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Extensive fishing Carrying Capacity oftheFPK Reservoir, Riau University Based on Chlorophyll-a Ayunanda Mustika Sari; Asmika Harnalin Simarmata; 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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ABSTRACT               Carrying capacity is defined as the ability of aquatic environment to support the life of organisms in that area. A study aims to assess the extensive fishing carrying capacity of the FPK reservoir based on primary productivity (chlorophyll-a content), has been conducted in November-Desember 2018. There were 3 stations, namely Station 1 (inlet area), Station 2 (in the middle of the reservoir) and Station 3 (outlet area). Water quality parameters measured were temperature, transparency, pH, dissolved oxygen, CO2, nitrate, phosphate, and chlorophyll-a concentration. The concentration of chlorophyll-a indicates that the extensive fishing’s carrying capacity of the reservoir was 0.31 tons/year. Water quality parameters were as follows: transparency ranges from 66.7-106.8 cm, temperature   28-29°C, pH 6, dissolved oxygen 2.52-2.66 mg/L, free CO2 6.7-9.83 mg/L, nitrate 0.3667-0.4118 mg/L, phosphate 0.2080-0.2154 mg/L, and concentration of chlorophyll-a was 12.78-15.96 µg/L. Keywords:Carrying capacity, Produktivitas Primer, Fitoplankton, Reservoir, Water quality
Trophic State of The Lubuk Siam Lakes, Siak Hulu District, Kampar RegencyBased on The TSI (Trophic State Index) Rensi Adolina Damanik; Clemens Sihotang; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract            TSI is one of methods used to determine the trophical state of waters. The TSI was calculated  based on physical, chemical and biological parameters and it is more representative for analyzing the trophical state of waters.This research was conducted in February-March 2017 and it aims to understand the trophic state of the Lubuk Siam lake.  There were three sampling stations namely Station 1 (inlet), Station 2 (pen cage area ), and Station 3 (outlet). In each station, there were three sampling points, in the surface (50 cm), 2 secchi depth (150 cm) and 3 secchi depth (220 cm). Samplings were done once/week for 3 weeks period. Water quality parameter measured were chlorophyll-a, total phosphorus, transparency, temperature, pH, nitrate, and free carbondioxide. Trophic status was calculated based on Carlson’s Trophic State Index (TSI). Result  shown that the transparency was 63-89cm, totalphosphorus 0.01–0.23 mg/L, chlorophyll-a 10.27-72.52µg/L, depth 300-700 cm, temperature 27.6-31.1 oC, pH 6.7-7.5dissolved oxygen 4.098-8.264 mg/L,free carbondioxide 3.902 – 15.981mg/L andnitrate 0.054-0.241 mg/L. Based on Carlson’s TSI value, the Lubuk Siam Lake can be categorized as mesotrophic to light eutrophic. Keywords : Lubuk Siam, Lakes, TrophicState Index, Water Quality 
The Dynamics of Fitopankton Abundance Lake Tepian Batu Teratak Buluh Village, Kampar Regency Riau Province Magdalena Fitriani Daeli; Madju Siagian; 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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                                           Abstract The research of phytoplankton abundance dynamics conducted in June-July 2019 at Lake Tepian Batu. A study aims to know the dynamics of phytoplankton abundance. There were 3 stations namely stasion 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 and 2 Secchi depth. Sampling was done 4 times, once/week. Water quality parameters measured were temperature, pH, transparency, dissolved oxygen, free carbondioxide, nitrate, phosphate.Result shown that, temperature 28.75-30.50C, pH 5-5.5, transparency 56.5-63.7 cm, DO 3.13-5.35 mg/L, CO26.00 -12.99 mg/L, nitrate 0.031-0.075 mg/L, phosphate 0.062-0.116 mg/L, phytoplankton abundance at the surface range106,990-258,422 cell/L, and 2 Secchi depth range101,229-153,901 cell/L. Temporal and spatial dynamics of phytoplankton at Lake Tepian Batu were influenced of water quality dynamics such as transparency, nitrate and phospate concentration. Keywords:Dynamics, Phytoplankton, Water Quality, Lake Tepian Batu
