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

nRHa implants and temperature modulate Lambari-do-rabo-amarelo, Astyanax altiparanae (Characiformes: Characidae) induced reproduction out of the reproductive seaso

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Author(s):
Brambila-Souza, Gabriela [1] ; Mylonas, Constantinos Chrysanthos [2] ; de Mello, Paulo Henrique [1] ; Kuradomi, Rafael Yutaka [3] ; Batlouni, Sergio Ricardo [1] ; Tolussi, Carlos Eduardo [4] ; Moreira, Renata Guimaraes [5]
Total Authors: 7
Affiliation:
[1] UNESP Univ Estadual Paulista Ctr Aquicultura CAUN, Sao Paulo - Brazil
[2] Hellen Ctr Marine Res, Inst Marine Biol Biotechnol & Aquaculture, Iraklion - Greece
[3] Univ Fed Amazonas, Manaus, Amazonas - Brazil
[4] Univ Anhembi Morumbi, Sao Paulo - Brazil
[5] Univ Sao Paulo, Inst Biociencias, Sao Paulo - Brazil
Total Affiliations: 5
Document type: Journal article
Source: AQUACULTURE RESEARCH; v. 52, n. 11, p. 5595-5605, NOV 2021.
Web of Science Citations: 1
Abstract

We evaluated the effect of gonadotropin in controlled-release implant together with temperature manipulation in the reproduction of Astyanax altiparanae (lambari) during the non-breeding season. Three groups of adult females were maintained at 20 degrees C and three at 28 degrees C. For each temperature, one group was treated with 4 mu g GnRHa g(-1), other with 8 mu g GnRHa g(-1) and other was sham implanted as a control during 4 weeks. Afterwards, 4 females/experimental group were induced to spawn with human chorionic gonadotropin, while 4 females/group were injected with saline. GnRHa implants increased fsh beta and lh beta gene expression in females maintained at 28 degrees C. The vtgA gene expression increased in the high GnRHa dose at 20 degrees C, while this higher GnRHa dose associated with the higher temperature increased Gonadosomatic Index. The hCG injection increased the plasma Mature Induction Steroid levels and trigger ovulation, except in control at 28 degrees C. The control females at 20 degrees C spawned but with low reproductive performance, confirming that this is not a limiting temperature for reproduction. The administration of GnRHa as implant increased gonadotropin gene expression at 28 degrees C, temperature at which GSI also increased. Qualitatively, the implants improved reproduction at 20 degrees C, providing offspring out of the reproductive season, improving lambari production throughout the year. (AU)

FAPESP's process: 14/16320-7 - Impacts of climate/environmental change on the fauna: an integrative approach
Grantee:Carlos Arturo Navas Iannini
Support Opportunities: Research Program on Global Climate Change - Thematic Grants