21, Jul 2023
Marine Hunters Track Down Food Areas of Interest in Marine Swirls

A recent study has revealed a remarkable discovery about how marine predators such as tuna, billiards and sharks catch food and gather in countercyclical ocean eddies that rotate clockwise.

The scientists who led the study are from the Woods Hole Oceanographic Institution (WHOI) and the Applied Physics Laboratory at the University of Washington (UW APL). The scientists collaborated with the National Pacific Islands Oceanic and Atmospheric Fisheries Center (NOAA).

Currents are general patterns of ocean current. While ocean eddies are the most circular currents, according to the National Ocean Service. Ocean eddies contain more food sources, which means that they serve as mobile hotspots in the vast oceanic desert, from which predators want to feed.

The study explained that when countercyclical vortices move on the high seas, predators circulate with them and feed on biomass at great depths. Foraging means that animals rely on their food sources in the wild, and oceanic predators hunt animals for food.

In addition, the researchers focused on the study of fishing patterns in marine eddies. He claimed that ocean eddies affect the open oceanic ecosystem in the food chain cycle, according to Science Daily.

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Dr. Martin Arostegui, who postdoctoral fellow and lead author of the paper, said that the abundance of predators in marine eddies may be motivated by the selection of predators for better habitats with feeding opportunities.

The study focused on more than 20 years of commercial fishing and satellite data generated from the subtropical vortex in the North Pacific. It is said that the place is a huge nutrient-poor area, and they treat predatory fish, which are central to the food and economic security of people in Pacific Island states and communities.

In addition, he added that the researchers assessed the large ecological community of predators with different latitudes, sea depths and physiologies from cold-blooded to warm-blooded.

Despite the great interest in the same research on the attitudes of marine predators and their connections with marine eddies, the new discovery is the first to focus on the subtropical eddy, or the largest ecosystem on Earth. A related study or research is crucial for effective management of this kind.

The study shows that scientists have studied the isolated behavior of predators in many areas by following the diving patterns of the animals down to the sea layers and twilight zones. However, it is important to understand the behavior of eddies on the high seas, with foods that are rich or scarce in food.

Shallow and deep oceans

The study underlines the importance of the connection between the surface and the deep sea, which can be taken into account for future research or industries on the high seas.

Dr. Arostegui said that the ocean benefits both predators and humans. The latter serves as a source of nutrition. The way food is brought or harvested is crucial for ensuring food security, how prey and predators bind and depend on each other.

While deep-sea fishing is growing, it is necessary to understand its behavior and ecology, in particular, about how fishing can harvest without negatively affecting predators.

In addition, the results showed that understanding the ecosystem in deep ocean eddies will promote environmentally friendly use of the resources of the deep oceans.

The full history of the study can be viewed here: how marine predators find food hotspots in open oceanic “deserts”.

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