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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan
Published by Universitas Riau
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Core Subject : Science,
Earth & Planetary Sciences
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Articles 2,919 Documents
 231   232   233   234   235 
The Dynamics of Phytoplankton Abundance in the PLTA Koto Panjang Reservoir inBatu Bersurat Village, XIII Koto KamparDistricts, Kampar Regency, Riau Province Ester Romastika Turnip; Tengku Dahril; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTPhytoplankton will respond to the nutrient material that is input into the Koto Panjang Reservoir in Batu Bersurat. The dynamics of phytoplankton abundance will occur depending on nutrients and light intensity based on time and depth. This study aims to look at the dynamics of phytoplankton abundance based on time and depth. This research was conducted in June-July 2019. The sampling locations were determined by 3 stations 4 times with a time interval of 1 week. At each station, there are 3 sampling points, namely on the surface, at 2 Secchi depth and at 4 Secchi depth. The parameters measured are temperature, brightness, depth, pH, DO, CO2, nitrate, and phosphate. Based on measurements at different depths, it was found that the abundance of phytoplankton was most surface and decreased at depths of 2 Secchi and 4 Secchi. Based on time, phytoplankton abundance is increasing every week. Water quality parameters recorded as follows, temperature 29-31 oC, transparency 153.5-161.25 cm, pH 5, DO 6.2-6.8 mg/L, CO2 7.3-9.3 mg/L, nitrate 0.056-0.082 mg/L and phosphate 0.59-0.96 mg/L.Keyword: The Dynamic of Phytoplankton, Water Quality Parameters, Reservoir Puddles
Population of Anabas testudineus of the Lubuk Siam Lake, Lubuk Siam Village, Siak Hulu Sub-District Riau Province Ade Novia Felni; M. Fauzi M. Fauzi; Nur El Fajri
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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ABSTRACT Betok fish is one type of species that is influenced by the season and lives in  the Lubuk Siam Lake. A research aimed to understand the standing Stock of Anabas testudineus in size distribution of fish caught in Lubuk Siam Lake. Fish was sampled in 3 sampling points using nets and traps. The research was conducted in April-May 2019. The Standing Stock was analyzed based on Leslie method. The results shown that the initial population (No) of the fish was 450 kg and the final population (Nt) was 438 kg, temperature was 27-28, clarity was 62-93 cm, and pH=6.Keywords: Leslie method, Oxbow lake, Maximum captured, Fish population
THE EFFECT OF LIMING, LIQUID AND POLY ALUMINUM CHLORIDE TO IMPROVE WATER QUALITY Rahma Liani; Budijono Budijono; Sampe Harahap
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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ABSTRACTIn general,  peat water has various acidity level water. To improve the quality of that water, addition of lime and coagulant such  as alum and poly aluminium chloride is necessary.A research aims to find out a dose of lime, alum and PAC to improve water quality has been conducted in March-April 2019. Water samples were taken fromthe Wonosari Village, Bengkalis. This research used experimental method, data were analyzed according to the complete random design model. There  were 9 treatments applied namely9 different dose of lime, alum and PAC : P1 (500mg lime,170mg alumand630mg PAC), P2 (500mg lime, 340mg alum and560mg PAC) P3 (500mg lime, 510mg alum and 490mg PAC), P4 (500mg lime, 680mg alum and420mg PAC), P5 (500mg lime, 850 mgalum and350mg PAC, P6 (500mg lime 1020mg alum and280mg PAC), P7 (500mg lime, 1190mg alum dan 210mg PAC), P8 (500mg lime, 1360mg alum dan 140mg PAC), P9 (500mg lime, 1530mg alum dan 70mg PAC). A packet of the  mixture   was mixedwith1L peat water and was kept for 30 minute. The water quality was then checked.Results shown that the best mixed dosage was P8 and P9 because it increased the pH of the water. The pH of peat water was improved, from 4 to 9. Data obtained shown that the mixture of lime, alum and PAC was effective for improving the quality of peat water.Keywords :acid water, calsium carbonat, coagulant and pH
