Articles

Found 8 Documents
Search

Pengenalan Genus Diatom Menggunakan Principal Component Analysis dan Jaringan Saraf Tiruan Propagasi Balik Sebagai Classifier Rahmi, Silvia; Haryanto, Toto; Pratiwi, Niken TM
Jurnal Ilmu Komputer dan Agri-Informatika Vol 2, No 1 (2013)
Publisher : Departemen Ilmu Komputer IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Diatom merupakan suatu mikroalga unisel (kadang berkoloni) yang mempunyai peranan penting dalam dunia riset dan penelitian. Identifikasi diatom merupakan pekerjaan yang rumit. Hal ini dikarenakan diatom memiliki ratusan taksa dengan banyak variasi bentuk dan karakteristik biologi yang menyebabkan proses identifikasinya tidak mudah bahkan bagi seorang pakar. Penelitian ini menerapkan Principal Component Analysis (PCA) untuk reduksi data dan Jaringan Saraf Tiruan (JST) untuk identifikasi diatom. Proporsi PCA yang digunakan ialah 80% dan 90%. JST yang digunakan adalah propagasi balik dengan satu hidden layer. Data yang dipakai pada penelitian ini adalah citra diatom berformat JPG yang diambil menggunakan mikroskop elektrik. Hasil penelitian menunjukkan bahwa generalisasi terbaik sebesar 90% diperoleh pada percobaan menggunakan proporsi PCA 90% dengan persentase data latih 80%.
Komposisi Fitoplanton dan Status Kesuburan Perairan Danau Lido, Bogor-Jawa Barat Melalui Beberapa Pendekatan Pratiwi, Niken TM; Hariyadi, Sigid; Ayu, Inna Puspa; Iswantari, Aliati
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.243 KB) | DOI: 10.14203/jbi.v9i1.152

Abstract

Danau Lido merupakan perairan yang banyak dimanfaatkan untuk berbagai aktivitas manusia yang akan memberimasukan bahan organik dan anorganik ke perairan. Masukan tersebut dapat meningkatkan kandungan nutrienperairan. Hal ini dapat menyebabkan berubahnya status kesuburan perairan. Penelitian ini bertujuan untukmengetahui komposisi fitoplankton dan menduga status kesuburan perairan Danau Lido melalui beberapa pendekatan.Komposisi fitoplankton di stasiun KJA dan non-KJA relatif sama. Proporsi dan kelimpahan tertinggiberasal dari kelompok Bacillariophyceae, terutama dari genus Melosira sp. Status kesuburan berdasarkan parameteryang diolah dengan menggunakan pendekatan TSI, TRIX, dan Indeks Nygaard menunjukkan bahwa perairan DanauLido memiliki status kesuburan eutrofik. Indeks Nygaard masih relevan dan dapat diterapkan dalam penentuanstatus kesuburan perairan.Kata kunci: Danau Lido, Indeks Nygaard, status trofik, TRIX, TSI
Pengaruh Aerasi Injeksi Udara terhadap Beberapa Parameter Kualitas Air di Lokasi Budidaya Ikan Waduk Ir. H. Djuanda Astuti, Lismining Pujiyani; Pratiwi, Niken TM
Journal Omni-Akuatika Vol 12, No 3 (2016): OmniAkuatika special edition Kripik SCiFiMaS
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.028 KB) | DOI: 10.20884/1.oa.2016.12.3.127

Abstract

Waste of fish farming in floating net are fish feces, urine and undigested feed which is one source of organic matter inputs in Ir. H. Djuanda. Waste organic materials can cause eutrophication of waters. Air injection is one way aeration to increase oxygen to help the process of organic matter decomposition. The purpose of this study was to assess the effect of air injection on some parameters of water quality in fish farming side. This research was conducted at the location of fish farming Ir. H. Djuanda in June-September 2013. Injection of air using a compressor with a pressure of 3 atm as a source of air and perforated pipe at a depth of 3.6 m. Air injection carried out for 8 hours. Observation point vertically at a depth of 3.6 m and horizontally at a distance of -1.5 m (behind the diffuser pipe); 0 (the diffuser pipe); 1.5 m (right and left pipe); +1.5; +3 And +6 m (in front of the pipe diffuser) and a distance of 17 m of pipe which is control. After eight hours of aeration showed that the concentration of organic matter, free carbondioxide, N-NO2 tend to belower in cages aerated but N-NO3 concentration was higher in locations aeration cage than controls cageKeywords: air injection aeration, water quality, fish cage culture, Ir. H. Djuanda Reservoir
Struktur Komunitas Perifiton Dibagian Hulu Sungai Cisadane, Kawasan Taman Nasional Gunung Halimun Salak, Jawa Barat Pratiwi, Niken TM; Hariyadi, Sigid; Kiswari, Dhona Indah
JURNAL BIOLOGI INDONESIA Vol 13, No 2 (2017): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.907 KB) | DOI: 10.14203/jbi.v13i2.3403

