This research was carried out from 25th October to 5th December 2021 at the Brackish and Marine Water Laboratory, Faculty of Fisheries, Pekalongan University. The purpose of this study was to determine the effect of adding kencur (Kaemferiagalanga) to feed on milkfish growth. The study used laboratory experimental methods with 4 treatments and 3 replications. The treatments used were A (0% or feed without kencur), B (2% kencur powder/100g feed), C (4% kencur powder/100g feed) and D (6% kencur powder/100g feed). The results showed that treatment B gave the highest growth yield of 8.59g, followed by treatment C 4.95g, treatment D 3.78g and the lowest was treatment A, namely 3.78g. After analyzing the variance, the results of the F count are greater than the F table, which means that the addition of kencur to feed has an effect on the growth of milkfish. Survival rate of fish during treatment for all treatments was 100%. The water quality during the study was still within a reasonable range, namely temperature 28 -30 C, salinity 18-20 ppt, pH 7.5-7.9 and DO 4.6 - 5 ppm.Keyword: Milkfsih, Kaempferia galanga, Growth
Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak buah keben yang dapat digunakan sebagai obat bius untuk bass laut dan mengetahui konsentrasi ekstrak buah keben dalam proses mencengangkan yang memberikan daya tahan tertinggi benih bass laut. Metode eksperimental digunakan dalam penelitian ini dengan Rancangan Acak Lengkap (RAL) yang terdiri dari 5 perlakuan dosis: 0 mg / l; 5 mg / l; 10mg / l; 15 mg / l dan 20 mg / l dengan 3 ulangan. Data dianalisis menggunakan analisis varians, normalitas pertama dan variasi data homogenitas dilakukan dan untuk mengetahui perbedaan efek antara perawatan dengan uji Tukey. Variabel yang diamati adalah kelangsungan hidup benih ikan bass dan kualitas air. Hasil penelitian menunjukkan bahwa penggunaan ekstrak buah keben dengan perbedaan dosis yang berbeda sebagai anestesi ikan memiliki efek yang sangat signifikan terhadap kelangsungan hidup ikan bass (Lates calcarifer). Dosis optimal untuk kelangsungan hidup bass laut dengan penggunaan ekstrak buah keben adalah 5 mg / l sebesar 94%. Kualitas air yang diukur selama penelitian adalah suhu, pH, dan oksigen terlarut (DO). Temperatur berkisar antara 26-26.5˚C, pH berkisar antara 6.78-7.20; Oksigen terlarut (DO) berkisar antara 5,55 - 6,95.
Floating cage fish farming is an aquaculture activity that is mostly carried out on the coast of Pekalongan. The purpose of this study was to estimate the carrying capacity of Pekalongan coastal waters as a floating net cage aquaculture activity zone. The research method used is descriptive qualitative and quantitative descriptive by calculating the indicators of Trophic Status Index (TSI), phosphorus, feed conversion ratio, and the carrying capacity level of the waters. The results showed that chlorophyll-a values ranged from 6.44-8.24 ꭒg/L, total phosphorus 12.44-14.80 ꭒg/L, feed conversion ratio 1.10-1.25, TSI (Trophic Status Index) values 48.2-54.6, harvested biomass 120-157 kg/ floating net cages (KJA). The carrying capacity of the waters for KJA cultivation is 145.43 tons of fish/year, and the number of existing KJA for cultivation is 110 KJA. The conclusion from the results of this study is that the carrying capacity on Pekalongan coastal waters when used as a floating net cage aquaculture activity zone is estimated to be able to accommodate approximately 145.43 tons of fish/year or the equivalent of 121 KJA. Currently, there are 110 KJA plots in the Jeruksari coastal waters, which means that the maximum carrying capacity of the waters that can be used for KJA cultivation is 11 KJA.
