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All Journal Jurnal Perikanan dan Kelautan Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Jurnal Akuatika Indonesia
Madju Siagian
Dosen Pengajar Jurusan Manajemen Sumberdaya Perairan Fakultas Perikanan dan Ilmu Kelautan Universitas Riau
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Social Sciences

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Chlorophyll-a Concentration in The Sepinang Lake, Pangkalan Serik Village, Siak Hulu Sub-District, Kampar District, Riau Province. M Sinaga, Saut; Siagian, Madju; Dahril, Tengku
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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AbstractMany activities arround Sepinang Lake contributes the input of organic and anorganic matter that influence the water quality, especially nutrient concentration in the water. This research was conducted of March – April 2018 in the Sepinang Lake and aims to understand the concentration of chlorophyll-a in the lake. Chlorophyll-a samples were collected from 3 stastions. In each stations there were two sampling sites, in the surface and 2 secchidepth. Sampling was done three times, once a week. Result shown that the chlorophyll-a content ranged from 4.32 µg/L – 9.24 µg/L. Based on the chlorophyll-a concentration, the Sepinang Lake can be categorized as mesotrophic to eutrophic. Water quality parameters values were temperature  30.6 0C - 31.50C, transparency 49.3 cm – 62.8 cm, depth 211 cm – 223.6 cm, DO 4.22 – 5.58 mg/L, CO2 9.32 – 15.98 mg/L  nitrate 0.065 -  0.231 mg/L, phosphate 0.089 – 0.135 mg/L and pH 5.2 – 5.6.Keywords : mesotrophic, water quality, oxbow lake
Type and Density of Zooplankton in The Sepinang Lake Pangkalan Serik Village, Siak Hulu Sub District, Kampar District, Riau Province D Kusumawati, Yuliana; Siagian, Madju; Simarmata, Asmika Harnalin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract There were several human activities around the Sepinang Lake that contribute the input of organic and anorganic matter and thus influence the type and density of zooplankton. To understand the types and density of zooplankton in the Sepinang Lake, a research has been carried out in March-April 2018. There were three sampling points, namely in the inlet, in the middle of the lake, and in the end of the lake. In each sampling point, the water was sampled from the surface and 2 Secchi depth. Sampling were conducted 3 times, once/week. Water quality parameters measured were temperature, transparency, dissolved oxygen, pH,nitrate and phosphate. Results shown that there were 19 species of zooplankton present and they were belonged to 7 classes, namely Cladocera (2 species), Monogononta (9 species), Crustacea (3 species), Copepod (1 species), Ciliate (2 species), Sarcodina (1 species) and Eurotatoria (1 species). The zooplankton density in the Sepinang Lake was 2,448-3,808organisms/L.The most commontype of zooplankton present in the Sepinang Lake was Ciliate.Water quality parameter values are as follow,  temperature was 30.7-32.0oC, transparency was 49.3-62.8 cm, dissolved oxygen was 4.22-5.58 mg/L, pH was 5.33-5.60, CO2was 9.32-15.98 mg/L, nitrate was 0.07-0.23 mg/L and phosphate was 0.09-0.28 mg/L. Based on the type and density of zooplankton present, it can be concluded thatthe Sepinang Lake can be categorized as oligothropic. Keywords : Kampar River, Oxbow Lake, Eutrophic, Ciliate.
Trophic Status of the Koto Tibun Reservoir, Kampar District, Riau Province Based on Trophic State Index Sitorus, Rike Yance; Simarmata, Asmika Harnalin; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract            Koto Tibun reservoir received organic and anorganic materials from the Tibun River. The impact of continous materials input caused enrichment of nutrient in the waters. This research aims to understand the trophic status of the Koto Tibun Reservoir based on trophic state index and it was conducted in February-March 2018. There were three stations namely, station 1( riverine zone), station 2 (transition zone) and station 3 (lacustrine zone). Samples were taken once/week for a 3 week period. Water quality parameters measured were total phosphorus, chlorophyll-a, transparency, temperature, pH, dissolved oxygen and nitrate. Result shown that total phosphorus was 144.94-192.48 µg/L, chlorophyll-a 3.10-3.98 µg/L, transparency 0.75-0.79 m, temperature 25.3-25.6 oC, pH 5, dissolved oxygen 4.78-5.62 mg/L and nitrate 0.186-0.193 mg/L. The TSI value (60.3-62.35) indicate that the Koto Tibun reservoir can be categorized as eutrophic. Keyword : Koto Tibun Dam, Water Quality, Trophic Status, Eutrophic
Limnological Condition of Akap Reservoir, PayungSekaki District, Pekanbaru Basedon Physical and Chemical Parameters Mandasari, Ayu Defi; 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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ABSTRACTAKAP Reservoir was built to store excess water during the rainy season and as a recreation destination. A research aims to understand the limnological condition in the AKAP Reservoir based on physical-chemical parameters was conducted from March-April 2018. There were 4 sampling stations, namely Station 1 (inlet), Station 2 (in the middle of reservoir), Station 3 (in the middle of reservoir) and Station 4 (outlet). The water samples were taken once/week for a 3 weeks period. Water quality parameters measured were temperature, transparency, velocity, depth, water inflow, water level, pH, DO, CO2 free, nitrate and phosphate concentration. Results shown that the temperature was 29-300C, transparency 25.7-30.33 cm, depth 1.63-2.53 m, velocity 0.79-1.1 m/s, water inflow 0.26-0.31 m3/s, water level 86.3-116.7 cm, pH 5, DO 2.94-3.27 mg/L, CO2 free 7.99-11.98 mg/L, nitrate 0.04-005 mg/L, phosphate 0.06-0.09 mg/L. Based on the nitrate and phosphate concentrations, AKAP Reservoir can be categorized  as oligotrophic-mesotrophic.Keywords : AKAP Reservoir, Water Quality, Oligotrophic, Mesotrophic
