Hope Floats in the Amazon as Bacuri, a Young Manatee, Fights for Survival

Bacuri, a rescued manatee, breathes while swimming in a pool at the Emilio Goeldi Museum's scientific station in the Caxiuana National Forest in Para state, Brazil, Thursday, March 20, 2025. (AP)
Bacuri, a rescued manatee, breathes while swimming in a pool at the Emilio Goeldi Museum's scientific station in the Caxiuana National Forest in Para state, Brazil, Thursday, March 20, 2025. (AP)
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Hope Floats in the Amazon as Bacuri, a Young Manatee, Fights for Survival

Bacuri, a rescued manatee, breathes while swimming in a pool at the Emilio Goeldi Museum's scientific station in the Caxiuana National Forest in Para state, Brazil, Thursday, March 20, 2025. (AP)
Bacuri, a rescued manatee, breathes while swimming in a pool at the Emilio Goeldi Museum's scientific station in the Caxiuana National Forest in Para state, Brazil, Thursday, March 20, 2025. (AP)

Deep in silence, as if under a spell, children watch intently as Bacuri, a young Amazonian manatee, glides around a small plastic pool. When he surfaces for air, some of them exchange wide smiles. The soft rustle of rainforest leaves punctuated by bird song adds to the magic of the moment.

The children from riverside communities traveled for hours by boat just to meet Bacuri at the Ferreira Penna Scientific Base of the Emilio Goeldi Museum, Brazil's oldest research institute in the Amazon. Despite their endangered status, manatees are still hunted and their meat illegally sold, and they are increasingly threatened by climate change. Environmentalists hope that by engaging local communities, Bacuri and others like him will be spared.

The Amazonian manatee is the region's largest mammal but is rarely seen, much less up close. The reasons for this are twofold: The manatee has acute hearing and will vanish into the murky water at the slightest sound; and its population has dwindled after being overhunted for hundreds of years, mostly for its tough hides that were exported to Europe and Central America.

To help the manatee population recover, several institutions are rescuing orphaned manatee calves, rehabilitating them and reintroducing them to the wild.

Bacuri weighed just 22 pounds (10 kilograms) - a fraction of the more than 900 pounds (400 kilograms) of an adult manatee - when he was rescued and taken to the federally protected Caxiuana National Forest. He was named after the local community that found him. Two years and several thousand milk bottles later, Bacuri has grown to about 130 pounds (60 kilos).

Three institutions are responsible for his care. The Goeldi Museum provides facilities and educates nearby communities. The federal Chico Mendes Institute for Biodiversity Conservation assigns two staffers for 15-day shifts to feed Bacuri three bottles of milk a day as well as chopped beets and carrots, and clean the pool every 48 hours. The nonprofit Instituto Bicho d'Agua - meaning institute of water animals in Portuguese - oversees veterinary care, dietary planning and caregiver training.

During their visit, the children learn that female manatees are pregnant for about a year then nurse their young for two more, feeding them from nipples behind their front flippers - the manatee equivalent of armpits. This long reproductive cycle is one reason the manatee population has not recovered from the commercial hunting that persisted until the mid-20th century.

They also learn the species is endangered and that they are the ones who must protect it.

"You are the main guardians," biologist Tatyanna Mariúcha, head of the Ferreira Penna scientific base, tells the children, who spend the rest of the day drawing and making Play-Doh models of Bacuri.

With its auditorium, dormitories, observation towers, cafeteria and laboratories, the research station - two hours by speedboat from Portel, the nearest city - stands in stark contrast to nearby communities comprising clusters of wooden houses on stilts where families rely on cassava farming, fishing and harvesting açaí berries. School field trips and community outreach aim to narrow the gap.

"Caxiuana is their home," Mariúcha told The Associated Press. "We can't just come here and do things without their consent."

Local knowledge will play a key role when Bacuri is finally released. He is the only manatee calf under care at Caxiuana. Once he has fully transitioned to a plant-based diet, he'll spend time in a river enclosure before his release. That site will be selected based on where residents say wild manatees feed and pass through.

If all goes as planned, Bacuri will be the first manatee released in the Caxiuana area. Two other calves rescued in poor health died in captivity, a sadly common outcome.

