Tag Archives: unsustainable fisheries

Vaquita and Totoaba–endangered fish as delicacy

fish bladder factory californa

The most recent estimate puts the remaining numbers of vaquita, a porpoise found only in the waters of the Sea of Cortés, Mexico, at just 60, down from 100 two years ago…. The vaquita has been a victim of the shrimp and totoaba fisheries, showing up as bycatch in gillnets.

The totoaba is also an endangered species but its swim bladder is a delicacy in China, selling for as much as US $5,000 per kilogram in the U.S. and a great deal more in China. The matter has been taken up by Agriculture Secretary José Calzada Rovirosa with Chinese officials in an effort to stop the illegal consumption of the bladders.  Vaquitas are not only being killed by totoaba fishing. When illegal fishermen are pursued by the Mexican Navy, they often cut their nets and set them adrift, becoming an additional threat to the porpoise.

Removing these “ghost nets” will be one of the steps taken before the implementation of an assisted breeding program, said marine mammal expert Lorenzo Rojas Bracho from the National Institute of Ecology and Climate Change.

There are doubts about the feasibility of a breeding program as well as concerns about the risk. “We have no idea whether it is feasible to find, capture and maintain vaquitas in captivity much less whether they will reproduce,” said vaquita expert Barbara Taylor of the U.S. National Oceanic and Atmospheric Administration.

Excerpt from Assisted breeding for endangered vaquita?, Mexco News Daily, June 28, 2016

Damaged Fish For Sale

fishing

The global fish-price index of the UN’s Food and Agricultural Organisation (FAO) hit a record high in May 2013.  High oil prices, which increase the cost of fishing and transportation, also add to the price of putting fish on the table.  Not all fish are created equal, however. There are two types of fish production: “capture” (or wild) and “aquaculture” (or farmed). And they seem to be on different trajectories. Fish such as tuna, the majority of which is caught wild, saw much bigger price increases than salmon, which are easier to farm. Overall, the FAO’s price index for wild fish nearly doubled between 1990 and 2012, whereas the one for farmed fish rose by only a fifth. What explains this big difference?

The amount of wild fish captured globally has barely changed in the past two decades. The ceiling, of about 90m tonnes a year, seems to have been reached at the end of the 1980s. Overfishing is one reason, as is the limited room for productivity growth, particularly if consumers want high quality.

Patrice Guillotreau of the University of Nantes tells the story of a fleet in France that decided to trawl, rather than line-catch, its tuna. It brought more back to shore, but the fish were damaged. It could not be sold as high-value fillets and was only good for canning. The old ways of catching fish are still best if you want the highest profits, says Mr Guillotreau.

In contrast, the farmed-fish industry continues to make productivity improvements. Fish farms have found crafty ways to use lower quantities of fishmeal as feed. In the early days of aquaculture, it could take up to ten pounds of wild fish to produce one pound of salmon. Now the number is down to five. That may still be an inefficient use of protein, but the ratio is set to improve further. Fish farms have also become more energy-efficient, meaning that they are less affected by higher energy prices. And they have learned how to handle diseases better, reducing the quantity of fish that ends up being unsellable.  As a result of all these improvements, the global production of farmed fish, measured in tonnes, now exceeds the production of beef. Output is likely to continue growing: the FAO estimates that by 2020 it will reach six times its 1990 level.

This growth will further shake up the markets for fish. The farmed kind is expected to dominate the market for medium-value produce. Suppliers of wild fish, for their part, must slither into niche markets. At the low-value end wild sardine is a crucial input for farmed fish and is in abundant supply. More than a third of the total marine catch in 2010 was used for the production of fishmeal and fish oil.  But more money may be made serving the captains of industry rather than industry itself. Sapmer, a French fishing company, recently discontinued its canned-tuna production, instead concentrating on catching tuna for sushi and sashimi for the top end of the market.

Frank Asche of the University of Stavanger, who helped to devise the FAO fish-price index, sees parallels with the divergence between farmed meat and wild game. As the supply of wild fish declines relative to farmed fish, it will become a luxury commodity, he explains. “In 20 years’ time people will think of wild fish like we now think of venison.”

The price of fish: Different scales, Economist, Aug. 10, 2013, at 64