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Yusni Ikhwan
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Journal : Jurnal%20Online%20Mahasiswa%20(JOM)%20Bidang%20Perikanan%20dan%20Ilmu%20Kelautan

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THE ANALYSIS OF NITRATE AND PHOSPHATE CONCENTRATION WITH DIATOM ABUNDANCE IN AIR HITAM STRAIT OF MERANTI ISLANDS REGENCY OF RIAU PROVINCE Marpaung, Andre Thessalonians; Nurrachmi, Irvina; Ikhwan, Yusni
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The research was conducted in July 2014 in Air Hitam Strait of Meranti Islands Regency of Riau Province. This research aims to analyze the concentration of nitrate and phosphate and the relationship with diatom abundance. The samples were taken from 4 stations and each station was divided into 3 sampling points. The result showed the average value of nitrate and phosphate concentration were 0.122 mg/L and 0.021 mg/L. This research identified 12 genus of diatom. The highest abundance of diatom was found in Station 3 around of the floating cage locations (162.96 Ind/L) and the lowest was at Station 4 around harbor (111.11 Ind/L). The result of the simple linear regression of nitrate and phosphate concentration showed a positive relation with diatom abundance, that means if the concentration of nitrate and phosphate are raising the diatom abundance was also increasing.Keywords: Air Hitam Strait, Nitrate, Phosphate and Diatom
THE ABUNDANCE AND DIVERSITY OF ECHINODER IN TIDAL ZONE OF CINGKUAK ISLAND AND PASUMPAHAN ISLAND WEST SUMATRA Raya, Rosanti Dina; Tanjung, Afrizal; Ikhwan, Yusni
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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ABSTRACTThis research carried out in June 2013 on the island of Pasumpahan Cingkuak and West Sumatra Province. The purpose of research is to determine the abundance and diversity of Echinodermata. The method used in this research is a survey method. Echinoderms types found in Cingkuak Island consists of three species classified into two classes, namely Asteroidea and Holothuridea. While the types of echinoderms are found in Pasumpahan consists of seven species are classified into three classes, namely Asteroidea, Ophiuroidea and Holothuridea. The type and amount of echinoderms contained in Pasumpahan more than Cingkuak Island. From calculations mennjukkan abundance in Pasumpahan higher than abundance on the island Cingkuak, respectively 18.65 and 5 ind / m2. For echinoderm species abundance Cingkuak Island which has the highest individual is kind Culcita schimedeliana with a value of 3 ind / m2 and the lowest abundance of individual species is of type Culcita novaeguineae and Synapta maculata which each have a value of 1 ind / m2. While the abundance of individual species is highest in Pasumpahan of sea cucumber Holothuria atra type with a value of 4.5 ind / m2, Holothuria scabra with a value of 4.4 ind / m2, and the lowest individual types of starfish species Culcita novaeguineae with the value of 1.25 ind / m2, and Synapta maculata with value 1 ind / m2. Based on observational data and the results of the data analysis of the value of diversity index at each study site, echinoderms diversity in Pasumpahan higher than Cingkuak Island is 1.3712 to 2.2879 on the island of Cingkuak and Pasumpahan.Keywords: Cingkuak Island, Pasumpahan, Echinodermata, AbundancePENDAHULUAN
Study of Heavy Metals (Pb, Cu, and Zn) in Ark Cockle’s (Anadara inflata) Flesh and Shell in Selat Panjang Waters Kep. Meranti Pane, Dedi Muksin; Ikhwan, Yusni; ', Elizal
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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Ark cockle (Anadara inflata) is one of bivalve species found in Selat PanjangWaters. It is used as indicator of heavy metals pollution because of filter feedercharacteristic and of sedentary life mode. The objective of this study was to determine theconcentration of lead (Pb), Cuprum (Cu) , and Zincum (Zn) in ark cockle’s flesh and shellin Kronjo and Cituis. Heavy metals Pb, Cu, and Zn were analyzed by Atomic AbsorptionSpectrofotometer (AAS).The result showed that the consentration of Pb (3,81 μg/g) in ark cockle’s shell washigher than that of ark cockle’s flesh in contrary the consentration of Cu and Zn (6,03 μg/gand 7,54 μg/g) in ark cockle’s flesh was higher than concentration of Cu and Zn in arkcockle’s shell. Based on assisment of PWTI (Provisional Tolerable Weekly Intake) for heavymetals (Pb, Cu and Zn) in ark cockle A. inflata in Selat Panjang Waters, Meranti Island thatark cockle A. inflata safe to consumtion.Key words: Heavy Metals, Ark Cockle and Selat Panjang Waters
HEAVY METAL CONCENTRATIONS Cr, Cu, AND Zn OF SEAWEED Eucheuma cottonii IN MORO COSTAL WATERS KARIMUN DISTRICT RIAU ARCHIPELAGO PROVINCE Saputri, Dian; Amin, Bintal; Ikhwan, Yusni
