Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Department of Naval Architecture Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Sains Teknologi dan Lingkungan (JSTL)
Arif Rahman
Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik Fakultas Perikanan Dan Ilmu Kelautan Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Environmental Science Public Health

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
FAKTOR BIOKONSENTRASI PESTISIDA ORGANOKLORIN (ALDRIN, DIELDRIN DAN LINDANE) DALAM JARINGAN LUNAK KERANG DARAH (Anadara granosa Linn.) Haeruddin Haeruddin; Arif Rahman; Diah Ayuningrum
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 16, No 1 (2020): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (781.606 KB) | DOI: 10.14710/ijfst.16.1.45-50

Abstract

Kerang darah merupakan salah satu jenis kekerangan yang bernilai ekonomis penting.  Habitat kerang darah yang mengandung pestisida organoklorin dapat menurunkan nilai ekonomis kerang, dikarenakan pestisida organoklorin dapat terakumulasi dalam jaringan lunak kerang, sehingga tidak aman untuk dikonsumsi. Penelitian ini dilakukan untuk menentukan potensi biokonsentrasi pestisida organoklorin dalam jaringan lunak kerang darah ditilik dari faktor biokonsentrasi pestisida tersebut.  Penelitian dilakukan dengan memelihara kerang darah dalam sedimen yang mengandung pestisida pada beberapa akuarium. Sedimen diambil dari Muara Sungai Wakak-Plumbon, Jawa Tengah. Hasil penelitian menunjukkan bahwa pestisida organoklorin mampu terakumulasi dalam jaringan lunak dengan faktor biokonsentrasi yang berbeda untuk masing-masing jenis pestisida organoklorin.  Faktor biokonsentrasi pestisida organoklorin tertinggi pada pestisida lindane.  Faktor biokonsentrasi pestisida terendah adalah aldrin. Blood clams are one type of clams which have important economic value. Habitat of blood clams mostly contain organochlorine pesticides which then reduce their economic value.  The organochlorine pesticides can accumulate in the blood clams soft tissue, making it unsafe to consume. This research was conducted to determine the accumulation potential of organochlorine pesticides in the soft tissue of blood clams from the bioconcentration factor of these pesticides. The study was conducted by maintaining blood shells in sediments containing pesticides in several aquariums. Sediments were taken from the Wakak-Plumbon River Estuary, Central Java. The results showed that organochlorine pesticides were able to accumulate in soft tissues with different bioconcentration factors for each type of organochlorine pesticide. The highest biochemical concentration of organochlorine pesticides is in lindane pesticides. The lowest bioconcentration factor of pesticides is Aldrin.
SEBARAN SPASIO TEMPORAL KELIMPAHAN FITOPLANKTON DAN KLOROFIL-A DI PERAIRAN UJUNG KARTINI JEPARA (Spatial and Temporal Distribution Abundance of Phytoplankton and Chlorophyll-a in Ujung Kartini Waters Jepara) Muchtar Yulianto; Max Rudolf Muskananfola; Arif Rahman
Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Vol 14, No 1 (2018): SAINTEK PERIKANAN
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (649.767 KB) | DOI: 10.14710/ijfst.14.1.1-7

