A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish
Social animals with hierarchal dominance systems are particularly susceptible to their social environment. There, interactions with conspecifics and hierarchal position can greatly affect an individual's behavior, physiology and reproductive success. Our experimental model, Cichlasoma dimerus,...
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todo:paper_0018506X_v69_n_p139_Ramallo2023-10-03T14:15:39Z A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish Ramallo, M.R. Birba, A. Honji, R.M. Morandini, L. Moreira, R.G. Somoza, G.M. Pandolfi, M. 17β-Estradiol Aggression Agonistic behavior Androgens Cichlasoma dimerus Cichlids Cooperative behavior Cortisol 11 oxotestosterone estradiol hydrocortisone testosterone 11-ketotestosterone estradiol hydrocortisone testosterone adult aggression animal behavior animal cell animal experiment animal tissue Article cell composition Cichlasoma dimerus cichlid controlled study cooperation coping behavior female hormone blood level hormone determination hormone metabolism male nonhuman organism social group passive avoidance sex difference social dominance social interaction social status social structure spermatid spermatocyte spermatozoon territoriality analogs and derivatives animal blood individuality physiology reproduction social dominance social environment Aggression Aggression Agonistic Behavior Agonistic Behavior Animals Animals Cichlids Cichlids Estradiol Estradiol Female Female Hierarchy, Social Hierarchy, Social Hydrocortisone Hydrocortisone Individuality Individuality Male Male Reproduction Reproduction Social Environment Social Environment Territoriality Territoriality Testosterone Testosterone Social animals with hierarchal dominance systems are particularly susceptible to their social environment. There, interactions with conspecifics and hierarchal position can greatly affect an individual's behavior, physiology and reproductive success. Our experimental model, Cichlasoma dimerus, is a serially-monogamous Neotropical cichlid fish with a hierarchical social system, established and sustained through agonistic interactions. In this work, we aimed to describe C. dimerus social structure and its association with hormonal profiles and testicular cellular composition. We recorded and quantified agonistic interactions from the territorial pair, i.e. the top ranked male and female, and the lowest ranked male of stable social groups. Plasma levels of 11-ketotestosterone (11-KT), testosterone, 17β-estradiol (E 2 ) and cortisol were measured by ELISA. Results show that territorial pairs cooperatively guarded the territory, but rarely attacked in synchrony. Territorial males had higher testosterone and 11-KT plasma levels than non-territorial males, while E 2 and an index of its metabolization from testosterone were higher in non-territorial males. No difference was observed in cortisol levels. Plasma 11-KT and an index of the conversion of testosterone to 11-KT, positively correlated with the frequency of aggressiveness, while E 2 showed the opposite pattern. Territorial males had a higher gonadosomatic index than non-territorial males. The quantification of testicular cellular types revealed that the percentage of spermatocytes and spermatids was higher in non-territorial males, while territorial males showed a greater percentage of spermatozoa. Thus, C. dimerus male social position within a stable hierarchy is associated with distinct behaviors, steroid levels and testicular degree of development. © 2015 Elsevier Inc. Fil:Ramallo, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Somoza, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pandolfi, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_0018506X_v69_n_p139_Ramallo |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
17β-Estradiol Aggression Agonistic behavior Androgens Cichlasoma dimerus Cichlids Cooperative behavior Cortisol 11 oxotestosterone estradiol hydrocortisone testosterone 11-ketotestosterone estradiol hydrocortisone testosterone adult aggression animal behavior animal cell animal experiment animal tissue Article cell composition Cichlasoma dimerus cichlid controlled study cooperation coping behavior female hormone blood level hormone determination hormone metabolism male nonhuman organism social group passive avoidance sex difference social dominance social interaction social status social structure spermatid spermatocyte spermatozoon territoriality analogs and derivatives animal blood individuality physiology reproduction social dominance social environment Aggression Aggression Agonistic Behavior Agonistic Behavior Animals Animals Cichlids Cichlids Estradiol Estradiol Female Female Hierarchy, Social Hierarchy, Social Hydrocortisone Hydrocortisone Individuality Individuality Male Male Reproduction Reproduction Social Environment Social Environment Territoriality Territoriality Testosterone Testosterone |
| spellingShingle |
