Reproductive cycle of the Amazonian planktivorous catfish Hypophthalmus marginatus (Siluriformes, Pimelodidae)

Autor(es):Mostrar menos -

Hainfellner, Patrick ^[1] ; Kuradomi, Rafael Yutaka ^{[1, 2]} ; de Souza, Thiago Goncalves ^[1] ; Sato, Rafael Tomoda ^[1] ; Figueiredo-Ariki, Daniel Guimaraes ^[1] ; de Freitas, Guilherme Antonio ^[1] ; Queiroz, Luciano ^[3] ; Valenti, Wagner C. ^[1] ; Valenti, Patricia Moraes ^[1] ; Ge, Wei ^[4] ; Batlouni, Sergio Ricardo ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Aquaculture Ctr Sao Paulo State Univ CAUNESP, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

^[2] Univ Nilton Lins, Grad Programe Aquaculture, Manaus, Amazonas - Brazil

^[3] Fed Inst Educ Sci & Technol Para, Campus Tucurui, Tucurui, Para - Brazil

^[4] Univ Macau, Ctr Reprod, Fac Hlth Sci, Dev & Aging CRDA, Taipa, Macao - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: AQUACULTURE RESEARCH; v. 50, n. 11 AUG 2019.
• Citações Web of Science: 0

Resumo

We evaluated the annual process of oocyte and ovarian development of the planktivorous Amazonian catfish, the mapara (Hypophthalmus marginatus), aiming to support captive reproduction for domestication. A total of 149 females were captured from the Tocantins River at the Tucurui Dam (3 degrees 49'55{''}S, 49 degrees 39'9{''}W) in 13 sampling events. For each individual, we evaluated ovary histology and plasma steroid concentrations. Two annual reproductive cycles, with similar characteristics, including a long period of rest, a short vitellogenic stage and a well-defined spawning season from November to March, were described. A 17 beta-estradiol (E-2) rise and a 17 alpha,20 beta-dihydroxy-4-pregnen-3-one (DHP) peak were associated with vitellogenesis and spawning season, respectively, in the first cycle but not in the second reproductive cycle. In conclusion, the studied species presents a reproductive cycle similar to that of other migratory total spawners; however, unusually for this group of fish, there were three (but not two) batches of vitellogenic oocytes in ``in maturation{''} and ``mature{''} stage ovaries, pointing to the possibility of more than one spawn during the spawning season. (AU)

• Processo FAPESP: 10/51271-6 - Cultivo do mapará e do camarão-da-Amazônia em sistemas multiespaciais e multitróficos
• Beneficiário: Sergio Ricardo Batlouni
• Modalidade de apoio: Auxílio à Pesquisa - Parceria para Inovação Tecnológica - PITE