Irma Dewiyanti
Jurusan Ilmu Kelautan Koordinatorat Kelautan dan Perikanan, Universitas Syiah Kuala, Banda Aceh, Indonesia 23111

Published : 51 Documents
Articles

Keragaman jenis dan persen penutupan tumbuhan air di ekosistem Danau Laut Tawar, Takengon, Provinsi Aceh

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 1, No 2 (2012): August 2012
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract. Primary production in freshwater can be observed with the existing of aquatic plants includes micro and macrophyte. The study of aquatic plant is necessary due to the plant has important in aquatic environments, such as providing habitat, spawning ground, feeding ground, and nursery ground for aquatic biota. This study was conducted in June 2012, and the purposes were to identify species of aquatic plants and their percent cover in Lake Laut Tawar, Takengon. Sampling were conducted using quadrate transects of 0.5 x 0.5 m2, and the every transect was divided into 25 sampling points. A total of 10 species of aquatic plants were found and there were divided into four groups based on their morpho-ecology i.e. emergent, free floating, free submerged and rooted with floating leaves. Of these, emergent group was the most predominant (six species), followed by free floating (two species), free submerged (one species), and rooted with floating leave (one species). Hydrilla verticillata (free submerged group) and Eichhornia crassipes (free floating group) had the highest percent covers and density.

Hubungan panjang berat dan faktor kondisi tiga jenis ikan yang tertangkap di perairan Kuala Gigieng, Aceh Besar, Provinsi Aceh

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 1, No 1 (2012): April 2012
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract. The study of the lenght weight relationships and condition factors of the brackiswater fishes found in Kuala Gigeng was conducted. The objective of the present study was to evaluate the growth pattens and condition factor of the belanak (Mugil cephalus), seriding (Ambassis koopsii) and petek (Leiognathus fasciatus). The sampling was conducted for eight time on July 2011 by using gillnet and castnet. The results showed that the belanak (M. cephalus) and seriding (A. koopsii) have allometric negative growth patten, while the petek (L. fasciatus) has an allometric positive. In addition, the relative weight condition factors was higher than 100. And the Fultons condition factor were not different significantly among fishes. Indicating the condition of the Kuala Gigeng is relatively in good condition and support fish growth as well.Keywords. Allometric, Fultons condition factor, fish relative weight, morphology

Keragaman fitoplankton di perairan estuaria Kuala Gigieng Kabupaten Aceh Besar, Provinsi Aceh

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 2, No 1 (2013): April 2013
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract. The objective of the present study was to evaluate diversity of phytoplankton as bioindicator water quality viewed from abundance, diversity index, evenness index, and saphrobic coefficient in Kuala Gigieng, Aceh Besar District, Aceh Province. Sampling was conducted on December 2011 to January 2012. This study applied purposive sampling method. The research obtained 4 families consisted of Crysopyceae (42 genera), Chlorophyceae (8 genera), Cyanophyceae (14 genera) and Euglenophyceae (4 genera). The highest abundance of phytoplankton was 1,362.89 ind/l at high tide on station 3 and the lowest was at low tide on station 1 (809,835 ind/l). The diversity index (H’) was ranged from 3.14 to 4.75, the evenness index (E) was ranged from 0.49 to 0.74, and saprobic coefficient was ranged from 0.331to 0.887. Based on saprobic coefficient, pollution level and water quality was categorized light to moderate level. Furthermore, phase of saprobic were     β-mesosaprobik, β-meso/Oligosaprobik dan β/α-mesosaprobik.Key words : phytoplankton, abundance, diversity index, saprobic coefficient.

