Yusni Ikhwan
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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
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.
Structure of Mangrove Community and It΄s Relation to Macroepifauna Abudance in Intertidal Area of Rupat Straits Riau Province Yudi Sastriawan; Thamrin '; Yusni Ikhwan
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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AbstractObservation on mangrove vegetation density and abundance of macroepifauna was carried out in intertidal area Rupat straits Riau Province in October 2014. The purpose of this study was to determine the structure and mangrove density and it΄s relation to abudance of macroepifauna, it showed that the mangrove vegetation density ranged (2011,11-3044,44 trees/ha) with the highest density was found at station 2 (3044,44 trees/ha) followed by station 1 (2011,11 trees/ha). The abudance of macroepifauna was highest at station 2 (11244,44 ind/ha) followed by station 1 (1088,88 ind/ha). Correlation coeficient of mangrove density and abudance of macroepifauna appeared to be 0,695 and determination coeficient of 0,484, it was calculated that regression equation was y = - 5071 + 4,445x.Keyword : Mangrove, Macroepifauna, Rupat Channel, Density
ANALISYS OF HEAVY METAL CONCENTRATIONS IN SEAWATER AND SEDIMENT OF THE WEST COAST OF KARIMUN BESAR ISLAND RIAU ARCHIPELAGO Martinus Jerianto; Bintal Amin; Yusni Ikhwan
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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This study was conducted in January 2015 to determine the heavy metal concentration of lead (Pb) and copper (Cu) in seawater and sediment in the west coast of Karimun Besar Island of Riau Archipelago. Samples of sea water and sediment were analyzed for their metal concentrations in Marine Chemistry Laboratory Department of Marine Sciences University of Riau Pekanbaru by using AAS Perkin Elmer 3110. Metal concentrations in the sea water were highest in Station I (Pb 0.270 mg/L and Cu 0.140 mg/L), whilst concentrations in the sediment were found to be highest in stations III (Pb 8.055 μg/g, Cu 5.359 μg/g). Concentrations of Pb and Cu in the sediment in the study area was still below the Dutch quality standard for metals in sediments and the default value of the ERL and ERM. Based on I-geo calculations it was considered that the study area still has low impact on aquatic ecology.Key Words: heavy metal, seawater, sediment, Karimun, Lead, Copper
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
Lead, copper and zinc content in soft tissues and shells of blood Cockle (anadara granosa) from coastal water of tanjung balai Asahan regency north sumatera province Hardy PH Simanjunntak; Yusni Ikhwan; Bintal Amin
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 study was conducted in Januari 2014. Samples of blood cockle were taken from onthe waters of Tanjung Balai Asahan North Sumatera. The purpose of this study was to analyzethe metal content of Pb, Cu and Zn in soft tissues and shells of blood cockle with different bodysize, determine the different concentration of Pb, Cu and Zn in soft tissues and shell, determinerelationships of metal content in soft tissues and shells with the body size and to determine thesafety comsumption of blood cockle. Pb and Cu content in the shells were higher than softtisssues whilst Zn was higher in the soft tissues. The average metal content in soft tissues weredifferent by the size where Pb conteten was higher in the small size (1,79 μg/g ), Cu in smallsize (9,69 μg/g) and Zn also in small size (1.227, 81 μg/g). Mean while the average , Pb contentin shells was higher in the large size (8,26 μg/g) , Cu in medium size ( 19,24 μg/g), and Zn wasin the medium size too (1.017, 02 μg/g).Keyword: Heavy metal, A,granosa, Shell, Soft tissue, Tanjung Balai Asahan
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
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