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Ekosistem mangrove sebagai habitat kepiting bakau (Scylla Serrata) di Kampung Nipah Desa Sei Nagalawan Kecamatan Perbaungan Serdang Bedagai Provinsi Sumatera Utara

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 7, No 1 (2018): April 2018
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract

Highly Utilization of Mangrove field as cultivation field of fish and recreation and tour site by people have big posses to the abundance of Mangrove crab (Scylla serrata) because of mangrove play role as habitats of mangrove crabs. The research was conducted for two months from December 2016 to January 2017. This study aims to see the structure of mangrove vegetation, the abundance of Mangrove Crab and the influence of mangrove vegetation structure on the abundance of Mangrove Crab in Kampung Nipah. The results of this research are Vegetation structure of Mangrove in the station I and II show high density, whereas density in station III wide apart. The abundance of mangrove crab in the station I and II showed the higher result from station III. The Influence of Vegetation Structure of Mangrove and Abundance of Mangrove Crab can be related by using regression analysis Y = 0.0241x + 113.6. The correlation coefficient (r) that value obtained as 0.79 have a meaning the connection between mangrove density and abundance of mangrove crab are rated in the strong category that has a value 79%. The density of Mangrove to 1000 units will rise up the abundance of mangrove crab to 43.5 an individual. Tingginya pemanfaatan mangrove sebagai lahan budidaya ikan dan sebagai wisata rekreasi oleh masyarakat sangat mempengaruhi kelimpahan Kepiting Bakau (Scylla serrata) karena hutan mangrove merupakan habitat bagi Kepiting Bakau. Penelitian ini dilaksanakan selama dua bulan yaitu bulan Desember 2016 sampai Januari 2017. Penelitian ini bertujuan untuk melihat struktur vegetasi mangrove, kelimpahan Kepiting Bakau dan pengaruh struktur vegetasi mangrove terhadap kelimpahan Kepiting Bakau di Kampung Nipah. Hasil dari penelitian struktur vegetasi mangrove di stasiun I dan II memiliki kerapatan sangat padat, sedangkaan kerapatan di stasiun III jarang. Kelimpahan Kepiting Bakau di Stasiun I dan II lebih tinggi dari kelimpahan di stasiun III. Pengaruh kerapatan mangrove dan kelimpahan Kepiting Bakau diperoleh persamaan regresi yaitu Y = 43,521 +  0,2061x.  Koefisien korelasi (r) yang diperoleh 0,79 yang artinya hubungan kerapatan mangrove dan kelimpahan Kepiting Bakau tergolong kuat yaitu sebesar 79%. Kerapatan mangrove sebanyak 1000 satuan akan meningkatkan kelimpahan Kepiting Bakau sebesar 43,5 individu.

Kondisi habitat dan keragaman nekton di hulu Daerah Aliran Sungai Wampu, Kabupaten Langkat, Provinsi Sumatera Utara

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 6, No 2 (2017): August 2017
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract

The study was conducted to determine the condition of the habitat and the diversity of fish in the watershed of Wampu. The habitat conditions was determined by measuring parameters of temperature, brightness, current velocity, depth, DO, pH, type of substrate, the width and the width of the river. Nekton was sampled using electrofishing units at voltage of 15 volt and 9 amperes. The characteristic of upstream watershed was large stones substrate, gravel, and sand with a fast flow and clear waters. Physical-chemical parameters of waters in the upper watersheds Wampu is still suitable for fish, crabs, and shrimp to live in good condition. A total of 15 species of fishes and one species of freshwater crab and one species of freshwater prawns were recorded during the study. There were two species of mahseer were recorded, namely; Tor soro and T. tambra. The higher diversity index (H ) was recorded in the Bahorok River with a value of 4.5 followed by Berkail River (3.45) and Landak River with a value of 2.46.Penelitian ini dilakukan untuk mengetahui kondisi habitat dan keragaman ikan di DAS Wampu. Pengukuran kondisi habitat dengan mengukur parameter suhu, kecerahan, kecepatan arus, kedalaman, DO, pH, jenis substrat, lebar dan lebar badan sungai. Jenis nekton ditangkap dengan alat backpack electrofishing units dimana arus listrik yang dihasilkan bersumber dari batere 15 volt dan 9 ampere. Kondisi habitat pada bagian hulu DAS  Wampu yaitu bertipe substrat batu besar, kerikil, dan pasir dengan arus yang sedang - besar serta perairan yang jernih. Parameter fisika-kimia perairan di hulu DAS Wampu masih layak dan cocok untuk habitat ikan, kepiting dan udang. Selama penelitian nekton yang terkoleksi sebanyak 15 jenis ikan dan 1 jenis kepiting air tawar serta 1 jenis udang air tawar. Pada survei ini ditemukan dua jenis ikan Tor  yakni  T. soro, dan T. Tambra. Keanekaragaman (H) tertinggi terdapat pada Sungai Bahorok dengan nilai 4,5 diikuti Sungai Berkail dengan nilai 3,45, dan Sungai Landak dengan nilai 2,46. 

