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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
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Dissolved Oxygen Based Carrying Capacity in the Sungai Paku Reservoir in the KamparKiri Sub-District, Kampar District, Riau Province Dewi, Afrila; Simarmata, Asmika Harnalin; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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 AbstractCarrying capacity is an ability of aquatic environment to support the life of aquatic organisms and it can be determined based on dissolved oxygen concentration. To understand the dissolved oxygen based carrying capacity in the Sungai Paku reservoir, a research has been conducted in June-July 2019. Water samples were taken in three stations, Station 1 (riverine zone), Station 2 (transition zone) and Station 3 in the floating cage area (lacustrine zone). In  each station, there were 3 sampling points, in the surface, in the 2 Secchi depth and in the 4 Secchi depth was done once/week. Water quality parameters measured were dissolved oxygen, CO2, pH, temperature, transparency, depth, nitrate and phosphate. Carrying capacity was then analyzed. Result shown that DO concentration was 4.60-5.88 mg/L, in the surface, 3.77-4.64 mg/L in 2 Secchi depth and 2.08-2.93 mg/L in 4 Secchi depth. Water quality parameters were as follows: depth was 4-6 m, transparency was 69.1-80.8 cm, temperature was 29-30oC, pH was 5, CO2 was 7.92-15.42 mg/L, nitrate was 0.075-0.140 mg/L and phosphate was 0.065-0.0134 mg/L. The dissolved oxygen based carrying capacity in the Sungai Paku Reservoir is 2,032 kg/year and the number of fish cage that can be placed in the dam was 8 units (5 x 5 x 3 m).Keywords :  Dissolved oxygen, Floating cage, Sungai Paku Dam, Water quality
The effectiveness of peat water media that is fermented slaughterhouse liquid waste for growing Spirullina sp. Ersyam, Taslima Fauzanah; Budijono, Budijono; Harahap, Sampe
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTSlaughterhouse liquid waste contains fair organic materials that can be used as nutrient source for growing  Spirulina sp. The purpose of this study was to determine the effect of fermented slaughterhouse waste as alternative nutrients for the growth of Spirulina sp. This study was conducted in September-October 2019. RAL method was applied with 5 different concentrations, there were 0 ml/4L (P0), 400 ml/4L (P1), 800 ml/4L (P2), 1,200 ml/4L (P3) and 1,600 ml/4L (P4), with 3 repetitions. Parameters measured were Spirulina sp. abundance, nitrate and phosphate content. Results shown that Spirulina sp. grow well in all treatments, except in control. The best result was provided by P3 (4,907 x 103cells/ml) that was achieved on the 9th day. Nitrate and phosphate content   decreased during the experiment, the nitrate was reduced by 5.2091 mg/L or 87.2 %, while the phosphate was reduced by 18.784 mg/L or 84.1 %. Based on data obtained, it can be concluded that the peat water can be enriched by addition of fermented slaughterhouse waste and it can be used as nutrients for growing Spirulina sp. Keywords: nutrient, liquid waste, microalgae, algae culture
Types and Density of Gastropods in Mangrove Ecosystem in Kampung Madong Tanjungpinang Kepulauan Riau Asri Mentari Nasution; Adriman Adriman; Nur El fajri
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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AbstractThis study aims to determine the type and abundance of gastropods in the mangrove ecosystem in Madong Village. This research was conducted in July 2019 which is located in Kampung Madong Tanjungpinang Kepulauan Riau. Gastropod sampling using the line transects method. At the research location, there were 3 stations and each station consisted of 3 quadrants measuring 1x1 m. The results of the study found 13 species of gastropods. The abundance of gastropod ranged from 41,111 – 150,000 organism/ha, diversity index values (H ') ranged from 0.699 – 3.454, dominance index (C) values ranged between 0.096 – 0.693 and uniformity index values ranged from 0.699 – 0.963. Differences in the value of density, diversity, dominance, and uniformity at each station caused by differences in mangrove conditions, substrates and activities community.Keywords: Gastropod Density, Mangrove Ecosystem, Substrate, Kampung Madong 
Carrying Capacity Assessment Based on Chlorophyll-a in the Putus Lake, Siak Hulu Sub-District, Kampar District Riau Province Ella Dabella Manja; Tengku Dahril; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTThe carrying capacity is defined as the ability of aquatic environment to support the life of organisms in that area. A study aimed to assess the aquatic carrying capacity for extensive fishing in the Putus Lake, Pangkalan Baru Village, Kampar District, Riau. The carrying capacity was determined based on primary productivity using chlorophyll-a concentration, which is indicating the existence of phytoplankton in waters.This research was conducted July, 2019. There were 3 stations namely station 1 (inlet area), station 2 (in the middle of lake) and station 3 (tip of lake). In each stations, there were 2 sampling sites, in the surface and in the middle of water column. Sampling was done four times, once week. Water quality parameters measured transparency, temperature, pH, dissolved oxygen, phosphate and nitrate concentration. Results shown that chlorophyll-a concentration: 10.87-13.19 µg/L, transparency: 66.6-74.2cm, temperature: 29-31 oC, pH: 5, dissolved oxygen: 3,72-5,32mg/L, phosphate: 0,03-0,05mg/L and nitrate: 0.02-0.04mg/L. The concentration of chlorophyll-a indicates that the carrying capacity of the Putus Lake for extensive fishing was 1.73 tons/year.Keyword: oxbow lake, extensive fishing, phytoplankton, water quality
