Birba, A.; Ramallo, M.R.; Lo Nostro, F.; Guimarães Moreira, R.; Pandolfi, M. "Reproductive and parental care physiology of Cichlasoma dimerus males" (2015) General and Comparative Endocrinology. 221:193-200
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The South American cichlid fish Cichlasoma dimerus presents a high breeding frequency and biparental care of the eggs and larvae. The male parental care period was divided in four different phases according to the developmental degree of the offspring: pre-spawning activity (MP, day 0), guarding eggs (ME, one day after fertilization (1 DAF)), guarding hatched larvae (MHL, 3 DAF), and guarding swimming larvae (MSL, 8 DAF). The aim of this study was to characterize male reproductive physiology by measuring steroid hormone plasma levels and analyzing testes cellular composition. Males exhibiting pre-spawning activity showed 8.4 times higher 11-ketotestosterone and 5.63 times higher testosterone levels than MHL. No differences were observed in estradiol and cortisol levels among the different phases. The cellular composition of the testes varied during the reproductive and parental care periods. Testes of MP were composed of 50% of spermatozoa, whereas spermatogonia type B and spermatocytes were predominant in the subsequent parental phases. A morphometric analysis of Leydig cells nuclear area revealed that MP and ME's Leydig cells averaged 1.27 times larger than that those of MHL and MSL and was positively correlated with circulating 11-KT and T levels. Hence, C. dimerus males showed important changes in its hormonal profiles and testicular cellular composition throughout the reproductive and parental care period. © 2015 Elsevier Inc.


Documento: Artículo
Título:Reproductive and parental care physiology of Cichlasoma dimerus males
Autor:Birba, A.; Ramallo, M.R.; Lo Nostro, F.; Guimarães Moreira, R.; Pandolfi, M.
Filiación:Laboratorio de Neuroendocrinología y Comportamiento, DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (C1428EHA), Buenos Aires, Argentina
IBBEA-CONICET-UBA, Ciudad Universitaria (C1428EHA), Buenos Aires, Argentina
Laboratorio de Ecotoxicología Acuática, DBBE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (C1428EHA), Buenos Aires, Argentina
Departamento de Fisiologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão, Traversa 14, 321, São Paulo, SP, 05508-090, Brazil
Palabras clave:Cichlids; Leydig cells; Parental care; Sexual steroids; Spermatogenesis; 11 oxotestosterone; estradiol; hydrocortisone; testosterone; androgen; adult; animal cell; animal experiment; Article; cell composition; Cichlasoma dimerus; cichlid; controlled study; female; fertilization; histology; larva; Leydig cell; male; male animal; morphometrics; nonhuman; parental behavior; priority journal; qualitative analysis; quantitative analysis; reproductive behavior; spawning; spermatogonium; spermatozoon; steroid blood level; animal; animal behavior; cichlid; cytology; growth, development and aging; human; metabolism; physiology; reproduction; spermatogenesis; testis; Androgens; Animals; Behavior, Animal; Cichlids; Fertilization; Humans; Larva; Leydig Cells; Male; Reproduction; Reproductive Physiological Processes; Spermatogenesis; Testis
Página de inicio:193
Página de fin:200
Título revista:General and Comparative Endocrinology
Título revista abreviado:Gen. Comp. Endocrinol.
CAS:11 oxotestosterone, 564-35-2; estradiol, 50-28-2; hydrocortisone, 50-23-7; testosterone, 58-22-0; Androgens


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---------- APA ----------
Birba, A., Ramallo, M.R., Lo Nostro, F., Guimarães Moreira, R. & Pandolfi, M. (2015) . Reproductive and parental care physiology of Cichlasoma dimerus males. General and Comparative Endocrinology, 221, 193-200.
---------- CHICAGO ----------
Birba, A., Ramallo, M.R., Lo Nostro, F., Guimarães Moreira, R., Pandolfi, M. "Reproductive and parental care physiology of Cichlasoma dimerus males" . General and Comparative Endocrinology 221 (2015) : 193-200.
---------- MLA ----------
Birba, A., Ramallo, M.R., Lo Nostro, F., Guimarães Moreira, R., Pandolfi, M. "Reproductive and parental care physiology of Cichlasoma dimerus males" . General and Comparative Endocrinology, vol. 221, 2015, pp. 193-200.
---------- VANCOUVER ----------
Birba, A., Ramallo, M.R., Lo Nostro, F., Guimarães Moreira, R., Pandolfi, M. Reproductive and parental care physiology of Cichlasoma dimerus males. Gen. Comp. Endocrinol. 2015;221:193-200.