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All Journal Peronema Forestry Science Journal Omni-Akuatika JURNAL PENDIDIKAN TAMBUSAI Journal Of Aquaculture Development and Environment
Yunasfi, Yunasfi
Manajemen Suberdaya Perairan, Universitas Sumatera Utara, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Environmental Science Social Sciences

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Uji Toksisitas Letal dan Subletal Logam Berat Merkuri (Hg) Terhadap Ikan Nilem (Osteochilus hasselti) Norman Arie Prayogo; Atik Hidayati; Asrul Sahri Siregar; Yunasfi Yunasfi
Journal Omni-Akuatika Vol 12, No 1 (2016): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (706.265 KB) | DOI: 10.20884/1.oa.2016.12.1.68

Abstract

Mercury (Hg) is a heavy metal could pollute the river. Hg impacts on aquatic organism chronically. The influence of chemical toxic on aquatic organisms could be determined using toxicity (lethal and sublethal) tests. Osteochilus hasselti could be an object for toxicity test. A research, aiming to find LC50-96h concentration, was to find letal and subletal effects of Hg on erythrocyte and hematocryte changes. An experimental method applied Completely Randomized Design. The research was devided into 3 stages, i.e. preliminary, lethal toxicity (LC50-96h) and sublethal toxicity tests, in triplicates. Sampling of sublethal test was performed after an exposure time of 96 h (4 days) and 288 h (12 days). Lethal toxicity test data were analyzed as probit and data from sublethal toxicity test were F-tested. The result showed that LC50-96h of Hg on Osteochilus hasselti was 0.39 mg/L. The sublethal effect of Hg decreased erythrocyte ad hematocryte counts in parallel with increasing its concentration and its exposure time.Keywords: Hg, toxicity, LC50-96 hours, erythrocytes, hematocrits.
IDENTIFIKASI FUNGI YANG BERKEMBANG PADA BATANG SAWIT (Elaeis guineensis Jacq.) Pasca Penebangan (Identification of fungi that developed in post-harvest oil palm trunk (Elaeis guineensis Jacq.)) Hisar panjaitan; Ridwanti Batubara; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 2, No 1 (2013): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.864 KB)

Abstract

The research aims to know the kinds of fungi that grow on palm trunk after logging in the process of rejuvnation of palm. The research was conducted in Kebun Percobaan Tambunan A Universitas Sumatra Utara. Fungi isolated and identified in Microbiology Laboratory of the Department of Biology Faculty of Mathematics and Natural Sciences, University of North Sumatra. The research was conducted from September 2011 until November 2011. The results obtained, four types of fungi found on oil palm trunks that have been process of rejuvnation, wich is taken from four palm  as a sample. for each palm trunk, made ​​a division at the base of the trunk, middle, and end of the trunk. From the results of isolation obtained the Arthrinium phaespermum, Chaetomium brasiliense, Penicillium simplicissimum and Ulocladium botrytis as a result of identification from the sample. The type of fungi that most identified from the palm trunk is a type of fungi Arthrinium phaeospermumKey words : Elaeis guineensis Jacq, Fungi, Palm trunks
The Diversity of Macroscopic Fungi in The Education Forest of University of Sumatera Utara, Tongkoh Village, Karo District, North Sumatra Province Santa Dewi Bornok Mariana Tampubolon; Budi Utomo; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 2, No 1 (2013): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (349.563 KB)

Abstract

The research of the diversity of macroscopic fungi in Education Forest of University of North Sumatra has never been reported. The research has been conducted at altitude: < 1000 m above sea level; 1000 – 1500 m above sea level; and ≥ 1500 m above sea level, on five different trail on each altitude category. The length of observation trail is 100 m. The first trail on each altitude category is determined with purpossive sampling method, then the next trail was determined with systematic sampling method. The observation and the collection of species has done exploratively in the plot sampling, size 20 m x 20 m. The results showed that was found 45 species of macroscopic fungi which consist of 2 divisions, 4 classes, 10 orders, and 19 families, where numbers of species of macroscopic fungi was found on each of altitude category consecutively 30 species; 42 species; and 32 species. The macroscopic fungi was found commonly living on the decayed wood and litter, and then a part of living on the living wood. Keywords : Macroscopic fungi, diversity of macrofungi, Basidiomycota, Education Forest of University of North Sumatra.
Analisis Kelayakan Finansial dan Strategi Pengembangan Pembibitan Mangrove di Desa Percut, Kecamatan Percut Sei Tuan, Kabupaten Deli Serdang Rijal F Banjarnahor; Agus Purwoko; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 2, No 2 (2013): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (339.841 KB)

Abstract

The aim of this research were to know the process and tecnique of mangrove nursery, the level of financial feasibility of mangrove nursery and to knew the development strategy of mangrove nursery business. The method of data collecting of this research was interview and observation. The evaluation of financial analysis was done by production cost and revenue analysis. Then was followed by analysis of R/C ratio and Break Event Poin (BEP), and the development strategy analysis was used SWOT analysis. The result show that the techniques of nursery was done by tradisional way. The nursery stage area: selection of place, nursery place, fruit selection, manufacture of seedlings and maintenance of seedling. The business of mangrove nursery feasible to run due to the R/C ratio more than one. The R/C ratio for R. Stylosa, R. Apiculata, Soneratia, Bruguiera sp. Were 1,2642, R. Mucronata was 2,4737 and A. Marina was 1,1939. Based on the SWOT analysis, the current position of the mangrove nursery rides was in quadrant III. It showed that business of mangrove nursery was many threat, but had a great opportunity to develop. Keywords: Mangrove, nursery, financial analysis, SWOT
Analisis Karakteristik Pohon dan Sarang Orangutan Sumatera (Pongo abelii) di Bukit Lawang Kabupaten Langkat (Analysis of the Trees and Nest Characteristics of Sumatran Orangutan (Pongo abelii) in Bukit Lawang, Langkat District) Muhammad Rifai; Pindi Patana; Yunasfi Yunasfi
Peronema Forestry Science Journal Vol 2, No 2 (2013): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (331.125 KB)

