Half Of Fish Consumed Globally Is Now Raised On Farms, Study Finds

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These are moi, or Pacific threadfin, being sorted for market after harvest from an offshore aquaculture cage in Hawaii.

Aquaculture, once a fledgling industry, now accounts for 50 percent of the fish consumed globally, according to a new report by an international team of researchers. And while the industry is more efficient than ever, it is also putting a significant strain on marine resources by consuming large amounts of feed made from wild fish harvested from the sea, the authors conclude. Their findings are published in the Sept. 7 online edition of the Proceedings of the National Academy of Sciences (PNAS) Continue reading… “Half Of Fish Consumed Globally Is Now Raised On Farms, Study Finds”

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Dolphins Get A Lift From Delta Wing Technology

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Two Hawaiian Spinner Dolphins swimming off the coast of Oahu.

We can only marvel at the way that dolphins, whales and porpoises scythe through water. Their finlike flippers seem perfectly adapted for maximum aquatic agility. However, no one had ever analysed how the animals’ flippers interact with water; the hydrodynamic lift that they generate, the drag that they experience or their hydrodynamic efficiency. Laurens Howle and Paul Weber from Duke University teamed up with Mark Murray from the United States Naval Academy and Frank Fish from West Chester University, to find out more about the hydrodynamics of whale and dolphin

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Evolution Of A Contraceptive For Invasive Sea Lamprey

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Lamprey mouth

In addition to providing fundamental insights into the early evolution of the estrogen receptor, research by a team at the University of California, San Diego School of Medicine may lead to a contraceptive for female lampreys – a jawless fish considered an invasive pest species in the Great Lakes region of the United States. This could prove important to the Great Lakes region, where lampreys aggressively consume trout, salmon, sturgeon and other game fish.

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Blue Whale Discovered Singing In New York Coastal Waters

For the very first time in New York coastal waters, the voices of singing blue whales have been positively identified. Acoustic experts at the Cornell Lab of Ornithology’s Bioacoustics Research Program (BRP) and the New York State Department of Environmental Conservation (DEC) 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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Disappearing Act Of World’s Second Largest Fish …

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And you think your “Inlaws” have a big mouth

Researchers have discovered where basking sharks – the world’s second largest fish – hide out for half of every year, according to a report published online on May 7th in Current Biology. The discovery revises scientists’ understanding of the iconic species and highlights just how little we still know about even the largest of marine animals, the researchers said.

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