The vertical profile of chlorophyll-a in pinang dalam lake Buluh cina village siak hulu subdistrict kampar district Riau province Arum Fuji R Manurung; Madju Siagian; Clemens Sihotang
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research has been done in the Pinang Dalam Lake Buluh Cina Village SiakHulu Subdistrict Kampar District Riau Province. This research aims to understand thevertical profile of chlorophyll-a in this lake. The research used survey method. Thechlorophyll-a samples were collected from three station namely station I at inlet of lake ,station II in the midle of lake and station III the end of lake. There were three samplingsites in each station were in the surface, 1.5 Secchi depth and 2.5 Secchi depth. Samplingwas done three times, once a week. The result shown chlorophyll-a concentration insurface :17.26 μg/L -21.44 μg/L, 1.5 secchi depth 11.60 μg/L-14.43 μg/L and in 2.5 secchidepth 9.98 μg/L - 12.41 μg/L. A chlorophyll-a concentration in surface higher than in the1.5 secchi depth and 2.5 secchi depth. The chlorophyll-a concentration decrease with thedepth. Water quality result shown pH:5; DO: 2.60-5.88 mg/L; CO2: 6.79-13.31 mg/L;nitrate: 0.0134-0,093 mg/L; phosphate: 0.03-0.15 mg/L; phytoplankton abundance:3,420,423-4,293,075 cell/L; depth: 180.67-429 cm; transparency: 52.5-54.5 cm;temperature: 28oC-28.34oC. Based on data obtained, it can be concluded the consentrationof chlorophyll-a in Pinang Dalam Lake showed the trophic status was mesotrophic and allwater quality still support the life of aquatic organisms.Keywords : Chlorophyll-a, the vertical profile, Pinang Dalam Lake
Trophic status of the Bandar Kayangan Lembah Sari Reservoir, Rumbai Pesisir Sub-district, Pekanbaru Based on Nitrate and Phosphate Concentration Berton Panjaitan; Asmika Harnalin Simarmata; Madju Siagian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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as a basis to determine the trophic status of the waters. A research aims tounderstand the trophic status of the waters of the Bandar Kayangan Lembah Sarireservoir was conducted in Mach-April 2016.There were 4 stations, namely St 1 (in theinlet from Ambang River), St 2 (in the inlet from Merbau River), St3 (in the middle ofthe lake) and St 4 (in the dam). Samplings were conducted 3 times, once/ week. Watersamples were taken from the water surface.Results shown that nitrate concentration was ranged from 0.075 – 0.096 mg/L,phosphate from 0.208 – 0.293 mg/L, temperature 31-32°C, transparency 56.8 – 60.2 cm,depth 219.3 – 378.7 cm, velocity0.25 – 0.40 cm/s, pH was4, dissolved oxygen (DO)5.38 – 8.31mg/L. Based on nitrate concentration, the trophic status of the BandarKayangan Lembah Sari reservoir was categorized as oligotrophic, whereas based onphosphate concentration, it can be categorized as eutrophic.Keyword: trophic status, nitrate, phosphate, Bandar Kayangan Lembah Sari lake
Study of Periphyton on Glass Substrates in Sago River Pekanbaru Prian Mintaito Simangunsong; Madju Siagian; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Periphyton is a group of microorganism that grow in some natural substrates such as rock, wood, plants and aquatic animals.A research aims to understand the type and abundance of periphyton in the Sago River has been carried out in April-May 2015. Samples were taken from three station, once/ week for a 4 weeks period. Type of periphyton was identified based on Prescot (1974), and Yunfang (1995). Result shown that there are 39 types of periphyton and they are belonged to 8 classes, namely Bacillariophyceae (13 species), benthic Crustacean (1 species), Chlorophyceae (6 species), Cyanophyceae (8species), Cryptophyceae (3species), Dinophyceae (4species), Euglenophyceae (2 species) and Xanthophyceae (2 species).The abudance of periphyton in the all station Sago River is significantly different, there were S1 (7,533cells/cm2), S2 (10,206cells /cm2), and S3 (13,277cells /cm2). The abundance of periphyton in the Sago River in general was around 7,533– 13,277 cells /cm2.Keywords: Sago River, Periphyton, Glass Substrates
Carrying Capacity for Extensive Fishing Based on Chlorophyll-a in The Tuok Tonga Lake, Buluh Cina Village, Siak Hulu Sub District, Kampar District, Riau Province Yeni Handayani; Madju Siagian; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
