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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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THE USE OF HETEROTROFIC BACTERIA FOR GROWTH AND SURVIVAL RATE OF TILAPIA SALINE (Oreochromis niloticus) Tri Emrinelson; F. Feliatra F. Feliatra; Iesje Lukistyowati
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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ABSTRACTThe heterotrophic bacterial isolate used came from the collection of the Marine Microbiology Laboratory, Department of Marine Sciences, University of Riau. This research aims to look at the effect of feeding fish mixed with heterotrophic bacteria on survival rate, absolute weight growth, heterotrophic bacterial counts and water quality. This research was conducted in May - June 2019. This research used an experimental method with a Completely Randomized Design (CRD), carried out four levels of treatment with three replications. The treatments given were P0 without the addition of bacterial isolates, P1 addition of isolate J, P2 addition of N isolates and P3 addition of all isolates. The results showed the level of life graduation obtained a value of P> 0.05, ie there was no effect of the addition of bacterial isolates to the level of survival rate. The growth of absolute weight is influenced by the addition of bacterial isolates with a P value <0.05 and the highest average is at P3 of 6.09 g. In the measurement of bacterial isolate water quality did not give effect, but the water quality is still optimal for fish maintenance with temperatures between 27-28ºC, pH between 7.0-8.0, DO between 3.8 - 4.5 mg / l, and ammonia 0.70-1.82 ppm. Keywords: Heterotrophic Bacteria, Survival Rate, Tilapia Saline (Oreochromis niloticus), Weight Growth.
Isolation and Identification of Biosurfacting Bacteria from the Contact Pond of WWTP Palm Oil Industry Pond Raynaldo Empindonta Sembiring; M. Hasbi M. Hasbi; Budijono Budijono
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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AbstractBiosurfactants are surfactants produced by bacteria capable of degrading oil in water. This study aims to obtain bacteria that can produce biosurfactants from the Contact Pond of IPAL palm oil industry PT. Eka Dura Indonesia, Kota Lama, Rokan Hulu Regency, which was held from April to July 2019. The procedure for the implementation, first, the sample was diluted and enriched using BHI (Brain Heart Infusion) media for 24 hours. Based on the results of the study found 3 isolate of bacteria. The three bacteria are bacteria that can produce bio surfactants with an emulsification index of Isolate D1 41.81%, Isolate D2 43.6%, and Isolate D3 32.72%. Keywords: Bio surfactants, Proteus vulgaris, Proteus mirabilis, and Enterobacter aerogenes 
THE USE OF MICROALGAE Chlorella vulgaris FOR REDUCTION OF POLLUTANT LEVELS IN SEA WATER OF MUARA ANGKE POLLUTED BY DOMESTIC WASTE Risma Tambunan; Aras Mulyadi; Dessy Yoswaty
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT This research was conducted in April-June 2019, located at the Center for Environmental Technology Laboratory (PTL) - Agency for the Assessment and Application of Technology (BPPT), Geostech Building 820, Serpong Archipelago Puspitek, South Tangerang. The purpose of this study was to determine the growth of C. vulgaris microalgae cultured in Muara Angke seawater polluted by domestic waste and to analyze its ability to reduce pollutant levels based on chemical parameters from Muara Angke seawater polluted by domestic waste. The experimental design used was a Completely Randomized Design (CRD) with 3 treatments of different C. vulgaris concentrations consisting of 5% v / v, 15% v / v, and 25% v / v performed three times repetition and given control that was without the addition of C. vulgaris and observed physical parameters (Temperature) and chemical parameters (DO, pH, COD, Phosphate, Nitrate, and Ammonia). Data were analyzed statistically using Analysis Of Variance (ANOVA) and further tested using the LSD test to compare between treatments with a 95% confidence level. The results showed that algae C. vulgaris had the potential to reduce levels of pollutants in sea water polluted by domestic waste, and the best treatment in reducing levels of pollutants in sea water polluted by domestic waste was treatment C (25%) with the decrease in COD value of 75.76% , Phosphate at 80.72%, Nitrate at 91.76% and Ammonia at 76.17% so that the levels of pollutants in the media used are in accordance with quality standards for their designation.   Keyword: Chlorela vulgaris, domestic waste, COD, Phosphate, Nitrate, Ammonia