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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ABSTRAK This research conducted on Juli 2018 to analyzed and compared the contain of Cr, Cu and Zn on E. cottonii from 3 station with different activity for each station. This research also to analyzed the consumption feasibility and the status of metal pollution using MPI (Metal Pollution Index). The result showed the average of concentrate of Cr 2,147 µg/g, Cu 0,9811 µg/g and Zn 9,3061 µg/g. The index value of metal pollution was 2,69 showed that the condition of water pollution at Moro, district of Karimun, Riau Island Province still at low condition. E. cottonii seaweed from this Moro's water thought that still safe for consumption as long as no more than 3,03 kg/week for Cr, 1020,83 kg/week for Cu, and 210,30 kg/week for Zn. Key words : Metal Pollution, Seaweed, E. cottonii, Riau Archipelago Province
The Relationship Between the Oil Content with the Abundance of Diatoms in the Waters of Kuala Tanjung Batubara Districs North Sumatera. Jonter Sitepu; Yusni Ikhwan; Irvina Nurrachmi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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A study of the relationship between oil content and the abundance of diatoms was conducted in September 2016 in the waters of Kuala Tanjung Batubara District of North Sumatra Province. Seawater samples (for oil analysis and diatoms) were collected from 4 stations. Analysis of oil content and identification of diatom was done conducted in laboratory of Chemistry and Laboratory of Marine Biology, Faculty of Fisheries and Marine Science, University of Riau. The results show that all water quality parameters measured in this study are within the tolerance range for survival of marine organisms. The oil content ranges from 0.1560 to 0.2871 ppm and diatom abundance ranges from 55 to 134 ind / l with 10 species. Based on the results of simple linear regression test, the relationship between oil content with diatomic abundance has a very strong relationship with mathematical equations y = 236,3 - 647,8x with coefficient of determination (R2) = 0,762 and correlation coefficient r = 0,873. The value of r represents a strong relationship with a negative value meaning that with increasing oil content in the waters, the abundance of diatoms in the waters will decrease.Keywords: relationship, oil content, abundance, diatoms, Kuala Tanjung.
Correlation Of Oil Content and Epiphytic Diatom Density in seagrasses Leaves Enhalus acoroides in Rupat Utara Waters Bengkalis Distric Riau Province Adi Maulana; Yusni Ikhwan; Irvina Nurrachmi
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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This study were conducted in survey method. Four stations were established with three replication of each sampling station. It revealed that oil content in water ranged from (0.4391 – 0.7973) ppm. The highest epiphytic diatom density on the seagrass leaves oppeared in station 4 which accounted 366 ind/cm2, while the lowest 132 ind/cm2 found in station 2. During the study, epiphytic diatom species most commonly found are Isthmia sp, Navicula sp, Skeletonema sp, Ulothrix sp, dan Synedra sp. Statistical analysis showed the oil content and epiphytic diatom density correlation were weak with coefficient of (0.05)Key words : Rupat Utara Water, Oil Content, Epiphytic Diatom
ANALYSIS OF Cr, Cu, and Zn CONCENTRATIONS IN THE SHELLS (Meretrix meretrix) FROM PANTAI CERMIN OF SERDANG BEDAGAI REGENCY, NORTH SUMATRA PROVINCE Della Afriyola; Bintal Amin; Yusni Ikhwan
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
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ABSTRACT This research was conducted in March 2018 by taking samples of Meretrix meretrixfrom Pantai Cermin of Serdang Bedagai Regency, North Sumatra Province.The purpose of this research was to determine the metal concentrationsof Cr, Cu and Zn in the shells based on the size from different stations, to evaluate the differences in metal concentrations between umbo and periostacum,as well as to find out the level of metal pollution based on MPI (Metal Pollution Index). Analysis of metal concentrations of heavy metal was done byPerkin Elmer 3110 Atomic Absorption Spectroscopy (AAS). The results showed that the highest Cr metal concentration in umbo was found at Station 3 (10,253 µg/g) in large sizes, the highest Cu was at Station 2 in large size (4,173 µg/g) and for Zn was found at station 2 (132,867 µg/g)in large size. Mean while the highest concentration of Cr in Periostacum was at Station 3 (7,320 µg/g)in large size, Cu was at Station 2 (3,747 µg/g) in small size, and for the highest Zn was at Station 2 (98,777 µg/g)in small size. The concentration of Cr, Cu and Zn was higher in the umbo than periostacum. Based on this study, the MPI value of Pantai Cermin was 10,36 which was quite comparable to other studies.  Keywords: Pollution, Heavy Metal,Meretrix meretrix, Pantai Cermin
