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All Journal AGROVET AGRISAINS MEDIA LITBANG SULTENG ILMU KELAUTAN: Indonesian Journal of Marine Sciences AGRIKA JFMR (Journal of Fisheries and Marine Research) Jurnal Intek Akuakultur Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan AGROMIX Samakia: Jurnal Ilmu Perikanan Techno-Fish Jurnal Ilmiah AgriSains Journal of Fish Nutrition Jurnal Cendekia Mengabdi Berinovasi dan Berkarya Tolis Mengabdi : Jurnal Pengabdian Kepada Masyarakat Journal of Fisheries & Marine Maslahat
Irawati Mei Widiastuti
Universitas Tadulako
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Education Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Other

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PRODUKSI Gracilaria verrucosa YANG DIBUDIDAYAKAN DI TAMBAK DENGAN BERAT BIBIT DAN JARAK TANAM YANG BERBEDA Widiastuti, Irawati Mei
AgriSains Vol 12, No 1 (2011)
Publisher : FAPETKAN UNTAD

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Abstract

The purpose of the research was to identify the highest production of Gracilaria verrucosa cultivated in a sea-fish pond with different seed weights and different plantation intervals.           The research hipothesis was that there was an interaction between different seed weight and planting interval on Gracilaria  verrucosa production. The research was done for 50 days. This research used a Completely Randomized Design in a Two Factorial Experiment with three replicates. The first factor was seed weights: 50 g, 100 g and 150 g. The second factors was plantation intervals included 10 cm, 20 cm, and 30 cm ntervals. The measured parameter was production of Gracilaria verrucosa. Data was analized by ANOVA and Least Significant Difference if the ANOVA result showed significant effect. The planting of Gracilaria verrucosa seaweed using different seed weights and planting intervals was significantly influenced the production of Gracilaria verrucosa. The highest seaweed growth  was was found at 50 g seed weight with 30 cm planting interval and 100 g seed with planting interval 10 cm (590,27 g m-1). The water quality in the research site still good for planting Gracilaria verrucosa seaweed. Key words: Gracilaria verrucosa, production, seaweed.
PEMANFAATAN ULANG LIMBAH ORGANIK DARI SUBSTRAT TUBIFEX SP. DI ALAM UNTUK PERTUMBUHAN BOBOT TUBIFEX SP. Sulistiyo, Andri; Widiastuti, Irawati Mei; Rizal, Ahmad
AgriSains Vol 13, No 3 (2012)
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At this time the demand of Tubifex sp is be promoted. This is related to use of Tubifex sp. as fodder seeds that high nutritious. Utilization of organic waste from Tubifex sp. substrate in nature is one effort that can be done to get the maximum results in the business of cultivating Tubifex sp. This research aims to assess the influence of organic wastes of different weight to the absolute weight growth of Tubifex sp. and as information for people who want to cultivate Tubifex sp. These studies using Random Design Complete (RAL) with 4 treatments 5 times repetition, i.e. without the addition of organic wastes (A), the addition of organic wastes 750 g (B), the addition of organic wastes 1250 g (C) and the addition of organic wastes 1750 g (D). To know the influence of the treatment provided diversity analysis, used in the treatment of influential then continued with BNJ. Results of the study showed that the highest growth in absolute weights in treatment C (48,06 g) and the lowest at the treatment A (19.38 g). Further test results of BNJ indicates that treatments without the addition of organic wastes, the addition of organic wastes 750 g, the addition of organic wastes 1250 g and the addition of organic wastes 1750 g another is diferent very markedly. Key words : Growth, organic wastes, substrate, Tubifex sp.
Effect Of Photoperiode On Cell Density And Chlorophyll-a Chlorella sp. Laboratory Scale Putalan, Reinal; Widiastuti, Irawati Mei
AgriSains Vol 20, No 3 (2019)
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Chlorella sp. as a source of nutrition for aquatic organisms. Chlorella sp. is one way to meet the needs of aquatic organism feed. In the culture of Chlorella sp., light plays an important role in the process of photosynthesis. The photoperiod of the light will affect the density of cells and chlorophyll produced by Chlorella sp. Therefore, it is necessary to analyze cell density and chlorophyll content with different lighting periods. The purpose of this study was to determine cell density and chlorophyll-a content with different light photoperiode in Chlorella sp. culture laboratory scale. This study was used a complete randomized design with 3 treatments (A (12T: 12G), B (16T: 8G), and C (20T: 4G) and 6 replications. The results show that treatment B (16T: 8G) produces the highest cell density ( 1733.5 x 104 cells / ml) while the highest chlorophyll-a content in treatment A (12T: 12G) was 9.76 μg / ml.
Growth and Survival Rate Goldfish (Carassius auratus L.) in Various Natural Feed Dosage Tubifex sp. Risdawati, Risdawati; Widiastuti, Irawati Mei
AgriSains Vol 22, No 1 (2021)
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Abstract

