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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
 260   261   262   263   264 
The Dynamics of Phytoplankton Abundance Lake Bunter Pangkalan Baru Village Siak Hulu Sub District Kampar District Riau Province Muhammad Edom Rifai; Tengku Dahril; Asmika Harnalin Simarmata
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTResearch onthe dynamics of phytoplankton abundance was conducted in July-August 2019 at Lake Bunter Pangkalan Baru village. A study aims to know the dynamics of phytoplankton abundance either spatiallyand temporally. 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 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 carbon dioxide, nitrate, phosphate. Result shown that temperature 29-32oC, transparency 81-90 cm, pH 5, DO 3.42-8.22 mg/L, CO2 3.99-15.98 mg/L, nitrate 0.022-0.089 mg/L, phosphate 0.014-0.049 mg/L. Phytoplankton abundance at the surface range 317,746-411,070cell/L, and 2 Secchi depth range 284,416-311,080cell/L. Temporal dynamics of phytoplankton abundance was influenced by timewhile spatial dynamics of phytoplankton abundance based on stations or depth. The dynamics of phytoplankton abundance, either spatially and temporally was influenced by water quality such as transparency, nitrate and phosphate.Keywords:Temporal, Spatial, Water Quality, Depth
Growth rate and mortality of selais fish (Ompok hypophthalmus) in the waters of the Indragiri River Lubuk Terentang Village, Gunung Toar District, Kuantan Singingi Regency, Riau Province Intan Nikita Syailta Yenti; Eni Sumiarsih; Nur El Fajri
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 2 (2021): Edisi 2 Juli s/d Desember 2021
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Abstrack        Ompok hypophthalmus is one of the caught fish commonly found in the Indragiri River, Lubuk Terentang Village. The purpose of this study was to determine the rate of growth and mortality of Ompok hypophthalmus. Fish sampling was carried out for 10 days in February and 10 days in March by using drift nets and nets. Data were analyzed by ELEFAN I method, FiSAT II software (FAO-ICLARM Fish Stock Assessment Tool). There were 109 fish caught. The results showed that the growth pattern of fish was negative allometric. Long frequency distribution ranges from 150 to 261 mm. The results of the Von Bertalanffy growth equation show that Lt = 260.40 (1-e-1,2(t+0.073)). This means the asymptote length (L∞) of the hypophthalmic is 260.40, the growth coefficient (K) 1.2 per year and the theoretical age (t0) of fish is equal to 0.073. The total mortality (Z) of fish is 1.88 per year. The estimated natural mortality (M) of fish is 1.09 per year and deaths due to capture (F) of 0.79 per year. The exploitation rate (E) of fish is 0.42 and shows this value is still below the optimum exploitation rate of 0.50.Keywords: Selais Fish, Ompok hypophthalmus, Growth Rate, Mortality, Indragiri River, Lubuk Terentang Village        
IMPROVEMENT OF WATER HYACINTH LEAFES MEAL (Eichhornia crassipes) FERMENTED WITH COW RUMEN LIQOUR AS FEED INGREDIENTS FOR JELAWAT(Leptobarbus hoeveni) SEEDS Sella Nur Happy; Indra Suharman; Adelina Adelina
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 1 (2021): Edisi 1 Januari s/d Juni 2021
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ABSTRACT        The research was conducted from August to December 2018. The research aims to evaluate improvement of the quality of Water Hyacinth Leaf Meal (WHLM) (Eichhornia crassipes) fermented with cow rumen liqour (CRL) as feed ingredients for jelawat (Leptobarbus hoeveni) seeds. The research was conducted in three stages. First stage: CRL activated with and without carbon as a WHML fermenter. The WHML proximate test results showed that the best treatment was CRL with the addition of carbon which produced 16.66% protein, 2.26% fat, 19.5% crude fiber and 13.44% ash. Second