Trophic State Waters of Kolong Tin Post Mining Based on Phytoplankton in Baran Timur Village Karimun Regency, Kepulauan Riau Province Bukit, Friska Lesmana Beru; Dahril, Tengku; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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Abstract There were many activites in kolong of tin post mining in Baran Timur Village, Karimun Regency, Kepulauan Riau Province, contributed organic and inorganic materials that influenced concentration of nutrient (N and P) in the water and affect phytoplankton abundance and finally trophic state of waters. This research aims to know the trophic state waters of kolong tin post mining in Baran Timur Village Karimun Regency Kepulauan Riau Province based on phytoplankton abundance. A research was conducted during July 2019.  There were three stations namely Station 1 (inlet area), Station 2 (in middle of kolong) and Station 3 (outlet area).  There were 3 vertical sampling points, in the surface, in 2 Secchi depth and in 4 Secchi depth. Sampling was done 3 times, once/week. Result shown the abundance of phytoplankton was 23,918–179,758 sel/L, concentration of nitrate 0.043-0.061 mg/L, phosphate 0.085-0.135 mg/L, pH 5, dissolved oxygen 4.10-6.91 mg/L, free carbondioxide 3.32-7.32 mg/L, temperature 30.3-310C, transparency 73.3-78 cm and depth4-7 m. Based on phytoplankton abundance, the trophic state waters of kolong tin post mining in Baran Timur Village Karimun Regency Kepulauan Riau Province was mesotrophic. Keyword: Trophic State, Phytoplankton, Kolong Tin Post Mining 
Types and Abundance of Periphyton in Glass Substrate in Lake Perupuk, Kampung Pinang Village, Perhentian Raja District, Kampar Regency, Riau Province Santun Tua Siburian; Asmika Harnalin Simarmata; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTPeriphyton is a microscopic organism that lives attached to a submerged substrate. This study aims to determine the trophic status based on periphyton on a glass substrate at Lake Perupuk conducted in June-July 2019. There are three sampling stations, namely S1 (at the inlet lake), S2 (in the middle of the lake). lake) and S3 (at the end of the lake). Sampling is done once / week for 3 weeks. Periphyton samples were brushed from glass substrate (8 x 3) cm2. The number of media in S1, S2 and S3 is 24 pieces each. Water quality parameters measured are brightness, temperature, pH, dissolved oxygen, free carbon dioxide, nitrate, and phosphate. The results showed that there were 29 types of periphyton found consisting of 5 classes, namely Bacillariophyceae (11 species), Chlorophyceae (7), Cyanophyceae (6 species), Zygnematophyceae (3 species) and Euglenaphyceae (2 species). The abundance of periphyton in the glass substrate at S1 on the surface was 8,763 cells / cm2, at S2 it was 11,939 cells / cm2 and at S3 on the surface was 21,339 cells / cm2. Water quality parameters are as follows: oxygen range: 5.32-6.40 mg / L, CO2: 5.99-15.98 mg / L, temperature: 28-30 0C, brightness: 44.3-49.3 cm, pH: 5, phosphate: 0.0125-0.0646 mg / L, nitrate: 0.0553-0.2146 mg / L. Data obtained shows that the quality of perupuk lake water is suitable to support periphyton life.    Keywords : Type and abundance, sessile organism, aquatic algae, glass 
Primary productivity Based on Oxygen Method in the Betung Lake Betung Village Pangkalan Kuras Sub-District Pelalawan District Riau Province Septriza Radella; Asmika Harnalin Simarmata; Tengku Dahril
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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AbstractPrimary productivity is the conversion of solar energy and nutrients to living biomass through photosynthesis. A research aimed to understand the primary productivity based on oxygen method was conducted in July-August 2019. There were three sampling stations namely Station 1 (inlet area), Station 2 (in the middle of the lake) and Station 3 (in the end of the lake). In each stations, there were 2 sampling point, in the surface (15 cm) and 2 Secchi (160 cm) depth. Sampling was done three times, once/week. Water quality parameters measured were temperature, pH, transparency, depth, dissolved oxygen, CO2, nitrate and phosphate concentration. Results shown that the temperature was 28.7-29 ºC, transparency was 81.3-84 cm, pH was 5, depth was 195-210 cm, DO was 3.87-6.12 mg/L, CO2 was 6.27-15.42 mg/L, nitrate was 0.0229-0.0405 mg/L, and phosphate was 0.0226-0.0406 mg/L. Primary productivity based on oxygen method in the Betung Lake was 158-349 gC/m3/Day and it can be categorized mesotrophic.  Keywords : Oxbow Lake, Photosynthesis, Water Quality, Nilo River,Transparency
