Extinction Looms for World’s Smallest Porpoise

Illegal gillnet fishing kills vaquitas when the Critically Endangered porpoises are entangled in the nets. May 2015 (Photo by Oaxaca Capital)


LA JOLLA, California, March 18, 2019 (ENS) – Only 10 vaquita porpoises likely remain in the world, marine mammal scientists reveal in a new report,  warning that the animal’s extinction is certain without bold, immediate action to remove gillnets from their habitat.

Between 1997 and 2019, gillnets killed hundreds of vaquitas, the world’s smallest and most endangered porpoises, found only in Mexico’s northern Gulf of California. Their estimated population dropped from close to 600 in 1997 to fewer than 20 animals today, according to the International Committee for the Recovery of the Vaquita, CIRVA.

Illegal gillnet fishing kills vaquitas when the Critically Endangered porpoises are entangled in the nets. May 2015 (Photo by Oaxaca Capital)

The release of the new vaquita assessment comes two days after reports of the first vaquita mortality of 2019.

The announcement from CIRVA calls on Mexico President Andres Manuel Lopez Obrador to end all gillnet fishing in the vaquita’s small remaining habitat and adopt a “zero tolerance” policy for enforcement of the ban.

CIRVA is an international team of scientific experts assembled in 1996 to assist in vaquita recovery efforts. In their report, CIRVA scientists warn the Mexican Government, “As you know, the vaquita is on the edge of extinction and, unless action is taken now, the species will be lost within a few months or years during your administration.”

“No more than 22 vaquitas remained alive during the summer of 2018, prior to the current fishing season,” the CIRVA report states. “Each year, half of the remaining vaquitas are killed in illegal fishing nets set for another endangered species, the totoaba.”

The totoaba, Totoaba macdonaldi, a marine fish, the largest member of the drum family, is found only in the Gulf of California. Once abundant and subject to an intensive fishery, the totoaba has become rare and is now listed as Critically Endangered on the IUCN’s Red List of Threatened Species.

Totoaba and Vaquita
A vaquita, bottom, died as bycatch with the desired species, a totoaba, that the man is holding in his arms. 1992 Sonora, Mexico. (Photo courtesy NOAA)

“Poachers prize totoaba for their swim bladders, which are dried and smuggled by organized crime cartels to China, where they are sold on the black market for prices that can reach US$46,000 per kilogram,” CIRVA reports.

Totoaba swim bladders are highly valued for their perceived medicinal properties.  The bladders are erroneously believed by many Chinese to be a treatment for fertility, circulatory, and skin problems.

“The acoustic monitoring program indicates that the few remaining vaquitas inhabit a very small area, approximately 24 x 12 km, most of which lies within the Vaquita Refuge,” the CIRVA report says. “However, high levels of illegal fishing for totoaba occur in this area.”

“This precipitous population decline has continued despite the actions taken by the Government of Mexico,” the scientists write, “where the last few vaquitas remain. This is not an impossible task, as the area to be protected is not large.”

“However,” CIRVA warns, “reports from the region suggest that the illegal fishery is growing, and there have been several recent episodes of violence by illegal fishermen directed at net removal vessels and their crews, legal fishermen, and even the Mexican Navy.”

The vaquita die entangled in illegal gillnets set for shrimp and other fish species, including endangered totoaba.

In 2017, in the face of international pressure, Mexico banned the use of most gillnets within the vaquita’s range, but there has been little enforcement of the ban. During the 2018 illegal totoaba fishing season, nearly 400 active totoaba gillnets were documented in a small portion of the vaquita’s range, and gillnets continue to be found within the vaquita refuge.

The recent violence against conservationists in the region has limited critically important net removal efforts. Now four U.S. conservation advocacy groups have joined in a written plea to the Mexican President to get rid of the gillnets once and for all. They are: the Animal Welfare Institute, the Center for Biological Diversity, the Environmental Investigation Agency, and the Natural Resources Defense Council.

“If Mexico doesn’t want to be guilty of wiping out a species, it needs to secure 100 percent gillnet-free habitat now,” said Zak Smith, senior attorney with the Marine Mammal Protection Project of the Natural Resources Defense Council.

“What’s happening to the vaquita is a disgrace and entirely preventable, yet the Obrador administration has not committed to a robust vaquita recovery plan and has already missed deadlines on vaquita conservation commitments,” Smith said.

Vaquita mother “Ana” with her 2018 calf demonstrating that vaquitas are healthy and can give birth annually. Sept. 26, 2018. (Photo by Oscar Ortiz courtesy CIRVA)

Despite the marine mammal’s alarming decline, CIRVA emphasized that the vaquita is not extinct and that recovery remains possible. The vaquita are still producing offspring, and the remaining animals are healthy, showing no signs of disease or malnutrition.

The international community plays a critical role in vaquita conservation.

“The organized criminal networks trafficking totoaba swim bladders from Mexico to China are responsible for the illegal fishing nets driving the vaquita to extinction,” said Clare Perry, ocean campaign leader for the London-based nonprofit Environmental Investigation Agency. “Unless Mexico gets serious about enforcement and works with China and key transit countries to dismantle those networks, there is no hope for the remaining vaquita.”

In 2018, a U.S. court temporarily banned the import of seafood caught with gillnets in vaquita habitat. This year, parties to the Convention on International Trade in Endangered Species, CITES, and the World Heritage Convention are considering additional conservation measures for the vaquita and totoaba.

Copyright Environment News Service (ENS) 2019. All rights reserved.


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