Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Aquacoastmarine
Yunasfi Djayus
Unknown Affiliation
Other

Published : 81 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 81 Documents
Search

 5   6   7   8   9 
PENGARUH EKSTRAK DAUN Sonneratia alba TERHADAP INFEKSI BAKTERI Aeromonas hydrophila PADA IKAN NILA The Effect of Sonneratia alba Leaf Extract on Aeromonas hydrophila Bacterial Infection in Tilapia Dumaria R. M. L Tobing; Yunasfi Djayus; Nurmatias Nurmatias
AQUACOASTMARINE Vol 5, No 3 (2017): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.776 KB)

Abstract

Motile Aeromonas Septicemia (MAS) is a disease that attacks on the tilapia fish farming, both in the phase of seed and adult. One of alternative to prevent disease by using the extracts from mangrove plants. The aims of this study was to determine the effectiveness of Sonneratia alba leaf extract in tackling MAS disease in Nila fish and to determine the dose of S. alba extract on Tilapia fish. The extraction from S. alba leaves was made into powder form and then combined with artificial feed type FF-999. The LD50 test was performed on Nila fish for 24 hours. This study used Completely Randomized Design with four treatments: P0 (without of extract S. alba), P1 (1% extract S. alba), P2 (2% extract S. alba), P3 (3% extract S. alba). The results showed that the treatment of P1 and P2 could inhibit the growth of A. hydrophila.Keywords : Sonneratia alba, Tilapia, Antimicrobial Activity, Aeromonas hydrophila.
DEKOMPOSISI SERASAH MANGROVE Avicennia alba KONTRIBUSINYA TERHADAP NUTRIEN PERAIRAN DI DESA BAGAN ASAHAN KECAMATAN TANJUNGBALAI KABUPATEN ASAHAN PROVINSI SUMATERA UTARA Nur Hidayah Nasution; Yunasfi Djayus; Zulham Apandy Harahap
AQUACOASTMARINE Vol 5, No 3 (2017): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (413.462 KB)

Abstract

Organic mangrove material is mostly used as a detritus such mangrove leavesthat fall throughout the year. Organic particles or litter become living places for bacteria, fungi and other microorganisms. The objective research was to measure decomposition and know the nutrient content of carbon (C) nitrogen (N) and phosphorus (P) leaf litter A. alba released during decomposition in Bagan Asahan Village, Tanjungbalai Sub-district of Asahan Regency. The study was conducted from February to April 2017 using purposive sampling method by looking availability of A. alba Bagan Asahan Village. Result of highest carbon nutrient content (C) station I 18,85% lowest station III 11,58%. The highest nitrogen (N) station III 2, 62% lowest station II 2,29%. The highest phosphorus (P) with the same value station III 0,03% lowest station II 0,01%. Highest C/N station results station III 6,44% lowest station II 4,70%. Dry weight of litter decreased period during the 90 days of the highest average station II 21,70 g lowest station II 2,13 g compared with the initial weight of 50%. The highest value decomposition rate between station III 2,81 lowest value 0,52. The highest average value decomposition rate (k) station I e.i. 41,70 lowest station III e.i. 1,66.Keywords: Avicennia alba, Bagan Asahan Village, Decomposition, Element Nutrient, Leaf Litter, Mangrove.
STRUKTUR KOMUNITAS UDANG DI PERAIRAN EKOSISTEM MANGROVE DESA BAGAN ASAHAN KECAMATAN TANJUNGBALAI KABUPATEN ASAHAN PROVINSI SUMATERA UTARA Nurasiah Riza; Yunasfi Djayus; Ani Suryanti
AQUACOASTMARINE Vol 5, No 3 (2017): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (426.983 KB)