Identifikasi dan Kelimpahan Hama Penyebab Ketidakberhasilan Rehabilitasi Ekosistem Mangrove (Identification and Abundance of Pest Causing Unsuccessful Mangrove Rehabilitation)

ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 18, No 3 (2013): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Abstract

Peristiwa tsunami pada tahun 2004 mengakibatkan hampir seluruh kawasan mangrove di sepanjang provinsi Aceh rusak. Penghijauan kembali hutan mangrove yang rusak memerlukan upaya rehabilitasi. Salah satu penyebab ketidakberhasilan rehabilitasi adalah adanya jenis hama yang merusak tanaman mangrove tersebut.  Tujuan penelitian ini adalah untuk mengidentifikasi jenis hama dan kelimpahannya, serta membandingkan kelimpahan hama antara petak contoh yang berbeda ketinggian pasang-surutnya. Pengambilan data semai dan hama menggunakan transek kuadrat 1m x 1m. Terdapat 4 jenis hama yang ditemukan adalah Balanus amphitrite, Sesarma sp., Pteroma plagiophleps, dan Clibanarius sp. Jenis B. amphitrite memiliki kelimpahan tetinggi, dan terdapat perbedaan yang signifikan antara kelimpahan B. amphitrite dalam petak contoh dekat laut dengan dekat darat. Kestabilan komunitas rendah, ditunjukkan oleh rendahnya keanekaragaman, serta tingginya dominansi jenis. Tinggi dan rendahnya kelimpahan hama tidak dipengaruhi oleh kondisi substrat dan fisika-kimia perairan. Hasil penelitian ini menunjukkan bahwa salah satu penyebab ketidakberhasilan rehabilitasi mangrove di Aceh adalah hama yang didominasi oleh B. amphitrite. Kata kunci: identifikasi, hama, semai, rehabilitasi mangrove, Aceh   Due to tsunami event in 2004, wide Aceh areas mangrove forest has been destroyed. Damaging mangrove vegetation will be a problem, especially decreasing the production of organic matter and abration. Rehabilitation is the solution to reforest mangrove area. This program was unsuccessful in some areas because of pest. The purposes of this study were to identify species of pests and their abudance, and to compare the abudance of pest under different inundation regime. Sampling of seedling and pests were studied by using transect quadrate 1m x 1m. In study area was found four kinds of pest, they were Balanus amphitrite, Sesarma sp., Pteroma plagiophleps, and Clibanarius sp. B. amphitrite had the highest abudance, and there was a significantly different the abudance of B. amphitrite between site next to sea and site next to the land. The stability of community was low; it showed by low diversity index, and high dominance. There was a statically correlation between salinity and abudance of pest, so the higher the salinity the higher the pest abudance. The results of this study indicate that one of the causes of the failure of mangrove rehabilitation in Aceh is a pest that is dominated by B. amphitrite. Keywords: identification, pest, seedling, mangrove rehabilitation, Aceh

Hubungan Panjang Berat Dan Faktor Kondisi Lobster (panulirus sp.) Di Perairan Pantai Simeulue

Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 2, No 1 (2017): Februari 2017
Publisher : Universitas Syiah Kuala

