Neural basis of social behavior in vertebrates: a comparative approach.

The neural circuit that controls social behavior is highly conserved in vertebrates. We are searching for differences in activity patterns of the social brain network in closely related species with different degrees of association and less related species with the same type of association.

 

Hormonal bases of non-breeding territorial aggression.

Gymnotus omarorum is the only species among teleosts to display non-sex biased territorial aggression in intra and intersexual dyads. We aim to unravel its underlying mechanisma that probably depend on novel strategies non-dependent on gonadal steroids.

 

Neuromodulation of aggression.

We are working on the serotonergic and AVT systems and their roles in modulation of agonistic behavior in two species of weakly electric fish with different sociality.

 

Seasonal plasticity of the CNS.

We are searching for circadian, seasonal and sexual differences in the brain areas which control communication signals in electric fish. In particular, we have focused on changes in Glutamate receptor expression and its seasonal modulation underlying male courtship and aggressive signals.

 

Evaluation of the effect of previous experience on aggressive behavior.

We are studying the effect of experience (winner and loser effect) on the aggression of Gymnotus omarorum, an electric fish which displays inter and intrasexual aggressive behavior regardless of its reproductive status.

 

Collaborations:

Hormonal bases of non-breeding territorial aggression.

Alexis Gerschuni, CINVE, Montevideo, Uruguay

Mariana Meerhoff, CURE-UdelaR, Montevideo, Uruguay

Ana Meikle, Fac. De Veterinaria-UdelaR, Montevideo, Uruguay

Paula Pessina, Fac. De Veterinaria-UdelaR, Montevideo, Uruguay

 

Neural Basis of Social Behavior: a multidisciplinary approach

Omar Macadar, IIBCE, Montevideo, Uruguay

Milka Radmilovich, Facultad de Medicina, Montevideo, Uruguay

Felipe Sierra, IIBCE-Facultad de Ciencias, Montevideo, Uruguay

Juan Valle Lisboa, Facultad de Ciencias, Montevideo, Uruguay

 

Ethological approach to the study of agonistic behavior in Gymnotiformes

Bettina Tassino, Facultad de Ciencias, Montevideo, Uruguay

 

Serotonergic modulation of aggression in Brachyhypopomus gauderio.

Philip Stoddard, Florida International University, Miami, USA.

 

Expression of AMPA Glutamate receptors underlying the production of communication signals

Leonard Maler & Erik Harvey-Girard, University of Ottawa, Ottawa, Canada.

 

Evaluation of the role of secretoneurin in the modulation of social behavior.

Gustavo Somoza, IIB-INTECH, Chascomús, Argentina

Vance Trudeau, University of Ottawa, Ottawa, Canada.

 

Relation between stress and breeding in a natural population of Brachyhypopomus gauderio.

Philip Stoddard & Sat Gavassa, Florida International University, Miami, USA

 

Neurogenesis associated to the reproductive cycle in a natural population of Brachyhypopomus gauderio

Kent Dunlap, Trinity College, Connecticutt, USA