Goldfish (Carassius auratus L.), one of the most popular and freshwater ornamental fish to be cultivated in Indonesia. One obstacle in the cultivation of Carassius auratus L. is the high feed cost (60-70%) of the total production cost. The natural food source for fish Carassius auratus L. is Tubifex sp. which has a high nutritional content. The aim of the study was to determine the dosage of Tubifex sp. best for the growth and survival rate of goldfish (C. auratus L.). This research was conducted at the Laboratory of Water Quality and Aquatic Biology, Faculty of Animal Husbandry and Fisheries, Tadulako University for 2 month (January to March 2020). The experimental design used a Completely Randomized Design (RAL) with 5 treatments and 4 replications. The treatment in this study was the administration of silk worms with different doses (A = 6%; B = 8%; C = 10%; D = 12%; E = 14%). The variables measured included absolute weight growth, survival and water quality. Data were analyzed by analysis of variance (ANOVA), with further tests BNJ using Excel 2010 and Minitab 16 application programs. The results showed that the natural feed (Tubifex sp.) shows a significant growth in absolute weight, but has no effect on survival. The absolute growth of goldfish seeds was the highest in the feeding of Tubifex sp. with a dose of 12% of 14.82 ± 2.76 g with a survival rate of 90.63% ± 6.25. Water quality (temperature, pH, dissolved oxygen and ammonia) is still in accordance with the growth needs of goldfish fry.
Biomass and Nutrition Content of Silk Woms (Tubifex sp.) on the Substrate of Germented Chicken Manure Anita, Putri; Widiastuti, Irawati Mei
AgriSains Vol 22, No 2 (2021)
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Abstract

Silk worms (Tubifex sp.) are a natiral food that is wederly used in larvae and fish seed hatchry in the aquaculture industry, with the use of silk worms which are still dominated by the catch of dialar so that there activities result in a decrease in production in nature while the demand for silk worms. It is quite high, one of the offerts to meet the availability of silk worms as natural food for the cultivation process, silkworm culture is crreid out. The succes of silk worm culture is detrmined by the culture media containing organic and non-organic  materilas such as fermented chichen manure, rice baran and tofu dregs. This study pims to deterimine the effect of using the substrate with the additon of termented chicken manure on the grouth of biomass and nutrient content of silk worms (Tubifex sp.). This study was conducted from August 2020 to October 2020 at the Laboratory of Water Quality and Aquatic Biology, Faculty of animal Husbandry and Fisheries, Tadulako University. Hammer. The silk worms that are cultured are silk worms taken from nature under the bridge II Palu Jl I Gusti Ngurah Rai, Tawanjuka, Kec. South Palu City. Central Sulawesi Province. This study was designed using a completely randomized design wiht 4 treatment of 5 replication  in order to obtain 20 experimental  units. Experiments were carried out to see the growth rate of biomass and nutrient content of silkworm (Tubifex sp.) from the culture  process on the substrate of fermented chiken manure, rice bran and tofu pulp. The results showed that the process of biomass growth and good nutritional content was found in the treatment where the amount of substrate was 50 g/L of fermented chicken manure, 50g tofu and 100g of rice bran.
PENGGUNAAN EKSTRAK DAUN JAMBU BIJI (Psidium guajava L.) SEBAGAI DESINFEKTAN PADA DAYA TETAS DAN LAMA PENETASAN TELUR IKAN MAS (Cyprinus carpio L.) Irawati Mei Widiastuti; Desiana Trisnawati Desiana Trisnawati Tobigo; Wahyuni Wahyuni
AgriSains Vol 13, No 2 (2012)
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Purposed this research was to know the excellent concentration of Psidium guajava L. leaf extract which give the highest hatching rate and hatching time of goldfish (Cyprinus carpio L.). The result was hoped to become an information source means to production high quality of goldfish seeds. The research used Completely Randomized Design whit five replication. The treatments were extract leaf Psidium guajava L. concentration : A (without leaf extract), B (30 ppm of leaf extract), C (32 ppm of leaf extract), D (34 ppm of leaf extract), and E  (36 ppm of leaf extract). The measured parameter were hatching rate and hatching time. Data that was analized by ANOVA and BNJ. The using extract leaf Psidium guajava L. give very significant effect to hatching rate but didn’t give any influence toward the hatching time of goldfish. The highest hatching rate of goldfish was at treatment D (34 ppm) with hatching rate amount 76% with hatching time 48,42 o’clock. Key words : Goldfish, hatching rate, hatching time, leaf Psidium guajava L.
Co-Authors A. Masyahoro Abdul Masyahoro Ach. Khumaidi Achmad Rizal Achmad Yani Yayan Agoes Soegianto ahmad rizal Andi Pertiwi Damayanti Anita, Putri Ariatna Dewi Mangia Asus Maizar Suryanto H Aswad Eka Putera Azra, Mohamad Nor Desiana Trisnawati Tobigo Dg. Masese, Risa Apriana A. Diana Arfiati Diana Putri Renitasari E Ernawati, E Eka Rosyida Era Insivitawati Ernawati Ernawati Ernawati Hasmirayanti Heriyanti Rukka Herjayanto, Muh. Insivitawati, Era James Yosep Walalangi M Ashad Madinawati Moh. Awaludin Adam Moh. Awaludin Adam Muhammad Musa Muhammad Musa Nikmatullah, Muhammad Novalina Serdiati Nur Hasanah Puspitasari, Asthervina Widyastami Putri Anita Putut Har Riyadi R.R. Sri Karuniari Nuswardhani Renitasari, Diana Putri Rini Fitriasari Pakaya Risdawati Risdawati, Risdawati Roni Hermawan Roni Hermawan, Roni Rusaini Saheriani Saheriani Samliok Ndobe Septina F. Mangitung Septina F. Mangitung Siti Helmyati Sulfa Ayulandari Sulistiyo, Andri Taufiq Eka Riandhana Utami, Cahyaning Rini Yuliana Yuliana zulqifar Jusman