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ABSTRACTThe purpose of this research was to know the long weight relation, condition factor and sex-ratio lobster located in the east of Simeulue beach. This research  has been done on February 2016 in floating fish cages, the trade collector located at the bay Sinabang, East Simeulue regency is the owner of the floating fish cages.  The method of this research was a survey method. Lobster sample was taken 30% of the total  lobster captured. It  was carried out as many six times as interval five days. The results of this work were found two type of the lobsters which includes Paniluirus penicillatus and Panulirus versicolor composition with 53 and 47%. Based on counting of a long weight relation of Panulirus penicillatus found an equivalence W= 0,00372L 2,571 and Panulirus versicolor with equivalence W= 0,003276 2,609, the value b indicates  both type of the lobsters has negative allomatrict growth nature. the average body weight relative value  (Wr) and condition factor  (K) both type of those lobsters, Panulirus penicillatus value Wr= 100,76 ±12,58 and value K= 2,25 ±0,35, whereas, the Panulirus versicolor value Wr= 101,59 ±16,41 and K= 2,15 ±0,42.  Body weight relative of both type of those lobsters  over 100 grams indicates that the east Simeulue beach still support for the lobster growth. Condition factor value shows both type of those lobster has the same scale. Based on the survey was found  that sex-ratio of Panulirus penicillatus 1:1,04 and Panulirus versicolor 1,17:1. This case showed that the sex-ratio of both these lobsters still in the same ratio.Key words: Weight long relation, Condition Factor , Sex-ratio, Lobster, Simeulue. ABSTRAKPenelitian ini bertujuan untuk mengetahui hubungan panjang berat, faktor kondisi dan sex-ratio lobster di perairan pantai Simeulue. Penelitian ini dilakukan pada bulan Februari 2016 di Keramba Jaring Apung (KJA) pedagang pengumpul yang ada di Teluk Sinabang Kecamatan Simeulue Timur. Metode yang digunakan dalam penelitian ini adalah metode survei. Sampel lobster yang di ambil adalah 30% dari total lobster yang tertangkap dari berbagai lokasi penangkapan di perairan pantai Simeulue dan pengambilan sampel dilakukan sebanyak 6 kali dengan selang waktu 5 hari. Hasil penelitian ditemukan 2 jenis lobster yaitu: Panulirus penicillatus dan Panulirus versicolor dengan persentase 53 dan 47%. Berdasarkan perhitungan hubungan panjang-berat Panulirus penicillatus didapatkan persamaan W= 0,00372L2,571 dan Panulirus versicolor dengan persamaan W= 0,003276L2,609, nilai b yang didapatkan menunjukkan kedua jenis lobster tersebut mempunyai sifat pertumbuhan allometrik negative. Nilai rata-rata berat relatif (Wr) dan faktor kondisi (K) kedua jenis lobster tersebut, yaitu Panulirus penicillatus nilai  Wr= 100,76 gr  ±12,58 dan nilai K= 2,25 ±0,36 sedangkan Panulirus versicolor nilai Wr= 101,59 gr ±16,41 dan K= 2,15 ±0,42. Berat relatif dari kedua jenis lobster tersebut diatas 100 gr menunjukkan bahwa perairan pantai Simeulue masih mendukung untuk pertumbuhan lobster dan nilai faktor kondisi menunjukkan kedua jenis lobster tersebut  mempunyai kemontokan yang sama. Sex-ratio Panulirus penicillatus adalah 1:1,04 dan Panulirus versicolor adalah 1,17:1. Hal ini menunjukkan sex-ratio kedua jenis lobster tersebut masih dalam kondisi seimbang.

Seleksi Bakteri Berpotensi Probiotik dari Ikan Mas (Cyprinus Carpio) Indegenous Jantho Berdasarkan Aktivitas Antibakteri secara In Vitro

Jurnal Teknologi dan Industri Pertanian Indonesia Vol 6, No 2 (2014): Vol.(6) No.2, June 2014
Publisher : Agricultural Faculty

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Abstract

One of the alternatives to antimicrobials in disease control is probiotic bacteria as microbial control agents. This research was carried out to obtain indegenous isolates of probiotic bacteria from digestive tract Cyprinus carpio. Selection criteria were appointed based on the capacity to produce the antibacterial compound against the pathogen and grow at pH 2. The research was conducted from May to July 2014 at Microbiology Laboratory, Biology Department, UNSYIAH. The research was carried out by experiment laboratories. The planting of the bacteria was carried out with the pour-plate method in nutrient agar medium. The result show that there are six bacterial isolates varied morphological colony and cell and able to produce antibacterial compounds for active against A.hydrophila and E. tarda.