Effect of Different Stocking Density on Growth and Survival Rate of Blue Swimming Crab(Portunus pelagicus)in Recirculation System Yesi Yonna Haliza; Niken Ayu Pamukas; Mulyadi Mulyadi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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ABSTRACTBlue swimming crab is fisheries commodity having high economic value. The aim of  study is  to knowthe best stocking density on growth and survival rate of blue swimming crab (Portunus pelagicus) in recirculation system. This research was conducted in July-August 2019. Located in Center for Brackish A quaculture Fisheries (BBPBAP) Jepara. The methods used was the exprerimental method, namely a completely randomized design (CRD) ofone factor with four levels of treatment and three replications required 12 experimental units with treatments P1 = 8 ind/32 liters, P2 = 10 ind/32 liters, P3 = 12 ind/32 liters and P4 = 14 ind/32 liters.The best growthrates was found in P1with stocking density of 8 ind/32 L with absolute weight growth 1.60 g,  the specific growth 8.81 g and survival rate 58.33%. Water quality during research were 25,1 -28, 90°C, pH 7.51-7.72, 4.21-6.04 mg/L dissolved oxygen and ammoniac 0.001-0.072 mg/L.Keywords: Blue swimming Crab, Stocking Density, Growth
CLEARING RATING RATE IN DIFFERENT SUBSTRATES ON PURNAMA BEACH WATERS OF DUMAI CITY OF RIAU PROVINCE Tri Prawoto; Syafruddin Nasution; Musrifin Galib
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT               Barnacle is one of the marine biota that belongs to the crustacean class and is one of the sub-classes of Wikipedia, whose life is permanently attached to hard objects submerged at sea and has properties that can damage and shorten the life of a building that it occupies. The purpose of this study was to determine the rate of sticking barnacles on wood, concrete and peralata substrates. This research was conducted from January 28 to March 10 2019 in the waters of the Purnama Coast in Dumai City. The method used is the experimental method. The results  are the highest rate of barnacle attachment found in wood is 63 ind/week, then the concrete substrate 35 ind/week and the lowest is the 18 ind/week pipe plastic substrate. The highest abundance of barnacles on wood substrates in the 6th week with a value of 25 ind/m2and the lowest abundance of barnacles was found on the paralon substrate in the 6th week with a value of 3 ind/m2. Keywords: barnacles, substrate, attachment rate, abundance, Dumai
UTILIZATION OF CHITOSAN FROM FRESHWATER CRAYFISH (Cherax quadricarinatus) CARAPACE WASTE TO MAKING LIP BALM Paradise, Nadia; Sukmiwati, Mery; Edison, Edison
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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ABSTRACT               This study was aimed to determine the characteristics of chitosan from freshwater crayfish carapace (Cherax quadricarinatus), to determine the effect of adding chitosan with different concentrations on the quality of lip balm and to determine the addition of the best chitosan concentration on lip balm. The method used in this research was an experimental method on the effect of adding chitosan from freshwater crayfish (Cherax quadricarinatus) carapace to making lip balm. Tests used in this study were the yield, moisture, ash content, nitrogen content, and the degree of deacetylation in the determination of chitosan quality and pH test, emulsion stability test and humectant test in the determination of lip balm quality. Based on the results showed that the characteristics of chitosan had a yield valueof 20.38%, 7.35% moisture content, 4.34% ash content, 4.54% nitrogen content and 73.74% deacethylation degree.The addition of chitosan with different concentrations in lip balm had a significant effect on pH value, emulsion stability and humectant of lip balm. The best treatment is  A3(the addition of 3% chitosan concentration) based on the pH value of 5.50; 99.46% emulsion stability; and humectant of 95.14%. Keywords:chitosan, freshwater crayfish, lip balm. 
