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LAJU DEKOMPOSISI SERASAH DAUN Avicennia marina DAN KONTRIBUSINYA TERHADAP NUTRISI DI PERAIRAN PANTAI SERAMBI DELI KECAMATAN PANTAI LABU Ronald Fadli Naibaho; Yunasfi Djayus; Ani Suryanti
AQUACOASTMARINE Vol 3, No 2 (2015): JURNAL AQUACOASTMARINE VOLUME 3, NO 2, APRIL 2015
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

The mangrove litter which has been decomposed contributes organic matter as food source for many species of fish and other organisms in the mangrove ecosystem. The purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know tThe purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know tThe purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know tThe purpose of this research is to know t The purpose of this research is to know tThe purpose of this research is to know t The purpose of this research is to know t The purpose of this research is to know the decomposition rate of A.marina litter leaf and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), and to know the nutrient content of carbon (C), nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) in nitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) innitrogen (N) and phosphorus P) in the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released the A. marina litter leaf which been released during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. during the decomposition time. This research was done at Serambi Deli Beach Deli Serdang Regency, North Sumatra Province during July until November 2014. This research used purposive sampling method at three stations and the determination of the station is done by seeing the availability of A. marina at the Serambi Deli Beach. The results showed that the decomposition rate of A. marina litter leaf on day 105 are 9,76 in stasiun I, 6,24 in station II and 7,28 in III station. The fastest decomposition rate is the station I with 9.76 and the slowest decomposition rate is the station II with 6,24. The nutrient of carbon during decomposition in 105 days are 20,45% at station I, 15,15% at station II and 26,5% at station III.Nutrient of nitrogen which beendecomposed on day 105 are 0,29% in station I, 0,51% in station II and 0,38% in station III. Nutrient of phosphorus during decomposition in 105 days are 0,19% in station I, 0,23% in station II and 0,26% in station III.Keywords : Serambi Deli Beach, Decomposition, Avicennia marina
ANALISIS ISI USUS IKAN TEMBANG (Sardinella fimbriata) PADA PERAIRAN PANTAI LABU KABUPATEN DELI SERDANG SUMATERA UTARA Gut Contents Analysis of Tembang Fish (Sardinella fimbriata) at Labu Beach Waterway Deli Serdang Regency North Sumatera Rebeka Paimaibot S; Yunasfi Djayus; Indra Lesmana
AQUACOASTMARINE Vol 3, No 3 (2015): JURNAL AQUACOASTMARINE VOLUME 3, NO 3, JUNI 2015
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

This study aims to investigate food habits of the species of tembang fish (Sardinella fimbriata) and the relationship of water quality parameters with the availability of natural food in Labu Beach. The study was done from Juli 2014, in Labu Beach. Fish samples, collected by gill net. Stomach content was analyzed using Index of preponderance. Stomach contents of the fish was consisted of 6 class of food Bacillariophyceae, Chlorophyceae, Dinophyceae, Crustaceae, fish’s egg and added some unidentified (such as foot and the cutting of insect body). The group of Bacillariophyceae is a main food, Chlorophyceae, Crustaceae and unidentified group is a complement food and than Dinophyceae and fish’s egg as additional food. The natural food has a good correlation with brightness.Keywords: Fish’s intestines contents, Sardinella fimbriata, Labu Beach, Gill Net.
KAJIAN ASPEK PERTUMBUHAN DAN LAJU EKSPLOITASI IKAN TERI NASI (Stolephorus spp.) DI PERAIRAN BELAWAN SUMATERA UTARA Aspects of Growth Study and Exploitation Rate Anchovy (Stolephorus spp.) in Belawan Waters of North Sumatra Zefri Ade Gurukinayan; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 3 (2015): JURNAL AQUACOASTMARINE VOLUME 3, NO 3, JUNI 2015
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Anchovy (Stolephorus spp.) is an abundant fishery resources in the watersof Indonesia. These fish include small pelagic fish. Until now, studies on thepopulation dynamics of anchovy is still low, especially in Belawan waters. Thisstudy aims to determine the aspects of growth and the rate of exploitation ofanchovy. Location of research conducted around Aquatic Belawan. Anchovytaken as much as 0.001% of catches depending on the abundance of each monthby taking 1-month intervals for 12 months. Analysis of data using a supportprogram Ms. Exel and software FISAT II Ver 1.1.0. The results showed that thelength of anchovy were captured during the study ranged 24.5-26.5 mm. Growthtype of anchovy is allometric positive. Factor in the range of conditions0.030396–0.318734. Alleged growth coefficient 0.890/year, maximum length(L∞) 39.18 mm and the theoretical age at the time of the fish length is equal tozero (t0) is -0.60. Total mortality 4.760, mortality catching 3.199 and naturalmortality 1.560. The rate of exploitation is 0.68 who is alleged to have occurredoverexploitation. This information can be used as the basis of the managementalternative arrangements fishing season, restrictions on catches, setting the meshso that the fish remain stable.Keywords: Anchovy, Pattern Growth, Exploitation, Management.
