Intraspecific deception by bluffing: a defense strategy of newly molted stomatopods (arthropoda: crustacea).

Effects of Testosterone Administration on Strategic Gambling in Poker Play

Testosterone has been associated with economically egoistic and materialistic behaviors, but -defensibly driven by reputable status seeking- also with economically fair, generous and cooperative behaviors. Problematically, social status and economic resources are inextricably intertwined in humans, thus testosterone's primal motives are concealed. We critically addressed this issue by performin...

Deception in Visual and Chemical Communication in Crustaceans

Deception in animal communication occurs when one animal causes another to respond to a condition that does not exist or to fail to respond to one that does. Signals that bluff produce the first kind of error, behavior that hides causes the second, and both are common in visual communication by crustaceans. In contrast, crustacean chemical communication may usually be honest because the communi...

Multimodal signals: ultraviolet reflectance and chemical cues in stomatopod agonistic encounters

Complex signals are commonly used during intraspecific contests over resources to assess an opponent's fighting ability and/or aggressive state. Stomatopod crustaceans may use complex signals when competing aggressively for refuges. Before physical attacks, stomatopods assess their opponents using chemical cues and perform threat displays showing a coloured patch, the meral spot. In some specie...

Bluffing with a pair of deuces the downside of successful deception

The evolutionary history of Stomatopoda (Crustacea: Malacostraca) inferred from molecular data

The crustacean order Stomatopoda comprises seven superfamilies of mantis shrimps, found in coastal waters of the tropics and subtropics. These marine carnivores bear notable raptorial appendages for smashing or spearing prey. We investigated the evolutionary relationships among stomatopods using phylogenetic analyses of three mitochondrial and two nuclear markers. Our analyses recovered the sup...