Mind, Brain, and Behavior

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Discover Magazine Speaks with Biology Professor Bruce Robertson About Evolutionary Traps

Evolutionary traps are problems, most often human-created changes to the environment, which animals encounter and are not prepared for through natural selection. For example, toxic plastics that look like food or artificial lights that mimic stars in the night sky but have no navigational value. Animals lack the behavioral tools to handle them and thus make maladaptive choices that make it difficult for them to survive. Discover magazine talks to Bard Associate Professor of Biology Bruce Robertson and cites his research on some of the most concerning evolutionary traps, such as sea turtle hatchlings heading inland instead of into the water due to being confused by beachfront lights or Australian death adders poisoning themselves by preying on non-native toad species. “Traps will cycle populations toward extinction extremely rapidly,” Robertson says. “They’re like demographic black holes.” 

Post Date: 09-30-2024

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Psychologist Sarah Dunphy-Lelii Considers the Politics of Sudden Power Transfer Among Chimpanzees

In “The Chimpanzee Wars,” a recent post to Wild Cousins, her Psychology Today UK blog, Associate Professor of Psychology Sarah Dunphy-Lelii engages in a thought experiment about how the state of knowing and of understanding of who knows and who doesn’t know could potentially impact the politics of power transfer within dominance hierarchies of chimpanzees. 

Among more than 200 Ngogo chimpanzees living in Kibale National Park, Uganda, one undisputed alpha named Jackson ruled for years until internal conflicts split the largest known chimpanzee community into two warring factions—Westerners and Centrallers. After Jackson is killed from injuries sustained in a battle, no younger alpha males step up to seize leadership of the Centrallers. A likely explanation, according to researchers, is that they didn’t know Jackson was dead. Only one Centraller, a potential alpha named Peterson, witnessed his death, and none found his body. Theoretically, Peterson could have used this position to his advantage. “Chimpanzees are socially sophisticated. Their dominance hierarchies are not based solely on physical strength. What we might call politics—the accumulation of social capital through strategic alliances over time—play a significant role in the rise to leadership. Under conditions like this one, between the Westerners and the Centrallers, insight into others’ states of knowledge could be decisive,” writes Dunphy-Lelii. She notes, however, that evidence to date suggests chimps, like Peterson, are not using this information the way humans would. 

Post Date: 05-02-2023

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Associate Professor of Psychology Sarah Dunphy-Lelii on the Challenges and Weirdness of Watching Yourself on Zoom

“That slight asynchrony we like between ourselves and others is unpleasantly magnified by glitchy wifi,” writes Dunphy-Lelii in Scientific American. “Research shows that a response delay of as little as 1.2 seconds disrupts your feeling of connection with another person. You can’t read them, they can’t read you—are they laughing with you, or at you?”

Post Date: 08-06-2020