stage: CRL with the addition of carbon is used in different doses, by adding CRL 0, 100, 200, 300, 400 and 500 ml/kg WHML. Organoleptic and proximate tests showed that the best treatment was CRL 300 ml/kg WHML (P3) which produced a score of 3.73 aroma, 2.02 texture. Decreased crude fiber content from 20.04% to 16.80% and increased protein content from 11.315% to 13.32%, decreased fat content from 1.08% to 0.33%. Third stage: CRL treatment of 300 ml/kg WHML (P3) was tested for enzyme activity and digestibility of the ingredients. The highest enzyme activity was the amylase enzyme activity, namely 5.792 U/ml and 23.74-32.44% digestibility. Keywords : Water Hyacinth Leaves, Cow Rumen Liqour, Fermentation, Digestibility 
Types and density of bivalve in themangrove ecosystem of the Sungai Asam Village Reteh Sub-districtIndragiri Hilir Regency Riau Province Hutri Aliva; Adriman Adriman; Nur El Fajri
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 1 (2021): Edisi 1 Januari s/d Juni 2021
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Abstract Bivalva is a types of aquatic organism that lives in mangrove ecosystems.                             This research aims to determine the types and density of bivalve in the mangrove ecosystem of Sungai Asam Village. The research has been conducted on July to August 2020. There were 3 stations set, St1 is a mangrove forest area that is relatively natural and far from residential area, St2 was in the mangrove forestwhich is used as a tourist destination and St3 was in the mangrove forest that has residential area. Each station 3 plots/station and 3 subplots/plot. In each subplot (1x1m2), the bivalve were collected by hand. Results shown that there were 3 species of bivalve, namely Polymesoda erosa, Geloina expansa, Pharella acutidents with density was  6.296-41.852 organisms/ha. The density of mangrove trees in Sungai Asam Village is categorized as damaged. There is a close relationship between mangrove tree and bivalve densities. Keyword : Aquatic organisms, Geloina expansa, Mangrove forests,Pharella acutidents, Polymesoda erosa 
THE PROCESSING OFKWETIAUMADE FROM THE SNAKEHEAD FISH PROTEIN CONCENTRATE (Channa striatus) FORTIFIED WITH KARAGENAN Sinaga, Sanni Ezra; Dewita, Dewita; Desmelati, Desmelati
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 1 (2021): Edisi 1 Januari s/d Juni 2021
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ABSTRACTThe research aimed to determine the effect of addition of flour carrageenan at different concentrations on the quality ofkwetiaumade from the snakehead fish protein concentrate. The research used an experimental method andcomposedas a non-factorial Completely Randomized Design (CRD). The treatment conducted wasaddition of carrageenan flour varied in 4 concentrations (0, 2, 6, and 10 %). The results showed that the addition of carrageenan flour was affecting significantly to the snakehead fish protein concentrate kwetiauproduced that wasevaluated by the different sensory value of the taste, aroma, and texture value; folding test, moisture content, protein content, and ash content; and elongation value. The best kwetiau produced was indicated by the addition of carrageenan flour at aconcentration of 2%. This product was characterized by the higestvalue of appearance on7.3 (whole, slightly brownish white), aroma on 6.4 (a little seaweed aroma), taste on 6.7 (slightly tasted seaweed), and textureon 7.7 (chewy and soft). The value of folding test was 8.0 (not cracked when folded one) and the elongation value was 26.48. The content of ash was 2.20 %, protein was 18.68 %, and waterwas 68.11%. Keywords: Carrageenan,kwetiau,rice flour, snakehead fish,snakehead fish protein concentrate,
Hubungan Kelimpahan Fitoplankton dengan Konsentrasi Klorofil-a di Danau Tanjung Kudu dan Danau Parit Kecamatan Tambang Kabupaten Kampar Provinsi Riau Hikma, Murbeni; Simarmata, Asmika Harnalin; Dahril, Tengku
