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Ocean conservation: A big fight over little fish by Brendan Borrell is a Physics and Astronomy article available to read on EtoBox.

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W e ig h t 5 .1 k g W e ig h t 4 .6 k g W e ig h t 3 .2 k g Maturation 9 years SHRINKING FISH For Northeast Arctic cod, the age, size and weight of rst-time spawners have fallen dramatically. Length 85 cm Length 82 cm Length 73 cm 93 0 s 97 0 s 20 0 0 s O ne April day, a fisherman named Johan Norman reeled in a female cod near the Norwegian village of Moskenes, where snow-capped mountains rise straight from the sea. He measured the fish: 82 centimetres from the tip of its snout to the tip of its tail. Then he pulled out his knife and sliced off several scales, placing them in a small envelope to deposit at the Institute of Marine Research in Bergen, Norway. The year was 1913. Over the next century, as those scales sat in a repository, radical changes took place in the world's oceans. The small sailing vessels of Norway and other fishing nations were replaced with industrial bottom trawlers. In 1968, the North Atlantic cod harvest started a precipitous decline, as did other stocks, including salmon, sole and lobster. Then, in the early 1980s, biologists began to report another worrying phenomenon. Fish in some areas were growing more slowly, maturing earlier and laying fewer eggs th

Who reads Ocean conservation: A big fight over little fish?

Author

Brendan Borrell

Publisher

Nature Publishing Group; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc.; Publons; ScienceOpen; Island Press (ISSN 0028-0836)

Published

2013

Language

EN

Field

Physics and Astronomy (Physical Sciences)