Wendy Erb has spent countless hours studying orangutans in Borneo's tropical peat forests to learn how Borneo's male orangutans behave. .Pongo pygmaeus wurmbii) connect. In doing so, she discovered the undeniable benefits of understanding orangutan language. That means nearby scientists will have to be careful not to cause chaos when the male decides to show off his power by uprooting a nearby tree.
“I often wonder which of these snags are directed at our neighboring orangutans, and which are a message to us to give them space.”
“Orangutans have extraordinary strength, and large males like to find dead trees and shake them, pushing and pulling them until they fall with a tremendous (and impressive) impact.” he told Salon. “Therefore, orangutan researchers must remain vigilant while these giants move through the tree canopy. These fallen trees can pose a great danger to us bipedal humans.” However, while the males may not notice nearby dead trees while building their night nests, these males never miss a chance to show off their strength.
Erb and his colleagues don't know orangutans, so to speak, so they can't know whether these males ever tried to warn them while figuratively and literally flexing their muscles. But perhaps it will someday. Because, in a recent study published today in the journal PeerJ Life & Environment, both a tropical and behavioral ecologist at Cornell University and his colleagues found that orangutans make extremely complex vocalizations when calling to each other from long distances. Because it's clear that you have it.
Researchers set out to find out how many types of orangutan long calls there are, how they can be distinguished, and how they are graded. They observed the sounds of 13 male orangutans and were careful not to disturb them. Using speech analysis techniques, including machine learning, the researchers found that orangutans' long calls contained only two to four broadly differentiated vocal types. Among these vocal types, orangutans produce a diverse spectrum of intermediate types, producing sounds that can be combined into different sequences within a single vocalization.
This study confirmed that orangutans have advanced communication skills comparable to other primates such as chimpanzees. At the same time, this paper only scratches the surface in terms of fully grasping the complexity of orangutan communication.
“Voice complexity is an important concept in animal communication, thought to be shaped by an animal's social and physical environment, but a unified framework for quantifying complexity is lacking. ,” Erb said. “For species like orangutans, whose sounds are distributed along a 'gradual' continuum, we still don't know how to interpret an apparently small number of 'discrete' sounds.” However, we are fairly confident that there are still many complexities to unravel on this issue. Great ape vocal systems. ”
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“Much work remains to uncover this complexity and its importance in the evolution of animal communication systems.”
Learning more about orangutan vocalizations may ultimately allow scientists to better understand how humans learned to speak. All species develop the complexity of their vocalizations due to evolutionary influences such as sexual selection, habitat specifics, specific social structures, and pressure from predators. For example, the authors write:Poecil atricapillus) Groups and individuals have the flexibility to increase the types of notes they take when in larger groups, possibly increasing the number of potential messages that can be conveyed. ”
Humans can produce far more sophisticated sounds than other primates, but it's unclear how more primitive primates developed that ability, and how we learned it. There is still a direct link between developing abilities. But for that to happen, scientists first need to understand how the more “gradual” vocalizations employed by animals like orangutans can effectively convey meaning. be.
“Our study points to the need to develop comparative frameworks to quantify and compare intraspecific and interspecific complexity using such graded repertoires,” Erb said. Ta. “Much work remains to uncover this complexity and its importance in the evolution of animal communication systems.”
Researchers dream of a future where humans can converse with orangutans, chimpanzees, and other primates as easily as they do with each other. While that day is certainly far in the future, it will no doubt be useful to future scientists like Erv, at least if they want to avoid unintended casualties of orangutan masculinity.
“In the dark, it's much harder to tell which way a tree will fall, so we were extremely lucky to come through this thumping wake-up call unscathed,” Erb said. “I often wonder which of these snags are directed at our neighboring orangutans, and which are a message to us to give them space.”