While subsistence hunting isn't a major threat to the species, some fishermen still sell manatee meat illegally in nearby towns. Brazil banned hunting of all wild animals in 1967, with two exceptions: Indigenous peoples are allowed to hunt, and others can kill a wild animal to satisfy the hunger of the hunter or his family.

The threat of hunters has become harder to manage due to climate change, said Miriam Marmontel, a senior researcher at the Mamirauá Institute for Sustainable Development, hundreds of miles (kilometers) upstream along the Amazon River.

Dozens of dolphins died near Mamiraua in 2023, likely due to soaring water temperatures during a historic drought. Manatees avoided mass mortality then because they typically inhabit deep pools during the dry season, but recent droughts have dramatically reduced the water level, making manatees more vulnerable to poachers.

"As climate change accelerates, manatees may begin to suffer from heat stress too," Marmontel said. "They also have a thermal limit, and eventually it may be crossed."

That's why reintroduction efforts are so important.

Around 60 rescued manatees are being cared for across the state of Para, where Caxiuana is located. Bicho d'Agua is caring for four in partnership with the Federal University of Para and Brazil's environmental agency. One of the four, named Coral, was found near Obidos and airlifted 620 miles (1,000 kilometers) to the institute's facility in Castanhal. She arrived dehydrated and with severe skin burns, likely from sun exposure.

"The population has declined so much that every hunted animal impacts the species," Renata Emin, president of Bicho d'Agua, told AP. "That's why any effort matters, not just because one individual may return to the wild and help rebuild the population but because of the community and government engagement it inspires."



KAUST Develops Deep Learning Tool for Pre-Pregnancy Human Embryo Evaluation

KAUST Develops Deep Learning Tool for Pre-Pregnancy Human Embryo Evaluation
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KAUST Develops Deep Learning Tool for Pre-Pregnancy Human Embryo Evaluation

KAUST Develops Deep Learning Tool for Pre-Pregnancy Human Embryo Evaluation

Researchers at King Abdullah University of Science and Technology (KAUST) have announced the development of a new deep learning tool, deepBlastoid, to study models of human embryo development in artificial laboratory conditions.

The KAUST scientists demonstrated that deepBlastoid can evaluate images of the models equally well as expert scientists, but 1,000 times faster, SPA reported.

The earliest stages of the human embryo are crucial for understanding fertility, pregnancy complications, and the origins of developmental disorders. However, direct research on human embryos is limited by ethical considerations.

Blastoids are cellular models that represent the embryo at a period known as the blastocyst stage. This stage begins about five days after fertilization and continues until the embryo has implanted itself into the mother's uterine wall (the moment of pregnancy). Importantly, the human blastoids in the KAUST study are composed of stem cells, but not embryonic tissue, and since their discovery in 2021, they have quickly become a preferred human model for scientists to study early embryo development.

In the new study, KAUST researchers trained deepBlastoid on over 2,000 microscopic images of blastoids. Then they used it to assess the effects of chemicals on blastoid development by examining over 10,000 additional images. Understanding how these chemicals can disrupt blastoids has profound implications for women who are taking prescription medicine or other drugs but seek to become pregnant.

"Little is known about the very early stages of embryo development. With deepBlastoid, we can scale up blastoid research to study embryo development and the effects of chemicals on the embryo and pregnancy," said KAUST Associate Professor and member of the KAUST Center of Excellence for Smart Health Mo Li, an expert in stem cell biology and whose lab pioneered embryo models using human blastoids.

He added that deepBlastoid will also help advance reproductive technologies, such as in vitro fertilization.

Generally, scientists evaluate blastoids manually by systematically reviewing a library's worth of images taken under a microscope. This approach not only requires time, but it is also sensitive to the scientist's knowledge and the method used to produce the blastoid, which can vary across laboratories. On the other hand, deepBlastoid can process 273 images per second, offering scientists a tool to assess tens of thousands of blastoids in just a few minutes.

"DeepBlastoid not only matches human performance in accuracy, it delivers an unparalleled increase in throughput. This efficiency allows scientists to analyze vast amounts of data in a short time, enabling experiments that were previously unfeasible," said KAUST Professor and member of the KAUST Center of Excellence for Generative AI Peter Wonka, an expert in deep learning and computer vision and whose research team developed deepBlastoid.

While Li, Wonka, and their colleagues used deepBlastoid to study the blastoid, they noted that by adapting the deep learning algorithm, their approach could be applied to other stem cell models for various embryo stages and organs.