put in place to protect and restore fish stocks, according to a new study.
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Using the zebrafish as an animal model, researchers have discovered that the body uses hydrogen peroxide to sound the alarm when a tissue has been injured. As a direct result of this hydrogen-peroxide red alert, white blood cells come to the aid of the wounded site.
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Exposure to estrogen reduces production of immune-related proteins in fish. This suggests that certain compounds, known as endocrine disruptors, may make fish more susceptible to disease. The research may provide new clues for why intersex fish, fish kills and fish lesions often occur together in the Shenandoah and Potomac rivers.
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What's the secret to surviving during times of environmental change? Evolve... quickly. A new article finds that guppy populations introduced into new habitats developed new and advantageous traits in just a few years. This is one of only a few studies to look at adaptation and survival in a wild population.
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Penguin poo (guano) stains, visible from space, have helped British scientists locate emperor penguin breeding colonies in Antarctica. Knowing their location provides a baseline for monitoring their response to environmental change.
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The sea floor is strewn with raw materials that could be very important in the future: Manganese and iron, but also rarer and more precious elements such as cobalt, copper, zinc and nickel, are present in great quantities in the form of deep-sea nodules and crusts.
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Elevated water temperatures and heightened concentrations of carbon dioxide can dramatically increase the growth rate of a keystone species of sea star, according to new research.
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There's little doubt that coral reefs the world over face threats on many fronts: pollution, diseases, destructive fishing practices and warming oceans. But reefs appear to be more resistant to one potential menace -- seaweed -- than previously thought, according to marine scientists.
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Ocean acidification, a direct result of increased carbon dioxide emission, is set to change the Earth's marine ecosystems forever and may have a direct impact on our economy, resulting in substantial revenue declines and job losses.
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For the very first time in New York coastal waters, the voices of singing blue whales have been positively identified. Acoustic experts confirmed that the voice of a singing blue whale was tracked about 70 miles off of Long Island and New York City on Jan. 10-11, 2009, as the whale swam slowly from east to west. At the same time, a second blue whale was heard singing offshore in the far distance.
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Marine turtles are vanishing from Viet Nam's waters and illegal trade is largely to blame says a new study.
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An explosion of knowledge has been made in the last few years about the basic biology of corals, researchers say in a new report, helping to explain why coral reefs around the world are collapsing and what it will take for them to survive a gauntlet of climate change and ocean acidification.
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Researchers have succeeded for the first time in measuring the physiology of marine phytoplankton through satellite measurements of its fluorescence -- an accomplishment that had been elusive for years. With this new tool, scientists will now be able to gain a reasonably accurate picture of the ocean's health and productivity about every week, all over the planet.
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A previously unknown giant volcanic eruption that led to global mass extinction 260 million years ago has been uncovered.
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Three University of Notre Dame researchers are among the authors of a new paper that describes a ground-breaking tool designed to help policy makers determine when and how to use an environmental strategy known as "managed relocation." (2009-05-27)
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The Atlantic cod has, for many centuries, sustained major fisheries on both sides of the Atlantic. However, the North American fisheries have now largely collapsed. A new article provides insights into possible mechanisms of the collapse of fisheries, due to fisheries-induced evolution.
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Researchers have confirmed the existence of a major new coral reef province on the southern end of the Porcupine Bank off the west coast of Ireland. The province covers an area of some 200 square kilometers and contains in the order of 40 coral reef covered carbonate mounds. These underwater hills rise as high as 100 meters above the seafloor.
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Scientists are, for the first time, objectively evaluating ways to help species adapt to rapid climate change and other environmental threats via strategies that were considered too radical for serious consideration as recently as five or 10 years ago. (2009-05-26)
Endangered Right Whales Identified Where They Were Presumed Locally Ex
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Using a system of underwater hydrophones that can record sounds from hundreds of miles away, scientists have documented the presence of endangered North Atlantic right whales in an area they were thought to be locally extinct.
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