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 1 (2021): Edisi 1 Januari s/d Juni 2021
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ABSTRACT             Research on the relationship between phytoplankton abundance and chlorophyll-a concentration was conducted in December 2020 in Tanjung Kudu Lake and Parit Lake, Tambang District. The aims of this study was to determine the relationship between phytoplankton abundance and chlorophyll-a concentration. There were 3 Station, namely Station 1 (inlet), Station 2 (middle of the lake), and Station 3 (end of the lake). Sampling point were at the surface and 2 Secchidepth, 4 times once/week. Water quality parameters were measuredsuch as temperature, pH, transparency, depth, DO, free CO2, nitrate, and phosphate. The results shown that the correlation between phytoplankton abundance and chlorophyll-a concentration in Tanjung Kudu Lake andParit Lakerespectively : Y = 1.10+3.19X(r) 0,90 and Y = 0.98+3.77X  (r) 0,93. Phytoplankton abundance  in Tanjung Kudu Lake range  22,646-50,124 cells/L and in ParitLake range from 25,344-60,985 cells/L. The chlorophyll-a concentration in Tanjung Kudu Lake range from 1.86-2.82 µg/L and in Parit Lake range from 1.86-3.07 µg/L. Water quality parameters such as temperature 29-29.7oC, pH 5.3-5.6, transparency 47.7-57.3 cm, depth 166.7-266.5, DO 3.1-5.1 mg/L, free CO2 9.9-15.9 mg/L, nitrate 0.02-0.04 mg/L, phosphate 0.02-0.04 mg/L in Tanjung Kudu Lake and in Parit Lake : temperature was 29.5-30oC, pH 5.2-5.6, transparency 57.8-67.1 cm, depth 141-240.7, DO 3.7-5.8 mg/L, free CO2 14.9-8.9 mg/L, nitrate 0.02-0.05 mg/L, phosphate 0.02-0.05 mg/L. Based on the data phytoplankton and chlorophyll-a, Tanjung Kudu Lake and Parit Lakecan be  categorized as mesotrophic.Keywords: Chlorophyll-a,Mesotrofik, Phytoplankton, oxbow lake, water quality                                                    
THE UTILIZATION OF TUNA BONE FLOUR (Thunnus sp) ON THE QUALITY OF ARAI CHIPS Sulistia, Yosi; Sari, Ira; Iriani, Dian
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
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ABSTRACT            This research aims to determine the effect of adding tuna bone flour to the quality of arai chips and to determine the quality content of organoleptic, proximate, and calcium in arai chips. The treatments given consisted of (T0) without 0% bone flour, (T1) giving 5% of tuna bone flour, (T2) giving 10% of tuna bone flour, and (T3) giving 15% of tuna bone flour. The analysis parameters observed were the organoleptic quality test (appearance, aroma, taste, and texture), proximate test, and calcium test. The addition of tuna bone flour 5% (25 g) (T2) resulted in the best arai chips with a characteristic color value of 7.91 (slightly brownish yellow), aroma 7.77 (slightly have kind of bone flour aroma), taste 7.85 (a little bone flour taste), and texture 7.96 (crispy) with moisture, ash, protein, fat, carbohydrate (by difference), and calcium content was 3.39%, 6.81%, 5.52%, 42.12%, 45.55% and 1.11%, respectively.Keywords: arai chips, quality acceptance, tuna bone flour
THE EFFECT OF DIFFERENT NATURAL FEEDING ON THE GROWTH AND LIFE OF MALI LARVES (Labiobarbus festivus, Heckel 1843) Sianipar, Doni MangasiPandapotan; Sukendi, Sukendi; Aryani, Netti
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 1 (2021): Edisi 1 Januari s/d Juni 2021
