AQUASAINS
Not a member yet
195 research outputs found
Sort by
BUSINESS PROSPECTS FOR CULTIVATION OF OYSTER (Crassostrea gi-gas) IN OKAYAMA, JAPAN
Get PDFJapan is known as one of pioneering countries in oyster cultivation. This study aims to reveal the prospects for the cultivation of pacific oysters. The analysis of investment evaluation criteria in this study is based on financial analysis methods which include Benefit-Cost Ratio (BCR), Break Even Point (BEP), Return of Investment ROI, and Payback Period. The process carried out in the oyster cultivation steps starts from spawning and oyster fry, growth control (Yokusei), hanging (Hansuika) and seeding (Tanetsuke), check growth and landing and marketing. Based on the results of data analysis, it is obtained that the values of BCR, BEP, ROI, and Payback Period respectively are 1.88, 1,155.5 kg, 47%/year, 25.6 months. In this analysis, it is obtained that the BCR value is more than 1, so the business prospects for the oyster cultivation are very feasible to do. The benefit of this study is that the description of prospects and the financial analysis presented can be a consideration and reference for people who have an interest in oyster farming, especially for small-scale businesses
BIOCONCENTRATION FACTORS OF HEAVY METALS COPPER (CU) AND ZINC (ZN) IN GREEN MUSSELS (Perna viridis) IN THE WATERS OF TAMBAK LOROK SEMARANG
Get PDFTambak Lorok is a coastal area in Semarang. These waters have the potential to be contaminated with heavy metals Copper (Cu) and Zinc (Zn). The study aimed to determine the concentration of Cu and Zn in water, sediment and soft tissues of Perna viridis, knowing the effect of shell size on heavy metal absorption, knowing the bioconcetration factors of heavy metals and knowing the maximum limit of weekly consumption of Perna viridis. The study was conducted in November 2020. Determination of the location of the study using the Purposive sampling method.Concentrations of Cu and Zn in water, sediment and Perna viridis by the Atomic Absorption Spectrophotometer method. The results showed the content of Copper in water ranged from 0.06-0.151mg/l; sediments 26.634-38.433 mg/l and green mussels 4.76-11.00mg/l. Heavy metal Zinc is not detected in water, sediment and green shells one factor is that the tools used are insensitive to low concentrations of metals. Based on the results of statistical tests the difference in shell size has no effect on the absorption of Cu in soft tissues. Bioaccumulation levels belong to the low-moderate category. The safe limit of consumption of green mussels for weight 40 kg is 15.683 mg/weeks and for weight 60 kg is 23.524 mg/weeks
EFFECTIVENESS OF FERMENTED Ul-va lactuca ON FEED ON GROWTH RATE OF CARP (Cyprinus carpio)
Get PDFThis research was conducted to determine the effectiveness of fermented Ulva lactuca in feed on the growth rate of tilapia and to determine the best dose of the effectiveness of fermented Ulva lactuca on the growth rate of tilapia. This study used a completely randomized design with four treatments and three replications of 0%, 10%, 20% and 30% on feed. The carp used with fish length ranging from 7-9 cm and an average body weight of 3-4 g were reared for 42 days. The results showed that the addition of fermented ulva lactuca had a significant effect on the specific growth rate of tilapia, survival rate, protein efficiency ratio (PER), protein utilization efficiency (EPP). The addition of 30 % fermented Ulva lactuca in the feed was the best dose for the growth rate of tilapia. The specific growth rate was 19.42%, the efficiency of protein utilization was 68.76%, and the protein efficiency ratio was 19.41% while the survival rate was 55.56%. The addition of Ulva lactuca in feed can increase the growth rate of tilapia
DENSITY AND DISTRIBUTION PATTERN OF BIVALVES IN WATERS OF MALANG RAPAT VILLAGE, GUNUNG KIJANG DISTRICT, BINTAN REGENCY
Get PDFThe purpose of this study was to determine the density, diversity, uniformity, dominance and distribution pattern of bivalves in the waters of Malang Rapat Village. This research uses purposive sampling method. Determination of the sampling point based on the consideration of activities in the waters of Malang Rapat Village. Sampling using a quadrant transect method measuring 1x1 meter. The results showed that the highest species density was Gafrarium pectinatum with a value of 63,333 ind/ha, and the lowest species was Pinctada radiata with a value of 1,111 ind/ha. The species diversity index obtained values in the range of 0.54-0.76 and the category of each station is low. The uniformity index is obtained with a value in the range of 0.56-0.76 and categories at stations I and III are medium, stations II and IV are high. The dominance index obtained values in the range of 0.22-0.42 and the category at each station are low, the dominant species was G. pectinatum with a value of 0.38. The distribution pattern of bivalves in the sea of Malang Rapat Village at stations I and 3 obtained values of 2.43 and 3.05 with clustered categories, while at stations II and IV obtained values of 0.07 and 0.48 with the same or uniform categories
GROWTH AND SURVIVAL OF TILAPIA (Oreochromis niloticus) WITH STARVED PERIODICALLY IN BEDENG MUNIR VILLAGE, SOUTH PAGAR ALAM
Get PDFAbstract This time fish farmers often face constraints on the high price of commercial feed which results in low profits for the farmers. One solution to reduce artificial feed is periodic starvation. Starvation can reduce and increase feed efficiency while increasing production and fish can grow equally without fasting. The purpose of this study was to determine the growth and survival of periodically fasted tilapia (Oreochromis niloticus) in Bedeng Munir Village, South Pagar Alam. The method used in fish farming consisted of two treatments, that is P0: control and P1: fasting treatment (fish were given commercial feed for 4 days and fasted for 1 day). The parameters observed were absolute length growth, absolute weight growth, total feed consumption, feed efficiency, survival, and water quality. The results showed that the P1 treatment produced the highest absolute weight growth of 16.5 g, the highest absolute length growth was 1.35 cm, the lowest amount of feed consumption was 1540 g, the highest feed efficiency was 204.94%, the survival rate was 89. %,. While water quality in both the treatment is still in the range of tolerance for tilapia as temperature 21.4 to 24.2 0C and pH 7.6 to 8.1.KeywordsGrowth, tilapia, starvation, survival
WELFARE ANALYSIS OF VANNAMEI FARMERS IN PASIE NAN TIGO VILLAGE, KOTO TANGAH DISTRICT, PADANG REGENCY, WEST SUMATRA
Get PDFPenelitian ini bertujuan untuk mengetahui besarnya biaya, penerimaan, pendapatan dan tingkat kesejahteraan rumah tangga pembudidaya udang vannamei. Metode yang digunakan dalam penelitian ini adalah metode survei pada pembudidaya udang vannamei di Kelurahan Pasie Nan Tigo, Kecamatan Koto Tangah, Kota Padang, Sumatera Barat. Responden pada penelitian ini ditetapkan secara sensus yaitu sebanyak 10 orang pembudidaya. Analisis data yang digunakan adalah data primer dan data sekunder. Hasil penelitian menunjukkan bahwa biaya rata – rata yang dikeluarkan pembudidaya udang vannamei di Kelurahan Pasie Nan Tigo selama 3 siklus pemeliharaan dalam setahun sebesar Rp. 268.198.500, Penerimaan rata – rata sebesar Rp. 1.280.398.500 per tahun dan Pendapatan rata-rata sebesar Rp. 1.012.200.000 per tahun. Tingkat kesejahteraan rumah tangga pembudidaya udang vannamei rata - rata berada di angka 5,35 yang artinya rumah tangga pembudidaya dikatakan sejahtera karena mempunyai nilai tukar pendapatan rumah tangga pembudidaya lebih dari satu
SHUTER, THE INNOVATION TOOLS TO REPLACE STONE FOR HANDLINE BAIT OF TUNA
Get PDFTuna bait handline is used to catch small pelagic fish, the catch of which is used as tuna handline bait. Unfortunately, the tools used are natural beach stones, whose presence is dwindling, hard to find and also threatens beach abrasion. The purpose of this study was to find an effective, easy-to-use tool as a substitute for natural stone ballast in the tuna bait handline with the glass pump fishing method. The method used is the experimental method. This research is divided into two stages, namely preliminary research to determine the length of the shutter wire and the main research to determine the ideal weight and its effectiveness on the catch. Preliminary research from July to August 2021, followed by core research, namely testing shutter devices with different weights. (300gr, 400gr and 500gr) were repeated 4 times at FAD Makbon, Kab. Sorong in September 2021. Data analysis used a Completely Randomized Design, and qualitative descriptive to describe the best Shuter construction and the results of testing the effectiveness of the shutter with the fisherman's bait handline. The total fish caught on the three Shuters were 53 fish, with a total weight of 112, 66 kg. The composition of the catch consisted of 53 baby tuna (80,485 kg), 11 salmon (7,687 kg), 7 tuna (22,864 kg), and 3 skipjack tuna (1,630 kg). The length of stainless wire required for Shuter is 80 cm, the ideal Shuter weight and is stable enough to operate in FADs is 300 gr, 400 gr and 500 gr. The response of the fish caught was mostly on Shuter with a length of 80 cm and a weight of 400 gr
DIFFERENCES IN THE VULNERABILITY OF MEDAKA FISH (Oryzias celebensisis) MALE AND FEMALE TO CLORPYRIPHOS INSETICIDE
Get PDFChlorpyrifos is one of the most widely used organophosphate insecticides used to control pests on plants. The use of insecticides will produce residues in the soil and on plants and can be carried by rain flows to water bodies. This can pollute aquatic ecosystems and could negatively affected the growth of aquatic biota like Oryzias celebensis. This study aimed to determine the susceptibility of male and female medaka celebes (Oryzias celebensis) to chlorpyrifos insecticide. In this study, five fish medaka celebes were put in each jar in one jar for male medaka fish and female medaka fish with five replications. The parameters measured were survival rate, oxygen consumption rate between male and female of O. celebensis, temperature and pH. Statistically the survival rate of male and female medaka fish showed no statistically significant difference (P>0.05). Likewise, there was no difference between the oxygen consumption levels of male and female medaka fish before and after exposure to chlorpyrifos insecticide (P>0.05). This study concluded that there was no difference in susceptibility to chlorpyrifos insecticides between male and female medaka fish.
