Executive Summary
The Porbeagle Shark (Lamna nasus) is a remarkable fast, large shark that has adapted to cold waters in the northern and southern hemisphere through heat exchangers that keep its body warmer than surrounding waters. Its extensive range includes the North Atlantic, South Atlantic, South Pacific, South...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.366.4664 2023-05-15T13:56:12+02:00 Executive Summary Wildlife Service The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.4664 http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.4664 http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf text 2010 ftciteseerx 2016-01-08T01:04:16Z The Porbeagle Shark (Lamna nasus) is a remarkable fast, large shark that has adapted to cold waters in the northern and southern hemisphere through heat exchangers that keep its body warmer than surrounding waters. Its extensive range includes the North Atlantic, South Atlantic, South Pacific, South Indian, and Antarctic Oceans. Like other sharks, it is part of an ancient lineage stretching back more than 200 million years. Its evolutionary fine-tuning hasn’t protected it, however, from a literal feeding frenzy – by humans on sharks. The Porbeagle has suffered staggering declines as a result of fishing. In the Northeast Atlantic, European fishing fleets decimated this shark’s populations within a few decades, starting in the 1930s. But what happened in the Northwest Atlantic was the eyeopener. Norwegian fishing vessels then turned their sights to the west in 1961. Within just six years the Porbeagle Shark stock in the Northwest Atlantic was destroyed. After the stock started to rebound a few decades later, the Canadians thought they would try their luck, focusing on Porbeagle starting in the 1990s. The same thing happened, but worse this time: the population plummeted to record lows. Scientists estimate it may take Text Antarc* Antarctic Lamna nasus North Atlantic Northeast Atlantic Northwest Atlantic Porbeagle Unknown Antarctic Indian Pacific |
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The Porbeagle Shark (Lamna nasus) is a remarkable fast, large shark that has adapted to cold waters in the northern and southern hemisphere through heat exchangers that keep its body warmer than surrounding waters. Its extensive range includes the North Atlantic, South Atlantic, South Pacific, South Indian, and Antarctic Oceans. Like other sharks, it is part of an ancient lineage stretching back more than 200 million years. Its evolutionary fine-tuning hasn’t protected it, however, from a literal feeding frenzy – by humans on sharks. The Porbeagle has suffered staggering declines as a result of fishing. In the Northeast Atlantic, European fishing fleets decimated this shark’s populations within a few decades, starting in the 1930s. But what happened in the Northwest Atlantic was the eyeopener. Norwegian fishing vessels then turned their sights to the west in 1961. Within just six years the Porbeagle Shark stock in the Northwest Atlantic was destroyed. After the stock started to rebound a few decades later, the Canadians thought they would try their luck, focusing on Porbeagle starting in the 1990s. The same thing happened, but worse this time: the population plummeted to record lows. Scientists estimate it may take |
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The Pennsylvania State University CiteSeerX Archives |
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Wildlife Service |
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Wildlife Service Executive Summary |
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Wildlife Service |
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Wildlife Service |
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Executive Summary |
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Executive Summary |
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Executive Summary |
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Executive Summary |
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Executive Summary |
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executive summary |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.4664 http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf |
geographic |
Antarctic Indian Pacific |
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Antarctic Indian Pacific |
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Antarc* Antarctic Lamna nasus North Atlantic Northeast Atlantic Northwest Atlantic Porbeagle |
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Antarc* Antarctic Lamna nasus North Atlantic Northeast Atlantic Northwest Atlantic Porbeagle |
op_source |
http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.366.4664 http://www.nmfs.noaa.gov/pr/species/petitions/porbeagle_shark_petition2010.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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