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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Arjuna Subject : -
Articles 2,919 Documents
 213   214   215   216   217 
THE EFFECT OF BIORAFIA DENSITY ON DECREASING NITRATE ON THE SAIL RIVER Sitompul, Dorlan Rotua; Budijono, Budijono; M.Hasbi, M.Hasbi
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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ABSTRACT The Sail River has been contaminated with nitrate can be reduced by using biorafia (interweaving of several raffia knot masks that are mashed with shapes resembling duster as a place to attach to microorganisms). This study aimed to determine the effect of the density of biorafia in reducing levels of nitrate contained in the water of the Sail River. The study was conducted in March-April 2019 on the Sail River. This study uses a Completely Randomized Design (CRD) with a single factor, namely biorafia. Using three treatments, namely different densities (P1 = infrequent / 50simple, P2 = moderate / 75impul and P3 = meeting / 100impul), and three replications. Sampling was carried out before and after passing biorafia on artificial trenches with a one-month interval. The results showed that biorafia was able to reduce the levels of nitrate with a decrease in average not much different. The decrease in nitrate ranges from 0.1375-0.33473 mg / L to 0.0750-0.1167 mg / L (35-44%). Biorafia can be used in reducing levels of nitrate. Keywords: Biorafia, Nitrate,raffia
Blood Condition of (Clarias batrachus) from the Tapung Kiri and Sail Rivers Riau Province Pratiwi, Via Anggraini; Eddiwan, Eddiwan; Efawani, Efawani
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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Abstract Clarias batrachus is a freshwater fish that inhabit the Tapung Kiri and Sail Rivers. The water quality in the Tapung Kiri River is relatively good, while that of the Sail River is polluted. As the water quality in general affects the blood condition of the fish, it is predicted that blood condition of C. batrachus from the Tapung Kiri and Sail Rivers are different. A research aims to understand the blood condition ofC. batrachus from those rivers were conducted from February-March 2019.There were 12 fishes captured from each river. The fish blood was taken and then analyzed for the number of erythrocytes, leukocytes, hematocrit and leucocrite levels and the type of leukocyte was identified. Results shown that the number of erythrocytes, leucocyte, haematocrite and leuoccrite levels of the fish from the TapungKiri River was 2,160,000 cells/mm3, 200,833cells/mm3, 32.96% and 1.71% respectively. While those of the Sail River was 2,121,667 cells/mm3, 211,375 cells/mm3, 31.27% and 1.81% respetively. There were six types of leukocytes present in the blood of fish from both areas. In the fish from the Tapung Kiri River, there were eosinophil (5.7%),lymphocytes (72.1%), monocytes (3.6%),neutrophils (2.6%) and thrombocytes (16.0%). While in the fish from the Sail River, there were eosinophil (6.4%),lymphocytes (43.2%), monocytes (20.3%),neutrophils (6.9%)and thrombocytes (23.2%).Based on the data obtained it can be concluded that the condition of fish from the Tapung River is healthy and the fish from Sail River is unhealthy. Keywords: erythrocytes,leukocyte,haematocrite, leucocrite
Carrying Capacity of Tepian Batu Lake Siak Hulu Sub District Kampar District Riau Province Based on Dissolved Oxygen Astria, Katarina Gita; Simarmata, Asmika Harnalin; Siagian, Madju
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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AbstractCarrying capacity is defined as the ability of aquatic environment to support the life of organisms in that area. A study aimed to determine the aquatic carrying capacity for aquaculture fishing. The carrying capacity was determined based on dissolved oxygen concentration. The research was conducted during June to July 2019 in Tepian Batu Lake. Water samples were taken in three stations, namely Station 1 (inlet area), Station 2 (middle of the lake), and Station 3 (the end of the lake).In each station there were 2 sampling sites, namely surface and in the 2 Secchi depth. Sampling was done four times, once/week. Water quality parameters measured were dissolved oxygen, temperature, transperancy, pH, carbondioxide. nitrate and phosphate concentration. Carrying capacity was analyzed using the Kartamihardja formula (1998). Result shown that DO concentration 3.96-5.36 mg/L at the surface; 3.13-4.37 mg/L at water column. Water quality parameters were as follows: transparency ranges from 56.5-63.75 cm, temperature 28.75-30.5oC, pH 5-5.5, carbondioxide 6-12 mg/L, nitrate 0.031-0.078 mg/L and phosphate 0.062-0.116 mg/L. Carrying capacity of Tepian Batu Lake is 1276 kg/year and number units can be operated is 12 units. The current number of floating cages (FNC) unit in Tepian Batu Lake is 25 units. Based on data obtained that number of floating cages in Tepian Batu Lake has exceeded the carrying capacity. Keywords : Carrying capacity, dissolved oxygen, and floating cages
Stomach Contens of Mystus nigriceps Valenciannes from the Tarai River, Tarai Bangun Village, Tambang Sub-Regency, Kampar Regency, Riau Province Rekana Choli Br S Colia; Deni Efizon; Efawani Efawani
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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AbstractMystus nigriceps is a type of freshwater fish that live in the Tarai river. This research aims to understand the stomach content of the fish. Samplings were conducted in the Tarai River, 5 times, once/2 weeks for a three months period. The fish was captured using nets, scoop nets and bamboo trap. The number of fish caught  was 102, but 4 fishes had empty stomach and they cannot be analyzed. The method used was gravimetric. Stomach content of the fish was analyzed as a basic to calculate the Preponderance index (PI). Results shown that the main food of the fish from Tarai River was insect (PI 71.93%), the complementary food was fish (PI 6.06%) and unidentified materials (PI 13.46%) and the additional food was plant (PI 1.36%), crustaseans (1.51%) and domestic waste (1.57%). Based on data obtained, Mystus nigriceps can be categorized as carnivore. Keyword: Catfish, Feeding Habit, Index of Preponderance, Carnivore fish
THE EFFECT OF HCl CONCENTRATION ON THE SOAKING OF BROWN SEAWEED (Sargassum plagyophyllum) ON THE CHARACTERISTICS OF SODIUM ALGINATE Tedy Kamal Sumannag; Rahman Karnila; Edison Edison
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACTThis study was aimed to determine the effect of HCl concentration on the soaking of brown seaweed Sargassum plagyophillum as a supporting material during extraction. The research method used was an experimental method that carried out alginate extracts from seaweed Sargassum plagyophylum by giving immersion treatment of HCl solution with different concentrations consisting of A0 (0% HCl); A1 (0.3%HCl); A2 (0.4%HCl); and A3 (0.5% HCl). The design used was a Completely Randomized Non-Factorial Design (CRD) with 3 replications. The analysis was measure for a yield, water content, ash content, and viscosity. The best result from this study was A3 treatment, wherein the value of the yield, moisture content, ash content, and viscosity were 14.52%, 14.23% 22.19% and 2.57cps, respectively. Keywords: HCl, Sargassum plagyophyllum, seaweed, viscosity
Comparative study on reproductive biology of Ompok hypopthalmus from the Kampar Kiri and Kampar Kanan Rivers, Kampar Regency, Riau Province Betsyeba Yunita Siregar; Windarti Windarti; Deni Efizon
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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ABSTRACT Comparative study of reproductive biology Ompok hypopthalmus from the Kampar Kiri and Kampar Kanan Rivers has been conducted on April-May 2018. As there are differences on water condition and water quality in the Kampar Kiri and Kampar Kanan Rivers, the biological aspects of the reproductive of O. hypopthalmus living in those areas might be different. Sixty one fishes (28 males and 33 females) were taken from the Kampar Kiri River and 54 fishes (29 males and 25 females) were collected from the Kampar Kanan River. Total length of the fishes captured in the Kampar Kiri River was 150-220 mm (males) and 158-235 mm (females), while those of the Kampar Kanan River were 132-242 mm (males) and 145-226 mm (females). Sex ratio of fishes in the Kampar Kiri was 1:1.2 and that of the Kampar Kanan was 1:1. All fishes captured shown trace of developing gonads. In all maturity levels, the GSI of fish from the Kampar Kiri River was higher than that of the Kampar Kanan River, they were 0.27-5.95% in the Kampar Kiri’s fishes and 0.84-5.43% in the Kampar Kanan’s fishes. The fecundity of the Kampar Kiri’s fishes also higher than that of the Kampar Kanan’s fishes, they were 2.488-14.927 eggs/fish in the Kampar Kiri’s fishes and 4.858-8.106 eggs/fish in the Kampar Kanan’s fishes. Egg diameter in the Kampar Kiri and Kampar Kanan River were similar, 0.70-1.50 mm. Based on data obtained, it can be concluded that the reproductive biology of the Kampar Kanan’s fishes was worse than that of the Kampar Kiri’s fishes.Keyword: Sex Ratio, Gonad Maturity Level, Gonad Somatic Index, Fecundity
Comparative Morphometric Rhizophora Apiculata Leaf And Fruit In Two Areas With Anthropogenic Activities Different In Pesisir Dumai Barat Kota Dumai ProvinsiRiau David Raymond Sianturi; Efriyeldi Efriyeldi; Aras Mulyadi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACTMorphometrics is a field that deals with variations and changes in the form (size and shape) of an organism or object. Anthropogenic is a human activity not only limited to the use or utilization of coastal resources, but also can be restorative and protective, thus causing complex disruption. The purpose of this study was to determine the morphometric differences of the leaves and fruits of R. apiculata mangroves in two regions with different anthropogenic activities in the mangrove ecosystem of Dumai City. This research was carried out in May 2019. From the results of the study it was found that in areas polluted by anthropogenic activity the average morphometrics of fruit (length and width) and leaves (length, width and length of the stems) Rhizophora apiculata were lower than those in the area not polluted by anthropogenic activity. At station I the oil content ranged from 1162.11 to 1934.2 ppm classified as polluted and at station II ranged from 672.81 – 1082.30 ppm classified as not polluted. The content of organic matter at station I ranged from 11.03 to 13.73%, which was classified as low, while at station II it ranged from 19.95 to 23.77% which was classified as moderate. Keywords:Dumai, Anthropogenic, Mangrove, Morphometric
SCHOOLING DETECTION OF PELAGIG FISH USING HYDROACOUSTIC METHOD IN TOBA LAKE, NORTH SUMATERA Syafri Riki; Alit Hindri Yani; Syaifuddin Syaifuddin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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ABSTRACT Schooling is the most important structure in the life of several pelagic fish populations. Pelagic fish can form a very large schooling so that it is one of the abundant fisheries resources in general waters (Welcome R. L, 2001). Because of this, fishermen can use the schooling to catch large amounts of pelagic fish. An effective method for detecting fish schooling is one of hydroacoustic methods. The purpose of this study was to detect pelagic fish schooling in Lake Toba waters in order to provide an accurate picture of the insitu conditions of the potential resources of Pelagic fish in Lake Toba. The data or material used in this study is the acoustic data of Lake Toba waters that have been recorded during the shipping period with a ship speed of 7-10 knots using a scientific echosounder biosonic DT-X Spilt Beam 200 kHZ. The results showed the distribution of pelagic fish schooling was detected at a depth of 5-110 meters as many as 36 fish schooling, the highest detected at depths of 1-10 meters as many as 11 fish schooling and the lowest 1 schooling at a depth of 50-60 meters. Based on time, the distribution of fish schooling in Lake Toba waters was detected at morning, afternoon and evening. In the morning 6 fish schooling were detected, noon 18 fish schooling and 12 fish schooling in the afternoon. Keywords: Detection, Schooling Fish, Hydroacoustic, Pelagic Fish  
EFFECT OF GIVING EARTHWORMS WITH DIFFERENT FREQUENCY ON GROWTH AND SURVIVAL RATE OF KOI (Cyprinus carpio) LARVAE Harlyanto Harlyanto; Nuraini Nuraini; Sukendi Sukendi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Email : Harlianto@gmail.comABSTRACKThis research was conducted in 28 January – 8 March 2019 at Fish Breeding Laboratory of Fisheries and Marine Faculty, University of Riau. This study aims to see the effect of giving earthworms with different frequencies to growth rate and survival rate of koi fish larvae. The method used in this study is the experimental method using a completely factor randomized design (CRD) and four treatments with three replications. The treatments applied in this study are: P3 = Giving earthworms 3 times a day at 08:00 am, 4:00 pm and 00:00 am,P4 = Giving earthworms 4 times a day at 08:00 am, 02:00 pm, 08:00 pm and 02:00 am, P5 = Giving earthworms 5 times a day at 08:00 am, 01:00 pm, 06:00 pm, 01:00 am and 06:00 am, P6 = Giving earthworms 6 times a day at 08:00 am, 12:00 pm, 04:00 pm, 08:00 pm, 00:00 am and 04:00 am. The results showed that the best frequencies of giving earthworms koilarvae are P3, with absolute weight growth 0,53 g, specific growth rates 6,62 %, absolute length growth 2,89 cm, and survival rate 80%. Temperatures range from 26-29oC, pH 6.4-7.1 and Dissolved Oxygen 4.2-5.2 mg/L. The value of this water quality has been with the standard of maintenance of koi fish.Keywords: Feed frequency, Larvae, Koi fish, Growth.
ANALYSIS OF THE CHEMICAL CONTENT OF HAIRY COCKLE (Anadara antiquata)MEAT Sayyidina Ahmad Zhariif; Rahman Karnila; Mery Sukmiwati
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACTShellfish is one of the soft animals (Mollusca) class Bivalvia or Pelecypoda. The shells used in this study are shells fleeceare widely used as an alternative food source. This study aims to determine the chemical content of shell fleece. The research method is an experimental method  in 2 stages, namely the preparation of samples of shell fleece and analysis of the chemical composition of shell fleece. Chemical composition analysis parameters consist of moisture, ash, fat, and protein content. The resultsshowed that the chemical content of shell fleece was 79% (ww), ash content 9.24% (dw), protein 45.52% (dw), and fat 36.08% (dw). Keywords: chemical of compotition, mollusca, protein

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