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AbstractCarrying capacity is defined as the ability of aquatic environment to support the life of organism in that area. A study aimed to assess the aquatic carrying capacity based on chlorophyll-a for extensive fishing in the Tuok Tonga Lake, Buluh China Village,Siak Hulu Sub District, Kampar District, Riau Province.The carrying capacity was determined based on primary productivity using chlorophyll-a concentration, which is indicating the existence of phytoplankton in the water. This research was conducted in June-July 2019. There were 3 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 two sampling point, in the surface and in 2 Secchi depth. Sampling was done three times once/week. Water quality parameters measured were chlorophyll-a, temperature, transparency, depth, pH, dissolve oxygen, CO2, nitrate and phosphate. Results shown that chlorophyll-a: 14.03-17.07 μg/L, transparency: 61.7-62.3 cm, temperature: 29.3-31oC, depth: 125-284 cm, pH: 5, dissolved oxygen:  3.37-4.94mg/L, CO2:5.32-11.98mg/L, nitrate: 0.02-0.08 mg/L and phosphate: 0.04-0.1mg/L. Based on concentration of chlorophyll-a indicates that the carrying capacity of the Tuok Tonga Lake for extensive fishing was 0.85 tons/year.Keywords: Oxbow lake, Primary productivity, Water quality
Trophic State of The Lubuk Siam Lake, Siak Hulu Sub-disctrict, Kampar District Based on Trophic Index (TRIX) Yohana Nelly Destina Siboro; Madju Siagian; Tengku Dahril
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Abstract             There are several human activitiessuch as agriculture and palm plantation are conducted around the Lubuk Siam Lake and thus the remains of fertilizer may enter to the water and affects trophic state in general. To understand the trophic state of the Lubuk Siam Lake’s watersbased on Vollenweider’s Trophic Index (TRIX), a research was conducted in February - March 2017.There were 3 sampling stations namely Station 1 (inlet area), Station 2 (the middle of the lake), and Station 3 (outlet area). In each station there were 3 sampling points, in the surface (50 cm), 2 Secchi depth (126 cm) and 3 Secchi depth (189cm). Sampling were conducted 3 times, once/week. Water quality parameters measured were DIN (Dissolved Inorganic Nitrogen), total phosphorus, dissolved oxygen, chlorophyll-a, transparency, temperature and pH.Results shown that the transparency was 63 – 89 cm, temperature 28.5 – 30.530C, pH 6.83 – 7.27, total phosphorus 0.02 – 0.08 mg/L, DIN  0.45 – 0.73 mg/L, chlorophyll-a12.76 – 44.86 mg/m3, oxygen saturation 52.78%– 103.29%. The TRIX value indicates that the Lubuk Siam Lake can be categorized as mesotrophic to hypereutrophic. Keywords : Water quality, Trophic state, Lubuk Siam Lake, TRIX
Trophic State of The Sepinang Lake, Pangakalan Serik Village, Kampar Distric, Riau Province, Based on Nygaard Index. Esmi Yanti br Sinaga; Madju Siagian; Asmika H Simarmata
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             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, Euglenophyceae, Centric diatom, Myxophyceae and Desmidiaceae. To understand the trophic state of the Sepinang Lake, a research has been conducted  on March – April 2018. There were 3 sampling points, namely in the inlet, in the middle of the lake and in the end of the lake. In each sampling point, water samplet from the  surface and 2 secchi depth. Sampling was done three times, once/week. Water quality parameters measured were phytoplankton, transparency, temperature, pH, nitrate, phosphate, Disolved oxygen and free carbondioxide. Results shown that there were 48 species of phytoplankton present, namely Desmidiaceae (10 species), Euglenophyceae (10 species), Chlorococcales order (14 species), Centric Diatom (5 species), and Class Mixophyceae (1 species). The water quality parameters were as follows: transparency49,3-63 cm, temperature 30,6–32,00;, pH 5.33-5.53, nitrate 0,08-0,17 mg/L, phosphate 0,10-0,18 mg/L, dissolved oxygen 4,63-5,04 mg/L, free carbon dioxide 11.32-13.32 mg/L. Nygaard Index value of the Sepinang Lake was 1.8-2.5, indicates that the Sepinang Lake is mesotrophic to eutrophic. Keywords : Oxbow Lake, Phytoplankton, Mesotrophic, Eutrophic.