COMPOSITION OF SURROUNDING NET CATCHES IN VILLAGE OF PASAR II WATERS, MANDAILING NATAL DISTRICT, NORTH SUMATERA PROVINCE Ali Basri Rangkuti; Arthur Brown; Isnaniah Isnaniah
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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AbstractThis research was conducted in September 2019 for 1 week in the waters of Pasar II Natal Village, Natal District, Mandailing Natal Regency, North Sumatra Province. The purpose of this study is to produce  data information about the composition of the basic lampara which is operated in the waters of the Pasar II Natal District of Natal District of Mandailing Natal. The method used in this study is a survey method, data obtained by fishing experiment using surrounding net which is operated by fishermen in the District of Natal Mandailing Natal seawaters, North Sumatra Province. The catch fishes are raised by fishermen ashore using a 30 kg basket. While the catch fish obtained during the research activities consists of red Lutjanus bitaeniatus, Doryteuthis pealeii, Rastrelliger faughni, Trichiurus lepturus, Eubleekeria splendens, Sardinella albella and Stolephorus indicus. Total catches obtained were 1876 kg with 819873 individuals. Actually,the target fish    Anchovies (Stolephorus indicus)  was caught with a total weight of 1696 kg with a percentage of 90.40% of the total weight of the catch fish. The number of anchovies obtained is 814080 or 99.29% of the total catch. The bycatch of fish obtained weighing 180 kg or as many as 5793 fishes. Keywords: Basic Attachment, Stolephorus indicus, Primary and Secondary
DISTRIBUTION OF HEAT WASTE IN TIDE ON THE PLTU AREA (THERMAL POWER STATION) SIRIH BAY, PADANG PROVINCE WEST SUMATERA Al Hamda, Teguh Cakra; Mubarak, Mubarak; Galib, Musrifin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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ABSTRACT The level of electricity usage needs continues to increase each year in line with increased economic growth. One of the technologies used in producing electricity is the PLTU (Thermal Power Station) where PLTU Teluk Sirih is the first PLTU in West Sumatra that has been operating since 2013 and has a capacity of 2x112 MW. The existence of a power plant in the waters of Sirih Bay is thought to affect the characteristics of these waters. This is because besides producing electricity, it also produces hot water waste from the process of absorbing hot steam that enters the coastal waters through the outlet channel. The purpose of this study was to determine the distribution process of hot water waste from PLTU Teluk Sirih at high tide and ebb with field data and hydrodynamic modeling of waters, as well as sea surface temperature observation data at 16 sampling points. Verification of field data and hydrodynamic models has a Root Mean Square Error (RMSE) value of 5.74% (e = 0.015). The pattern of ocean circulation in the waters of the Sirih Bay Coast is mainly controlled by the tidal force, where the flow pattern at the time of the tides goes northeast with some moving towards the southwest. Observations show the temperature of the waste of hot water in the outlets until the sea in front of them is recorded between 32 °c to 35 °c. Horizontally, the delusional zone of the waste heat reaches a radius of 500 m from the mouth of the outlet where the waste heat occurs more broadly during low tide conditions. Keywords : PLTU Teluk Sirih, Heat Waste, Hydrodynamic Model
SELECTIVITYBOTTOM GILLNET AT DESA NARAS 1 KECAMATAN PARIAMAN UTARA PARIAMAN CITY PROVINSI SUMATERA BARAT Maisuri Dewi; Alit Hindri Yani; Nofrizal Nofrizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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 ABSTRAKPariaman City is a coastal and marine area, where fish products have an important role in the economic cycle, one of which is in Naras Village 1. This study aims to determine the selectivity of mesh size on the composition and size of catches on gill net. The method used in this study is experimental fishing, a method that uses a sample of objects to be observed. The results of this study indicate that there are 9 species of fish caught on a mesh size of 1.5 inch and 1.75 inch,kurisi (Nemipterus hexodon), barakuda (Sphyraena barracuda), mojjaras (Eucinostomus),selar kuning (Selaroides leptolepis), beloso (Saurida tumbill), parang-parang (Chirocentrus nudus), kembung (Rastrelliger spp), tenggiri (Scomberomorus commersoni), and kaci-kaci (Painted sweetlips). Dominant fish caught in both mesh sizes are 320 fish kurisi or 41% of the total catch, with a total length of 13.5 - 25.7 cm, fork length 11.5 - 23.2 cm, height 3 , 2 - 5.6 cm and weigh 40 - 170 g. Difference in mesh size that is not too large only gives a slight effect both on the total number of catches and the average fork length of fish caught. The most selective basic gill nets are gill nets with a mesh size of 1.75 inches, this is because the mesh size of 1.75 inches only catches large-sized fish that are worth catching and can pass small fish. Keywords: selectivity, bottom gillnet, fish kurisi,naras 1 village.

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