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6. Cats Past and Present: A hallmark of its thirty-million-year evolution--a cat's a cat

Author

Losos, Jonathan B.

Subjects
Cats -- Natural history -- Growth -- Behavior, Fossils -- Natural history, Company growth, Anthropology/archeology/folklore, Biological sciences, Earth sciences, Science and technology, Zoology and wildlife conservation
Abstract

Traditionally, fossil records have been key to deducing how species change and diverge over time. But paleontologists who have taken this approach in studying cat evolution have been hampered by [...]

Published
2023

17. Predation-associated modulation of movement-based signals by a Bahamian lizard

Author

Steinberg, David S, Losos, Jonathan B, Schoener, Thomas W, Spiller, David A, Kolbe, Jason J, and Leal, Manuel

Subjects
Basic Behavioral and Social Science, Behavioral and Social Science, Animals, Female, Lizards, Male, Predatory Behavior, communication, signal modulation
Abstract

Signaling individuals must effectively capture and hold the attention of intended conspecific receivers while limiting eavesdropping by potential predators. A possible mechanism for achieving this balance is for individuals to modulate the physical properties of their signals or to alter the proportion of time spent signaling, depending upon local levels of predation pressure. We test the hypothesis that prey can alter their visual signaling behavior to decrease conspicuousness and potentially limit predation risk via modulation of signal properties or display rate. To do so, we conducted a manipulative experiment in nature to evaluate the possible effect of predation pressure on the physical properties of movement-based signals and on the proportion of time spent signaling by using a well-understood predator-prey system in the Bahamas, the semiarboreal lizard Anolis sagrei, and one of its main predators, the curly-tailed lizard Leiocephalus carinatus. We find that on islands onto which the predator was introduced, male anoles reduce the maximum amplitude of head-bob displays but not the proportion of time spent signaling, in comparison with control islands lacking the predator. This reduction of amplitude also decreases signal active space, which might alter the reproductive success of signaling individuals. We suggest that future studies of predator-prey interactions consider the risk effects generated by changes in signals or signaling behavior to fully determine the influence of predation pressure on the dynamics of prey populations.

Published
2014

25. Predator-induced collapse of niche structure and species coexistence

Author

Pringle, Robert M., Kartzinel, Tyler R., Palmer, Todd M., Thurman, Timothy J., Fox-Dobbs, Kena, Xu, Charles C. Y., Hutchinson, Matthew C., Coverdale, Tyler C., Daskin, Joshua H., Evangelista, Dominic A., Gotanda, Kiyoko M., A. Man in ’t Veld, Naomi, Wegener, Johanna E., Kolbe, Jason J., Schoener, Thomas W., Spiller, David A., Losos, Jonathan B., and Barrett, Rowan D. H.

Published
2019
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