Relationship between Nitrate and Phosphate with Phytoplankton Abudancein the Inundation of PLTA Koto Panjang Reservoir Batu Bersurat village, XIII Koto Kampar Districts, Kampar Regency, Riau Province Dameyana S.C Lumban Tobing; 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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AbtractMany activities in the inundation of PLTA Koto Panjang Recervoir Batu Bersurat Village contributed organic matter that affect nitrate and phosphate concentration in water and increasing the abudance of phytoplankton. Aresearch  aim  to know the relationship between nitrate and phosphate with phytoplankton abudance in the inundation of PLTA Koto Panjang and it was conducted in June-July 2019. There were three sampling stations, namely Station I (tourisms and palm’s plantation), Station II (there were restaurant and trees around of station) and Station III (floating cage). In each station, there were three sampling points, in the surface (15 cm), in 2 Secchi depth (330 cm), and in 4 Secchi depth (660 cm). Sampling were conducted 4 times, once/week. Water quality parameter measured were nitrate, phosphate, phytoplankton abudance, transparency, temperature, pH, dissolved oxygen, free carbondioxide and BOD5 (Biochemical Oxygen Demand). The result shown: nitrate 0.06-0.08 mg/L, phosphate 0.05-0.09 mg/L, phytoplankton abundance 123,877-169,428 Cells/L, dissolved oxygen 6.35-6.88 mg/L, free carbondioxide 5-12.99 mg/L, temperature 29-31 oC, transparency 145.1-187.5 cm, pH 5-5.3 and biochemical oxygen demand (BOD5)4.03-8.90 mg/L. The relationship of nitrate and phosphate  with phytoplankton abudance was very strong.Keywords:Kampar River, Floating Cage, Organic Matter, Water Quality, Mesotrophic
Co-Authors Abdi Doly Tarigan Adithia Netanyahu Purba Agfin Septian Yogi Pratama Agung Prabowo Amat M. Siregar Amat Marustar Siregar Annisa Amaliah Artauli Sigalingging Arum Fuji R Manurung Asmika Harnalin Simarmata Asmika Simarmata Aspi Mardhana Ayunanda Mustika Sari Azmudin ' Berton Panjaitan Clemens Sihotang Cristy Artha D Sinurat Dameyana S.C Lumban Tobing Diah Sari Ninggrum Dio M Silalahi Erwin David Sianipar Esmi Yanti br Sinaga Ester Romastika Turnip Farida Sri Indah Fella Ferdiana Friska Junita Sirait Hosianna Sitorus Julianti ' Lauri Sahat Parulian M Leonardo Windra Sinurat Magdalena Fitriani Daeli Meria Ulfa Muhammad Ichsan Mulyadi Muhammad Zaki Mujahidah Ulya Mustika Firdaus Muzdalifah ' Natasya Margareth Pasaribu Naziruddin Naziruddin Nitami S.M Sihombing Prian Mintaito Simangunsong Rahmi Hidayana Hasibuan Rati Muspa Rensi Adolina Damanik Rina Maria Rusmala Sari Santo Rio Pakpahan Santun Tua Siburian Satria Yunda Sistim Wehalo Sudirman Sihombing Tengku Dahril, Tengku Valentina Manurung Yeni Handayani Yohana Nelly Destina Siboro Yudi Asriansyah Yuni Rahayu Zaini Hafiz Zurkartika '