Environmental groups are asking the U.S. government and international organizations to pressure Mexico to do more to save the vaquita marina porpoise, the world’s most endangered marine mammal
There was no immediate comment from Mexico’s government. In March, a legal fishing of totoaba would probably increase the deaths of vaquitas but would provide a windfall for some fishermen in Mexico.raised criticism by announcing it would consider several proposals that would almost certainly harm the vaquita. The government has not announced whether those proposals will be accepted. The Mexican inter-agency lifting endangered-species protection on the totoaba. Opening up
The group also said it is considering reducing the Colorado River theory posited that a decline of fresh water from the river due to U.S. usage had increased salinity in the upper Gulf, somehow affecting the vaquita.for the vaquita, which would open up more sites for gill nets used for totoaba and other species. The nets trap and drown vaquitas. The group also revived an old, discredited theory that blames the vaquitas’ decline on the lack of water flows from the U.S. through the Colorado River, which starts in the and empties into the Gulf of California. The
, the International Union for Conservation of Nature published a letter disputing that argument, saying that “the scientific community widely accepts that unsustainable mortality in gillnets (set for shrimp, totoaba and other finfish) is the cause of the vaquita’s rapid decline … There is no reason to seek an alternative explanation for the vaquita’s unprecedented decline.”
Mexico’s Environment Department has said the drop in the number of vaquitas and the area where they have been seen injustifies reducing the protection zone, which currently covers most of the upper Gulf. The site starts around the Colorado River delta and extends south past the fishing town of San Felipe and near Puerto Penasco. But such a move is also an admission the may never return to the entire historical range of its habitat.