Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine
In a previous work we found that size-matched Chasmagnathus crabs establish winner-loser relationships that were stable over successive encounters but no evidence of escalation was revealed through fights. Here, we evaluated the hypothesis that size-matched fights between these crabs would be resolv...
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2010
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v101_n4_p438_Pedetta http://hdl.handle.net/20.500.12110/paper_00319384_v101_n4_p438_Pedetta |
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paper:paper_00319384_v101_n4_p438_Pedetta2023-06-08T14:59:01Z Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine Pedetta, Silvia Kaczer, Laura Aggressiveness Crab Fight Octopamine Serotonin biogenic amine octopamine serotonin aggression aggressiveness animal experiment article Chasmagnathus crab dominance behavior dynamics experimental study fighting male nonhuman priority journal Aggression Animals Behavior, Animal Brachyura Dominance-Subordination Male Octopamine Serotonin In a previous work we found that size-matched Chasmagnathus crabs establish winner-loser relationships that were stable over successive encounters but no evidence of escalation was revealed through fights. Here, we evaluated the hypothesis that size-matched fights between these crabs would be resolved according to the contestants' level of aggressiveness. Moreover, we aim at analysing the proximate roots of aggression, addressing the influence of the biogenic amines serotonin (5HT) and octopamine (OA) in crab's agonistic behaviour. To achieve these purposes, the following experiments were carried out. First, we performed successive fight encounters between the same opponents, varying the number of encounters and the interval between them, to assess the stability and progression of the winner-loser relationship. Then, we analysed dominance relationships in groups of three crabs, evaluating the emergence of linearity. Thirdly, we examined the effects of 5HT and OA injections over the fight dynamics and its result. Our findings show that contest outcome is persistent even through four encounters separated by 24. h, but a comparison between encounters does not reveal any saving in fight time or increase in the opponent disparity. Within a group of crabs, a rank-order of dominance is revealed which is reflected in their fight dynamics. Interestingly, these results would not be due to winner or loser effects, suggesting that fight outcome could be mainly explained as resulting from differences in the level of aggressiveness of each opponent. Moreover, this individual aggressiveness can be modulated in opposite directions by the biogenic amines 5HT and OA, being increased by 5HT and decreased by OA. © 2010 Elsevier Inc. Fil:Pedetta, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Kaczer, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v101_n4_p438_Pedetta http://hdl.handle.net/20.500.12110/paper_00319384_v101_n4_p438_Pedetta |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Aggressiveness Crab Fight Octopamine Serotonin biogenic amine octopamine serotonin aggression aggressiveness animal experiment article Chasmagnathus crab dominance behavior dynamics experimental study fighting male nonhuman priority journal Aggression Animals Behavior, Animal Brachyura Dominance-Subordination Male Octopamine Serotonin |
| spellingShingle |
Aggressiveness Crab Fight Octopamine Serotonin biogenic amine octopamine serotonin aggression aggressiveness animal experiment article Chasmagnathus crab dominance behavior dynamics experimental study fighting male nonhuman priority journal Aggression Animals Behavior, Animal Brachyura Dominance-Subordination Male Octopamine Serotonin Pedetta, Silvia Kaczer, Laura Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| topic_facet |
Aggressiveness Crab Fight Octopamine Serotonin biogenic amine octopamine serotonin aggression aggressiveness animal experiment article Chasmagnathus crab dominance behavior dynamics experimental study fighting male nonhuman priority journal Aggression Animals Behavior, Animal Brachyura Dominance-Subordination Male Octopamine Serotonin |
| description |
In a previous work we found that size-matched Chasmagnathus crabs establish winner-loser relationships that were stable over successive encounters but no evidence of escalation was revealed through fights. Here, we evaluated the hypothesis that size-matched fights between these crabs would be resolved according to the contestants' level of aggressiveness. Moreover, we aim at analysing the proximate roots of aggression, addressing the influence of the biogenic amines serotonin (5HT) and octopamine (OA) in crab's agonistic behaviour. To achieve these purposes, the following experiments were carried out. First, we performed successive fight encounters between the same opponents, varying the number of encounters and the interval between them, to assess the stability and progression of the winner-loser relationship. Then, we analysed dominance relationships in groups of three crabs, evaluating the emergence of linearity. Thirdly, we examined the effects of 5HT and OA injections over the fight dynamics and its result. Our findings show that contest outcome is persistent even through four encounters separated by 24. h, but a comparison between encounters does not reveal any saving in fight time or increase in the opponent disparity. Within a group of crabs, a rank-order of dominance is revealed which is reflected in their fight dynamics. Interestingly, these results would not be due to winner or loser effects, suggesting that fight outcome could be mainly explained as resulting from differences in the level of aggressiveness of each opponent. Moreover, this individual aggressiveness can be modulated in opposite directions by the biogenic amines 5HT and OA, being increased by 5HT and decreased by OA. © 2010 Elsevier Inc. |
| author |
Pedetta, Silvia Kaczer, Laura |
| author_facet |
Pedetta, Silvia Kaczer, Laura |
| author_sort |
Pedetta, Silvia |
| title |
Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| title_short |
Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| title_full |
Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| title_fullStr |
Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| title_full_unstemmed |
Individual aggressiveness in the crab Chasmagnathus: Influence in fight outcome and modulation by serotonin and octopamine |
| title_sort |
individual aggressiveness in the crab chasmagnathus: influence in fight outcome and modulation by serotonin and octopamine |
| publishDate |
2010 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319384_v101_n4_p438_Pedetta http://hdl.handle.net/20.500.12110/paper_00319384_v101_n4_p438_Pedetta |
| work_keys_str_mv |
AT pedettasilvia individualaggressivenessinthecrabchasmagnathusinfluenceinfightoutcomeandmodulationbyserotoninandoctopamine AT kaczerlaura individualaggressivenessinthecrabchasmagnathusinfluenceinfightoutcomeandmodulationbyserotoninandoctopamine |
| _version_ |
1768545273343115264 |