KERAGAAN NITROGEN DAN T-PHOSFAT PADA PEMANFAATAN LIMBAH BUDIDAYA IKAN LELE (Clarias gariepinus) OLEH IKAN PERES (Osteochilus kappeni) DENGAN SISTEM RESIRKULASI

Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 1, No 2 (2016): Agustus 2016
Publisher : Universitas Syiah Kuala

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Abstract

The purpose of this study was to analyzed the role of peres fish and kale plants as a commodity enhancements to reduce levels of nitrogen and T-Phosfat from waste catfish, also to analyze the survival and biomass peres fish, catfish and kale plants. This research was conducted at Unit Pelayanan Teknis Balai Benih Ikan (UPT-BBI) Lukup Badak, Kabupaten Aceh Tengah Provinsi Aceh in October to November 2015. The method of this study was an experimental method with a completely randomized design (CRD), with use 4 levels treatments and 3 repetitions, this study also uses regression and correlation analysis. The results showed that the kale plants and peres fish did not leave a role of influence to lower the value of Nitrogen and T-Phosfat from waste catfish, but it affects both the survival and growth (length and weight), both in peres fish, kale plants, as well as catfish. Water quality parameters in this study to the range of tolerance for fish farming Peres and catfish.Penelitian ini bertujuan untuk menganalisis peranan ikan peres dan tanaman kangkung sebagai komoditas tambahan terhadap kadar Nitrogen dan T-Phosfat yang berasal dari limbah budidaya ikan lele, terkait dengan kelangsungan hidup dan biomassa ikan peres, ikan lele dan tanaman kangkung. Penelitian ini dilakukan pada bulan Oktober hingga bulan November tahun 2015 di Unit Pelayanan Teknis Balai Benih Ikan (UPT-BBI) Lukup Badak, Kabupaten Aceh Tengah Provinsi Aceh. Metode yang digunakan dalam penelitian ini adalah metode eksperimen dengan rancangan acak lengkap (RAL), dengan menggunakan 4 taraf perlakuan dan 3 kali ulangan. Hasil penelitian menunjukkan parameter kualitas air pada penelitian ini tergolong dalam kisaran toleransi untuk budidaya ikan peres dan ikan lele. Penambahan tanaman kangkung dan ikan peres tidak berpengaruh untuk menurunkan nilai Nitrogen dan T-Phosfat, namun berpengaruh baik terhadap kelangsungan hidup dan pertumbuhan (panjang dan berat) pada ikan peres, lele dan tanaman kangkung.

Pertumbuhan dan Kelangsungan Hidup Benih Ikan Peres (Osteochilus vittatus) Pada Beberapa Konsentrasi Vitamin C L-Ascorbyl-2-Phosphate-Magnesium (L-Ap-Mg)

Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 2, No 2 (2017): April 2017
Publisher : Universitas Syiah Kuala