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ABSTRACT            Natural feeds that are often used as initial feed for fish larvae include Artemia nauplii, water fleas, earthworms, and Tubifex sp. Through adequate feeding, as well as high nutritional content, it can spur growth in Malian Fish. This study aims to determine the effect of different natural feeding on the growth and survival of the larvae of Mali (L. festivus). The method used was an experimental method using a completely randomized design (CRD) with 1 factor, 3 levels of treatment, and 3 replications. The treatments given were P1: Tubifex sp, P2: Water fleas, P3: Chlorella sp. The parameters measured were absolute weight growth, absolute length growth, daily weight growth rate, life span and water quality. The results showed that the best treatment for the effect of growth and survival of mali fish larvae (L. festivus) was natural food for Tubifex sp. The absolute weight growth is 0.24 grams, the absolute length growth is 2.57 cm, and the daily weight growth rate is 14.85%. Meanwhile, the best survival rates were obtained at Tubifex sp. amounted to 88.89%. Water quality parameters during the study temperature: 27-27.4 ° C, pH: 7.2-7.3, DO: 4.1-5.2 mg / L.           Keywords:natural feed, Mali fish, growth, absolute weights
THE EFFECT OF ADDING LIQUID SMOKE ON THE FLAVOR OF FRIED BILIH FISH (Mystacoleucus padangensis Blkr) Nurdintaher, M. Rafian; Leksono, Tjipto; Sari, Ira
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 2 (2020): 2 Juli - Desember 2020
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ABSTRACTThe research aimed to analyze the effect of adding liquid smoke on the flavor of fried Bilih fish. The method used was experimental by immersing Bilih fish into theliquid smoke at different concentration and soaking time. The research was composed to Completely Randomized Design (CRD) with one factor. The parameters are including organoleptic (i.e. appearance, odor, flavor, texture) and proximate analysis (i.e.water, ash content, lipid, protein). The result showed that the use of different amount of liquid smoke has an impact onto the flavor of fried Bilih fish. The best treatment was showed by immersing Bilih fish into liquid smoke at the concentration of 2% for 5 minutes. The best product was shown by the colour performance of bright brown, a bit of liquid smoke smell and flavor, and crunchy texture. The content of water was 2,6%, the ash was 15,2%, the lipid was 43,4% and the protein was 21,5%.Keywords: Bilih fish, flavor, liquid smoke, Mystacoleucus padangensis Blkr
THE EFFECT RECOMBINANT GROWTH HORMONE (rGH) DOSES AND IMMERSION DURATION ON GROWTH AND SURVIVAL RATE OF TAMBAQUI LARVAE (Colossoma macropomum) Sebayang, Nasha Putra; Nuraini, Nuraini; Sukendi, Sukendi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 8, No 2 (2021): Edisi 2 Juli s/d Desember 2021
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ABSTRACT  This research was conducted on October9, 2020 - November 28, 2020, at Fish Hatchery and Breeding Laboratory of Fishery and Marine Science Faculty of Riau University. The aim of this research was to determine the effect of Recombinant Growth Hormone (rGH) and the optimal dose and immersion duration on growth and survival rate of tambaqui larvae (Colossoma macropomum). The method used  was a Completely Randomized Design Factorial with 2 factors. The first factor was  the dose of rGH with 3 levels;  0 mg/L (D0), 1.5 mg/L (D1,5) and 2.5 mg/L (D2,5). The second factor was the immersion duration with three levels of 30 minutes (W30), 60 minutes (W60) and 90 minutes (W90) respectively. The larvae were cultured preserved in aquarium for 40 days with 2 fish/L density. The results showed that the use of different doses and  immersion duration of rGH effected  on absolute weight, absolute length, specific growth and survival rate of river catfish larvae. Treatment dose 1.5 mg /L and 60 minutes (D1,5W60) with the result of absolute weight growth of 2.88 grams, absolute length 4.87 cm, specific growth rate of 18.45 % and survival rate of 91.10 %. The water quality parameters during the study were optimal for river catfish larvae with temperature 26.7-27.9 oC, pH 5.9-6.9 and dissolved oxygen 6.3-7.3 mg/L. Keywords : Doses, Immersion Duration, Recombinant Growth Hormone, Colossoma macropomum.

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