Concentration of Heavy Metals Pb and Cu in some parts of Mudskipper (Periophthalmus sp) in The Strait Waters of Rupat, Riau Province Wage Pranowo; Syahril Nedi; Yusni Ikhwan
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
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Heavy metals pollution has become problem in coastal waters due to anthropogenic activities such as disposal of industrial waste, sailing and mining. The research of heavy metals concentration Pb and Cu on mudskipper’s organ systems (muscles, gills and bones) was conducted. It is found that the content of Pb in muscles, gills and bones is in the range 4,6563 – 5,4231 (μg/g), 3,0857 – 4,1851(μg/g), and 2,7716 – 4,1205 (μg/g). While the content of Cu in the muscles, gills and bones is in the range 3,0317 – 3,3333 (μg/g), 1,7619 – 2,8810 (μg/g), and 1,9762 – 3,0159 (μg/g). There is a clear difference on the concentratin of Pb and Cu in muscles, gills an bones (P<0,01). Based on the accumulation of the heavy metals concentration in Mudskipper, the content of Pb and Cu is higher in the small size of Mudskipper than in the big size of Mudskipper. According to the sampling location, the highest Pb composition found in North Rupat Waters, 4,3838(μg/g) while the highest Cu composition found in Dumai Coastal Waters, 2,6085(μg/g).Keywords : Heavy Metals , Mudskipper (Periophthalmus sp), Rupat Strait
DENSITY AND GONAD MATURITY LEVEL OF MANGROVE SHELLS Polymesoda expansa PUTERI SEMBILAN ESTUARY RUPAT UTARA BENGKALIS REGENCY IN RIAU Febrinal Syahputra; Yusni Ikhwan; Syafruddin Nasution
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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This study was conducted in July 2014, located at the Putri Sembilan estuary District of Rupat Utara. Mangrove clams P. expansa is one of the favorite seafood of Rupat Utara coastal communities. In addition as a side dish, clamshell are also used as a household accessories. This study aims to determine the density and maturity level gonad of mangrove clam P. expansa. The method used in this study is a survey method and determination of observation stations was determined by purposive sampling method, where the location of the study divided into three stations. The results showed that the density of higher mangrove clams P. expansa found at station II (± 100 meters from the mouth of the river upstream), while the lowest density was found at station I (outfall mouth of the river). The dominant gonad maturity level of mangrove clam P. expansa found was maturing stage (early stage) and least common was immature stage (period of gonadal development).Keywords: P. expansa, Density, Gonad Maturity Level, Rupat Island.
AN ANALYSE CORRELATION OF CONCENTRATION NITRATE, PHOSPHATE AND SILICATE WITH THE ABUNDANCE OF DIATOMS ON NORTH COAST BENGKALIS ISLAND, BANTAN DISTRICT Gregorius Agung; Irvina Nurrachmi; Yusni Ikhwan
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
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The research was conducted in February 2015 in the North Coast Bengkalis Island, Bantan District. The purpose of this study was to analyze the correlations between the concentration of nitrate, phosphate and silicate as well as an abundance of diatoms, to provide information about fertility waters seen from the content of nitrate, phosphate and silicate as well as an abundance of diatoms in the water, so it can be used as a reference for the development of fisheries and the preservation of ecosystems in a sustainable manner, The research was used purposive sampling method with 3 stations and each station there are four sampling points. The results showed that the concentration of Nitrate, Phosphate and Silicate i.e 0.0747 mg/L; 0.0586 mg/L; 0.0542 mg/L . Diatom species were found 11 species i.e: Rhizosoleniaalata, Rhizosoleniadelicatula, Skeletonemacostatum, Lauderia borealis, NitzschiaSeriata, Isthmia SP, Biddulphiapulchella, Rhizosoleniaindica, Aulacoseria granulate, Lepctocylindrusanmeus and Ceralaulinadentata. An abundance of diatoms at Station 1 , Station 2 and Station 3 as much as 1916.67 Ind/L ; 1316.67 Ind/L ; 3241.67 Ind/L. The results of Regression test showed that nitrate concentrations correlations with diatom abundance of very strong correlation with the value of r (correlation coefficient) = 0.946. Relations with the abundance of diatoms phosphate concentrations are very strong correlations with the value of r (correlation coefficient) = 0.988. Relations with the silicate concentration of diatom abundance of strong correlationss with the value of r (correlation coefficient) = 0,550.Keywords: Nitrate, Phospate, Silicate, Abundance Diatoms,
Co-Authors Adi Maulana Afrizal Tanjung Andre Thessalonians Marpaung Bintal Amin Dedi Muksin Pane, Dedi Muksin Della Afriyola Elizal, Elizal Febrinal Syahputra Gregorius Agung Hardy PH Simanjunntak Irvina Nurrachmi Ivan Purba Jonter Sitepu Martinus Jerianto Rosanti Dina Raya Saputri, Dian Syafruddin Nasution Syahril Nedi Thamrin &#039; Wage Pranowo Yudi Sastriawan