Abstract

Perairan Ujung Kartini merupakan perairan yang menjadi muara dari Sungai Wiso dan Sungai Kanal yang terletak di sisi barat Kabupaten Jepara. Di sekitar Perairan Ujung Kartini terdapat kegiatan manusia yang dikhawatirkan dapat menyebabkan perubahan kualitas air terutama kandungan unsur hara. Perubahan kandungan unsur di perairan akan berdampak terhadap persebaran dan kelimpahan fitoplankton serta konsentrasi klorofil-a. Penelitian ini bertujuan untuk mengetahui tingkat kesuburan perairan dan hubungan antara kelimpahan fitoplankton dengan konsentrasi klorofil-a. Penelitian dilakukan pada bulan November dan Desember 2017. Penelitian ini termasuk jenis penelitian analisis deskriptif dan penentuan lokasi sampling menggunakan metode purposive sampling. Pengambilan sampel air dan fitoplankton dilakukan di tiga stasiun yang ditentukan berdasarkan tinggi rendahnya kegiatan manusia. Pengambilan sampel tersebut dilakukan pada saat kondisi pasang dan surut dengan dua kali pengulangan. Hasil penelitian yang diperoleh menunjukan bahwa kelimpahan fitoplankton pada saat pasang dan surut berkisar antara 6.375 – 13.725 sel/l dan konsentrasi klorofil-a pada saat pasang dan surut berkisar antara 0,126 – 1,392 mg/m3. Nilai diatom quotient sebesar 1,533 yang berarti perairan yang diteliti termasuk ke dalam kategori perairan eutrofik. Kelimpahan fitoplankton dan konsentrasi klorofil-a pada saat pasang lebih tinggi daripada saat surut. Keduanya mempunyai hubungan yang sangat erat. Ujung Kartini Waters is part of the estuary of the Wiso River and Kanal River which are located on the west side of Jepara Regency. In the surrounding area, there are human activities that are feared to cause changes in water quality, especially nutrient content. Changes in nutrients content in the waters will have impact on the distribution and abundance of phytoplankton and concentration of chlorophyll-a.  This study aims to determine the level of aquatic productivity and the relationship between phytoplankton abundance with chlorophyll-a concentration. The study was conducted from November to December 2017. This research includes descriptive analysis and determination of sampling location using purposive sampling method. Samples of water and phytoplankton were collected at three stations based on the level of human activity. Sampling was carried out during high tide and low tide with two repetitions. Based on the results of the research, the abundance of phytoplankton at high and low tides ranged between 6.375 - 13.725 cells/l and chlorophyll-a concentrations at high and low tides ranged between 0,126 – 1,392 mg/m3. The value of diatom quotient is 1,533 which means that the waters of study area belong to the eutrophic category. The abundance of phytoplankton and concentrations of chlorophyll-a at high tide is higher than at low tide. Both show a high level relationship.
KAJIAN TEKNIS DAN EKONOMIS KAPAL IKAN TRADISIONAL 10 GT DIPERAIRAN KENDAL Arif Rahman; Ari Wibawa Budi Santosa; sarjito jokosisworo
Jurnal Teknik Perkapalan Vol 2, No 4 (2014): Oktober
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (549.917 KB)

Abstract

Perairan  laut  di Kabupaten  Kendal  mempunyai  kekayaan sumber daya jenis ikan dengan hasil tangkapan yang  dominan  dan  bernilai  ekonomis  tinggi salah satunya   Teri. Kebanyakan para nelayan Kendal terutama di Desa Sendangsikucing, Kecamatan Rowosari dan Kabupaten Kendal menggunakan kapal ikan 10 GT beralat tangkap mini waring. Dalam penelitian ini dimulai dengan tahapan pencarian data ukuran utama kapal yang dijadikan model untuk menghitung stabilitas kapal dan olah gerak kapal. Tahapan selanjutnya yaitu dengan mencari data biaya investasi yang meliputi biaya pembangunan kapal, biaya operasional kapal dan biaya pendapatan kapal untuk perhitungan BEP (break event point). Untuk perhitungan stabilitas yang mengacu pada aturan IMO dengan Code A.749(18) secara keseluruhan menunjukan bahwa stabilitas dari model kapal ikan ketiganya telah memenuhi standart kriteria yang ditetapkan oleh IMO. Untuk analisa Olah Gerak dari ketiga kapal tersebut yang mengalami deckwetness hanya satu  yaitu  pada kondisi rolling dengan sudut 900 nilai amplitudo paling besar.  Untuk perhitungan ekonomis biaya investasi dalam pembuatan kapal KMN.Sido Waras sebesar Rp 422.132.000,- . Keuntungan  bersih pemilik kapal pada tahun pertama 2012 Rp 317.880.000,00 dan pada tahun kedua 2013 Rp 430.000.000,-. Sehingga dapat disimpulkan BEP (modal akan kembali) pada trip ke 220 atau tahun ke 2 bulan ke 3.
Laju Nitrifikasi pada Bioremediasi Air Limbah Organik Menggunakan Chlorella sp. dan Bakteri Nitrifikasi-Denitrifikasi Arya Ksatria Fernanda Hendrawan; Norma Afiati; Arif Rahman
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 11 No. 2 (2021): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.11.2.309-323