Potensi, Tingkat Pemanfaatan dan Keberlanjutan Ikan Tembang (Sardinella spp.) di Perairan Selat Malaka, Kabupaten Serdang Bedagai, Sumatera Utara

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

Tembang fish (Sardinella spp.) is a small pelagic fish, which live inschooling. This fish can be caught using drift gill net gear, purse seine, handlinesand payang. The purpose of this study was to determine the potential ofsustainability with optimum fishing effort, utilization rates and insistence,sustainability and management of fish resources in Malacca Strait. The analysisof secondary data from 2008 to 2012 obtained from the Department of Marineand Fisheries Serdang Bedagai regency, and primary data obtained by performeda questionnaire related to the sustainability of tembang fish.The potential prediction performed with Fox model. The result shown thatMSY was 5.930,582 tons/year and optimum effort was 22.466 trips/year. Averageutilization rate of 44,95%, with an average rate of 77,26% insistence, whileallowable catch 4.744,465 tons/year. The sustainability of tembang fish,dimensional the ecological, technologies and institutions into unsustainablecategory. While economic and social dimensions included the category ofsustainable. The management efforts was by setting fishing season, the selectivityof fishing gear, prohibition of fishing gear and quota restrictions arrest.Keywords: Malacca Strait, Potential, Utilization, Sustainability, Sardinella spp.

STUDI ASPEK REPRODUKSI IKAN BAUNG (Mystus nemurus Cuvier Valenciennes) DI SUNGAI BINGAI KOTA BINJAI PROVINSI SUMATERA UTARA

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.

STUDI ASPEK REPRODUKSI IKAN BAUNG (Mystus nemurus Cuvier Valenciennes) DI SUNGAI BINGAI KOTA BINJAI PROVINSI SUMATERA UTARA

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.

Potensi, Tingkat Pemanfaatan dan Keberlanjutan Ikan Tembang (Sardinella spp.) di Perairan Selat Malaka, Kabupaten Serdang Bedagai, Sumatera Utara

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

Tembang fish (Sardinella spp.) is a small pelagic fish, which live inschooling. This fish can be caught using drift gill net gear, purse seine, handlinesand payang. The purpose of this study was to determine the potential ofsustainability with optimum fishing effort, utilization rates and insistence,sustainability and management of fish resources in Malacca Strait. The analysisof secondary data from 2008 to 2012 obtained from the Department of Marineand Fisheries Serdang Bedagai regency, and primary data obtained by performeda questionnaire related to the sustainability of tembang fish.The potential prediction performed with Fox model. The result shown thatMSY was 5.930,582 tons/year and optimum effort was 22.466 trips/year. Averageutilization rate of 44,95%, with an average rate of 77,26% insistence, whileallowable catch 4.744,465 tons/year. The sustainability of tembang fish,dimensional the ecological, technologies and institutions into unsustainablecategory. While economic and social dimensions included the category ofsustainable. The management efforts was by setting fishing season, the selectivityof fishing gear, prohibition of fishing gear and quota restrictions arrest.Keywords: Malacca Strait, Potential, Utilization, Sustainability, Sardinella spp.

Hubungan panjang berat dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di Desa Pulau Sembilan Kabupaten Langkat Provinsi Sumatera Utara

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 6, No 3 (2017): December 2017
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract

The aims of the research was to examine the lenght weight relationships, growth pattern and condition factor of mudskipper (Family: Gobiidae) at the mangrove ecosystem. The research was conducted for two months from March to April 2016 at the mangrove ecosystem in the Sembilan Island village. The result showed that there are three species of mudskipper found in study area, namely Periophthalmus chrysospilos, Periophthalmus gracilis, and Boleophthalmus boddarti.  The growth pattern of mudskipper with a value b < 3,  indicate a allometrik negative growth pattern and the condition factor was between 1-2.Penelitian ini bertujuan untuk menganalisis hubungan panjang bobot, pola pertumbuhan dan faktor kondisi ikan belodok (Famili: Gobiidae) pada ekosistem mangrove di di desa Pulau Sembilan Langkat. Penelitian dilaksanakan selama dua bulan yaitu Maret sampai April 2016. Penelitian ini menggunakan metode purposive random sampling. Hasil penelitian ditemukan 3 spesies ikan belodok di lokasi penelitian yaitu Periophthalmus chrysospilos, Periophthalmu sgracilis, dan Boleophthalmus boddarti. Pola pertumbuhan ikan belodok dengan nilai b < 3, mengindikasikan pola pertumbuhan allometrik negatif. Faktor kondisi dari Ikan Belodok berkisar 1 – 2.