Fertility Statusof the Koto TibunReservoir, Kampar Regency, RiauBased on NygaardIndex Nainggolan, Dorma Abigail; HSimarmata, Asmika; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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AbstractNygaardindex is an index which can be used to determine the trophic status of waters, based on phytoplankton composition. To understand the trophic status of the Koto Tibun Reservoir, a research was conducted on February-March 2018. There were three sampling station, namely station 1 (riverin zone), station 2 (transition zone) and station 3 (lacustrin zone). Samplings were conducted 3 times, once/week. Water quality parameters measured were temperature, pH, free CO2, nitrate and phosphate. Results shown that the Nygaard Index values ranged from 2,4-3. The water quality parameters were as follows : temperature : 25.3-25.60C, transparency 75-79 cm, pH 5, free CO2 : 18.64-19.44 mg/L. Based on the Nygaard Index value, the Koto Tibun reservoir can be categorized as mesotrophic to eutrophic. Keyword :Phytoplankton, Koto Tibun Dam, Water Quality Parameters, Mesotrophic 
Trophic State of The Perupuk Lake in Kampung Pinang Kampar Regency Riau Province Based on Nygard Index Simanjuntak, Taruli Septiana; H Simarmata, Asmika; 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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Abstract Nygard Index can be used to determine the trophic state of waters. Calculation of this index is based on the number of phytoplankton species that are belonged to these following groups, namely  Chlorococcales, Myxophyceae, Centric diatom, Euglenophyceae, and Desmidiaceae. To understand the trophic state of the Perupuk Lake, a research has been conducted in June-July 2019. There were three sampling stations, namely station 1 (in the inlet from the Kampar River), station 2 (in the middle of the lake) and station 3 (in the end of the lake). In each station there were two sampling points, in the surface and in the middle of water column. Sampling were conducted 3 times, once/week. Water quality parameters measured were phytoplankton type, transparency, temperature, pH, nitrate, phosphate, dissolved oxygen and free carbon dioxide. Results shown there were 18 species of phytoplankton present, namely Chlorococcales order (5 species), Myxophyceae (4 species), Centric diatom order (3 species), Euglenophyta Division (1 species) and Desmidiaceae (5 species). Water quality parameters were as follows: transparency 44.3-49.3 cm, temperature 28.3-300 C, pH 5, nitrate 0.11-0.17 mg/L, phosphate 0.02-0.04 mg/L, dissolve oxygen 5.07-6.40 mg/L, and  free carbon dioxide 7.3-14.6 mg/L. Nygaard Index value of the Perupuk Lake range 1.75-2.5 and it can be  categorized as mesotrophic.Keywords: Trophic State of lake, phytoplankton, mesotrophic, water quality.
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
Chlorophyll-aConcentration in Waters in the Riau University area, Pekanbaru, Riau Province Lubis, Helfrida; H. Simarmata, Asmika; Siagian, Madju
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT             In the Riau University area there are several shallow waters. Activities conducted   around the waters may contribute the input of organic and inorganic pollutant into the waters. The pollutant may increase the fertility of the water and it is reflected in the concentration of chlorophyll-a content in the water. A research aims to determine the aquatic productivity based on chlorophyll-a concentration, has been carried out in March-April 2018.  Sampling was carried out in three stations, namely stations 1 (around the LPPM   building), station 2 (in the front of the   Rectorate building), and station 3 (in the Fisheries Faculty reservoir). Water quality parameters measured were temperature, pH, transparency, DO, CO2, nitrate and phosphateconcentration. Samplings were conducted three times, once/week. Results shown that the chlorophyll-a concentration ranged from 4.04-5.12µg/L, temperature 30-310C, transparency 34-84 cm, depth 116-209 cm, DO 4.96-5.64 mg/L, CO2 14.64-17.31 mg/L, Nitrate 0.05-0.06 mg/L, phosphate 0.07-0.19 mg/L, and pH 6. Based on the chlorophyll-a concentration, the water of the waters in the Riau University area   can be categorized as mesotrophic. Keywords: mesotrophic, water quality,reservoir FPK, organic matter, aquatic productivity
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
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 
Co-Authors Asmika Harnalin Simarmata Astria, Katarina Gita Br. Allagan, Desima Kristina Bukit, Friska Lesmana Beru Clarissa, Enny Clemens Sihotang D Kusumawati, Yuliana Dasti Janarko Putra, Dasti Janarko Dewi, Afrila Fadilah, Nisa Wangi Tresna Gaol, Melinda Juliana Lumban Indra R. Simangunsong, Indra R. Intan S, Yeni Debora Krismanto Viade Nababan Lubis, Helfrida M Silalahi, Dio M Sinaga, Saut Mandasari, Ayu Defi Maria Virgita Sihaloho, Maria Virgita Nainggolan, Dorma Abigail Nengsi, Agustina Surya Olivia, Reyka Kristin Perawati Sartika Lumbangaol Radieka Febyando, Radieka Rodo Sinatra Nababan, Rodo Sinatra S Sinaga, Jefri Daniel Siahaan, Oloan Sihombing, Susi Silaen, William Fransisco Simanjuntak, Taruli Septiana Sitorus, Rike Yance Tengku Dahril, Tengku Walmon Sinaga Yunita, Sarah Amelia Zein Lubis, Solat Adawiyah