The objectives for this research are to know the effects of immunostimulants and optimal doses to increase the growth of white snapper fish. This research was conducted from August 25, 2018 until September 27, 2018 in the Laboratory of Brackish Water at the Fisheries Faculty of Pekalongan University. The methods used was the Completely Randomized Design Method consisting of 4 treatments and 3 replications. The given is artificial feed which mixed with differents doses of imunostimulant, treatment consist of A (0 ml/kg feed), Treatment B (5 ml/kg feed), Treatment C (10 ml/kg feed) and Treatment D (15 ml/kg feed). The seeds of white snapper fish are used for this research with size 4-5 cm and the density of 1 fish per liter. The parameters observed were biom ass growth, daily specific growth rate (%), ratio of the amount of feed needed, efficiency of feed utilization (%), degree of life (%) and the water quality as supporting data. The research results showed that the given immunostimulant on the feed had an effects on the growth of white snapper fish, Calculated F (13,474) > F Table 5% (4,066) and the F Table 1% (7,591). The use of immunostimulant give the highest results on the biomass growth of white snapper fish on the Treatment D of 9,13 gram, FCR 0,92, EPP 42.86 %, SGR 3,31 %, and SR 100%. The water quality during the research showed that the temperature range from 28 - 30 C, pH range is 7.0 – 7,4, Dissolved Oxygen range is 5.2 – 7.2 ppm, Salinity range is 32 – 35 ppt and Ammoniac range is 0.1 – 0.3 ppm. Keywords: White snapper fish seeds, Immunostimulants, Growth
Research objective to find out the optimal growth of milkfish seeds by giving probiotic withdifferent doses.This research was conducted on Agust 15th–September 14th, 2020 and is located at Marine and Brackish Water Laboratory, Faculty of Fisheries, Pekalongan University. The test fish used in this study was the 2,5 cm milkfish seeds obtained from fish farm’s from Pekalongan City. The research was carried out on a laboratory scale and the experimental design applied was completetely randomized design (CRD) which included 5 treatments and 3 replications, namely A (control), B (5 ml/kg of feed), C (10 ml/kg feed), D (15 ml/kg feed) and E (20 ml/kg feed). In order to find out the response ofthe growth of milk fish seeds to the addition of probiotic with different doses, a tukey test was performed. The highest growth of milkfish was obtained in treatment D that was 10,82gr, then followed by treatment C was 9,97gr, treatment B was 9,38gr, treatment E was 8,99gr and the lowest was in treatment A which was 7,73 gr. The results of the analysis of variance is known that the calculated F value is greater than the F table, which means the addition of probiotic with different doses has a very significant effect on the growth of milkfish seeds.Keywords: Probiotic,milkfish,growth
<pre>This study aims to determine the effect of the decrease in media salinity on survival rates of grouper fish and determine the relationship between the survival rate of the cantang grouper and the level of decrease in media salinity in the acclimation process.</pre><pre>The study was conducted in June 2018 at the Brackish and Sea Water Laboratory of Pekalongan University in Pekalongan. The test fish used was a cantang grouper with a size of 3-5 cm. This cantang grouper juvenille is obtained from the Situbondo Marine Cultivation Center. The design used was a completely randomized design with 4 treatments and 3 replications. The treatment applied was a decrease in the level of media salinity as follows: 2 ppt/hour, 4 ppt/hour, 6 ppt/hour and 8 ppt/hour. The survival rate of the grouper fish is analyzed using variance analysis. Furthermore, an orthogonal polynomial analysis was performed to correlate the survival rate of the grouper fish to the level of decrease in media salinity.</pre><pre>The highest survival rate of the grouper grouper was obtained at a level of decrease in salinity of 2 ppt/hour ie 91.67%, then a decrease in salinity of 4 ppt/hour ie 61.11%, a decrease in salinity of 6 ppt/hour ie 46.67% , and the lowest at a decrease in salinity of 8 ppt/hour which is 25%.</pre>The results of the variance analysis revealed that the level of decrease in media salinity had a very significant effect on the survival rate of bushy groupers. The results of orthogonal polynomial analysis showed that the relationship between the survival rate of the grouper fish to the level of decreasing salinity of linear media with the equation: Y = 109.72 - 10.72 X (R<sup>2</sup> = 0.97) (R<sup>2</sup> = 0.97).
<p align="center"><span><span style="font-size: medium;">ABSTRACT</span></span></p><p><span><span style="font-size: medium;"><span> </span>This study was conducted to determine the effect of saponin with different doses on mortality of white snapper (Lates calcalifer). The study was conducted on 18 to 31 July 2017 at the Center for Sea Aquaculture Development (BBPBL) Pesawaran District, Lampung. The experimental design used was Completely Randomized Design (RAL) with 4 treatments and 3 replications. The treatments included, treatment A (3 ppm), B treatment (5 ppm), C treatment (7 ppm), and D treatment (9 ppm). The results showed that administration of saponin with different doses gave a very significant effect on mortality of white snapper (F count> F table). The fastest time of death can be in treatment D (9 ppm) that is 45 minutes, followed by treatment of C (7 ppm) that is 74.6 minutes, then treatment B (5 ppm) is 91 minutes and longest time of death in treatment A ( 3 ppm) ie 128.6 minutes. The water quality of the research media is still feasible for the medium of snapper maintenance ie temperature 290 C, salinity 33 ppt, pH 7.82-8,10, DO 5,6-6,4, ammonia 0,11-0,13 ppm </span></span></p><p><span><span><span style="font-size: medium;"> </span></span></span></p><p><span><span style="font-size: medium;">Keywords: White snapper, dose of saponin, mortality<span> </span></span></span></p>
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