Yunasfi Djayus
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Journal : Gizi, Kesehatan Reproduksi dan Epidemiologi

STUDI ASPEK REPRODUKSI IKAN BAUNG (Mystus nemurus Cuvier Valenciennes) DI SUNGAI BINGAI KOTA BINJAI PROVINSI SUMATERA UTARA Manurung, Vindy Rilani; Djayus, Yunasfi; Desrita, Desrita
AQUACOASTMARINE Vol 1, No 1 (2013): JURNAL AQUACOASTMARINE VOLUME 1, NO 1, DESEMBER 2013
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Baung fish (Mystus nemurus CV) is a fish of high economic value. Thepurpose of research to reproductive aspects (sex ratio, gonad maturity level (TKG),gonad maturity index (IKG), first time size mature gonad, fecundity and eggdiameter). The study was conducted from March to May 2013 at three locations . Themethod used descriptive analytic .Sex ratio of Baung fish with unbalanced sex ratio with a value of 4.5>3.8.Gonad maturity level (TKG) found I- IV, while the male fish only I- III. gonadmaturity index (IKG) female fish 0.01-7.33% and 0.01-0.26% for male fish . The firstgonad size mature female fish is 268 mm . Fecundity of Baung fish is 18229-44 392eggs . Distribution diameter on the distribution of fish eggs female 0.38 to 2.05 mm.Keyword : Baung fish, Bingai river, Fish reproduction, Mystus nemurus CV.
Struktur Komunitas Ikan di Sungai Naborsahan Danau Toba Sumatera Utara Tarigan, Putri Ananda; Djayus, Yunasfi; Suryanti, Ani
AQUACOASTMARINE Vol 1, No 1 (2013): JURNAL AQUACOASTMARINE VOLUME 1, NO 1, DESEMBER 2013
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

This research was conducted in Naborsahan River, North Sumatera in April-June 2013. It was aimed to know water quality in Naborsahan River, fish community structure and the relationship between community structure and physical and chemical factors of water. A survey method was conducted using Purpose Random Sampling in 4 stations. The obtained data were principal component Analysis (PCA) and analyzed descriptively.This research obtained 8 families, 9 genus, 10 species and 10745 individual fish. Highest relative abundance was fish species Bilih of 98.83%, while the lowest was goldfish and Sword Platy fish is 0.016%. Diversity index, fish uniformity index obtained,dominance index and index of similarity ranged from 0.08–0.73, 0.04-0.53, 0.59 - 0.98 and 50% - 89%, respectively. Temperature, current velocity, depth, brightness, pH, dissolved oxygen, biochemical oxygen demand, phosphate, nitrite, nitrate and turbidity varied between 22-25oC, 0.24-0.44 m/s, 0.62-0.79, 0.45-0.76, 6.75-7.9, 7.1-10.9 mg/l, 2.22-8.06 mg/l, 0.003-0.005 mg/l, 0.424-0.584 mg/l, 0.039-0.059 mg/l and 4.207-16.617 NTU, respectively. The results of PCA showed that temperature, depth, brightness, pH, DO and BOD5 are highly correlated with community structure. While flow, turbidity, nitrate, nitrite and phosphate are the lowest correlating factor of community structure.Keywords: Diversity, Fish, Water Quality, Naborsahan.
Kondisi Kualitas Air Danau Toba di Kecamatan Haranggaol Horison Kabupaten Simalungun Sumatera Utara Haro, Debi Debora; Djayus, Yunasfi; Harahap, Zulham Apandy
AQUACOASTMARINE Vol 1, No 1 (2013): JURNAL AQUACOASTMARINE VOLUME 1, NO 1, DESEMBER 2013
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Aquaculture of floating net cages system at Lake Toba in particularHaranggaol developed rapidly, As uncontrolled development unit ofculture can cause water quality decreased in Haranggaol, Toba Lake sothat it can pass through water quality standard. This research aim to knowthe level of water pollution in Lake Toba Haranggaol using the STORETand Index Pollution Method then compare it without floating net cages.This research was done in May- July 2013. Sampling method used methodof purposive random sampling. Station was used for research was Station 1at environment of floating net cages and Station 2 at without floating netcages area. Result shown water temperature: 26-28 0C, brightness: 2,8-5,35meter, turbidity: 0,16-7.13 NTU, TSS: 12.36-19.36 mg/l, pH: 7,1-8,3, DO:4,3–6,3 mg/l, BOD: 0,4-1,7 mg/l, COD: 4,42-6,63 mg/l, NH3: 0,115-0,293mg/l, NO3: 0,306-0,814 mg/l, NO2: 0,001-0,015 mg/l, PO4: 0,038-0,188mg/land Colifecal: 8,6–22,2 MPN/100 ml. Based on the results of research therewere some parameters that have passed water quality standard atenvironment of floating net cages was 0,217 mg/l of NH3, 0,578 mg/l of NO3and 0,134 mg/l of PO4, while at without floating net cages area was 0,144mg/l of NH3, 0,401 mg/l of NO3 and 0,056 mg/l of PO4. Based on Storetmethod, both research station categorized into the class C that was middlepolluted. While according to Pollution Index method both research stationcategorized light polluted to middle polluted.