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Published VersionCC BY-NC V4.0, Open Access
Journal article
Hormonal profiles and reproductive development of hatchery-reared first filial (F1) generation silver trevally (Pseudocaranx georgianus, Carangidae)
Aquaculture Reports, Vol.46, pp.1-11
2026
Abstract
We examined the annual (maiden) reproductive cycle of hatchery-reared first filial (F1) generation silver trevally (Pseudocaranx georgianus) by tracking ovarian development and plasma levels of follicle-stimulating hormone (Fsh), luteinizing hormone (Lh), and estradiol-17β (E2). Our aims were to determine the age at puberty, identify reproductive dysfunctions, and lay the groundwork for manipulating the spawning season. To achieve this, mixed-sex two-year-old fish (n = 424) were maintained in a 13-m
tank under ambient conditions. Baseline samples were collected in April 2018, followed by near-monthly sampling (every 4–6 weeks) from July 2018 to April 2019. Puberty occurred at 3 years of age. Fish showed distinct seasonality in their reproductive cycle, with a clear peak in activity during the months of November to December (late spring/early summer). Reproductive development in females was limited, with only 2.7 % out of 113 females sampled achieving late vitellogenesis, and no instances of oocyte maturation or spontaneous spawning were observed. Contrary to increasing plasma E2 content as oogenesis progressed, plasma concentrations of Lh and Fsh remained relatively stable across oogenesis stages. The lack of increased plasma Lh suggests that reproductive dysfunction (absence of spontaneous spawning) may be due to insufficient quantities of Lh being released into the bloodstream to accomplish oocyte maturation, ovulation and spawning.
Details
- Title
- Hormonal profiles and reproductive development of hatchery-reared first filial (F1) generation silver trevally (Pseudocaranx georgianus, Carangidae)
- Authors
- Matthew J. Wylie (Corresponding Author) - Bioeconomy Science InstituteIgor Ruza - Bioeconomy Science InstituteRia Rebstock - Bioeconomy Science InstituteNicola Shaw - Bioeconomy Science InstituteLachlan P. Dennis - University of the Sunshine Coast, Queensland, Centre for BioinnovationP. Mark Lokman - Department of Zoology, University of Otago, Dunedin, New ZealandJosephine Nocillado - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringAbigail Elizur - University of the Sunshine Coast, Queensland, Centre for BioinnovationKeitaro Kato - Kindai UniversityMaren Wellenreuther - University of Auckland
- Publication details
- Aquaculture Reports, Vol.46, pp.1-11
- Publisher
- Elsevier BV
- Date published
- 2026
- DOI
- 10.1016/j.aqrep.2025.103303
- ISSN
- 2352-5134
- Copyright note
- © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/bync/4.0/).
- Data Availability
- Data will be made available on request.
- Grant note
- Funding was received from the Royal Society Te Apārangi Catalyst Seeding General contract CSG-PAF1803 “Enabling breeding of indigenous aquaculture species by overcoming reproductive dysfunctions” to MW and MJW. The research was funded through the New Zealand Ministry for Business Innovation and Employment Endeavour Programme “Accelerated breeding for enhanced seafood production” (#C11X1603) to MW.
- Organisation Unit
- School of Science, Technology and Engineering; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 991192343002621
- Output Type
- Journal article
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