Seasonal morphophysiological changes during the reproductive cycle of the tripletail fish Lobotes surinamensis (Perciformes: Lobotidae) in the western South Atlantic

Autor(es)

Fagundes, Kaina Rocha Cabrera ^[1] ; Honji, Renato Massaaki ^[2] ; Escalante-Rojas, Maria Carmen ^[1] ; Garcia, Carlos Eduardo de Oliveira ^[1] ; Moreira, Renata Guimaraes ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Biociencias, Dept Fisiol, Lab Metab & Reprod Organismos Aquat LAMEROA, Rua Matao, Trav 14, 321, BR-05508090 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Ctr Biol Marinha, CEBIMar, Rodovia Manoel Hipolito do Rego, Km 131, 5, BR-11612109 Sao Sebastiao, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL BIOLOGY OF FISHES; v. 104, n. 7, p. 779-796, JUL 2021.
• Citações Web of Science: 0

Resumo

The tripletail Lobotes surinamensis inhabits tropical and subtropical oceans, including the South Atlantic, where information about its reproductive biology is scarce. We combined physiological and morphological tools to study the reproductive cycle of L. surinamensis in the western South Atlantic. Adult females and males were sampled in Paraty Bay (Rio de Janeiro, southeastern Brazil) for 2 years, and the animals were grouped into three seasons: spring, summer, and autumn/winter. Gonadal morphology, plasma levels of gonadal steroids, 17 beta-estradiol (E-2), 11-ketotestosterone (11-KT), and 17 alpha-hydroxyprogesterone (17 alpha-OHP) were quantified in females, and testosterone (T) and 11-KT were quantified in males. The gene expression of the beta subunit of pituitary gonadotropins, luteinizing hormone (LH), and follicle-stimulating hormone (FSH) were evaluated in all seasons. The histological analysis of the gonads showed that L. surinamensis is a multiple spawner with an asynchronous oocyte development. The gene expression of fsh beta did not change throughout the reproductive cycle in males and females, while the gene expression of lh beta in males was higher in the summer compared to the autumn/winter periods. Plasma E-2 was higher in females and 11-KT in males during spring. Gonadal development, plasma level of E-2 (females), and 11-KT (males) are indicators that L. surinamensis reproduce during the spring and summer in Paraty Bay, while the gene expression levels of gonadotropins in females and fsh beta in males were not useful physiological tools to establish the reproductive season. The results suggest an active expression throughout the year, a profile expected in multiple spawning species, as proposed here for the L. surinamensis. (AU)

• Processo FAPESP: 14/16320-7 - Impactos das mudanças climáticas e ambientais sobre a fauna: uma abordagem integrativa
• Beneficiário: Carlos Arturo Navas Iannini
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 17/10971-4 - Caracterização morfofisiológica do ciclo reprodutivo da prejereba (Lobotes surinamensis) (Perciformes: Lobotidae) em ambiente natural
• Beneficiário: Kainã Rocha Cabrera Fagundes
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/06765-0 - Fisiologia reprodutiva da Garoupa-Verdadeira Epinephelus marginatus (Perciformes: Serranidae) em cativeiro: terapias hormonais aplicadas à indução da maturação sexual na fase pré-desova
• Beneficiário: Renato Massaaki Honji
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores