Dissertation
Reproductive Biology and Controlled Reproductive Development of Captive Cobia (Rachycentron canadum)
University of the Sunshine Coast, Queensland
Doctor of Philosophy, University of the Sunshine Coast
2016
DOI:
https://doi.org/10.25907/00638
Abstract
Cobia aquaculture began in Australia in 2007; however, expansion of commercial production has been limited, due in part to low and inconsistent supply of seed stock for on-growing. This study aimed to address the constraints of reproductive performance of cobia in captive conditions and investigate strategies to improve the efficiencies of broodstock management in commercial and research facilities. In a study evaluating the growth of three cohorts of captive reared cobia, to determine the existence and extent of sexually dimorphic growth, intersex development in cobia was identified and recorded for the first time. There was no sexually dimorphic growth in the first two cohorts of fish. In contrast, females from third cohort were significantly larger than males once mean body weight exceeded 2 kg. It is proposed that the observed variations in growth and gonad malformations observed in cohorts 1 and 2 were the result of exposure to endocrine disruptors, the type and source of which remains unknown.
Details
- Title
- Reproductive Biology and Controlled Reproductive Development of Captive Cobia (Rachycentron canadum)
- Authors
- Luke Dutney
- Contributors
- Abigail Elizur (Supervisor)
- Awarding institution
- University of the Sunshine Coast
- Degree awarded
- Doctor of Philosophy
- Publisher
- University of the Sunshine Coast, Queensland
- DOI
- 10.25907/00638
- Organisation Unit
- School of Education - Legacy; University of the Sunshine Coast, Queensland; Centre for Bioinnovation
- Language
- English
- Record Identifier
- 99450520302621
- Output Type
- Dissertation
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