... and histological analysis provide new insights into how social dominance affects the morphological and functional organization of the posterior tubercular nucleus implicated in regulating spinal motor circuits. Aggression Dopamine Diencephalon Mauthner neuron Social dominance Zebrafish National...

... similar to that of the Mozambique tilapia, territorial males showed higher expression of AVT mRNA in the gigantocellular nucleus than non-territorial males, and AVT mRNA levels correlated with aggressive behaviour (Greenwood et al., 2008). Thus, even though AVT appears related to agonistic behaviour...

...Rose L. Tatarsky; Zilin Guo; Sarah C. Campbell; Helena Kim; Wenxuan Fang; Jonathan T. Perelmuter; Eric R. Schuppe; Kevin W. Conway; Hudson K. Reeve; Andrew H. Bass ABSTRACT Acoustic behavior is widespread across vertebrates, including fishes. We report robust acoustic displays during aggressive...

... are not well understood in many animals. Here, we examined these influences in the praying mantis Tenodera sinensis by presenting perching individuals with alternating sinusoidally moving prey-like stimuli and rapidly expanding looming stimuli then scoring their behavior on a defensive–aggressive scale...

...Rachel E. Monyak; Nicole M. Golbari; Yick-Bun Chan; Ausra Pranevicius; Grace Tang; Maria Paz Fernández; Edward A. Kravitz ABSTRACT Many animal species show aggression to gain mating partners and to protect territories and other resources from competitors. Both male and female fruit flies...

... predominantly with freezing behavior, whereas animals deprived of all sensory communication mostly responded by performing escape tail-flips. Next, we used the same housing conditions in between repeated fights in pairs of crayfish. Aggressive and submissive behaviors increased in subsequent fights both after...

..., such as Siberian hamsters (Phodopus sungorus), are more aggressive during the short-day photoperiods of the non-breeding season, despite gonadal regression. While our previous data suggest that Siberian hamsters employ a ‘seasonal switch’ from gonadal to adrenal regulation of aggression during short-day...

... social behaviors. Dsk knockdown significantly increased social isolation-induced aggression. Genetic activation or silencing of Dsk neurons each similarly increased isolation-driven aggression. Our results suggest a U-shaped dependence of social isolation-induced aggressive behavior on Dsk signaling...

...Stephen T. Ferguson; Kyu Young Park; Alexandra A. Ruff; Isaac Bakis; Laurence J. Zwiebel ABSTRACT In eusocial ants, aggressive behaviors require the ability to discriminate between chemical signatures such as cuticular hydrocarbons that distinguish nestmate friends from non-nestmate foes. It has...

... that sexual selection on male aggressive performance has played a role in the evolution of the human musculoskeletal system and the evolution of sexual dimorphism in hominins. * Author for correspondence ([email protected]) Competing interests The authors declare no competing or financial...

... responses if the injected animal was opposed by a smaller or larger rival: the level of aggressiveness of the injected crayfish was higher when facing a larger rival but lower when facing a smaller rival. Our results indicate that the effects of 5-HT on aggressiveness are dependent on the perception...

... or the complex signal as a whole. Here, we examined laterality in lizard responses to determine whether receivers separate the processing of motion and colour signal components in different brain hemispheres. In Psammophilus dorsalis , males display colours that dynamically change during courtship and aggressive...

... modulated their aggressive behaviours depending on both their own status and their opponent's status. We found no influence of lipid stores or size on the onset of fights. However, differences in cuticular chemical signatures linked to fertility status accurately predicted the probability of behaving...

... of events is performed and regulated depending on a variety of factors that are both extrinsic and intrinsic to the colony. We present our current knowledge on the neural bases of honeybee aggression and highlight research avenues for future studies in this area. We present a brief overview...

... line system during aggressive behaviors is unknown. The aim of this study was first to characterize the lateral line system of the African cichlid fish Astatotilapia burtoni and second to determine the role of mechanoreception during agonistic interactions. The A. burtoni lateral line system is similar...

...Nadine Provençal; Linda Booij; Richard E. Tremblay; Hans H. Hoppeler Longitudinal epidemiological studies with birth cohorts have shown that physical aggression in humans does not appear suddenly in adolescence as commonly thought. In fact, physically aggressive behaviour is observed as early as 12...

...Leslie A. Dunham; Walter Wilczynski Arginine vasotocin (AVT) is a potent regulator of social behavior in many species, but little is known about its role in reptilian behavior. Here we examine the effect of exogenous AVT on aggressive responding and courtship behavior in the green anole lizard...

...Jasmine L. Loveland; Natalie Uy; Karen P. Maruska; Russ E. Carpenter; Russell D. Fernald Serotonin (5-HT) inhibits aggression and modulates aspects of sexual behaviour in many species, but the mechanisms responsible are not well understood. Here, we exploited the social dominance hierarchy...

.... Dopamine levels were also positively correlated with increased ovarian activity among gamergates. Next, we experimentally induced workers to compete in a reproductive tournament to determine how dopamine may be involved in the establishment of a new hierarchy. Dopamine levels rose in aggressive workers...

...Tobias Backström; Andreas Pettersson; Viktoria Johansson; Svante Winberg Corticotropin-releasing factor (CRF) is central in the stress response but also modulates several behaviors including anxiety-related behaviors and aggression. In this study, juvenile rainbow trout (Oncorhynchus mykiss) were...