Joko Samiaji
Unknown Affiliation

Published : 43 Documents
Articles

Kandungan Logam Berat pada Jagung yang Dipupuk dengan Kompos IPAL Pabrik Pulp dan Kertas serta Kelayakannya untuk Konsumsi Rasyad, Aslim; Samiaji, Joko; Efendi, Erwan
Jurnal Ilmu Lingkungan Vol 2, No 01 (2008)
Publisher : Jurnal Ilmu Lingkungan

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Sludge as the solid waste produced by pulp and paper industry shows appreciable amounts of essentialelements for plant nutrients, but the use in agriculture is sometime restricted by its heavy metal content. Thisstudy was intended to determine the content of heavy metals in corn plant fertilized by several rates of compostIPAL which was made of sludge obtained from pulp and paper industry. Three levels of compost ie; 10, 20, 30t.ha-1, and NPK fertilizer were applied to corn as well as control in a randomized block design with fourreplications. At around 55 days after planting (DAP), two very young husks (baby corn) and at 90 DAP, 50mature seeds were sampled from each plot. Heavy metals content including Pb, Cd, Cu, and Zn were mesuredfrom these samples by atomic absorbtion spectrophotometer Type NOV-AA 300. It was imperative to note fromthis study that Pb and Cd contents were not detectable both in baby corn and mature corn seed obtained fromplants applied by any level of compost. Copper and Zinc contents were significantly increased in baby corn andmature seed of plants applied by compost compared to that applied by NPK fertilizer or control. However, ifthe heavy metal contents observed from this study were converted to daily tolerable intake for human, thevalues were lower than the maximum tolerable standard, thus both baby corn and mature seed harvested fromcorn fertilized by compost IPAL were save for human consumption.
Jenis dan kelimpahan ikan tembakul di pantai dumai provinsi riau Naibaho, Reny Cristina; Samiaji, Joko
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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The study to observe the species composition and abundance on mudskipper fish was conducted in July 2013 in Dumai coastal waters of Riau Province, Indonesia. They study was carried out in providing the lack information on the biological aspects of the mudskipper from Indonesian seas in general, and of the riau’s coasts in particular. They study used a survey method by selecting 3 different stations as the sampling sites. Fish sampels were collected during the low tide. The quadrant were used in the field in facilitating the survey in fish abudance, whilst the identification was commenced in the Laboratory of Marine Biology of University of Riau. The resuld showed that a number of three species of the mudskipper were sucessfully recorded, i.e. Periopthalmodon schlosseri, Periopthalmus variabilis (Eggert) and Baleopthalmus boddarti (Pall). In terms of abudance, the highest, 0,1733 individuals/m2 was recorded in station I and the lowest 0,0867 individuals/m2, was found in stations III. Based on the diversity index (H’), it was reported that the Dumai coast had moderate diversity of the mudskipper. None of the fish was dominating the population since the dominance index (C) was very close to null from each station. It can be concluded that the habitats of mudskipper in Dumai coasts were in the state of unstable due to its E value in which also close to one.   Keywords : Mudskipper, species composition, abudance, Riau
Komposisi jenis dan kelimpahan fitoplankton perairan laut riau Ariana, Dewi; Samiaji, Joko; Nasution, Syafruddin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This research was conducted in April 2013 and was located at Riau marine waters. Samples were analyzed in the Biology Laboratory of Marine Science Department of Fisheries and Marine Science Faculty of Riau University. The aim of this study was to observe the phytoplankton communities. This research used survey method. The study found 31 species of phytoplankton, these were 19 species from Bacillariophyceae, 9 species from Dinophyceae, 2 species from Chlorophyceae and 1 species from Cyanophyceae. Phytoplankton was dominated by group of Bacillariophyceae (Diatoms) 61%. The other groups comprising of Dinophyceae 29%, Chlorophyceae (7%), and Cyanophyceae 3%. Phytoplankton abundance varied from 87-593 ind/L, the higest value in station 9 Zone III and the lowest value in station 11 zone III. Whereas the highest value of zone abundance was zone II 443 ind/L and the lowest was zone I 253 ind/L. Phytoplankton community was dominated by the group of diatoms, such as Nitzschia sigma, Thallasiothrix longissima, and Thallasiothrix delicatula.Keywords: Marine Phytoplankton, Bacillariophyceae, Marine of Riau