Uji Toksisitas Akut Ekstrak Daun Kamboja (Plumiera rubra L.) pada Ikan Nila Merah (Oreochromis niloticus) Acute Toxicity Test Extract Frangipani Leaves (Plumiera rubra L.) on the Red Tilapia (Oreochromis niloticus) Rangga Warsito; Yunasfi Djayus; Zulham Apandy Harahap
AQUACOASTMARINE Vol 3, No 3 (2015): JURNAL AQUACOASTMARINE VOLUME 3, NO 3, JUNI 2015
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Aquaculture is done highly intensive susceptible to outbreaks of diseas. The use of antibiotics in the prevention of bacterial diseases can cause negative effects to human health. Antibiotics can be replaced with the use of plant extracts containing antibacterial compounds, one of which frangipani leaves (Plumiera rubra L.). This study aims to determine the 96-hour LC50 value and safe concentration of frangipani leaf extract of red tilapia fish seeds. The study is divided into two stages, namely the preliminary test and the definitive test. Preliminary test was conducted to determine threshold concentrations above and below the threshold, where the concentration of the preliminary test is 0 ppm, 50 ppm, 100 ppm, 200 ppm, and 750 ppm. Definitive test using a concentration of 0 ppm; 98,40 ppm; 193,65 ppm; 381,10 ppm; and 750,00 ppm were obtained from calculations based on the threshold concentration of 750 ppm and below the threshold of 50 ppm. Percentage mortality of red tilapia in a preliminary test of the lowest to highest concentration of 3,33%; 16,67%; 46,67%; and 76,67%. Percentage mortality converted into the form used in the probit and probit analysis to obtain the 96-hour LC50 value of 510,63 ppm. Safe concentration of 10% of the LC50 within 96 hours, which is 50,2 ppm. In the 96-hour LC50 valuesindicate that the extract of frangipani leaf included in the category of moderate toxicity.Keywords : Plumiera rubra L., Oreochromis niloticus, LC50, phytochemistry
Kajian Morfometri Dan Karakteristik Kualitas Air Danau Siombak Kelurahan Paya Pasir Kecamatan Medan Marelan Kota Medan Morphometry study and Characteristics Water Quality of The Siombak Lake at Paya Pasir Wards Medan Marelan Sub District Medan city. Sarah Diba Sandy; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 3 (2015): JURNAL AQUACOASTMARINE VOLUME 3, NO 3, JUNI 2015
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

The Siombak lake is an artificial lake that formed as a result of sanddredging activities. The Siombak lake is near with the coast and influencedby ups and downs. The purpose from this study is to known themorphometry aspects of Siombak lake and to known the condition of theSiombak lake waters. This study was conducted over three months themonth of May to July 2014 in the waters of the Siombak lake, Paya PasirWards, Medan Marelan sub district, Medan City. The methods of research indata collection of morphometry is decisive for retrieval. The dimensionalsurface measurement is done by surrounding the periphery of the lake byusing a GPS (Global Positioning System) device. The subsurfacedimensional measurement carried out by measuring the depth of the topeweight scale that helped with the small ship. In the water sampling donethree time at five stations. Based on the results obtained, the Siombak lakehas a surface area of maximum length (Lmax) 740,3 meters, maximumwidth (Wmax) 708,3 meters. The Siombak lake also have depth maximum(Zm) of about 4-5 meters at high tide and 3-4 meters at low tide. TheSiombak lake waters quality with lightly polluted.Keyword : Siombak lake, Morphometry, Quality of Water.
