High Speed Cameras Capture Mosquito Larvae ' Harpooning' Prey With Their Heads HEAD TOPICS

High Speed Cameras Capture Mosquito Larvae ' Harpooning' Prey With Their Heads

10/21/2022 5:50:00 AM

How do mosquito larvae catch their prey By using their heads

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ScienceAlert

High Speed Cameras Capture Mosquito Larvae 'Harpooning' Prey With Their Heads How do mosquito larvae catch their prey By using their heads T. amboinensisThe next step, which would take more than 20 years to realize, was finding out what the predators were doing and how they were doing it.s andOnce the study authors adapted the camera to film through a microscope, they held prey larvae with jeweler's tweezers to temp the predators, ultimately capturing footage of the larvae at 340 frames per second (fps). The scientists found that the larvae launched their heads using thrust from accumulated abdominal pressure, and bunches of tiny brushlike bristles around their heads spread like fans into"basket-like arrangements" that helped sweep prey toward the predators' gaping and sharp-toothed jaws, the study authors wrote. Read more:
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I love a feel good story to start my day. , who's now a professor emeritus in the Department of Evolution, Ecology, and Organismal Biology at The Ohio State University in Columbus.The Columbus Dispatch.The footage shows a woman pulling up in a white SUV and leisurely taking apart the gangly ghoulish decoration.Although the arches and spires look solid, they are actually ever-changing, semi-transparent clouds of gas and dust. frameborder="0″ allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen> In that class, as T. amboinensis larvae responded to prey, students watched the larvae under a microscope – or at least they tried to. "We all saw a blur; then we saw a captured larva being shoveled into the mouth of a predator. Ruskin said that the victims hope that the security footage will lead to the identification of the brazen bone rustler. That's all we saw," Hancock told Live Science. The next step, which would take more than 20 years to realize, was finding out what the predators were doing and how they were doing it. Hancock and his co-authors began filming experiments with T. amboinensi s and P. ciliata in the 1990s, using the fastest-available optical system: A 16-millimeter film camera that had been designed for the US military to track missiles. Once the study authors adapted the camera to film through a microscope, they held prey larvae with jeweler's tweezers to temp the predators, ultimately capturing footage of the larvae at 340 frames per second (fps). Most of the time,"the predators would make a little body movement when the prey was introduced to their environment," which would signal to the researchers that it was time to hit the button on the film camera, Hancock said. "Body arching and head twisting" The scientists found that the larvae launched their heads using thrust from accumulated abdominal pressure, and bunches of tiny brushlike bristles around their heads spread like fans into"basket-like arrangements" that helped sweep prey toward the predators' gaping and sharp-toothed jaws, the study authors wrote. P. ciliata "typically struck in a straight-ahead (axial-linear) fashion," according to the study, while strikes by T. amboinensis "often involved a great deal of both body arching and head twisting." frameborder="0″ allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen> "All scientists get excited about their discoveries, but this kind of science – these visual discoveries – are special," Hancock said. But and P. ciliata larvae are active predators, and the scientists wondered if similar methods might be used by species that combined hunting with filter feeding. After funding dried up, the project was put on hold until 2020, when the researchers were finally able to revisit that question. This time, they used a high-definition video camera capable of shooting up to 4,352 fps, with which they recorded S. cyaneus larvae in specially designed"arenas" of death. The predatory action they saw, in which the larvae used their tails to swiftly sweep prey into their waiting mouths, was also previously unknown; like the head-launching strikes, hunting with tail sweeps took about 15 milliseconds from start to finish and was"spectacular," Hancock said. frameborder="0″ allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen> Once S. cyaneus gripped its victim, the larvae's mandibles"opened and closed so that their serrated teeth tore into the prey," according to the study. Future studies could explore how common harpoon-headed hunting and tail sweeping are across the mosquito lineage, by"getting my cameras on as many different kinds of mosquitoes as possible," Hancock said."There's a much bigger story to be told. " Related content: .