TY - JOUR AU - Syamsunarno, Mas Bayu AU - Mustahal, AU - Faqih, Achmad Noer AU - Putra, Achmad Noerkhaerin AU - Herjayanto, Muh. PY - 2022/09/04 Y2 - 2024/03/29 TI - Spawning activity of Oryzias woworae Parenti & Hadiaty 2010 with the Suplementation Spirulina Meal in the Diet JF - Jurnal Biologi Tropis JA - JBT VL - 22 IS - 3 SE - Articles DO - 10.29303/jbt.v22i3.3777 UR - https://jurnalfkip.unram.ac.id/index.php/JBT/article/view/3777 SP - 895-901 AB - <p><em>Spirulina platensis</em> is a feed additive that can improve the reproductive performance of fish. It has never been given to the endemic fish <em>Oryzias woworae</em> which can lay eggs every day. Therefore, a study was conducted that aims to examine spawning activities related to egg-laying behavior, number of eggs, and egg diameter of <em>O. woworae</em>. The study used a sex ratio of 1♂:1♀ in spawning. The test feeds were commercial feed (Feng Li 1) or 0% without spirulina (treatment A), the addition of spirulina 5% (treatment B), 10% (treatment C), and 20% (treatment D). Observations were made every hour for 6 days. The spawning temperature was controlled at a value of 26.6±0.2°C. The results showed differences in the behavior of <em>O. woworae</em> in releasing eggs on spawning days. Giving spirulina causes the behavior of releasing eggs to occur at intervals of 1-3 hours, while without spirulina, it only occurs 1 hour on spawning days. The highest number of eggs was produced by giving spirulina 20% with a diameter range of 1.35-1.37 mm. The presence of a small egg diameter in the 20% spirulina treatment indicated that an increase in the number of eggs affected the ovaries capacity, so the diameter decreased. However, the average diameter of 20% of spirulina eggs was still the same as without spirulina administration. The stable temperature at 26.6±0.2°C caused the spawning activity of <em>O. woworae</em> to only occur in the morning between 07:00-09:00.</p> ER -