Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Show less -
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]
Total Authors: 11
[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
Total Affiliations: 4
Document type: Journal article
Source: AQUACULTURE RESEARCH; v. 50, n. 11 AUG 2019.
Web of Science Citations: 0

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)

FAPESP's process: 10/51271-6 - Mapará and Amazon River prawn farming in multispace and multitrophic systems
Grantee:Sergio Ricardo Batlouni
Support Opportunities: Research Grants - Research Partnership for Technological Innovation - PITE