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Pheromones may help foil reef-killing starfish

Pheromones may help foil reef-killing starfish
Image copyright University of Queensland Image caption The species has been described as a significant threat to coral A starfish considered a key threat to international coral reefs could be thwarted by harnessing its own pheromones, scientists say. The crown-of-thorns starfish has ravaged Australia's Great Barrier Reef by smothering and eating coral tissue. Researchers believe the pest could be lured for removal by fabricating the chemicals it uses to attract a mate. The study unmasks how the species congregates in huge swarms, the Australian and Japanese team said. The research, published in the journal Nature , studied the genomes of starfish gathered from the two nations. It decoded the pheromones responsible for drawing starfish together so they could reproduce, said lead researcher Prof Bernard Degnan. Image copyright University of Queensland Image caption Husband-and-wife researchers Associate Prof Sandie Degnan and Prof Bernard Degnan "We were able to use that approach to...
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We are heading for the warmest climate in half a billion years, says new study

We are heading for the warmest climate in half a billion years, says new study
Carbon dioxide concentrations are heading towards values not seen in the past 200m years. The sun has also been gradually getting stronger over time. Put together, these facts mean the climate may be heading towards warmth not seen in the past half a billion years. A lot has happened on Earth since 500,000,000BC – continents, oceans and mountain ranges have come and gone, and complex life has evolved and moved from the oceans onto the land and into the air. Most of these changes occur on very long timescales of millions of years or more. However, over the past 150 years global temperatures have increased by about 1℃, ice caps and glaciers have retreated, polar sea-ice has melted, and sea levels have risen. Some will point out that Earth’s climate has undergone similar changes before . So what’s the big deal? Scientists can seek to understand past climates by looking...
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Close connection between deep currents and climate

Close connection between deep currents and climate
Water samples are being obtained in the Labrador Sea. Credit: Rafael Abel, GEOMAR Mild winters in northern Europe, rainfall in western Africa, hurricanes in North America -the energy transported around the world by the global ocean circulation affects the climate as well as regional weather phenomena. One of the key regions for the ocean circulation is the Labrador Sea between North America and Greenland. There warm, saline waters coming from the south near the sea surface cool down and sink to the depth. There the water masses flow back to the south along the continental margin. Thereby the area is one of the regions of crucial importance for the global ocean circulation. At the southern exit of the Labrador Sea, the GEOMAR Helmholtz Center for Ocean Research Kiel has been operating oceanographic observatories since 1997 that cover all levels of this current system. A team of four oceanographers now published...
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Mediterranean fish stocks deteriorate 'at alarming rate'

Mediterranean fish stocks deteriorate 'at alarming rate'
Fish stocks in the Mediterranean are being depleted at an alarming rate, with the sea's biodiversity increasingly under threat by pollution, climate change and overfishing, a group of researchers that advises the European Union said on Monday. In a study published in the "Scientific Reports" of the journal "Nature," the Joint Research Center (JRC) said 93 percent of assessed fish stocks were overexploited. It added that any further delay in transnational action "could result in irreversible damage and a collapse of key stocks that are essential to the fisheries sector." In another worrying finding, the JRC said that the Mediterranean had lost 41 percent of its marine mammals and 34 percent of its total fish population over the past 50 years, with the biggest depletions being found in the Western Mediterranean Sea and the Adriatic Sea (-50 percent), and the smallest in the Ionian Sea (-8 percent). Highly vulnerable The...
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OCEANROAMERS - THEOCEANROAMER
As some of you might know, since more than 10 years I contribute my skills, knowledge and experience to several Non Profit projects aimed at bettering our Oceans and the professionals roaming them. Notably: 1. DIVE PROFESSIONALS - THEDIVEPROFESSIONAL: 2007 - Present This project is aimed at uniting professional divers worldwide. A network of 30,000 + professionals and growing daily. More information: www.dive-professionals.org 2. GOBLU3 - THE OC3AN CLUB - OASF: Aimed at recreating a lost bond with the Oceans for the wider consumer. Where education, exploration and conservation go hand in hand. www.oceanroamers.biz Most investments and supporting work are done by myself, including the financing and maintaining of the websites supporting these projects. But here's the springing point, I need your help in continuing my work. As we go off the drawing table and live with some projects. Requiring special tools and now also again major updates to our websites...requires $ So thanks for reading my message and contemplating supporting my work by donating to my PayPal​ account for the benefit of the Oceans and Professional Divers worldwide. Dive Safely, Your OCEANROAMERS - THEOCEANROAMER aka DIVE PROFESSIONALS https://lnkd.in/gvm6Tqb
OCEANROAMERS - THEOCEANROAMER
#Plastic is one of the most enduring materials we make; it takes an estimated 500 to 1,000 years for it to #degrade, but 50 percent of the plastic we produce is used once and then thrown away. Eight million tons of plastic ends up in the #ocean every year. #oceandebris #plasticpollution #sustainability #goblu3 Facts like this are plentiful, but you get the idea. So, a call to arms. Here are some very easy things to give up in order to curb your contribution to the problem.