Morphoanatomy of Pangasius sp reared in controlled photoperiod Rienta Bresdo; Eddiwan Eddiwan; Windarti Windarti
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Abstract Photoperiod manipulation may affect the morphoanatomy of   Pangasius sp. A study aims to determine the effects of photoperiod manipulation on Pangasius sp morphoanatomy   has been conducted on July to September 2019. A one factor CRD method with 3 treatments was applied. They were control (12 hours  dark and 12 hours  light), 18G6T (18 hours  dark and 6 hours  light) and 24G (24 hours  dark).  The fish reared for 52 days, they were feed on commercial pellet and were reared in tarp ponds (75 x 50 x 60 cm) that were completed with a water recirculation system. The density of fish was 25 fish/ pond. The fishes were sampled once/14 days, 3 fishes/ treatment. Parameters measured were body length, body weight, condition factor, fish survival, body color, liver condition (color, texture and hepatosomatic index (HSI)), viscerasomatic index (VSI), gonadosomatic index (GSI) and water quality (temperature, pH, DO and ammonia). Results shown that the photoperiod manipulation affects the Pangasius sp morphoanatomy and the 18G6T provided the best result.  By the end of the experiment, the  fish in this treatment was 186 mm TL, 52 gr BW, 2.7 CF, survival rate was 95%, dark body color, 2.81% HSI and 16.23% VSI.Keywords: Tarp  pond, light, IGS, IVS, IHS 
Types andDensity of Microplastic in The Coastal Area of Pariaman Regency, Sumatera Barat Province Annesa Fista Savitri; Adriman Adriman; Eni Sumiarsih
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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                    ABSTRAC  Pariaman Regency coastal area is affected by current and tide from Indian Ocean that contribute the presence of microplastic in that area. To understand the microplastic types and density, a research has been conducted in May-July 2019. There were 3 sampling sites (Pantai Mangguang, Pantai Ampalu and Pantai Gandoriah) and there were 3 plots (50x50 cm) placed in each site. Sediment inside the plot was scrapped 5 cm depth. The sediment was then sieved (5 and 1 mm mesh size), dried and soaked in 35% NaCl. The floating microplastics were then collected and identified using a dissecting microscope. Results shown that there were 4 types of microplastic present, they were film, fragmen, fiber and foam. The most common microplastic found was film (1,360item/m3). The density of microplastic found in the sampling site ranges from 400 - 1,840 item/m3. In the intertidal zone, the highest density of microplastic was found in the highest tidal level (2000 item/m3). Keywords: Plastic Pollution, Intertidal Zone, Sediment, Film.
THE EFFECT OF DURATION REPLACEMENT FEED TIME Tubifex sp. WITH PASTA FEED ON GROWTH AND SURVIVAL RATE OF KOI (Cyprynus carpio) FISH LARVA Fitri Merga Ayu; Sukendi Sukendi; Netti Aryani
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACTThe research was carried out for 40 days, from 10 May to 20 June 2019, at the fish hatchery and Breeding Laboratory Department of Aquaculture, Faculty of Fisheries and Marine. University of Riau. This study aims to determine the effect of the length of feed change time Tubifex sp. with the best pasta feed on the growth and survival of koi fish (Cyprinus carpio) larvae. That are kept for 40 days in an aquarium container size of 30x30x30 cm as many as 12 pieces, filled with water as much as 15 liters/container, densely stocked 2 fish/liter. The method used in this research was the experimental method. The design used was a Completely Randomized Design (CRD) one factor with 5 treatments and 3 replications.The treatments used were P1 (Tubifex sp. For 40 days), P2 (Tubifex sp. 10 days + 30-day Pasta ), P3 (Tubifex sp. 20 days + 20-day Pasta ), P4 (Tubifex sp. 30 days + Pasta 10 days), P5 (pasta for 40 days).The best growth research results was obtained in the treatment of P1 (Tubifex sp. For 40 days) with an average growth of absolute weight 3,43 grams, growth of absolute length 5,93 cm, specific growth rate of 13,84% /day. As for the variation of the best change of time, there were treatments in P4 (Tubifex sp. 30 days + 10day Pasta) with an average absolute weight growth of 2.97 grams, absolute length 5.31 cm, specific growth rate of 13.70% /day, for survival rate not significantly different for treatment. Water quality during the study was temperature ranging from 27-31 °C, pH 5,4-6,5 and DO of 4,1-5,2 ppm.Keywords : Feed Substitution, Tubifex sp., Pasta feed, koi fish (Cyprinus carpio) larvae, Growth, Survival Rate
Microplastic Type and Densityin the Coastal Area of the Apar Village, Pariaman, West Sumatera Province Rova Erwinda Fitri; M.Fauzi M.Fauzi; Adriman Adriman
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT Microplastic is plastic pieces with size (≤ 5 mm).The presence of microplastic may negatively affects the organisms, as it may be swallowed and can not be digested properly. To understand the correlation of microplastic presence and macrozoobenthos density, a research has been conducted in May-June 2019. There were 3 sampling sites and there were 3 plots (50x50 cm) in each site. Sediment inside the plot was scrapped   10 cm depth. The sediment was then sieved (5 and 1 mm mesh size), dried and soaked in 35% NaCl. The floating microplastics were then collected and identified using a dissecting microscope.Results shown that there were 4 microplastic type present, they were fiber, film, foam, and fragment. The most microplastictype was found is fiber with density 1200 item/m3. The lowest microplastictype was found is foam with density 280 item/m3. The enviroment  quality parameters are as follows : water temperature was 30-32 oC, soil temperature was 33-35 oC, salinity was 29-30 ‰ and sediment fraction type is muddy sand.Keywords:Pollution Plastic,Intertidal Zone, Sediment, Fiber, Foam 

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