Abstract

The condition of mangrove in Asahan regency is currently under pressure due to its utilization and less concern management in sustainability aspects. The decrease of mangrove area will have a direct impact for fishery resources especially shrimp. The purpose of this research was to know about community structure of shrimp in Ecosystem mangrove waters of Bagan Asahan Village, Tanjungbalai District, Asahan Regency, North Sumatera Province. This research was conducted for 3 months from March – May 2017. The method of this research used purposive sampling and determined 3 stations sampling that was near tourist and settlement area, estuary and toward beach. There were 8 shrimp found in ecosystem mangrove. Metapenaeus lysianassa had highest abundance of 38%, Penaeus merguiensis 33%, Metapenaeus affinis 16%, Macrobrachium equidens 9%, Leptocarpus potamiscus 1%. Penaeus monodon, Exopalaeomon styliferus and Squilla mantis had lowest abundance with value 0%. The value of Diversity Index (H') of shrimp ranged from 1.027 to 1.447, the value of Evennes Index ranged from (E) 0.741 to 0.964 and the Dominance Index (D) ranged from 0.271 to 0.402.Keyword: Bagan Asahan, Coummunity Structure, Shrimp
KOLONISASI FUNGI PADA PROSES DEKOMPOSISI SERASAH DAUN Rhizophora mucronata BERDASARKAN TINGKAT SALINITAS DI KECAMATAN HAMPARAN PERAK KABUPATEN DELI SERDANG Nafi Sakila; Yunasfi Djayus; Ani Suryanti
AQUACOASTMARINE Vol 5, No 3 (2017): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.517 KB)

Abstract

R. mucronata is the dominan type of mangrove that grown in Hamparan Perak district. Mangrove’s litter that fall into the forest floor will be decomposed therefore it is involved the microorganism role such as fungi to produce nutrient in the waters. Fungi are the main decomposers in the decomposition of mangrove leaves. The purpose of this research is to know the population and the frequency of fungi colonization, hence to examine the number of species and index of fungi diversity in R. mucronata leaf litter at various levels of salinity. This research was conducted in February – June 2017. Purposive sampling is done by determine the 3 point observation station based on salinity difference. The results of this study show that the highest fungi population is at station 2 with salinity level 9 – 16 ppt ie 30,50 × 102 cfu / ml. The frequency of fungi colonization on the highest litter decomposition process is the type of Aspergillus. The highest number of fungi species is salinity level 1 – 8 ppt as many as 14 types of fungi. The diversity index of fungi type in Hamparan Perak district indicates the same range that is moderate which is describes adequate productivity, balance ecosystem and ecological pressure.Keywords: Mangrove, Leaf Litter, Rhizophora mucronata, Decomposition, Fungi, Nutrient of aquatic, Hamparan Perak District
KEPADATAN EPIFAUNA DI LINGKUNGAN MANGROVE DESA LUBUK KERTANG KECAMATAN BRANDAN BARAT KABUPATEN LANGKAT PROVINSI SUMATERA UTARA Buana Sukri Tanjung; Yunasfi Djayus; Tajuddin Siregar
AQUACOASTMARINE Vol 6, No 1 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (448.79 KB)

Abstract

The mangrove ecosystem is a system in nature where life that reflects the mutual relationship between living creatures and their environment, affected by the tides of sea water and is dominated by species of trees or shrubs that are distinctive and able to grow in salty / brackish waters. This research was conducted by using Purposive Sampling method to know Epifauna Density in Environment Mangrove Lubuk Kertang Village. The results of this study indicate that the highest density of Cerithidea alata species (9500 ind / ha) because this species is native to mangrove forest and as a predator. Temperature ranges from 27-32 oC. Based on the Morisita Index the dispersion pattern by clumping.Keywords: Mangrove Ecosystem, Density, Epifauna
DEKOMPOSISI SERASAH DAUN Sonneratia alba DAN ANALISIS UNSUR HARA C N DAN P DI PERAIRAN DESA SEI SAKAT KECAMATAN PANAI HILIR KABUPATEN LABUHAN BATU PROVINSI SUMATERA UTARA Ratna Dewi; Yunasfi Djayus; Amanatul Fadhilah
AQUACOASTMARINE Vol 6, No 1 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (521.453 KB)

