Masculinization of Banggai Cardinalfish (&lt;i&gt;Pterapogon kauderni&lt;/i&gt;) using 17α-Methyltestosterone-enriched &lt;i&gt;Artemia&lt;/i&gt; sp.

Muhammad Safir,Madinawati Madinawati,Zainab Zainab,Desiana Trisnawati Tobigo,Seftina F Mangitung

doi:10.20884/1.oa.2020.16.2.809

Masculinization of Banggai Cardinalfish (<i>Pterapogon kauderni</i>) using 17α-Methyltestosterone-enriched <i>Artemia</i> sp.

Muhammad Safir, Madinawati Madinawati + Show 3 more

Open Access

https://doi.org/10.20884/1.oa.2020.16.2.809

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Journal: Omni-Akuatika	Publication Date: Dec 31, 2020
Citations: 1	License type: CC BY 4.0

Affiliation: Tadulako University

Abstract

Banggai Cardinalfish (Pterapogon kauderni) is one of the endemic fish from the waters of the Banggai Islands, Central Sulawesi Province. One factor challenging the production of P. kauderni larvae is the male fish will nurture the eggs and larvae for 30 days, hindering next spawning cycle. One effort to overcome this problem an increase of male fish number should be performed, for example through sex reversal. This study aimed to determine the effectiveness of the hormone 17α-methyltestosterone (17α-MT) through Artemia sp. to increase male sex percentage P. kauderni. This study used a completely randomized design by testing four treatments namely feeding Artemia sp. which has been soaked with 2.0 mg of the 17α-MT hormone for two- hours given to P. kauderni larvae for 10 days (A); 20 days (B); 30 days (C), and without hormone treatment 17α-MT (control). Each treatment included control was performed in triplicates. The percentage of male sex was 93.33 % at 30 days treatment and was higher (P<0.05) compared to controls (53.3 %). Additionally, the results showed that daily growth rate, biomass gain and survival rate of all treatments were not significantly different (P>0.05) with those of control. In conclusion, Artemia sp. contained 17α-methyltestosterone enhanced male percentage of P. kaurderni. Keywords: growth, male percentage, Artemia sp., survival rate, Pterapogon kauderni

Highlights

Banggai Cardinalfish (Pterapogon kauderni) is one of the endemic fish of the waters of the Banggai Islands, Central Sulawesi Province (Hopkins et al, 2005; Vagelli, 2011; Safir et al, 2020)
Results of analysis of variance showed that Daily growth rate (DGR) in all treatments did not show significant differences (P>0.05)
Biomass gain (BG) in P. kauderni feed Artemia sp. which has been soaked with the 17α MT hormone ranging from 0.93-1.17 g

Summary

Introduction

Banggai Cardinalfish (Pterapogon kauderni) is one of the endemic fish of the waters of the Banggai Islands, Central Sulawesi Province (Hopkins et al, 2005; Vagelli, 2011; Safir et al, 2020). The body morphology and behavior that is classified as unique from P. kauderni (Ndobe et al, 2013b) make it one of the marine ornamental fish sought by ornamental fish lovers, in Indonesia and the other countries (Lunn and Moreau, 2004). This is an advantage for the people of Banggai Islands in providing P. kauderni on the market. After the spawning process, the male parent incubates the eggs in the oral cavity until the larvae are released (ranging from 29 to 30 days) (Hopkins et al, 2005; Gunawan et al, 2010; Ndobe et al, 2013b)

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