Breaking News
0

Mysterious manatee deaths in Mexican wetlands spurs quest for answers

Stock MarketsAug 10, 2018 05:00PM ET
Saved. See Saved Items.
This article has already been saved in your Saved Items
 
© Reuters. The lifeless body of a West Indian manatee, also known as sea cow, floats in the San Miguel river, in Jonuta

By Suman Naishadham

MACUSPANA, Mexico (Reuters) - In the swampy wetlands of southern Mexico, officials and researchers are struggling to explain the deaths of dozens of manatees, the chubby marine mammals once confused with mermaids by ancient mariners.

Fishermen who navigate the muddy waters inland from the coast of Tabasco state have discovered since May at least 28 dead West Indian manatees, also known as sea cows, along the Bitzal River and nearby streams.

The cause of the deaths remains a mystery. Locals report deaths of fish in the river and blame polluted water in an area that is near onshore and offshore drilling projects operated by national oil company Pemex.

The company says tests show no contamination in the area.

Other scientists wonder if the deaths of the placid animals, which divide their time between the ocean and inland rivers, are related to wider changes in the climate and rising sea levels.

"Whenever you see a die-off like this of a long-lived animal, it can be a canary in a coal mine," said David Gonzalez-Socoloske, a tropical mammal ecologist at Andrews University, a small private college located in Berrien Springs, Michigan.

"Beyond the concern for the species, it tells you that something is going on with the environment," he said.

Across the Gulf of Mexico in Florida, 92 manatees have died since January within an area where the growth of microscopic algae has caused a harmful "red tide," according to the Florida Fish and Wildlife Conservation Commission.

But the same type of algae, which only grows in sea water, cannot grow in Tabasco's fresh water where manatees have been perishing, said Ricardo Aguilar of Mexican wildlife advocacy group AZCARM. "The only relation is that the animals dying are manatees," Aguilar said.

Desperate to prevent more deaths while they investigate the cause, wildlife authorities in Mexico have vowed to capture and transfer about 30 of the gentle herbivores to a nearby nature reserve.

But capturing a manatee, which can weigh up to 1,100 pounds (500 kg), is difficult, said Leon Olivera-Gomez, a marine specialist at the Autonomous University of Tabasco and the rescue mission's lead scientist.

Before the capture, Olivera-Gomez said scientists use sonar to locate the animal. Then, a group of some 20 people on wooden boats surround and trap it with large fishing nets.

So far, the scientists have caught just two adults and a calf.

VULNERABLE POPULATION

Olivera-Gomez said around 500 manatees, which are distantly related to elephants, are believed to live in Tabasco's waterways. The International Union for Conservation of Nature, a leading wildlife conservation group, describes the population as vulnerable.

Past efforts in Mexico to save threatened marine mammals have seen mixed results.

In a bid last year to save the vaquita, a pint-sized porpoise that swims in the Gulf of California, two of the critically endangered animals were placed in a breeding program, but one died in captivity.

The manatee deaths highlight threats to the Gulf's lowland wetlands, which have historically been defined by seasonal rains and dry spells that scientists say will grow more extreme as global sea levels rise.

Climate swings, Gonzalez-Socoloske added, can make animals like manatees less resilient to disease-causing pathogens.

Tests around the district of Macuspana, the birthplace of President-elect Andres Manuel Lopez Obrador, plus waterways in Centla and Jonuta, have not shown any spills from oil activity, Pemex said in a statement on Tuesday.

Last month, Mexico's water authority CONAGUA collected samples from the Bitzal lagoon and said the water did not contain high enough levels of oil, metals or pesticides to explain the deaths.

However, Dennis Potenciano, 43, the leader of the fishing cooperative in Macuspana, home to around 700 fishing families, said oil contamination has killed numerous fish and made the water undrinkable.

"The government doesn't tell us anything," he said. "They treat us as if we are illiterate."

"We aren't catching anything because the river is so contaminated," he said, on the grassy edge of a shallow waterway where he and friends found 12 dead manatees, flies swarming around their stiff, upturned flippers.

Mysterious manatee deaths in Mexican wetlands spurs quest for answers
 

Related Articles

Add a Comment

Comment Guidelines

We encourage you to use comments to engage with users, share your perspective and ask questions of authors and each other. However, in order to maintain the high level of discourse we’ve all come to value and expect, please keep the following criteria in mind: 

  • Enrich the conversation
  • Stay focused and on track. Only post material that’s relevant to the topic being discussed.
  • Be respectful. Even negative opinions can be framed positively and diplomatically.
  •  Use standard writing style. Include punctuation and upper and lower cases.
  • NOTE: Spam and/or promotional messages and links within a comment will be removed
  • Avoid profanity, slander or personal attacks directed at an author or another user.
  • Don’t Monopolize the Conversation. We appreciate passion and conviction, but we also believe strongly in giving everyone a chance to air their thoughts. Therefore, in addition to civil interaction, we expect commenters to offer their opinions succinctly and thoughtfully, but not so repeatedly that others are annoyed or offended. If we receive complaints about individuals who take over a thread or forum, we reserve the right to ban them from the site, without recourse.
  • Only English comments will be allowed.

Perpetrators of spam or abuse will be deleted from the site and prohibited from future registration at Investing.com’s discretion.

Write your thoughts here
 
Are you sure you want to delete this chart?
 
Post
Post also to:
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Thanks for your comment. Please note that all comments are pending until approved by our moderators. It may therefore take some time before it appears on our website.
 
Are you sure you want to delete this chart?
 
Post
 
Replace the attached chart with a new chart ?
1000
Your ability to comment is currently suspended due to negative user reports. Your status will be reviewed by our moderators.
Please wait a minute before you try to comment again.
Add Chart to Comment
Confirm Block

Are you sure you want to block %USER_NAME%?

By doing so, you and %USER_NAME% will not be able to see any of each other's Investing.com's posts.

%USER_NAME% was successfully added to your Block List

Since you’ve just unblocked this person, you must wait 48 hours before renewing the block.

Report this comment

I feel that this comment is:

Comment flagged

Thank You!

Your report has been sent to our moderators for review
Disclaimer: Fusion Media would like to remind you that the data contained in this website is not necessarily real-time nor accurate. All CFDs (stocks, indexes, futures) and Forex prices are not provided by exchanges but rather by market makers, and so prices may not be accurate and may differ from the actual market price, meaning prices are indicative and not appropriate for trading purposes. Therefore Fusion Media doesn`t bear any responsibility for any trading losses you might incur as a result of using this data.

Fusion Media or anyone involved with Fusion Media will not accept any liability for loss or damage as a result of reliance on the information including data, quotes, charts and buy/sell signals contained within this website. Please be fully informed regarding the risks and costs associated with trading the financial markets, it is one of the riskiest investment forms possible.
Continue with Google
or
Sign up with Email