Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus
The South American cichlid fish Cichlasoma dimerus is a freshwater species that presents social hierarchies, a highly organized breeding activity, biparental care and a high frequency of spawning. Spawning is followed by a period of parental care (about 20. days in aquaria conditions) during which t...
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todo:paper_00319384_v106_n2_p193_Tubert2023-10-03T14:43:41Z Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus Tubert, C. Lo Nostro, F. Villafañe, V. Pandolfi, M. Cichlids GnRH Neuroendocrinology Pituitary Reproduction Steroids androgen estradiol gonadorelin aggression androgen blood level animal experiment animal tissue article Cichlasoma dimerus cichlid estradiol blood level female hypothalamus hypophysis system nerve cell nonhuman optical density priority journal reproduction sexual behavior spawning Aggression Animals Brain Cichlids Estradiol Female Follicle Stimulating Hormone, beta Subunit Gonadotropin-Releasing Hormone Hydrocortisone Luteinizing Hormone, beta Subunit Male Neurons Ovary Pituitary Gland Pyrrolidonecarboxylic Acid Reproductive Physiological Processes Testosterone The South American cichlid fish Cichlasoma dimerus is a freshwater species that presents social hierarchies, a highly organized breeding activity, biparental care and a high frequency of spawning. Spawning is followed by a period of parental care (about 20. days in aquaria conditions) during which the cooperative pair takes care of the eggs, both by fanning them and by removing dead ones. The different spawning events in the reproductive period were classified as female reproductive stages which can be subdivided in four phases, according to their offspring degree of development: (1) female with prespawning activity (day 0), (2) female with eggs (day 1 after fertilization), (3) female with hatched larvae (day 3 after fertilization) and (4) female with swimming larvae (FSL, day 8 after fertilization). In Perciform species gonadotropin-releasing hormone type-3 (GnRH3) neurons are associated with the olfactory bulbs acting as a potent neuromodulator of reproductive behaviors in males. The aim of this study is to characterize the GnRH3 neuronal system in females of C. dimerus in relation with aggressive behavior and reproductive physiology during different phases of the reproductive period. Females with prespawning activity were the most aggressive ones showing GnRH-3 neurons with bigger nuclear and somatic area and higher optical density than the others. They also presented the highest levels of plasma androgen and estradiol and maximum gonadosomatic indexes. These results provide information about the regulation and functioning of hypothalamus-pituitary-gonads axis during reproduction in a species with highly organized breeding activity. © 2012 Elsevier Inc. Fil:Tubert, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Lo Nostro, F. 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_00319384_v106_n2_p193_Tubert |
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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 |
Cichlids GnRH Neuroendocrinology Pituitary Reproduction Steroids androgen estradiol gonadorelin aggression androgen blood level animal experiment animal tissue article Cichlasoma dimerus cichlid estradiol blood level female hypothalamus hypophysis system nerve cell nonhuman optical density priority journal reproduction sexual behavior spawning Aggression Animals Brain Cichlids Estradiol Female Follicle Stimulating Hormone, beta Subunit Gonadotropin-Releasing Hormone Hydrocortisone Luteinizing Hormone, beta Subunit Male Neurons Ovary Pituitary Gland Pyrrolidonecarboxylic Acid Reproductive Physiological Processes Testosterone |
| spellingShingle |
Cichlids GnRH Neuroendocrinology Pituitary Reproduction Steroids androgen estradiol gonadorelin aggression androgen blood level animal experiment animal tissue article Cichlasoma dimerus cichlid estradiol blood level female hypothalamus hypophysis system nerve cell nonhuman optical density priority journal reproduction sexual behavior spawning Aggression Animals Brain Cichlids Estradiol Female Follicle Stimulating Hormone, beta Subunit Gonadotropin-Releasing Hormone Hydrocortisone Luteinizing Hormone, beta Subunit Male Neurons Ovary Pituitary Gland Pyrrolidonecarboxylic Acid Reproductive Physiological Processes Testosterone Tubert, C. Lo Nostro, F. Villafañe, V. Pandolfi, M. Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| topic_facet |
Cichlids GnRH Neuroendocrinology Pituitary Reproduction Steroids androgen estradiol gonadorelin aggression androgen blood level animal experiment animal tissue article Cichlasoma dimerus cichlid estradiol blood level female hypothalamus hypophysis system nerve cell nonhuman optical density priority journal reproduction sexual behavior spawning Aggression Animals Brain Cichlids Estradiol Female Follicle Stimulating Hormone, beta Subunit Gonadotropin-Releasing Hormone Hydrocortisone Luteinizing Hormone, beta Subunit Male Neurons Ovary Pituitary Gland Pyrrolidonecarboxylic Acid Reproductive Physiological Processes Testosterone |
| description |
The South American cichlid fish Cichlasoma dimerus is a freshwater species that presents social hierarchies, a highly organized breeding activity, biparental care and a high frequency of spawning. Spawning is followed by a period of parental care (about 20. days in aquaria conditions) during which the cooperative pair takes care of the eggs, both by fanning them and by removing dead ones. The different spawning events in the reproductive period were classified as female reproductive stages which can be subdivided in four phases, according to their offspring degree of development: (1) female with prespawning activity (day 0), (2) female with eggs (day 1 after fertilization), (3) female with hatched larvae (day 3 after fertilization) and (4) female with swimming larvae (FSL, day 8 after fertilization). In Perciform species gonadotropin-releasing hormone type-3 (GnRH3) neurons are associated with the olfactory bulbs acting as a potent neuromodulator of reproductive behaviors in males. The aim of this study is to characterize the GnRH3 neuronal system in females of C. dimerus in relation with aggressive behavior and reproductive physiology during different phases of the reproductive period. Females with prespawning activity were the most aggressive ones showing GnRH-3 neurons with bigger nuclear and somatic area and higher optical density than the others. They also presented the highest levels of plasma androgen and estradiol and maximum gonadosomatic indexes. These results provide information about the regulation and functioning of hypothalamus-pituitary-gonads axis during reproduction in a species with highly organized breeding activity. © 2012 Elsevier Inc. |
| format |
JOUR |
| author |
Tubert, C. Lo Nostro, F. Villafañe, V. Pandolfi, M. |
| author_facet |
Tubert, C. Lo Nostro, F. Villafañe, V. Pandolfi, M. |
| author_sort |
Tubert, C. |
| title |
Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| title_short |
Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| title_full |
Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| title_fullStr |
Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| title_full_unstemmed |
Aggressive behavior and reproductive physiology in females of the social cichlid fish Cichlasoma dimerus |
| title_sort |
aggressive behavior and reproductive physiology in females of the social cichlid fish cichlasoma dimerus |
| url |
http://hdl.handle.net/20.500.12110/paper_00319384_v106_n2_p193_Tubert |
| work_keys_str_mv |
AT tubertc aggressivebehaviorandreproductivephysiologyinfemalesofthesocialcichlidfishcichlasomadimerus AT lonostrof aggressivebehaviorandreproductivephysiologyinfemalesofthesocialcichlidfishcichlasomadimerus AT villafanev aggressivebehaviorandreproductivephysiologyinfemalesofthesocialcichlidfishcichlasomadimerus AT pandolfim aggressivebehaviorandreproductivephysiologyinfemalesofthesocialcichlidfishcichlasomadimerus |
| _version_ |
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