The Study Of Chlorophyll- Content By Using Aqua Modis Satellite Imagery In Marinewaters Of Rokan Hilir Regency Riau Province Siagian, Raja; Samiaji, Joko
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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The research was conducted from October until December 2013 at marinewaters of Rokan Hilir Regency Riau Province. The purpose of this research was toinvestigate the chlorophyll- content using Aqua MODIS satellite image whichwas presented in the form of a map. The method used was case study method. Theresults showed the chlorophyll- concentrations were not varied greatly. InOctober and November 2013 the lowest values were 0,71 l and 0,69 mg/lrespectively, whereas the highest value in both months was 1,73 mg/l. Thechlorophyll- values in December 2013 ranged from 0,77-1,91 mg/l. The studyfound that the high values of cholophyll- in general were shown increasingtowards the coastal areas.Key words : Chlorophyll- , Aqua MODIS and Rokan Hilir Regency
Study of Marine Fishing Grounds Based on the Content of Chlorophyll-a And Sea Surface Temperature Via Satellite Imagery of Aqua MODIS of Marine Areas of Rokan Hilir Regency Samiaji, Joko
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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The study was conducted in October-December 2013. The area of studywas in Rokan Hilir coastal waters, while data analysis was done in the PhysicalOceanography Laboratory, University of Riau, Pekanbaru. The method used wassurvey method with the materials were obtained from the imagenary satellite byusing Aqua MODIS level 1b. The analysis was supported by using software ofEnvi 4.5 and Arcgis 10.The result showed the chlorophyl-a concentration in Rokan Hilir regencywaters varied for each month. In October the value of chlorophyl-a ranged from0.211-1.736 mg/m³, in November the concentration ranged from 0.217-1.731mg/m³, whereas in December the value ranged from 0,286-1,914 mg/m³. The seasurface temperature for each month showed as follows: in Oktober 25°c to 30°c,in November 26°c to 30°c, in December 29°c to 32°c, respectively. The visualanalysis showed that the most potential fishing grounds were found along thecoastal areas of Sinaboi, Sei Nyamuk, and Pulau Halang.Keywords: Fishing Grounds, Chlorophyll-a, Sea Surface Temperature AquaFashionable, And Marine Areas Rokan Hilir.
ZONATION STUDY AND DENSITY OF MANGROVE FOREST IN EAST MORO VILLAGE OF MORO DISTRICT OF KARIMUN REGENCY RIAU ISLANDS Hidayati, Sri Ratna; Siregar, Sofyan H.; Samiaji, Joko
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 study was held in June-July 2014 in the east Moro Village coast. The method used was a survey method, where the data was obtained directly from the field. Observations on mangrove vegetation was done through transect line method and sample plots. The results indicated that the zoning of mangrove in Moro was complete. The study showed the existence of mangrove vegetation types from 15 species and 10 families. Mangrove vegetation comprised of R. apiculata, R. mucronata, R. stylosa, Avicennia lanata, Bruguiera gymnorhiza, Ceriops tagal, C. decandra, Sonneratia alba, Xylocarpus granatum, Lumnitzera littorea, Scyphiphora hydrophyllacea, Pandanus tectorius, Nypa fruticans, Scaevola taccada and Acrostichum speciosum. Parameter that observed from each zone is the shape of mangrove forest substrat, mangrove vegetation types and trees community. The density and zonation at each station were divided into three zones: front zone, middle zone and the rear zone, starting from the outermost point of mangrove species growth to the point of transition between sea and land. It was found that the most dominant mangrove was Rhizophora apiculata.Keywords: Mangrove, Zonation, Rhizopora apiculata, Moro
Habitat Characteristics and Reproductive Aspects of Olive Ridley Sea Turtles (Lepidochelys olivacea) in Sunur Beach of Pariaman City of West Sumatra Province Hasibuan, Anggi Irfan; Samiaji, Joko; Nasution, Syafruddin