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Abstract

This research aim was to determine the optimum dose of vitamin C L-Ascorbyl-2-Phosphate Magnesium in the feed of peres fish (Osteochilus vittatus). The completely randomized design (CRD) with 7 treatments and three replicates were used in this study. The tested treatment is the differences dosage of vitamin C L-Ascorbyl-2-Phosphate-Magnesium (L-AP-Mg) supplemented in experimented diet containing 30% protein, the tested dosages of vitamin C were 0 (control), 50, 100, 150, 200 250, 300 mg/kg of feed. The fish were fed three times a day on 08:00, 12:00, and 17:00 pm for 60 days. The result showed the weight gain ranged between 0.28 g - 0.57 g, the specific growth rate ranged from 1.12% - 2.19% per day, daily growth rate ranged from 0.31 g / day –to 1.15 g / day,  and the survival rate ranged from 76% - 97.33%. The highest values for all parameters were found at the dosage of 300 mg / kg of feed.  The ANOVA test showed that the differences of vitamin C gave a significant effect on weight gain, specific growth rate, daily growth rate, feed conversion ratio, feed efficiency, and survival rate of the peres fish (P<0.05). Based on the Duncan test showed that the highest weight gain, specific growth rate, daily growth rate, feed efficiency, feed conversion ratio and survival rate were found at the dosage of 300 mg / kg feed. In general, the growth of peres fish seed (O. vittatus) which were given vitamin C in their feed was higher than those that were not contained vitamin C. Penelitian ini bertujuan untuk menentukan dosis optimum vitamin C L-Ascorbyl-2-Phosphate Magnesium dalam pakan untuk benih ikan peres (Osteochilus vittatus). Metode yang digunakan pada penelitian ini adalah eksperimental dengan model Rancangan Acak Lengkap (RAL) non faktorial, dengan 7 taraf perlakuan dan masing-masing 3 kali ulangan. Faktor yang di uji adalah perbedaan dosis vitamin C jenis L-Ascorbyl-2-Phosphate-Magnesium (L-AP-Mg) dalam pakan ekperimen yang mengandung 30% protein.  Perlakuan yang diuji adalah perlakuan dosis vitamin C 0, 50, 100, 150, 200 250, 300 mg/kg pakan. Pakan diberikan 3 kali sehari (08.00, 12.00, dan 17.00 WIB) selama 60 hari. Hasil penelitian menunjukkan bahwa pertambahan bobot berkisar antara 0,28 g – 0,57 g, laju pertumbuhan spesifik berkisar 1,12 % perhari – 2,19 % perhari, laju pertumbuhan harian berkisar 0,31 g/hari – 1,15 g/hari, dan tingkat kelangsungan hidup berkisar 76% - 97,33%. Nilai tertinggi untuk semua parameter yang di ukur dijumpai pada perlakuan 300 mg/kg pakan. Hasil uji ANOVA menunjukkan bahwa pemberian dosis vitamin C yang berbeda dalam pakan berpengaruh nyata terhadap pertambahan bobot, laju pertambahan spesifik, laju pertumbuhan harian, dan kelangsungan hidup  benih ikan peres (P<0,05). Berdasarkan hasil uji lanjut Duncan menunjukkan pertambahan bobot, laju pertambahan spesifik, laju pertumbuhan harian tertinggi dijumpai pada perlakuan dosis vitamin C 300 mg/kg pakan. Berdasarkan hasil penelitian yang telah dilakukan, pemberian dosis vitamin C dalam pakan memberikan hasil lebih baik berbanding tanpa vitamin C. Dosis vitamin C terbaik adalah 300 mg/kg pakan.

Kepadatan Teritip (Balanus Sp.) di Kawasan Rehabilitasi Mangrove Pemukiman Rigaih Kecamatan Setia Bakti Kabupaten Aceh Jaya, Provinsi Aceh

Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 2, No 4 (2017): November 2017
Publisher : Universitas Syiah Kuala

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This research was conducted on June 2016 and aim to find out the density of barnacles (Balanus sp.) in Mangrove Rehabilitation Area at Rigaih Settlement of Setia Bakti Sub-district, Aceh Jaya Regency. The method used was purposive sampling, where there were 5 research stations and in each station was done 3 times repetition with a distance of 20 meters. In addition, every station was placed based on the differences in mangrove density characteristics. The calculation of barnacles (Balanus sp.) was conducted when the water was receding by making plots with the method of squared transect plot which placed systematically. For ≥ 10cm diameter of trees category, it was needed 10m x 10m replications (plot) and for the seedling category with diameter 2cm - 10cm, the plots were made smaller with 5m x 5m. While the plot of 1m x 1m was placed in a swath with the size 5m x 5m to calculate the density of barnacles (Balanus sp.). The results of this research showed that the density of barnacles (Balanus sp.) ranged from 19.00 ind/m2 to 42.67 ind/m2. Furthermore, the mangrove density ranged from 0.18 to 0.56 ind/m2 in tree category and in the seedling category ranged from 0.6 to 0.76 ind/m2.       Penelitian ini telah dilakukan untuk mengetahui kepadatan teritip (balanus sp.) di Kawasan Rehabilitasi Mangrove Pemukiman Rigaih Kecamatan Setia Bakti  Kabupaten Aceh Jaya. Adapun penelitian ini dilakukan pada bulan juni 2016, metode yang digunakan adalah purposive sampling, dimana stasiun penelitian berjumlah 5 stasiun dan pada masing-masing stasiun dilakukan 3 kali pengulangan dengan jarak ulangan 20 meter. Pemilihan stasiun ini berdasarkan perbedaan karakteristik kerapatan mangrove. Selanjutnya penghitungan teritip (Balanus sp.) dilakukan saat air menjelang surut dengan membuat petak contoh (plot) metode plot transek kuadrat yang diletakkan secara sistematik. Pada setiap ulangan diletakkan plot10 m x 10 m untuk pohon berdiameter ≥ 10 cm kemudian pada plot tersebut petak yang lebih kecil dengan ukuran 5 m x 5 muntuk kategori anakan yang berdiameter 2 cm – 10 cm, selanjutnya diletakkanplot yang berukuran 1 m x 1 myang ditempatkan dalam petak ukuran 5 m x 5 m untuk menghitung kepadatan teritip (Balanus sp.). Hasil penelitian menunjukkan bahwa di kawasan rehabilitasi mangrove pemukiman Rigaih Kecamatan Setia Bakti  Kabupaten Aceh Jaya ditemukan kepadatan teritip (Balanus sp.) berkisar antara 19,00 ind/m2 sampai 42,67 ind/m2. Kerapatan mangrove berkisar antara 0,18ind/m2 sampai 0,56 ind/m2 pada kategori pohon dan pada kategori anakan berkisar antara  0,6 ind/m2 sampai 0,76 ind/m2. Oleh karena itu, semakin tinggi kerapatan mangrove maka semakin tinggi pula nilai kepadatan teritip.