Abstract

Global nitrogen pollution in the aquatic environment has been increased mostly due to the disposal of organic wastewater from human activities. Chronic disposal of nitrogen compounds into the waters causes eutrophication and death of aquatic organisms. Process of reducing nitrogen in wastewater can be carried out economically and efficiently using nitrifying-denitrifying bacteria. Beside that, another environmentally friendly technology that can also be used is bioremediation using microalgae such as Chlorella sp. The synergistic relationship between bacteria and microalgae has a potential to better reduce performance of nitrogen compounds in organic wastewater. This study, which was conducted from July to August 2020, was laboratory experiment using randomised block design. It aimed to determine growth rate of Chlorella sp., rate of nitrification, rate of changes of nitrate compounds, effect of differences between treatments and duration of the changes of nitrate levels in organic wastewater as also relationship between Chlorella sp. to the nitrifying-denitrifying bacteria. Fresh wastewater samples were taken from Lake Rawa Pening. The results showed that growth pattern of Chlorella sp. has increased until the peak day (day 6) then decreased toward day 9. The highest nitrification rate was performed by treatment C, i.e., 0.2 mg NH4-N.l-1.hour-1 followed by treatment B, D and A respectively, 0.169, 0.009 and 0.008 mg NH4-N.l-1.hour-1. Similarly, the highest percentage change in nitrate compounds during the study was treatment C (1874%), B (1664%), D (200%) and A (175%) subsequently. The analysis of variance between treatment for changes in nitrate compounds was significantly different (p value <0.05). A further DMRT/Duncan Multiple Range Test showed that the highest average was also treatment C, B, D and A.
Kelimpahan Dan Distribusi Fitoplankton Di Wilayah Perairan Mangrove Morosari, Demak: Abundance And Distribution Of Phytoplankton In The Mangrove Water, Morosari, Demak Oktavianto Eko Jati; Arif Rahman; Kukuh Prakoso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 8 No. 1 (2022): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v8i1.315

Abstract

The Demak area is an area that has changed its ecological function from land to water. This area has a mangrove ecosystem which is a conservation area. The fertility of the mangrove ecosystem is supported by the presence of nutrients in the waters. Nutrients in the waters will also affect the abundance and distribution of phytoplankton. The purpose of this study was to determine the levels of nitrate, phosphate, and the abundance and distribution of phytoplankton in the Morosari Demak mangrove conservation waters, and to determine the relationship between the abundance of phytoplankton and the levels of nitrate and phosphate in the waters. This research was carried out in May 2018 in the Morosari waters area, Demak. The sampling location consisted of 6 stations. The variables measured in this study included dissolved oxygen, pH, salinity, water temperature, nitrate, phosphate, and abundance of phytoplankton. The results showed that dissolved oxygen levels ranged from 2.18-6.11 mgL-1, pH 6.12-7.38; salinity between 18.43-31.84 o/oo; water temperature between 27.18 - 30.43 °C, nitrate 0.0029-0.2495 mgL-1; phosphate 0.0013-0.11 mgL-1. The abundance of phytoplankton obtained from this study ranged from 5,700 – 24,942 cells L-1. The dominant type of phytoplankton came from the genus Guinardia (diatom class/Bacillariophyceae) which was found in all research sites
Co-Authors Ari Wibawa Budi Santosa Arya Ksatria Fernanda Hendrawan DIAH AYUNINGRUM Haeruddin Haeruddin Kukuh Prakoso Max Rudolf Muskananfola Muchtar Yulianto Norma Afiati Oktavianto Eko Jati Sarjito Jokosisworo