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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Research has been conducted in the month of June to August 2014 at Sunur Beach of Pariaman City of West Sumatra Province. The purpose of this study was to investigate the characteristics of nesting habitat of sea turtle (Lepidochelys olivacea), fecundity, egg diameter, and hatching numbers associated with the size of the parent turtle. The results showed the characteristics of the nest were as follows: the average nest depth was 37.48 cm, nest diameter was 20.66 cm, the average temperature was 29.92 °C nest surface, the temperature inside the nest was 29.25 oC, sediment texture size 1,55 mm and the distance from the nest highest tide towards the ground 1.80 m. The average length was 67 cm nest, nest an average width was 19.8 cm, the average number of eggs was 105.6, the average diameter was 38.02 mm eggs. The average number of eggs hatching success was 93.33%.   Kata Kunci : Lepidochelys olivacea, nesting habitat, reproduction, Sunur Beach  
PROFIL PARAMETER KIMIA OSEANOGRAFI PANTAI TIMUR SUMATERA Fadli, Fani; Samiaji, Joko; Amin, Bintal
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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This study was conducted in April-May 2013 in the inner marine waters of the eastern coast of Sumatra and the samples were analyzed in the Chemistry Laboratory of Marine Science Department of Fisheries and Marine Science Faculty of Riau University. This study was aimed to determine the chemical profile of oceanographic parameters in the coastal waters of the east coast of the Sumatra region into two parts, namely the southern and northern parts. Based on the analysis conducted on the chemical oceanographic parameters such as nitrate, nitrite, phosphate, ammonia, dissolved oxygen, and the degree of acidity. Concentration nitrate, nitrite, phosphate, and ammonia has a high concentration values with the approach of sampling stations towards the coast. While the dissolved oxygen and the degree of acidity of the sea towards the higher concentration value. The overall values of water quality parameters were as follow a). In the south section: nitrate 0.0102-0.0890 mg/l, nitrite 0.0675-0.4388 mg/l, phosphate 0.0022-0.0310 mg/l, ammonia 0.0403-0.6602 mg/l, DO 4-7 mg/l, pH 7.48-8.16. b). In the north section: nitrate 0.0025-0.0331 mg/l, nitrite 0.0738-0.1097 mg/l, phosphate 0.0044-0.0177 mg/l, ammonia 0.0333-0.9229 mg/l, DO 5-8 mg/l, pH 7.53-8.15. The physical parameters of the water was a factor in supporting this research.Keywords: East coast of Sumatra, chemical, oceanography
Distribution of the Abundace Fur Shell (Anadara inflata) in Intertidal Coastal Water of Tanjung Balai Asahan North Sumatera province S, Ruth Natalia.; Nasution, Syafruddin; Samiaji, Joko
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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This research was conducted from January-February 2013 in the coastalwaters in Tanjung Balai Asahan, North Sumatera Province. The aim of thisresearch was to understand the pattern distribution and density of fur shells (A.inflate). Survey method was applied on this research where data were obtained bydirect observation in the field. The samples of shells fur were analyzed in thelaboratory of Marine Biology, of Riau University. Water quality parameters weremeasured in situ.The results showed that the pattern distribution of fur shells (Anadarainflata) was in a group. The density of A. Inflata ranged from 125 ind/m2 to 136ind/m2. These values were not significant different when they were statisticallytested. Moreover, the water quality parameters were in the sufficient range formarine fur shells (A. inflata) survival.Keywords: Anadara inflata, distribution, Tanjung Balai Asahan, density
KOMPOSISI JENIS DAN KELIMPAHAN FITOPLANKTON PERAIRAN LAUT RIAU Ariana, Dewi; Samiaji, Joko; Nasution, Syafruddin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

This research was conducted in April 2013 and was located at Riau marine waters. Samples were analyzed in the Biology Laboratory of Marine Science Department of Fisheries and Marine Science Faculty of Riau University. The aim of this study was to observe the phytoplankton communities. This research used survey method. The study found 31 species of phytoplankton, these were 19 species from Bacillariophyceae, 9 species from Dinophyceae, 2 species from Chlorophyceae and 1 species from Cyanophyceae. Phytoplankton was dominated by group of Bacillariophyceae (Diatoms) 61%. The other groups comprising of Dinophyceae 29%, Chlorophyceae (7%), and Cyanophyceae 3%. Phytoplankton abundance varied from 87-593 ind/L, the higest value in station 9 Zone III and the lowest value in station 11 zone III. Whereas the highest value of zone abundance was zone II 443 ind/L and the lowest was zone I 253 ind/L. Phytoplankton community was dominated by the group of diatoms, such as Nitzschia sigma, Thallasiothrix longissima, and Thallasiothrix delicatula.Keywords: Marine Phytoplankton, Bacillariophyceae, Marine of Riau1)