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| Alcantara,Mariana B.; Lima,Leôncio P.; Bastos,Rogério P.. |
| From January, 1997 to April, 1998, we studied breeding activity in a population of Scinax centralis Pombal & Bastos, 1996, in the state of Goiás, inside the Cerrado Biome, Brazil. The behavior of males and females in the choruses, the relationships between environmental variables and the presence of individuals, the spatial distribution pattern, amplexus and clutches were analyzed. The breeding season occurred from November to May. The majority of males began to call when they entered the chorus; they were defending their calling sites against other males. We found a positive correlation between the number of females and males in the choruses, but no significant correlation was observed between the operational sexual ratio (OSR, number of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scinax centralis; Spatial distribution; Breeding; Aggressive behavior; Central Brazil. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000400008 |
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| Aguilera-Olivares,Daniel; Rizo,José F; Burgos-Lefimil,Camila; Flores-Prado,Luis; Niemeyer,Hermann M. |
| BACKGROUND: In one-piece nesting termites, which nest and forage in a single piece of wood, soldier production increases during the swarming period, i.e. when the risk of invasion of their substrate and hence of their colony by dealates in search of a nesting substrate increases. In Neotermes chilensis, a one-piece nesting termite endemic to Chile, we hypothesized: i) that during swarming soldiers would defend their colony by showing higher aggressiveness toward non-nestmate than toward nestmate dealates, ii) that aggressiveness would negatively correlate with genetic relatedness of interacting soldier/dealate pairs and iii) that nestmate recognition would be based on differences in cues provided by cuticular compounds (CC) between nestmates and... |
| Tipo: Journal article |
Palavras-chave: Chemical communication; Neotermes chilensis; Kin recognition; Cuticular compounds; Aggressive behavior; Genetic relatedness. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2016000100011 |
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| Fachinelli,C.; Ahumada,M.; Fachinellizz,J.M.; Torrecilla,M.; Rodríguez-Echandía,E.L.. |
| Valproate and carbamazepine (CAR) have been proposed as adjunct alternatives for the control of aggression in psychiatric patients, although no definite conclusions have been reached. We examined the effects of these drugs on food competition offensive aggression and other behaviors in high- and low-aggression food-restricted pigeons. These were divided into pairs containing previously ranked high-aggression (N = 10 pairs) and low-aggression females (N = 10 pairs). In Experiment 1, a pigeon in each pair of high- and low-aggression subjects was treated daily with an oral dose of sodium valproate (50 mg kg-1 mL saline-1) for 15 days. The other animal received the vehicle. On days 1, 7, and 15, food competition trials (10 min) were performed 60 min after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Valproate; Carbamazepine; Aggressive behavior; Food competition; Pigeons. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600015 |
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