Abstract

Mangrove leaves have decomposition process that gives donation of organic material is a source of food for various types of biota, other organisms in mangrove ecosystem. The objectives of this study were to count the decomposition rate of Sonneratia alba litter at each station, and count the percentage of carbon nutrient content (C), Nitrogen (N), Phosphorus (F) and C / N Ratio at each station location. The research was conducted in Sei Sakat Village, Panai Hilir Sub-district, Labuhan Batu District, North Sumatera Province conducted from March to May 2017. The research station was determined by purposive sampling method at three stations with station determination based on the availability of Sonneratia alba mangrove type in Sei Sakat Village. The results showed that the decomposition rate decreased the highest litter weight of station I (30,09 g/day) while the lowest station III (7,272 g/day). Carbon (C) content during the 90 days carbon-highest decomposition process of station III (18,80%) while the lowest station I (14,87%). Nitrogen (N), the highest station nitrogen day I and III (2,95%) while lowest station II (2,50%) and Phosphorus (P), the highest Phosphorus station III (0,29%) while lowest station I (0,20%)while the ratio of C/N during peroses decomposition of 90 days that is the highest ratio of station II (7,009%).Kata kunci : Dekomposisi, Analisis unsur hara, Daun Sonneratia alba.
POTENSI MAKROFAUNA AKUATIK EKOSISTEM HUTAN MANGROVE DI KAWASAN PESISIR DESA KAMPUNG NIPAH SEI NAGALAWAN KECAMATAN PERBAUNGANKABUPATEN SERDANG BEDAGAI Ummi Febriani Ritonga; Yunasfi Djayus; Indra Lesmana
AQUACOASTMARINE Vol 6, No 1 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.876 KB)

Abstract

Kampung Nipah Sei Nagalawan Village is a marine biota producer area such as aquatic macrofauna and mangroves. Villagers of Sei Nagalawan generally have livelihoods as fishemen. Their lives depend on seafood obtained through both fishing and cultivation. So the need to increase the potential problems against the biota. However, from excessive community activity on mangroves can damage the ecosystem so that there is a physical decline and water quality degradation of the mangrove ecosystem. This study aims to analyze the level of abundance, biomass, diversity and evenness and to analyze the pattern of the spread of aquatic macrofauna around the mangrove. This research was conducted in March – May 2017. This research was conducted by survey method and sampling was done by purposive sampling method. The results showed that the condition of aquatic macrofauna in the mangrove area of Kampung Nipah Sei Nagalawan was rare and the macro-aquatic macrofauna pattern was very minimal due to the large number of mangrove land that was damaged to reduce the habitat for the biota.Keywords : Mangrove, Aussiatic Macrofauna, Nipah Villege, Sei Nagalawan Village, Serdang bedagai
KOLONISASI FUNGI PADA SERASAH DAUN Avicennia marina DI DESA NELAYAN SEBERANG KECAMATAN HAMPARAN PERAK KABUPATEN DELI SERDANG SUMATERA UTARA Risda Farida Lubis; Yunasfi Djayus; Amanatul Fadhilah
AQUACOASTMARINE Vol 6, No 2 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (671.165 KB)

Abstract

The village of Paluh Kurau is a village located in Hamparan Perak District in Belawan, North Sumatera. The village is located opposite the harbor, the amount of benefits found in the mangrove forest ecosystem makes it highly vulnerable to environmental degradation and community activities and port activities near the village of Paluh Kurau. This study aims to determine the type of fungi contained in leaf litter Avicennia marina in Nelayan Seberang Village Hamparan Perak District Deli Serdang District of North Sumatera. This study was conducted in January-March 2017. The results showed that the type of fungi found in Avicennia marina leaf litter in Nelayan Seberang Village Hamparan Perak Subdistrict Deli Serdang District of North Sumatera there are 12 types of fungi namely Culvularia lunata, Fusarium sp., Fusarium verticilliodes, Aspergillus sp. 1, Aspergillus sp. 2, Aspergillus niger, Trichoderma harzianum, Pestalotia sp., Penicilium sp., Scytalidium lignicola, unidentified fungi 1, and unidentified fungi 2.Keywords: Mangrove, Leaf Litter, Avicennia marina, Village of Nelayan Seberang, Hamparan Perak
KONDISI DAN UPAYA PELESTARIAN HUTAN MANGROVE YANG BERBASIS PENDEKATAN MASYARAKAT DI KECAMATAN PERCUT SEI TUAN KABUPATEN DELI SERDANG SUMATERA UTARA Dizza Ayu Putri; Yunasfi Djayus; Rita Rosmala Dewi
AQUACOASTMARINE Vol 6, No 2 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.026 KB)

