Scientists Warn of Threat of Plastic Waste on Marine Life

A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
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Scientists Warn of Threat of Plastic Waste on Marine Life

A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)
A huge belt of plastic photographed floating off the coast of the Caribbean island of Roatan, Honduras. (AFP)

Scientists are warning that micro-plastics in the ocean and the toxic chemicals in them are posing a significant risk to giant animals like whales, sharks and manta rays that are marine filter feeders.

A new study published in the Trends in Ecology and Evolution journal said that such animals swallow thousands of cubic meters of seawater daily in an effort to capture plankton, in which case they can ingest micro-plastics directly from polluted water or indirectly through contaminated prey, the German News Agency (dpa) reported.

Micro-plastics are small plastic pieces less than five millimeters long, which are harmful to marine life.

The study added that plastic-associated chemicals and pollutants can accumulate over decades and alter biological processes in the animals, leading to altered growth, development and reproduction, including reduced fertility.

Elitza Germanov, lead researcher of the study, said: “While a definitive connection between micro-plastic ingestion and toxin exposure for filter feeders remains to be confirmed, studies into seabirds and small fish have found a link.”

The marine species are also in danger due to their habitat areas overlapping micro-plastic pollution hotspots like the Gulf of Mexico, the Mediterranean Sea, the Bay of Bengal and the Coral Triangle (an area from Malaysia to the Solomon Islands in the Pacific).

Many of the animals, like manta rays, are threatened species, so it is difficult to assess plastic concentrations via conventional methods, such as stomach analysis, Germanov said.

The study’s lead author explained: “So we are using the non-lethal sampling of small amounts of tissue, which we are testing for chemical tracers using sophisticated and sensitive analytical tools.”

Many of the filter-feeding animals live a long life, but have few offspring throughout their lives.

Maria Cristina Fossi, a co-author of the study, said another study she led on whale sharks in the Gulf of California and on fin whales in the Mediterranean Sea confirmed exposure to toxic chemicals.

“As these areas are hotspots for micro-plastics, our results could indicate that filter feeders are taking up micro-plastics in their feeding grounds,” she said.

Lately, there has been a large number of reports and studies on marine life facing an existential threat from the millions of tons of plastic waste that end up in the oceans each year.



Russian Man Survives Bear Attack as Sightings Near Moscow Increase

A person rides a bike at a park during a warm spring day in Moscow, Russia, 04 April 2025. (EPA)
A person rides a bike at a park during a warm spring day in Moscow, Russia, 04 April 2025. (EPA)
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Russian Man Survives Bear Attack as Sightings Near Moscow Increase

A person rides a bike at a park during a warm spring day in Moscow, Russia, 04 April 2025. (EPA)
A person rides a bike at a park during a warm spring day in Moscow, Russia, 04 April 2025. (EPA)

A brown bear attacked and badly mauled a Russian man in a forest about 125 km (78 miles) from Moscow, local media and residents said, as sightings of bears become more frequent in the region surrounding the capital.

The man, who apparently survived the attack by managing to play dead, was out collecting antlers shed by elk and deer last week when the bear attacked him from behind, a local news website quoted the man's uncle as saying.

"It began to gnaw at his skull, then turned (him) over and started eating his face," the victim's relative said. "Somehow, (he) pretended to be dead, and the bear left him alone."

Russian media said the injured man called emergency services and waited for hours while emergency crews searched for him on foot in the forest near the village of Yeremeevo. He was then taken to hospital by helicopter.

Bear hunting is allowed in much of Russia, but is banned in the Moscow region.

Some Russians go out in the forest to collect antlers, a pair of which can sell for up to 15,000 roubles ($178), about two-thirds of Russia's minimum monthly wage.