Abstract

Research on "Analysis of the Trees and Nest Characteristics of Sumatran Orangutan (Pongo abelii) in Bukit Lawang Langkat District" was conducted in July until September 2012 at Pusat Pengamatan Orangutan Sumatera (PPOS) in Bukit Lawang, Bahorok, Langkat District. This study aims to investigate the characteristics of the nest tree and Sumatran Orangutan (Pongo abelii) based on age level and gender. Research method used line transect and focal animal sampling. Some characteristics of the Orangutans trees most often found in meranti trees (Shorea sp.) as Orangutans nest and feed, with hight 20-25 m, diameter 20-30 cm, branch pattern is adjacent and type of canofy is spherical, nest high 16-25 m. The position of the nest is most commonly found nesting in position III and nest type is B. There are differences and similarities between Orangutan who were subjected to experiments in determining the type of nest trees, nest trees high, nest trees diameter, nest high and position of nest. Keyword: Nest, Pongo abelii, Shorea sp., Sumateran Orangutans Trees and nest characteristic. Analisis Karakteristik Pohon dan Sarang Orangutan Sumatera (Pongo abelii) di Bukit Lawang Kabupaten Langkat Analysis of the Trees and Nest Characteristics of Sumatran Orangutan (Pongo abelii) in Bukit Lawang, Langkat District
INVENTARISASI TUMBUHAN ANGGREK DI KAWASAN SUAKA MARGASATWA SIRANGGAS KABUPATEN PAKPAK BHARAT (INVENTORY OF ORCHIDS IN SIRANGGAS WILDLIFE PAKPAK BHARAT) Dasma Banurea; Yunasfi Yunasfi; Pindi Patana
Peronema Forestry Science Journal Vol 4, No 2 (2015): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (959.041 KB)

Abstract

Indonesia's tropical forests is one of the richest in natural resources of orchids. North Sumatra is a suitable place for growing orchids. This study aims to inventory the orchids based on altitude in Siranggas Wildlife Kecupak I Village, Pergetteng-getteng Sengkut Subdistrick, Pakpak Bharat. Plots were determined by purposive sampling. The Observation of vegetation used line plot transect which divided in 3 locations with different altitude interval : 800 – 900 meter above sea level (m asl), 1.000 – 1.100 m asl and  1.200 – 1.300 m asl, measuring plot 20 m x 100 m, divided in to 5 subplots measuring 20 m x 20 m. The result found 54 species of orchids at Siranggas Wildlife from 21 genus, which there were 15 species of terrestrial orchids, 37 species of epiphytic orchids and 2 species os saprophyte. The highest of important value index (IVI) was 41,722% on Dendrobium tertraedre and the lowest was 0,884% on Vanilla sp. 1, Vanilla sp. 3 and Phaius sp 1. Keywords: Orchid, Inventory, Siranggas Wildlife
Growth Parameter of Baung Fish (Mystus nemurus Cuvier Valenciennes) in Bingai River, Binjai City, North Sumatera Vindy Rilani; Yunasfi Yunasfi; Desrita Desrita
Journal of Aquaculture Development and Environment Vol 3, No 1 (2020): Journal Of Aquaculture Development And Environment
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jade.v3i1.2335

Abstract

Pengelolaan Hutan Mangrove Berbasis Silvofishery di Kecamatan Percut Sei Tuan, Kabupaten Deli Serdang Sutan Sahala Muda Marpaung; Yunasfi Yunasfi; Mohammad Basyuni
Jurnal Pendidikan Tambusai Vol. 6 No. 2 (2022): Agustus 2022
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (579.698 KB)

Abstract

Tujuan penelitian ini adalah untuk mendapatkan model terbaik dari model pengolahan yaitu, model empang parit tradisional, komplangan, kao-kao, empang terbuka, tasik rejo dalam pengelolaan lahan mangrove dengan tambak yang berbasis silvofishery di Desa Bagan Percut Kecamatan Percut Sei Tuan, Kabupaten Deli Serdang. Metode yang di gunakan dalam penelitian ini ialah menggunakan Data Primer dan data Sekunder untuk medapatkan Analisis Deskriptif. Model dan pengelolaan tambak yang terbaik dimana terdapat di Desa Tanjung Rejo dibandingkan dengan Desa Percut dan Desa Tanjung Selamat, dengan Model Kao-Kao yang memiliki kriteria dari segi pengelolaan tata air, tanaman mangrove yang ditanam hingga proses produksi. Pemanfaatan tanaman mangrove sebagai habitat benih ikan, udang, dan kepiting untuk hidup dan mencari makan serta daunnya untuk pakan ternak sampai proses produksi yang dilakukan sangat teratur dan terjaga kualitasnya.
Co-Authors Ahmad Muhtadi Ahmad Muhtadi Ani Suryanti Asrul Sahri Siregar Atik Hidayati Budi Utomo D. Ariska Dasma Banurea Desrita Desrita Desrita Desrita F. F. Rais Hisar panjaitan Kusuma Widya Sari Mohammad Basyuni Muhammad Rifai N. Azmi Norman Arie Prayogo Pesta Saulina Sitohang Pindi Patana Purwoko, Agus Ridwanti Batubara Rijal F Banjarnahor Santa Dewi Bornok Mariana Tampubolon Vindy Rilani Manurung Yenni Ningsih Siringoringo