Kondisi terumbu karang dan makro invertebrata di Perairan Ujong Pancu, Kecamatan Peukan Bada, Aceh Besar

DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Vol 4, No 1 (2015): APRIL 2015
Publisher : Faculty of Marine and Fisheries, Syiah Kuala University

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Abstract. The aimof this study was to evaluate the condition of coral reefs and macro invertebrates at Ujong Pancu, Aceh Besar District The study was carried out from April to May 152012. Coral coverage was observed by using Point Intercept Trancect method and Visual census technique for macro invertebrates. There was 50% of hard coral coverage recorded in three observation locations. The predominant genus was Acropora with a percentage of  more than 50% at all locations. The abundance of macro invertebrateswas ranged from 3.75 to 7.75 ind/transect. The most abundant macro invertebrates was Diadema setosum with percentage of more than 40% at each location. The diversity index (H’) of coral reefs and macro invertebrates were ranged from 0.74 - 1.36 and 0.98 – 1.5, respectively. In general, the condition of coral reefs and macro invertebrates in Ujong Pancu was in good condition. Keywords: Coral reefs; Macro invertebrates; Ujong Pancu. Abstrak. Penelitian ini bertujuan untuk mengetahui kondisi terumbu karang dan makro invertebrata di Ujong Pancu. Penelitian ini dilakukan pada bulan April hingga Mei 2012. Tutupan karang diamati dengan menggunakan Metode Point Intercept Transect (PIT) dan makro invertebrata diamati dengan menggunakan metode TeknikVisual Sensus. Hasil penelitian ditemukan bahwa lebih dari 50% tutupan karang keras pada ketiga stasiun pengamatan. Genus yang paling mendominasi pada ketiga stasiun adalah Acropora dengan persentase lebih dari 20% pada setiap stasiun pengamatan. Kelimpahan makro avertebrata berkisar antara 3,75 hingga 7,75 ind/transek. Kelimpahan makro invertebrata terbesar adalah Diadema setosum dengan persentase lebih dari 40% pada setiap stasiun pengamatan. Indeks keanekaragaman (H’) karang dan makro investebrata berkisar antara  0,74 - 1.36 dan 0,98 – 1,5 secara berurutan. Secara umum berdasarkan indeks yang digunakan, kondisi terumbu karang dan makro invertebrata di Ujong Pancu tergolong baik.Kata kunci : Terumbu Karang; Makro avertebrata; Ujong Pancu.