Identification of coral fish species in the coral reef ecosystem in the coastal waters of Teluk Bakau Village, Bintan Regency Kepulauan Riau Province Sari, Dini; Eddiwan, Eddiwan; Efizon, Deni
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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AbstractIn the coastal water of TelukBakau village there is coral reef ecosystem that is inhabitby many coral fish species. Information on the types of coral fishes living in that area is limited. To understand the types of coral fishes in the coral reef ecosystem in that area, a study has been conducted in March-April 2019. Fish samplings were conducted once a weeks in 1 month. The fishes were captured using gill nets and bamboo traps. Fish samples were then identified. Results shown that the fish caught from the study area consistedof 2 orders, 13 families, 19 genera, and 28 species. The most common fish present during the study was the member of  Holocentridae and Lethrinidaefamilies. Keyword: Identification, Coral fish, Coral Reef Ecosystem, Teluk bakau, Bintan Regency
Relation of Accumulated Sediment with Coral Reef Cover in the Lagoi Waters Bintan Regency Kepulauan Riau Province Sidabalok, Westy Yulia; Rifardi, Rifardi; Elizal, Elizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT This research was conducted in Lagoi Waters Banyan Tree Bintan Region to observe  effect accumulated sediment on coral. Three stations were selected forthe measurement of accumulated sediment was conducted using sediment traps which is apllied in the station of coral observation for 21 days. Point Intercept Transect (PIT) was used for the observation of coral reef. Regression analyses was applied clarify the correlation between accumulated sediment  and coral reef. The result of this study showed that the rate of accumulated sediment  in all observation stations ranged from 1.49 – 2.90 mg/cm2/day. The effect can be categorized as low to medium. The condition of coral reef in Lagoi Waters Banyan Tree Bintan Region is classified in good, indicated by  percentage of coral cover in observation stations ranged between 50-74%. The result of regression analysis showed that the accumulated has negative impact of life coral reef in Lagoi Waters Banyan Tree Bintan Region.Keywords : Accumulated sediment, Coral reef, Lagoi Waters.
The Decaying Rate of Organic Matter in the Inundation of PLTA Koto Panjang Reservoir, Batu Bersurat village, Sub District XIII Koto Kampar, Kampar Regency, Riau Province Manurung, Dostiarni Minsa Karolina; Simarmata, Asmika Harnalin; Dahril, Tengku
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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AbstractThe decaying rate is the quantity of organic matter that can be decomposed by bacteria per unit time. To determine the decaying rate or the load of organic matter in the Inundation of PLTA Koto Panjang Reservoir, Batu Bersurat village, research was conducted on June-July 2019. There were three stations namely station 1(tourism area and arround of this station there were palm’s plantation), station 2 (there were restaurant and trees arround of station) and station 3 (floating cage). Each station was determined three sampling points, namely in the surface (15 cm), 2 Secchi depth (330 cm) and 4 Secchi depth (660 cm). Sampling was conducted 4 times, once/week. Water quality parameter measured were dissolved oxygen, BOD5, temperature, pH, transparancy and depth. Results shown that the value of K was 0.18/day – 0.50/day.Water quality parameter such as: dissolved oxygen was 5.42 mg/L – 7.53 mg/L, BOD5 was 4.03 mg/L – 8.90 mg/L, temperature was 28.7oC –30.7oC, pH  was 5 – 5.2, transparancy was 145 cm –187.5 cm and depth was 17.7 m – 29.7 m. In the inundation of PLTA Koto Panjang reservoir in Batu Bersurat village, the decaying rate was faster than the accumulation of organic matter, except in floating cage area. Keywords : Load of organic matter, accumulation, dissolved oxygen, BOD5, water quality
EFFECT OF SEDIMENT PARTICLE SIZES ON THE DENSITY AND MORPHOMETRIC SEAGRASS LEAF (Enhalus acoroides) IN JAGO-JAGO SEA WATERS OFTAPANULI TENGAH NORTH SUMATERA Sibarani, Rosari; Zulkifli, Zulkifli; Tanjung, Afrizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT ThisresearchhasbeenheldonMarch-April2019inJago-Jago sea waters of Tapanuli Tengah, North Sumatera. Thepurposeofthisstudy wastodeterminethedensity ofspecies, morphometricsofEnhalus acoroidesleaves. Thestudy wasalsoaimedto analyzetheeffect of sediment particle sizesondensity andmorphometricsofseagrass leaves. Thestationsweredetermined by purposivesamplingandusetransectline methodfortaken sample. The results of this study showed that the highest density was found in Station II which had very coarse sand sediment particles, coarse sand, medium sand and fine sand with a value of 33,99 stands / m2and the lowest density is found in Station III which has very coarse sand sediment particles and coarse sand with a value of 31,88 stands / m2. Morphometric average length of seagrass leaves the longest at Station II with a value of 36,90 cm and the shortest at Station I with a value of 32,29 cm. Morphometric average width of seagrass leaves at Station II with a value of 1,60 cm and the shortest at Station I and III with a value of 1,50 cm. The result ofsimple linear regression test results of the effect of sediment particle size on the density and morphometrics of seagrass leaves with R2(coefficient of determination) = 0,44; 0,22; 0,35 indicate the effect of sediment particle size on the density and morphometrics of seagrass leaves Enhalus acoroides.    Keyword: Sediment Particle Sizes, Seagrass, Density, Morphometrics
Species and Density of Gastropods in the Mangrove Ecosystem of the Apar Village, North Pariaman District, West Sumatera Province sovia, Vina; Fajri, Nur El; Sumiarsih, Eni
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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AbstractMangrove forest in the Apar Village has been degraded due to anthroponegic activities. The activities counducted in that area damage the mangrove and thus negatively affects gastropods living in that area. A research aims to identify gastropods species and density was conducted in july 2019. There was 2 stations, with 3 plots/station and 5 subplots/plot. In each subplot, the gastropod were collected by hand. There were 11 gastropod species present, namely Telescopium telescopium, Cerithideaquadrata, Faunus ater, Neritinaturrita, Neritinasemiconica, Nerita lineate, Neritodryasdubia, Ellobiumaurisjudae, Cassidulaaurifelis, Thiarascabra and Littorinascabra. Density of gastropod ranges from 0,066-2,667 organisms/. The Water quality were as follows : temperature 26-32˚C; soil temperature 29-33˚C; pH 7; soil pH 5-6 and salinity  4-22 ‰ Keywords: Cerithideaquadrata, water quality, mangrove forest, anthroponegic activities, salinity    
COMMUNITY STRUCTURE OF MAKROZOOBENTHOS IN THE INTERTIDAL ZONE OF KARANG ISLAND, CENTRAL TAPANULI, NORTH SUMATERA Sinaga, Andri Decshana; Mulyadi, Aras; Tanjung, Afrizal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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ABSTRACT Makrozoobenthos is a benthic animal measuring >500µm that lives on the bottom and surface of the water substrate. Makrozoobenthos community structure is influenced by changes in environmental factors. The reseach was conducted in August-November 2018 in the coastal waters of the Karang island of Sosorgadong District, Central Tapanuli Regency, North Sumatera Province.The aims of the research were to determine the structure of the makrozoobenthos community which includes species, abundance, diversity index, uniformity index and dominance index. Sampling used the line transect method at 3 stations. The results of the study found 5class makrozoobenthos consisting of 24 species. The abundance value obtained was in the range of 7-8 ind./m2. Diversity index values ranged from 1.07-1.48, which are classified as moderate, while the uniformity index value ranges from 0.72-0.91 which is balanced. The dominance index value ranged from 0.39-0.59, i.e there are species that dominate.Keywords: Makrozoobenthos, Community Structure, Karang Island
Biological Aspects Reproduction of Betok Fish (Anabas testudineus Bloch) in the Peat Swamp Area in the Pelalawan Village, Pelalawan District, Riau Province Putri, Dea Ananda; Putra, Ridwan Manda; Eddiwan, Eddiwan
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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ABSTRACT Anabas testudineus is one of freshwater fish living in the peat swamp area in the Pelalawan Village. A study aims to determine the reproductive biological aspect of betok fish. The fish was sampled 6 times, from March to May 2019. Parameters measured were sexuality, sex ratio, gonad maturity level, gonad somatic index (GSI), fecundity and egg diameter. Result shown that there was 102 fishes, 60 males and 42 females. Sex ratio of males and females was 1,4:1. In each sampling time there were male and females fishes in I, II, III and IV gonad maturity level. The gonad somatic index (GSI) in males were around 0,60-0,96% and females were around 0,62-2,79%. The female’s fecundity were around 2.395-4.862 eggs/fish, and egg diameter ranged from 0,5-0,8 mm.Keywords : Anabas testudineus, Sex ratio, fecundity, Gonad Maturity Level, Gonad Somatic Index.

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