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All Journal Jurnal Akuakultura Universitas Teuku Umar
Rizmauliana, Fadila
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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PENINGKATAN PENETASAN TELUR IKAN KOKI (Carassius auratus) MENGGUNAKAN ECENG GONDOK (Pontederia crassipes) PADA PEMIJAHAN INDUK Rizmauliana, Fadila; Waluyo, Waluyo; Tartila, Shobrina Silmi Qori
JURNAL AKUAKULTURA Vol 7, No 1 (2023): Jurnal Akuakultura Universitas Teuku Umar
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/ja.v7i1.7516

Abstract

Goldfish (Carassius auratus) is a type of ornamental fish with various body shapes and colors. Goldfish in Indonesia are classified as high-economic fish, because they are in great demand by the public, especially ornamental fish hobbyists. The demand for goldfish is quite high, it is necessary to increase the goldfish hatchery activities so that the supply of seeds can be fulfilled with good quality and quantity. This scientific article aimed to describe the goldfish hatchery techniques and discover the obstacles in goldfish hatchery activities. This activity was carried out on 26 December 2022 – 30 January 2023 at BPPP Tegal, Central Java. Goldfish hatchery techniques include preparation of spawning facilities, parent selection, broodstock rearing, broodstock spawning, egg hatching, and water quality control. The fertilization rate of the oranda goldfish is 97%, the hatching rate of the oranda goldfish is 91.79%, the survival rate of the larvae of the oranda goldfish is 60.25% and the survival rate of the seeds of the oranda goldfish is 59.46%. The temperature during the breeding activity is 24-33°C, DO at 4-11 mg/l, pH at 6-8, and ammonia at 0-0.25 mg/l. Water quality at the breeding site is good and optimal for goldfish hatchery activities. Water quality control is usually performed by changing the water by 50% of the pond height. 
REPRODUCTIVE BIOLOGY OF NATURAL BETTA FISH (Betta picta) IN THE GENDING MERTOYUDAN RIVER, MAGELANG REGENCY Rizmauliana, Fadila; Mujtahidah, Tholibah; Nofreeana, Andri
JURNAL AKUAKULTURA Vol 9, No 2 (2025): JURNAL AKUAKULTURA UNIVERSITAS TEUKU UMAR
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/ja.v9i2.10803

Abstract

Natural betta fish is one of the Betta fish that comes from nature and still has high genetic diversity because it has not been crossed with cultivated Betta fish. Many environmental changes affect the reproduction of natural betta fish in their natural habitat, so it is necessary to carry out studies related to the reproductive biology of natural betta fish (Betta picta). This research aims to determine various reproductive biology and the influence of water quality on the gonad maturity level of natural betta fish (B. picta). The research was conducted from October to November 2023 in the Gending River, Mertoyudan District, Magelang Regency, and the Integrated Laboratory of Tidar University. Fish samples were caught using a seser and placed in plastic containers for observation in the laboratory. The gonad maturity level, or GMI, was observed morphologically and analyzed descriptively. The results of this research were that the TKG consisted of TKG I-TKG V, the IKG value was 4.7%, the IG value was 48.2, the HSI value was 0.7%, the sex ratio was 1:1, the relationship between length and weight was allometric negative, and plankton abundance was 166.6ind/l. There was an increase in the second week of observation up to the sixth week.
Co-Authors Andri Nofreeana Mujtahidah, Tholibah Shobrina Silmi Qori Tartila Waluyo Waluyo