FUNGSI FISIK MANGROVE SEBAGAI PENAHAN ABRASI DI PESISIR KOTA MEDAN PROVINSI SUMATERA UTARA (Physical Function of Mangrove as Retaining Abrasion at the Coastal of Medan, North Sumatra) Josephin Saut Sintong Panjaitan; Yunasfi Djayus; Zulham Apandy Harahap
AQUACOASTMARINE Vol 3, No 4 (2015): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

This research aims to determine the physical environmental or socio - economic of local community gives more dominant influence to damage the mangrove forest, changes of shoreline has been occurred from 2003 – 2014, changes of shoreline due to the influence of erosion at coastal of Medan and the dominant species of mangrove as retaining abrasion at coastal of Medan. Changes of Shoreline can be seen with the overlay method. This research uses field observation and interview to the local community directly. The results of research shows that socio - economic of local community gives more dominant influence than physical environmental to damage the mangrove forest. changes of shoreline has been occurred from 2003 – 2014 is about 57 meter. Based on field observation, many mangrove forest are converted into farm and many illegal logging has been occurred in the location of research.Keywords : Physical Function, Mangrove, Abrasion, Overlay, Shoreline
STRUKTUR KOMUNITAS MAKROZOOBENTOS DI DANAU PONDOKLAPAN DESA NAMAN JAHE KECAMATAN SALAPIAN KABUPATEN LANGKAT (Community Structure of Macrozoobenthos in Pondok Lapan Lake’s Desa Naman Jahe Kecamatan Salapian Kabupaten Langkat) Desy Ariska; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 4 (2015): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Makrozoobenthos can be used as bioindicators as it can determine the condition of a bodywater. This study focused on community structure of macrozoobenthos and measurement ofphysical and chemical factors. This study was conducted in January until March 2015.Macrozoobenthos retrived done using Eckman grabb, samples sorted using the Hand sorting.Samples were obtained identified in the Integrated Laboratory of USU. The highest density ofspecies found in Bithynia tentaculata were namely 48 ind / m2 was found in station I and thelowest in Campeloma decisum species were namely 6 ind / m2 was found at stations II andIV. The value of the highest diversity (H ') contained in the station III were namely 1.09 andthe lowest at station IV were namely 1.04. Habitat Similarity between stations based onphysical parameters that are most similar water chemistry contained in the station I and IIIwere namely 94%. Habitat Similarity between species are most similar to the station I and IIIwere namely 92%. Based on a Pondok Lapan lake’s LQI value categorized into pollutedwaters being were namely 3 and based on the FBI Pondok Lapan Lake’s category rather poorwaters that have were namely 6.Keywords : Pondok Lapan Lake’s, Community Structure, Macrozoobenthos
KAJIAN MORFOMETRI DANAU PONDOK LAPAN DESA NAMAN JAHE KECAMATAN SALAPIAN KABUPATEN LANGKAT (MORPHOMETRY STUDY OF PONDOK LAPAN LAKE DESA NAMAN JAHE KECAMATAN SALAPIAN KABUPATEN LANGKAT) Muhammad Ma’rufi; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 4 (2015): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Morphometry and water quality are primary data to assessing the potential of the lake.Morphometry data of lake is need in determining the lake’s layers and also determine theability to use by people. Pondok Lapan Lake is an artificial lake which located in Langkat.The purpose of this study was to determine the morphometric of aspects Pondok Lapan Lakeand determine the capacity that might be. The research was conducted from January untilMarch 2015. Data collection were performed in this research that were depth, stream flow,and around the lake are processed using ArcView. From the results, the lake morphometricaspects of wide Pondok Lapan Lake is around 63.472,78 m², the maximum length of 548,28m, 220,23 m maximum width, circumference 2.200,83 m, maximum depth of 4.15 m, with asloping bottom waters and shape of the lake bottom surface is irregular. And the capacity ofthe Pondok Lapan Lake which can be used by the public is 153.484,43 m³ of water volume,stream flow around 12.963,456 m³/day-14.111,712 m³/day, Recidance time of water about11-12 days, the brightness of the water approximately 0,965 m – 1,056 m with a depth ofcompensation approximately 2,612 - 2,858 mKeywords : Pondok Lapan Lake, lake morphometry, lake capacity
Struktur Komunitas Plankton di Danau Pondok Lapan Desa Naman Jahe Kecamatan Salapian Kabupaten Langkat (Structure Community Plankton in Pondok Lapan Lakedesa Naman Jahe Kecamatan Salapian Kabupaten Langkat) Fahmi Fadhli Rais; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 4 (2015): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

In aquatic ecosystems, plankton is a big role in the food chain. This is because therole of plankton as producers (phytoplankton) and first level consumer (zooplankton) in thewaters for other organisms that it can be used as a feeding including fish. This research isfocused on plankton for structure community and measurement of physical and chemicalfactors. This research was held in January-March 2015. The method of research is by usingpurposive random sampling to determine the station's for some intent and purpose. Thecarrying out of plankton did by using Van Dorn water sampler a modified water samplingand then filtered with a plankton net no. 25. The diversity of plankton in these watersclassified as the medium category with H '2.121 value. The types of plankton which found inhigh abundance is Scenedesmus, Chodatella and Ankistrodesmus. And from the types ofzooplankton are Cyclops, Branchionus and Nauplius. Based on its saprobic coefficient isknown that these waters classified as moderately polluted by 1,158 value and classified intothe phase of βmeso/oligosaprobik.Keywords : Pondok Lapan Lake, Structure Community, Plankton, Saprobik.
