Where are the fish? Ocean fisheries in trouble

Where are the fish? Ocean fisheries in trouble.

Where are the fish? Ocean fisheries in trouble

Meeting in Canada to discuss fate of global marine fisheries

mongabay.com

May 3, 2005

Talks began in Canada this week aimed at addressing the deteriorating condition of the world’s marine fisheries, but in an atmosphere with little reason for optimism. Past efforts to manage fisheries or control overfishing have largely failed to slow the depletion of marine resources.

Scientists, politicians, and fisherman alike know there’s a problem. Smaller fish and smaller catches suggest that the world’s oceans are no longer producing at their full potential. The bounty of the sea is becoming less generous — scientists estimate that the number of large fish in the oceans has fallen by as much as 90% since the 1950s. Improvements in technology have made it easier for fisherman to find and harvest more fish than ever before while demand for sea life products — which are consumed by both the rich and poor — is at an all time high.

Table courtesy of the Marine Resources Service, Fishery Resources Division, FAO Fisheries Department.

While global marine catches have yet to fall far from peak levels, a recent report (Review of the state of world marine fishery resources) from the The United Nations Food and Agriculture Organization’s Fisheries Department says 77 percent of the world’s fish stocks are “fully exploited” — producing catches that are already at or very close to their maximum sustainable production limit, over-exploited, depleted, or recovering. The proportion of stocks FAO classifies as “under-exploited” has fallen to 3 percent, while the amount of “modertately exploited” stocks stands at 20 percent.

Chart showing decline of Atlantic cod catch off the coast of Newfoundland
Graph based on data from the Marine Resources Service, Fishery Resources Division, FAO Fisheries Department.

Several of the world’s important fisheries — including the cod and haddock fishery of the Grand Banks off Newfoundland in the north Atlantic — have collapsed and increasingly, fisherman are turning to smaller, less attractive, and less accessible species to make up for the shortfall of premium species. Trawlers are now fishing waters more than a mile deep to catch species such as the Orange roughy that few would have considered edible or useful a decade ago. These species are also at risk of overexploitation. In the case of the orange roughy, the southeast fishery of Australia saw its orange roughy catches fall from over 50,000 tonnes in 1990 to 5,579 tonnes in 1997.

Worse, the amount of waste in commercial fishing is staggering. More than 80 percent of catch in some fisheries may be by-catch, or species other than the species for which the fishing gear was set. Bycatch, also called incidental catch, is typically discarded at sea and may include fish, corals, sea turtles, and dolphins.

Tables courtesy of the Marine Resources Service, Fishery Resources Division, FAO Fisheries Department.

Fishermen race for fish

The fundamental problem with facing the management of the world’s fisheries is the “tragedy of the commons.” Since in many areas, ocean fish are essentially an open access resource there is no incentive for an individual fisherman to restrain his catch. If an individual fisherman conserves for tomorrow, he is only providing someone else with the resource today.

Looking for a solution

Assigning property rights may help the situation and in some areas such schemes have showed signs of success. On the open ocean however, it is considerably more difficult to enforce boundaries and set binding fishing limits. Plus, there is no guarantee that local fisheries will not be overexploited by commercial interests. As some wealth countries have depleted their own fisheries, they have moved into poor countries, buying fishing rights — often from corrupt bureaucrats — and then continuing their unsustaiable plunder of marine resources.

Some have argued that a global network of marine parks could help protect and restore some of the world’s most impacted fisheries, while aquaculture — which has expereinced tremendous growth in recent years — could supplement protein needs. But in order for any sort of conservation plan to be successful, all the involved parties must be brought to the table to hammer out a mutually agreeable plan. If past summits are any indication, this could take a very long time.

Current state of exploitation of selected species and groups
fished in the Northwest Atlantic (Adapted from FAO Fisheries Department data 2004).

Stock or species groups	Scientific name	Main fishing countries in 2002	State of exploitation*
Amer. plaice(=Long rough dab)	Hippoglossoides platessoides	Canada, USA, Spain, Portugal	F
Flatfishes nei	Pleuronectiformes	Canada, Portugal	F
Greenland halibut	Reinhardtius hippoglossoides	Greenland, Spain, Canada, Russian Fed	F
Summer flounder	Paralichthys dentatus	USA	F
Winter flounder	Pseudopleuronectes americanus	USA, Canada	F
Witch flounder	Glyptocephalus cynoglossus	USA, Canada, Spain, Portugal	F
Yellowtail flounder	Limanda ferruginea	Canada, USA	F
Other Flounders, halibuts, soles			F
Flounders, halibuts, soles
Atlantic cod	Gadus morhua	Canada, USA, Greenland	D
Haddock	Melanogrammus aeglefinus	Canada, USA	D
Saithe(=Pollock)	Pollachius virens	Canada, USA	F
Silver hake	Merluccius bilinearis	Canada, USA, Russian Fed	U
Tusk(=Cusk)	Brosme brosme	Canada, USA	F
White hake	Urophycis tenuis	Canada, USA, Spain, Portugal	F
Other Cods, hakes, haddocks, etc.			F
Cods, hakes, haddocks, etc.
Miscellaneous costal fishes			?
American angler	Lophius americanus	USA, Canada	F
Atlantic redfishes nei	Sebastes spp	Russian Fed, Canada, Lithuania, Portugal	F
Other Miscellaneous demersal fishes			?
Miscellaneous demersal fishes
Atlantic herring	Clupea harengus	Canada, USA	U-F-R
Atlantic menhaden	Brevoortia tyrannus	USA	F
Other Herrings, sardines, anchovies			?
Herrings, sardines, anchovies
Atlantic mackerel	Scomber scombrus	Canada, USA	F
Capelin	Mallotus villosus	Canada	F
Other Miscellaneous pelagic fishes			U
Miscellaneous pelagic fishes
American lobster	Homarus americanus	Canada, USA	F/O
Lobsters, spinyrock lobsters
Pandalus shrimps nei	Pandalus spp	Canada	F
Other Shrimps, prawns, etc.			?
Shrimps, prawns, etc.
American sea scallop	Placopecten magellanicus	USA, Canada	M-F
Atlantic bay scallop	Argopecten irradians	USA	?
Iceland scallop	Chlamys islandica	Greenland, Canada
Scallops, penctens, etc.
Atlantic surf clam	Spisula solidissima	USA	M-F
Northern quahog(=Hard clam)	Mercenaria mercenaria	USA, Canada	M-F
Ocean quahog	Arctica islandica	USA	M-F
Sand gaper	Mya arenaria	USA, Canada	?
Other Clams, cockles, arkshells, etc.			?
Clams, cockles, arkshells, etc.