WATER QUALITY POLLUTION INDEX ANALYSIS IN DOWNSTREAM OF PORONG SUB-WATERSHED, JABON DISTRICT, SIDOARJO REGENCY
Get PDFSungai Porong atau disebut Sub-DAS Porong merupakan bagian dari Sungai Brantas yang telah berubah fungsi sebagai tempat pembuangan lumpur panas Porong. Adanya bencana lumpur ini membuat perubahan yang mempengaruhi kondisi air di sungai, sawah, tambak, dan pemukiman. Penelitian ini bertujuan untuk mengetahui kualitas air dan indeks pencemaran kualitas air pada berbagai jenis penggunaan lahan berdasarkan kondisi di sekitar muara sungai, penelitian ini dilakukan di Porong pada berbagai jenis penggunaan lahan berdasarkan kondisi di sekitar muara sungai. Penelitian ini dilakukan di Sub DAS Porong Hilir, Kecamatan Jabon, Kabupaten Sidoarjo, sedangkan Laboratorium Analisis dilakukan di Laboratorium Ilmu Tanah Fakultas Pertanian dan Laboratorium Teknik Lingkungan UPN “Veteran” Jawa Timur. Penelitian ini menggunakan metode indeks pencemaran kualitas air yang tertuang dalam Peraturan Menteri Lingkungan Hidup No. 115 Tahun 2003. Kualitas air pada DAS mengacu pada Peraturan Pemerintah No. 82 Tahun 2001, sedangkan pengambilan sampel air mengacu pada SNI 6989.57:2008. Nilai indeks pencemaran air menunjukkan bahwa penggunaan lahan termasuk dalam kategori tercemar ringan dengan hasil perhitungan sebesar 0,740 (Kolam), 1,007 (sawah), 1,107 (Sungai Induk), dan 1,461 (Pemukiman). Indeks kualitas air di permukiman sangat berpengaruh, hal ini disebabkan oleh degradasi biologis fungsi lahan. Selain itu, di sungai tersebut terdapat pembuangan limbah domestik dan industri setempat. 2008. Nilai indeks pencemaran air menunjukkan bahwa tata guna lahan termasuk dalam kategori tercemar ringan dengan hasil perhitungan sebesar 0,740 (Kolam), 1,007 (sawah), 1,107 (Sungai Induk), dan 1,461 (Pemukiman). Indeks kualitas air di permukiman sangat berpengaruh, hal ini disebabkan oleh degradasi biologis fungsi lahan. Selain itu, di sungai tersebut terdapat pembuangan limbah domestik dan industri setempat. 2008. Nilai indeks pencemaran air menunjukkan bahwa tata guna lahan termasuk dalam kategori tercemar ringan dengan hasil perhitungan sebesar 0,740 (Kolam), 1,007 (sawah), 1,107 (Sungai Induk), dan 1,461 (Pemukiman). Indeks kualitas air di permukiman sangat berpengaruh, hal ini disebabkan oleh degradasi biologis fungsi lahan. Selain itu, di sungai tersebut terdapat pembuangan limbah domestik dan industri setempat.
DIGITAL MARKETING OF FISHERY PRODUCTS, MARKETING STRATEGY DURING THE COVID-19 PANDEMIC
Get PDFThe development of technology affects people's lifestyles, especially in meeting their daily needs. This is what underlies business actors starting to look at digital marketing marketing. This study aims to determine the marketing strategy of processed fishery products using digital marketing during the Covid-19 pandemic. This research was conducted from June to September 2021 in Kendari City. The results of the study show that there is a relationship between the application of digital marketing with sales volume and marketing strategies by utilizing more than one digital by providing an attractive appearance for consumers