Abstract

Ecosystem of mangroves forest in the District of Percut Sei Tuan has a number of conversion that effected by aquaculture activities namely shrimp farming, then plantation activities such as palm oil plantation. Furthermore, the most utilization of mangrove that is done by society such as wood fuel and charcoal production. It causes permanent mangrove destruction and reduction in mangrove area which is lead to decrease in ecological function and benefit of mangrove ecosystem. The purpose of this study is to determine the condition and the dominant species of mangrove, hence how the coastal society effort in dealing with mangrove forest destruction. This research was conducted in May - June 2017. The research was conducted by survey method and purposive sampling. The result showed that mangrove condition in Percut Sei Tuan Subdistrict of Deli Serdang Regency was in rare state. And also found the most widely Plants of Nipah up to 2.000 Tree/ha. Condition of water parameters (temperature, salinity, pH) fulfill the quality standard of Decree of LH No. 51 of 2004. The value of mangrove landform changes as much as 64% which is used as palm oil plantation and 36% used as pond area and the utilization of mangrove as fishing (fish, shrimp, crab, et all) and charcoal fuel which resulted in decreasing of mangrove land in Percut Sei Tuan Subdistrict of Deli Serdang Regency of North Sumatera.Keywords : Mangrove, Transformation area, Sub-district Percut Sei Tuan, Deli Serdang district
PENGUJIAN EKSTRAK DAUN KECOMBRANG (Nicolaia speciose Horan) SEBAGAI PENCEGAH PERTUMBUHAN JAMUR Saprolegnia sp. PADA IKAN GURAMI (Osphronemus gouramy) SECARA IN VITRO Horas M. C. Simatupang; Yunasfi Djayus; Dwi Suryanto
AQUACOASTMARINE Vol 6, No 2 (2018): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.525 KB)

Abstract

Kecombrang have chemical content such as saponins, flavonoids, polyphenols, essential oils, and saponins which maypotencial as antimicroba. The purpose of this study was to determine the optimal concentration of kecombrang (Nicolaia speciosa) leaf extract to inhibit the growth of fish pathogenic fungi Saprolegnia sp. in gourami (Osphronemus gouramy). This research was conducted 3 months, from January to April 2017. Methanol, ethyl acetate and n - hexane were used as solvents for kecombrang leaf extraction. Assay on inhibitory of extract of kecombrang to Saprolegnia sp. used extract concentration of 0, 20, 40, and 60. Toxicity test (LC50) was conducted in gouramy at extract concentration of 1000, 100, 10, and 0 ppm. Water quality was observed icluding temperatute, DO, pH. The results showed that kecombrang leaf extract was reddish green, reddish brown, and yellowish green in color. Preliminary test of phytochemical compound of the extract showed that the extract contained saponins, tannins, and terpenes. The inhibitory test showed that ethyl acetate at concentration of 60% was able to inhibit up to 7.7 cm of the fungal growth. LC50 of methanol, ethylacetat, and n - hexane leaf extract was 25.4, 22.7, and 26.2 ppm, respectively. Temperature was 29 - 30 0C, DO was 7.0 - 7.2, and pH was 7.4 - 7.5 at the time of study.Keywords: inhibitory test, kecombrang, leaf extract, gouramy (Osphronemus gouramy), saponin, Saprolegnia sp.
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