Aktivitas Antimikroba Biji Teratai (Nymphaea pubescens L.) Terhadap Bakteri Aeromonas hydrophila, Streptococcus agalactiae dan Jamur Saprolegnia sp.

AQUACOASTMARINE Vol 2, No 1 (2014): JURNAL AQUACOASTMARINE VOLUME 2, NO 1, AGUSTUS 2014
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Disease prevention in fish using chemicals or antibiotics leads to microbial resistance. One alternative to control the fish disease is to use plant extract. The aim of this study was to investigate the antimicrobial activity of lotus seeds (Nymphaea pubescens L.) on pathogenic bacteria and fungi in fish. The lotus seed was extracted with several solvent, such as n-hexsane, ethyl-acetate, and methanol. Antimicrobial activity assay was carried out using disc diffusion method. Phytochemical preliminary test was done to determine seed chemical compounds. The brine shrimp lethality test was utilised to determine the extract toxicity. The result showed that all extracts inhibited Aeromonas hydrophila, Streptococcus agalactiae, and Saprolegnia sp. growth to some extent. The extract was to inhibit more to S. agalactiae with inhibition zone of 10.72 mm. In general extract of n-heksana was to inhibit more to the test microbes. Cytotoxic activity (LC50) was <1000 μg/ml. Preliminary test of phytochemical compound showed that extracts of lotus seed contains alkaloid, fenolic, glicoside, saponin and steroid/terpenoid.Keywords: Antimicrobial activity, microbial pathogenic, Nymphaea pubescens L.

Bivalvia di Perairan Pantai Cermin, Kabupaten Serdang Bedagai

AQUACOASTMARINE Vol 2, No 1 (2014): JURNAL AQUACOASTMARINE VOLUME 2, NO 1, AGUSTUS 2014
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

The Cermin Beach has a higher natural value such as biodiversity, one of them is bivalve. The objective this research is to study the community structure of bivalve and waters condition in Pantai Cermin of Serdang Bedagai Regency. This research was conducted since June - August 2013 using transec method at 3 station and 4 time interval of sampling. The observed physical and chemical parameter are temperature, salinity, pH, DO, TSS, and type of basic substrate.Bivalve are found in Cermin Beach of Serdang Bedagai Regency consists 15 species, i.e. The species with most value on each station is Donax cuneatus with the abudance in station I that is 150 ind/m2, the abudance in station II that is 331 ind/m2 and abudance in station III is 247 ind/m2. The species diversity index of bivalve range from 0,85 – 1,22, uniformity index of bivalve range from 0,18 – 0,30, domination index of bivalve range from 0,35 – 0,57 and pollution index range from 1,23 – 1,61 is lightly polluted.Keywords: Bivalvia,Cermin Beach, Community Structure

PETA SEBARAN SALINITAS PADA SUMUR BOR DI KELURAHAN BELAWAN II KECAMATAN MEDAN BELAWAN

AQUACOASTMARINE Vol 2, No 1 (2014): JURNAL AQUACOASTMARINE VOLUME 2, NO 1, AGUSTUS 2014
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

People activity in sub district Medan Belawan II require very large. The purpose of this research was to analyze of salinity values and the type of water well drilling in the area of research, analyze the effect of depth of the well to salinity value, analyze salinity distribution map and figuring out how to manage water resources in Belawan II village. This research was conducted on june-july 2013 in village Belawan II, Subdistrict Medan Belawan, Medan. This research used ArcGIS 10 to got a map of the distribution of salinity. The result showed that number of wellbore included in good classification (333mg/l) was 4%, permitted (666-1333 mg/l) was 27%, doubting (1666-2000 mg/l) was 46% and dangerous (2333-3000 mg/l) was 24%. Freshwater was 4%, between fresh water and brackish water was 27% and brackish water was 69%. at a depth of 65-100m, were included in dangerous category was 24%, suspect 18%, allowed 1% and good category not found. At a depth > 100 meters the waters were included in the hazardous category not found, suspect 9%, allowed 44%, and good category was 4%. The most dominating salinity distribution was 1666 mg/l-2000 mg/l were included in suspect category. The most dominating salinity distribution was 1666 mg/l-2000 mg/l were included in suspect category. This result showed that intrusion has occurred in the wellbore, and the water quality wasn’t good to serve as drinking water.Keyword : Intrusion, Salinity, Wellbore