http://gallery.pictopia.com/providerasset/1/pictopia_logo.pnghttp://gallery.pictopia.com/providerasset/1/pictopia_logo.pnghttp://gallery.pictopia.com/natgeo/gallery/13306/2011-11-28T23:02:54Z2011-11-28T23:02:54ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884576/

Thoroughbreds of the seas, wild-caught yellowfin tuna one of seven major tuna species are cage-fed squid and sardines in the Gulf of California to improve the quality of their meat. Terry Morris, who runs the operation, says he thought yellowfin would be relatively easy to find. Boy, was I wrong.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884576&size=128&m=1322550174.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884576&size=128&m=1322550174.01055387http://gallery.pictopia.com/natgeo/gallery/13306/photo/884576/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2010-11-03T12:20:48ZBrian Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884573/

A thresher shark is fatally caught in a fishing net.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884573&size=128&m=1288812048.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884573&size=128&m=1288812048.01055384http://gallery.pictopia.com/natgeo/gallery/13306/photo/884573/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2008-02-07T23:13:05ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884580/

To supply the world's sushi and sashimi markets, the magnificent giant bluefin tuna is fished in the Mediterranean at four times the sustainable rate. These bluefin are being fattened off Spain at one of 69 ranches that have sprung up in the Mediterranean in the past decade, demolishing stocks of the fish.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884580&size=128&m=1202454785.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884580&size=128&m=1202454785.01055393http://gallery.pictopia.com/natgeo/gallery/13306/photo/884580/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-04-09T15:25:18ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884579/

Novel aquaculture methods include deepwater cages supported by pillars operated by Snapperfarm, Inc., off Puerto Rico to grow cobia. With this open-ocean system, currents disperse excrement from the fish, but with farms in coastal shallows, waste builds up, polluting the waters. Aquaculture companies usually feed carnivorous fish smaller fish of other species, but Snapperfarm raises its cobia from fingerlings to 12-pound (5 kilograms) adults in a year on a diet of half grain, half fish meal and hopes eventually to eliminate fish from the feed. Aquaculture now contributes nearly 50 percent of the world's seafood, filling the void left by declining stocks in the wild.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884579&size=128&m=1176157518.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884579&size=128&m=1176157518.01055392http://gallery.pictopia.com/natgeo/gallery/13306/photo/884579/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-03-29T11:25:34ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884578/

Now banned in many countries, deep trawling with nets held open by heavy doors bulldozes the seabed and catches sea life indiscriminately, more than 50 percent of all discarded.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884578&size=128&m=1175192734.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884578&size=128&m=1175192734.01055391http://gallery.pictopia.com/natgeo/gallery/13306/photo/884578/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-03-29T11:25:32ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884575/

Hooked without a permit, a dorado sold as mahi-mahi was caught on an illegal longline off Mexico. With thousands of baited hooks, longlines extend for miles, often snaring fish unintentionally, notably sharks, as well as hundreds of thousands of sea turtles, marine mammals, and seabirds every year. In longline fishing, eventually discarded bycatch makes up nearly 30 percent of the take.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884575&size=128&m=1175192732.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884575&size=128&m=1175192732.01055386http://gallery.pictopia.com/natgeo/gallery/13306/photo/884575/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-03-29T11:25:32ZBrian J. Skerry/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884577/

In a cascade of death, guitarfish, rays, and other bycatch are tossed from a shrimp boat in the Gulf of California. During the past decade, efforts to reduce bycatch have begun to pay off with better net and hook designs, pingers on nets to repel marine mammals, and streamers behind boats to frighten away seabirds.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884577&size=128&m=1175192732.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884577&size=128&m=1175192732.01055388http://gallery.pictopia.com/natgeo/gallery/13306/photo/884577/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-03-29T11:25:31ZRandy Olson/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884571/

A reef off Indonesia laid bare to supply restaurants with live fish now attracts divers searching for lobsters, the last remaining valuable species. The global trade in live reef fish may top a billion dollars a year, with many species captured by cyanide or traps. Use of dynamite to kill reef fish increases the toll taken by the live trade. In 2004, the humphead wrasse was the first reef fish listed by the Convention on International Trade in Endangered Species.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884571&size=128&m=1175192731.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884571&size=128&m=1175192731.0Stripped Cleanhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884571/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis2007-03-29T11:25:31ZRandy Olson/National Geographic Image Collectionhttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884572/

Fish such as Atlantic bumpers are a crucial food source in Senegal and elsewhere in Africa, where 200 million people depend largely on seafood for their animal protein. Worldwide, fish sustain one billion people, many of them poor. As pressure on stocks increases, the challenge for developing countries whose share of fish production is projected to increase to 81 percent by 2015 is to balance the need for revenue with the need for food.

//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884572&size=128&m=1175192731.0//pictopia.com/perl/get_image?provider_id=318&ptp_photo_id=natgeo:884572&size=128&m=1175192731.0Food for the Masseshttp://gallery.pictopia.com/natgeo/gallery/13306/photo/884572/In the Magazine/Past Issues/April 2007/April 2007 Global Fisheries Crisis