Abstract

ABSTRACTPerifiton is one community of organisms that can adapt and thrive in the river, and relatively settled in one location. Riparian vegetation in the Mountain Halimun-Salak National Park could be expected to affect the community structure of periphyton. The purpose of this study was to identify the community structure of periphyton on different vegetation canopy coverage, to analyze relationship between the communities structure of periphyton and upstream Cisadane water quality conditions, and to determine water quality based on perifiton community. There were three sets three stations based on canopy coverage (80%, 60%, dan 40%). The results showed two groups of stations, the high canopy coverage (80%) and the low canopy coverage. The highest perifiton abundance was found at stations low canopy coverage, that dominated by Bacillarophycae, Pennales order, especially Navicula with higher rate of succesion than the higher canopy caverage. Abundance of periphyton of low canopy coverage was affected by ammonium, turbidity, and water current. Furthermore, in stations high canopy coverage it was influenced by orthophosphate and currents. As a whole, the periphyton community at upstream of Cisadane indicated a good condition of water quality.Keywords: canopy, periphyton, succession rate
Morphological Identification and Diversity Analysis of Fossil Diatoms from Diatomite Sangiran Central Java Indonesia Khustina, Yenny Chusna; Solihin, Dedy Duryadi; Pratiwi, Niken TM
JURNAL BIOLOGI INDONESIA Vol 10, No 2 (2014): Jurnal Biologi Indonesia
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2258.95 KB) | DOI: 10.14203/jbi.v10i2.2105

Abstract

Diatomite Sangiran is diatom fossil rich sediment. The aim of this research was to study the diversity of fossildiatoms from Sangiran, Indonesia based on morphological characteristics. Samples were taken from lower, middle,and upper sediment layers based on their different physical features with three replications each. Diatomiteextraction was performed following modification of Setty (1966) and frustule counting was accomplished by censusmethod. There were total 50 species found in diatomite layers. The diversity analysis showed that highest speciesrichness (21-22), diversity (1.35-1.47), and evenness index (0.44-0.48) were belong to the lower layer. The highestfrustule abundance (9.66x107-1.43x108 frustules/gram) and dominance index (0.67-0.72) were belong to themiddle layer. On the other hand, highest centrales:pennales ratios (0.73-1.11) were belong to the upper layer. Thesediment layers signified an obvious indication of gradual changes from marine to freshwater environment.Dendrogram analysis using MINITAB.v.15.1.2 software denoted similarity between lower sediment layer and theyounger layers was 72.12%; while similarity between middle and upper layers 92.63%.Keywords: diatom, diatomite, diversity, morphology, Sangiran
THE USE OF TROPHIC DIATOM INDEX TO DETERMINE WATER QUALITY IN THE UPSTREAM OF CILEUNGSI RIVER, WEST JAVA Pasisingi, Nuralim; Pratiwi, Niken TM; Krisanti, Majariana
Indonesian Fisheries Research Journal Vol 20, No 1 (2014): (June 2014)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (284.132 KB) | DOI: 10.15578/ifrj.20.1.2014.11-16

Abstract

Human activities in the watershed in the upstream of Cileungsi river have tendency to bring high organic materials to the river which determines the aquatic condition of the river. The decreased water quality is event because of the organic materials in the upstream of Cileungsi river would bring negative impacts towards water condition in the downstream. This study was conducted in determining the water quality in the upstream of Cileungsi river, using Trophic Diatom Index (TDI). The sampling was taken in four different sites in the river and sub-river of the upstream of the river. The sampling of ephilitic diatom organisms were taken by scraping the surface of substrate rocks using brush then soaked the materials into a sampling bottle which hasbun containing destile water. Diatom density was measured using census method according to standard of APHA 2012. The TDI score ranged from 48.25 to 60.47, indicating that the water quality of upstream of Cileungsi river is classified from good until poor condition.
Keberhasilan Hidup Tumbuhan Air Genjer (Limnocharis flava) dan Kangkung (Ipomoea aquatica) dalam Media Tumbuh dengan Sumber Nutrien Limbah Tahu Pratiwi, Niken TM; Ayu, Inna Puspa; Utomo, Ingga DK; Maulidiya, Ida
JURNAL BIOLOGI INDONESIA Vol 14, No 2 (2018): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1397.885 KB) | DOI: 10.14203/jbi.v14i2.3745