17β-Estradiol Aggression Agonistic behavior Androgens Cichlasoma dimerus Cichlids Cooperative behavior Cortisol 11 oxotestosterone estradiol hydrocortisone testosterone 11-ketotestosterone estradiol hydrocortisone testosterone adult aggression animal behavior animal cell animal experiment animal tissue Article cell composition Cichlasoma dimerus cichlid controlled study cooperation coping behavior female hormone blood level hormone determination hormone metabolism male nonhuman organism social group passive avoidance sex difference social dominance social interaction social status social structure spermatid spermatocyte spermatozoon territoriality analogs and derivatives animal blood individuality physiology reproduction social dominance social environment Aggression Aggression Agonistic Behavior Agonistic Behavior Animals Animals Cichlids Cichlids Estradiol Estradiol Female Female Hierarchy, Social Hierarchy, Social Hydrocortisone Hydrocortisone Individuality Individuality Male Male Reproduction Reproduction Social Environment Social Environment Territoriality Territoriality Testosterone Testosterone Ramallo, M.R. Birba, A. Honji, R.M. Morandini, L. Moreira, R.G. Somoza, G.M. Pandolfi, M. A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| topic_facet |
17β-Estradiol Aggression Agonistic behavior Androgens Cichlasoma dimerus Cichlids Cooperative behavior Cortisol 11 oxotestosterone estradiol hydrocortisone testosterone 11-ketotestosterone estradiol hydrocortisone testosterone adult aggression animal behavior animal cell animal experiment animal tissue Article cell composition Cichlasoma dimerus cichlid controlled study cooperation coping behavior female hormone blood level hormone determination hormone metabolism male nonhuman organism social group passive avoidance sex difference social dominance social interaction social status social structure spermatid spermatocyte spermatozoon territoriality analogs and derivatives animal blood individuality physiology reproduction social dominance social environment Aggression Aggression Agonistic Behavior Agonistic Behavior Animals Animals Cichlids Cichlids Estradiol Estradiol Female Female Hierarchy, Social Hierarchy, Social Hydrocortisone Hydrocortisone Individuality Individuality Male Male Reproduction Reproduction Social Environment Social Environment Territoriality Territoriality Testosterone Testosterone |
| description |
Social animals with hierarchal dominance systems are particularly susceptible to their social environment. There, interactions with conspecifics and hierarchal position can greatly affect an individual's behavior, physiology and reproductive success. Our experimental model, Cichlasoma dimerus, is a serially-monogamous Neotropical cichlid fish with a hierarchical social system, established and sustained through agonistic interactions. In this work, we aimed to describe C. dimerus social structure and its association with hormonal profiles and testicular cellular composition. We recorded and quantified agonistic interactions from the territorial pair, i.e. the top ranked male and female, and the lowest ranked male of stable social groups. Plasma levels of 11-ketotestosterone (11-KT), testosterone, 17β-estradiol (E 2 ) and cortisol were measured by ELISA. Results show that territorial pairs cooperatively guarded the territory, but rarely attacked in synchrony. Territorial males had higher testosterone and 11-KT plasma levels than non-territorial males, while E 2 and an index of its metabolization from testosterone were higher in non-territorial males. No difference was observed in cortisol levels. Plasma 11-KT and an index of the conversion of testosterone to 11-KT, positively correlated with the frequency of aggressiveness, while E 2 showed the opposite pattern. Territorial males had a higher gonadosomatic index than non-territorial males. The quantification of testicular cellular types revealed that the percentage of spermatocytes and spermatids was higher in non-territorial males, while territorial males showed a greater percentage of spermatozoa. Thus, C. dimerus male social position within a stable hierarchy is associated with distinct behaviors, steroid levels and testicular degree of development. © 2015 Elsevier Inc. |
| format |
JOUR |
| author |
Ramallo, M.R. Birba, A. Honji, R.M. Morandini, L. Moreira, R.G. Somoza, G.M. Pandolfi, M. |
| author_facet |
Ramallo, M.R. Birba, A. Honji, R.M. Morandini, L. Moreira, R.G. Somoza, G.M. Pandolfi, M. |
| author_sort |
Ramallo, M.R. |
| title |
A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| title_short |
A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| title_full |
A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| title_fullStr |
A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| title_full_unstemmed |
A multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a Neotropical cichlid fish |
| title_sort |
multidisciplinary study on social status and the relationship between inter-individual variation in hormone levels and agonistic behavior in a neotropical cichlid fish |
| url |
http://hdl.handle.net/20.500.12110/paper_0018506X_v69_n_p139_Ramallo |
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