Alan H. Krakauer

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Daniel T. Blumstein*, Daniel J. Mennill, Patrick Clemins, Lewis Girod, Kung Yao, Gail Patricelli, Jill L. Deppe, Alan H. Krakauer, Christopher Clark, Kathryn A. Cortopassi, Sean F. Hanser, Brenda McCowan, Andreas M. Ali and Alexander N. G. Kirschel Department of Ecology and Evolutionary Biology, University of California, 621 Young Drive South, Los Angeles,(More)
In the few species of birds in which males form display partnerships to attract females, one male secures most or all of the copulations. This leads to the question of why subordinate males help in the absence of observable reproductive benefits. Hamilton's concept of kin selection, whereby individuals can benefit indirectly by helping a relative, was a(More)
Evolutionary biologists have developed several indices, such as selection gradients (β) and the opportunity for sexual selection (I(s) ), to quantify the actual and/or potential strength of sexual selection acting in natural or experimental populations. In a recent paper, Klug et al. (J. Evol. Biol.23, 2010, 447) contend that selection gradients are the(More)
a Section of Ecology, Behavior, and Evolution, University of California, San Diego, CA, U.S.A. Department of Biological Science, Florida State University, Tallahassee, FL, U.S.A. Department of Evolution and Ecology, University of California, Davis, CA, U.S.A. Museum of Vertebrate Zoology, University of California, Berkeley, CA, U.S.A. Department of(More)
There is increasing evidence that individuals in many species avoid areas exposed to chronic anthropogenic noise, but the impact of noise on those who remain in these habitats is unclear. One potential impact is chronic physiological stress, which can affect disease resistance, survival and reproductive success. Previous studies have found evidence of(More)
Studies have found that some birds use vocalizations with higher minimum frequency in noisy areas. Minimum frequency is often measured by visual inspection of spectrograms (“by-eye practice” (BEP)), which is prone to bias, e.g., if low-frequency components are masked by noise. We tested for this bias by comparing measurements of minimum frequency obtained(More)
Economists study negotiation as a series of events—partner choice, information gathering, bargaining, etc.—with each step of the process affecting the outcome of the next, and the optimal decision at each stage depending on the player’s bargaining power. The context in which these negotiations occur—the market—is critical, since players can adjust their(More)
Males in many species have complex, multicomponent sexual signals, and there may be trade-offs between different signal components. By adjusting their signaling behaviors, males may be able to produce more attractive courtship displays in the face of these trade-offs, but this possibility has rarely been tested. In this study, we examined adaptive(More)
Although birds are generally known for their vocally produced songs and calls, some species have evolved alternate means of acoustic communication that do not require the syrinx. While many of these mechanical sounds are used in a courtship context, the importance of amongand within-individual variation in these sounds is almost entirely unknown. We(More)