Struktur Komunitas Nekton di Danau Pondok Lapan Desa Naman Jahe Kecamatan Salapian Kabupaten Langkat (Community Structure of Nekton in Pondok Lapan Lake’s Desa Naman Jahe Kecamatan Salapian Kabupaten Langkat North Sumatera) Nurul Azmi; Yunasfi Djayus; Ahmad Muhtadi
AQUACOASTMARINE Vol 3, No 4 (2015): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Nekton is organism that can swim and move on their own accord with exampleamphibians and aquatic insect. This study aims to determine the structure of nektoncommunity and relation about physical and chemical conditions in the Lake Pondok Lapan .This study was carried out from January to March 2015. Data collection were nekton speciescomposition and abundance, as well as water quality data as a supporter. Nekton retrievalused fish nett and fishing rod. The results showed there were 5 of the Ordo, of which 4 ordobelongs to fish and 1 ordo of shrimp. Sepat rawa (Trichogaster trichopterus) was found to becaught at most in the amount of 141 and 56% relative abundance. Diversity nekton in PondokLapan lake including low at 1,95. General dominance index value approaching 0 is equal to0,23. It shows that almost no one species dominates. Value uniformity tends to 1. The figureshows the number of individuals of each type of deployment is the same. Pearson correlationanalysis results showed that temperature, depth, water transparancy, pH ,DO and COD has apositive correlation with the abundance of nekton while turbidity and COD have a negativecorrelation or do not have the relationship with the abundance of nekton.Keywords: Pondok Lapan Lake, Structure Comunity, Nekton.
Co-Authors Adenia Constansia Sitepu Ahmad Muhtadi Ahmad Muhtadi Rangkuti Ahmad Mutadi Ahmad Rizki Albino Panjaitan Amanatul Fadhilah Amrullah Angga Syahputra Anggia Dolly Sibuea Ani Suryanti Atikah Asry Aznia Marlina Sima Bill Maulana Bidawi Buana Sukri Tanjung Christina Sagala Cut Hannelida Eriza Daniel Abas Herman Silalahi Danra Siallagan Debi Debora Haro Dedi Pradana Desita Sari Br Ginting Desrita Desrita Desy Ariska Dewi, Rita Rosmala Dinarta Hutabarat Dizza Ayu Putri Dumaria R. M. L Tobing DWI SURYANTO Elisa Januarita Doloksaribu Ely Ermayani Endaiyana Libertyta Ester Nelya Tindaon Fahmi Fadhli Rais Fatimah Murni Febrina Arli Fina Fitriyani Friyuanita Lubis Gilang Pradifta S Green Alfath Siregar Hafiz Muhammad Henny Christien Horas M. C. Simatupang Huria Marnis Indah L. M Tambunan Indra Lesmana Josephin Saut Sintong Panjaitan M. Ridho Santoso M.Bobbie Jhora Waker MARAGUNUNG DALIMUNTHE Meia Ester Sela Ginting Meirani Ritonga Miswar Budi Mulya Muhammad Dafikri Muhammad Ma’rufi Muhammad Riza Kurnia Lubis Muhammad Rizky Nafi Sakila Nanda Mutia Hardianti Nisa Hidayati Nur Hidayah Nasution Nurasiah Riza Nurmatias Nurmatias Nurul Andrifa Nasution Nurul Azmi Ofi Sabrina Sitompul Pesta Saulina Sitohang Prasetia Ajitama Putri Ananda Tarigan Rahmad Ritonga Raissha Amanda Siregar Rangga Warsito Ratna Dewi Rebeka Paimaibot S Reza Alnanda Rika Wirani Rio Fentaria S Riri Ezraneti Risda Farida Lubis Romi Pindonta Tarigan Ronald Fadli Naibaho Rudi Hasonangan Siregar Rusdi Leidonald Sabilah Fi Ramadhani Saleha Bako Sangap Ginting Sarah Diba Sandy Sari Marina Saragi Sultan Akbar Habibullah Suria Masriani Sinaga Susanti Lawati Barus Syammaun Usman Tajuddin Siregar Tiur Natalia Manalu Ummi Febriani Ritonga Vinces Agriani Lase Vindy Rilani Manurung Yenni Ningsih Siringoringo Yudha Perdana Putra Lubis ZAINURI SYAM Zefri Ade Gurukinayan Zulham Apandy Harahap Zulkifli Nasution