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"Unbelievable": first ever record of the fastest fish in the world catching a tuna fish - voila! tourism

2023-02-27T22:04:15.594Z


Researchers were able to record for the first time 24 hours in the life of a manatee fish in an attempt to understand how it hunts its prey when it is alone


The interpreter is built differently (@discovery)

When did you get to swim next to the fastest fish in the world in pursuit of a tuna fish?

A new and first-of-its-kind documentary gives a glimpse into 24 hours in the life of an anglerfish, one of the most mysterious fish in the ocean.



It's quite understandable why experts see a challenge in tracking the world's fastest fish.

The sailfish (Istiophorus platypterus) belongs to a group of fish called source fish.

It is famous for its unique appearance, strength and speed of hunting, but little is known about how the starfish hunts when it is not with its pack, mainly because it is difficult to keep up with it.

In fact, to date, researchers have not been able to do this.



When it comes to group hunting, there are well-documented cases of "baitball" hunting, where a group of anglers will drive a ball of prey fish to the surface of the ocean.

Then, individually they will be able to enter the trapped bait ball to eat.

However, apart from this hunting technique, these fish are often considered to be solitary predators and there is no record of any other hunting technique.

This is how it looks

The anteaters are thought to have a high metabolic rate due to their size, however this has not been studied as they are very difficult to keep in captivity.

In a new study, researchers were able to attach to a single 45-kilogram sailfish in the tropical eastern Pacific Ocean a portable data logger with sensors and a camera to track what the fish manage to do over a 24-hour period.



Thanks to this achievement, a team of researchers from Nova Southwestern University in Florida got to see for the first time how the solitary anteater captures its prey.

The researchers were able to record the sailboat hunting a tuna fish, while making multiple efforts to capture it, it turns out - when the tuna tried to hide by swimming close to the sailboat so that it would not see it due to the fish's problematic peripheral vision.



Although the video does not show the angler catching the tuna (because the fish's mouth cannot be seen), after about 60 seconds the fish performs a "head shake" that researchers say often indicates ingestion or manipulation of prey, suggesting that the angler Successfully caught the tuna fish.

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While sailfish are considered the fastest in the world with a maximum speed of about 8.2 meters per second, this fish only reached a maximum speed of 3.1 meters per second during the pursuit of the tuna.

However, the team estimates that the angler has more maneuverability when chasing the tuna at a slower speed, rather than swimming as fast as possible and not being able to keep up with the prey's rapid turns and changes of direction.



Based on data collected from the database along with the photographic documentation, the researchers estimated that the angler needs about half a ton like the one it hunts every day to meet its energy requirements.



The team released the first-of-its-kind documentation of a single-interpreter hunting event—with over 24 hours of individual behavioral data and active metabolic rate estimates.

They suggest the research could serve as a starting point for improving understanding about these impressive ocean predators.

"This study improves our understanding of the hidden lives of the ecologically and economically important kingfishers," said Dr. Mahmoud Shibji, co-author of the study and director of the Guy Harvey Research Institute at Nova Southwestern University. "Such knowledge is essential to help We need to better protect the health of these fish and their prey so that we have a sustainable sport fishing industry for many years to come."



The article was published in Scientific Reports.

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Source: walla

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