Abstract

ABSTRACTYellow bur-head (Limnocharis flava) and water spinach (Ipomoea aquatica) are usualy grown  in commercial fertilizer as nutrient source.  Tofu waste water is one of alternative to substitute commercial fertilizer. This study aims to analyze the ability of those aquatic plants in utilizing nutrients in liquid tofu waste for growth. The experiments were set applying nutrients source treatments with simple random in times experimental design (waste water + aquatic worm (without tofu rest) + bacteria/GCB and KCB; waste water + baceria/GB and KB; and water + aquatic worm (with tofu rest)/ACG and ACK, with ANOVA to analyse plants growth respons towards water quality of each treatment. The results showed a significant increase in the growth of both plants. Relative growth rate of GCB and KCB were 0,0124 dan 0,032 gr/day, with doubling time of 56 and 21,659 days; for GB and KB were 0,0055 and 0,0055 gr/day, then 126 days; for ACG and ACK were 0,0200 and 0,029 gr/day, with 35 and 23,739 days of doubling time. A good performance of growth were shown by ACG treatmet for yellow bur-head and ACK for water spinach.  The best result was shown by ACK, the water spinach that grown in water with tofu rest and worm.Keywords: growth, tofu waste water, yellow bur-head (Limnocharis flava), water spinach (Ipomoea aquatica) 
The growth and survival rate of Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) in the aquaponic system with different vetiver (Vetiveria zizanioides L. Nash) plant density Widyatmoko, .; Effendi, Hefni; Pratiwi, Niken TM
Jurnal Iktiologi Indonesia Vol 19, No 1 (2019): February 2019
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.482 KB) | DOI: 10.32491/jii.v19i1.346

Abstract

Tilapia fish farming with the aquaponic is a system of cultivation that can save land use and increase the efficiency of nutrient utilization of residual feed and fish metabolism by the plant. This research aimed to analyze the influence of different plant densities on growth, survival and the comparison of length and weight of tilapia (Oreochromis niloticus) in aquaponic system with dense plant. The experimental design used was Completely Randomized Design in time with three treatments and three replications with the level of density of vetiver (Vetiveria zizanioides) tested in this study was 400 g, 800 g and without vetiver. Nile tilapia (Oreochromis niloticus) was used with weight of 14 g, average length of 8-9 cm, and the experiment lasted for 42 days. The observed parameters was the growth of length and weight, length-weight relationship, and the survival rate. The results showed that the highest increase was in the treatment of 800 g vetiver plants with the growth of 19 g, the length increase of 2.64 cm and the survival rate of 100 ± 0.00 %. The lowest value was in the control. The use of aquaponic system in nile tilapia management with vetiver and control treatment had significant effect (P <0.05) on weight gain, length increase, and survival rate of tilapia. Water quality in all treatments generally reflected a range within tolerable limits and not harmful to tilapia growth.AbstrakBudi daya ikan nila dengan sistem akuaponik merupakan sistem budi daya yang dapat menghemat penggunaan lahan dan meningkatkan efisiensi pemanfaatan hara dari sisa pakan serta metabolisme ikan oleh tanaman. Penelitian ini bertujuan untuk menganalisis pengaruh padat tanaman yang berbeda terhadap pertumbuhan, sintasan dan perbanding-an panjang dan bobot ikan nila (Oreochromis niloticus) pada sistem akuaponik dengan padat tanaman yang berbeda. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan tiga perlakuan dan tiga kali ulangan dengan tingkat kepadatan vetiver yang diuji dalam penelitian ini adalah 400 g, 800 g dan tanpa vetiver. Ikan yang digunakan  adalah ikan nila dengan bobot 14 g, panjang rata-rata 8-9 cm, dan dipelihara selama 42 hari. Parameter yang diamati adalah pertumbuhan bobot, hubungan panjang-bobot, pertambahan panjang dan sintasan. Hasil peneli-tian menunjukkan bahwa peningkatan nilai tertinggi terdapat pada perlakuan tanaman vetiver 800 g dengan pertam-bahan bobot sebesar 19 g, pertambahan panjang sebesar 2,64 cm dan sintasan ikan sebesar 100±0,00 %. Nilai teren-dah terdapat pada kontrol. Penggunaan sistem akuaponik pada pemeliharaan ikan nila dengan perlakuan vetiver dan kontrol berpengaruh nyata (P<0,05) terhadap pertambahan bobot, pertambahan panjang, dan sintasan ikan nila. Kua-litas air pada semua perlakuan secara umum menggambarkan kisaran yang masih berada dalam batas toleransi dan tidak membahayakan bagi pertumbuhan ikan nila.