`Key words: Colifecal, Floating Net Cages, Water Quality
DAMPAK PENGERUKAN PASIR TERHADAP KELIMPAHAN PLANKTON DAN KUALITAS AIR DI HULU DAERAH ALIRAN SUNGAI BELAWAN, KECAMATAN PANCUR BATU, KABUPATEN DELI SERDANG Sagala, Christina; Nasution, Zulkifli; Djayus, Yunasfi
AQUACOASTMARINE Vol 1, No 1 (2013): JURNAL AQUACOASTMARINE VOLUME 1, NO 1, DESEMBER 2013
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Watershed is the area bounded ridge where the rain water that falls on the area will be accommodated by the ridge and will be streamed through small streams to the main river. The presence of sand dredging activities in upstream watersheds Belawan can be lower water quality and abundance of micro-organisms, including plankton. This research had been conducted from April to July 2013 in Belawan Watershed Headwaters. This research used Purpossive Random Sampling methods. There were 2 stations, Station 1: Pertampilen village, District Pancur Batu as an active area of sand dredging activities, Station 2: Salam Tani village, District Pancur Batu as areas which were far away from the sand dredging activities. Sampling activities were conducted 4 times once/month. The research aimed to knew water quality and determined the abundance of plankton in Belawan Watershed Headwaters.The results showed that at the station I, there were found 19 genera of phytoplankton and 1 genera of zooplankton and at the station II, there were only found 17 genera of phytoplankton. Plankton abundance at the station I was 85, 404 ind/l and at station II was 128,684 ind/l. Water quality at the station I had passed the thresholds as water quality raw materials, such as ammonia and nitrite. Turbidity also have very high at station I. This research showed that the sand dredging activity affected the abudance of plankton in the river.Keywords: Water Quality, Sand Dredging, Plankton, River
Co-Authors Ahmad Muhtadi Ahmad Muhtadi Rangkuti Ahmad Rizki, Ahmad Albino Panjaitan, Albino Ani Suryanti Atikah Asry Aznia Marlina Sima Christina Sagala Danra Siallagan Debi Debora Haro Dedi Pradana Desita Sari Br Ginting Desrita Desrita Desy Ariska, Desy Dewi, Rita Rosmala Dinarta Hutabarat, Dinarta Dwi Suryanto Endaiyana Libertyta Ester Nelya Tindaon Fadhilah, Amanatul Fahmi Fadhli Rais, Fahmi Fadhli Febrina Arli, Febrina Green Alfath Siregar Hafiz Muhammad Henny Christien Huria Marnis Indra Lesmana Josephin Saut Sintong Panjaitan, Josephin Saut Sintong Lubis, Risda Farida M.Bobbie Jhora Waker, M.Bobbie Jhora Manik, Maryenta MARAGUNUNG DALIMUNTHE Meia Ester Sela Ginting, Meia Ester Sela Muhammad Ma’rufi, Muhammad Muhammad Riza Kurnia Lubis, Muhammad Riza Kurnia muhammad rizky, muhammad Munthe, Keumala Hafni Nanda Mutia Hardianti Nurmatias Nurmatias Nurul Azmi, Nurul Ofi Sabrina Sitompul Pesta Saulina Sitohang Prasetia Ajitama Putri Ananda Tarigan Putri, Dizza Ayu Rahmad Ritonga Raissha Amanda Siregar Ramadhani, Dinda Ayu Rangga Warsito, Rangga Rebeka Paimaibot S, Rebeka Paimaibot Reza Alnanda Rika Wirani Riri Ezraneti Romi Pindonta Tarigan Rusdi Leidonald Sabilah Fi Ramadhani Sarah Diba Sandy, Sarah Diba Shavira, Elza Siagian, Suci Pratiwi Fahrina Sihombing, Ema Theresia Silalahi, Daniel Abas Herman Simatupang, Horas M. C. Sultan Akbar Habibullah, Sultan Akbar Suria Masriani Sinaga, Suria Masriani Susanti Lawati Barus Syammaun Usman Tajuddin Siregar, Tajuddin Vindy Rilani Manurung Yudha Perdana Putra Lubis ZAINURI SYAM Zefri Ade Gurukinayan, Zefri Ade Zulham Apandy Harahap Zulkifli Nasution