Protecting a fish

Changing the status of the Pacific bluefin tuna to endangered largely symbolic, some say

The Pacific bluefin tuna is often caught early in its lifecycle, limiting the species’ ability to reproduce.

The Pacific bluefin tuna is often caught early in its lifecycle, limiting the species’ ability to reproduce.

Photo courtesy of NOAA

About this story:
Longtime CN&R contributor Alastair Bland originally wrote this piece for NPR.

Environmentalists are demanding that one of the most prized fishes on the planet be listed as an endangered species.

Last week, about a dozen environmental groups—including Greenpeace, the Center for Biological Diversity, Defenders of Wildlife and Earthjustice—formally petitioned the U.S. National Marine Fisheries Service to consider listing the Pacific bluefin tuna as endangered under the Endangered Species Act. That status mandates the highest levels of protection from harm.

Other endangered species include the California condor and the Florida panther. Some scientists and activists feel the chances of getting the fish listed are slim. However, many also feel the action is long overdue.

The Pacific bluefin tuna, a species distinct from the overfished Atlantic bluefin, has been depleted to less than 3 percent of its estimated unfished levels, according to numerous researchers.

This, scientists and environmentalists argue, is an ecological emergency.

“The stock is down over 97 percent from prefishing levels, so there is no doubt the species needs to have some protections put in place,” Duke University research scientist Andre Boustany said via email.

One of the problems with current fishing patterns, said Catherine Kilduff, a staff attorney with the Center for Biological Diversity, is that most—possibly more than 98 percent—of the Pacific bluefin that are caught and processed are immature juveniles that have never reproduced.

“So the baby fish never grow up to be moms and dads, and the adult fish eventually die,” Kilduff said. “We feel this is a recipe for extinction.”

The international fishery essentially manages itself, setting its own quotas each year, and critics say too many tuna are taken. Boustany, for one, said the fishery managers’ population recovery goals are much too modest: By 2024, he said, “the current management measures are only aiming to rebuild the stock” to around 6 percent of what it would be if the Pacific bluefin wasn’t fished.

And “almost all of the conservation measures that have been put in place to meet this low target are voluntary,” Boustany wrote. “There is a reasonable probability that this target will not be met.”

The process of considering the petition and eventually listing the Pacific bluefin could take about two years, said Kilduff.

She said an endangered status would make it illegal to catch and kill Pacific bluefin in American waters, which extend 200 nautical miles from shore. Kilduff said it would also forbid Americans from possessing the fish even when outside of the United States, and prohibit the sale or trade of Pacific bluefin within the country. For instance, most of the Pacific bluefin captured by Mexico, and then fattened in open-ocean pens before being slaughtered, is sent to Tokyo via United States ports, according to Boustany. An endangered listing would ban that activity.

Bluefin tuna travel great distances across the ocean, through waters governed by many different nations—including Japan, where the bluefin’s fatty pink flesh is highly prized for making excellent sashimi. The migratory nature of the bluefin has made sustainable fishery management a challenge, since it requires the close cooperation of numerous national governments.

It’s also part of the reason why protection under the Endangered Species Act would have limited effects on the fishery and the species’ population. Of the 37 million pounds of Pacific bluefin caught by fishermen in 2014, Americans caught just 2 percent, according to data provided by Michael Milstein, a public affairs officer with NOAA Fisheries. (Japan took about half and Mexico almost 30 percent.)

Likewise, a relatively small amount of Pacific bluefin is consumed in the United States. According to federal catch data, the United States imported only about 3 percent of 2014’s landings of Pacific bluefin tuna.

The United States’ small role in the bluefin industryis why some conservationists feel listing the Pacific bluefin as endangered would be largely symbolic.

“It would affect fishing for Pacific bluefin in U.S. waters and would also stop imports of Pacific bluefin into the States, and that would send a major signal to the global market” that current fishing trends are not sustainable, said restaurateur and seafood sustainability consultant Casson Trenor, whose San Francisco sushi restaurant group Tataki has vowed never to serve bluefin tuna.

Buzz Brizendine, captain of the San Diego-based recreational fishing boat The Prowler, said he thinks listing Pacific bluefin, and thereby banning fishing for the species, would be unfair and relatively ineffective.

“Recreational fishermen have already had their daily bag limit on Pacific bluefin reduced from 10 to two fish,” said Brizendine, who takes customers fishing for bluefin in the summer months. “We’ve already made a significant contribution to reducing the catch.”

Brizendine sits on the Pacific Fishery Management Council, the advisory panel that makes recommendations to the U.S. government on how to manage many species. He said efforts to reduce mortality of Pacific bluefin must be focused on the western Pacific—the waters near Asia—where more than three-fourths of the catch is taken.

Some depleted but commercially valued fishes, like several strains of chinook salmon and a handful of rockfish species, have been afforded strict protections by the federal government. Kilduff notes that her organization petitioned the U.S. fisheries service in 2014 to add the Pacific bluefin to its list of species that can’t be fished under regulations.

“They denied that petition [two weeks ago],” she said. “So, we’ve tried to get them to take action before, and they haven’t.”