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Acta Aquatica: Aquatic Sciences Journal
Published by Universitas Malikussaleh
ISSN : 24069825     EISSN : 26143178     DOI : -
Core Subject : Science, Education,
Materials Science & Nanotechnology Other
Acta Aquatica: Aquatic Sciences Journal is a scientific open access journal in the field of aquatic sciences, published periodically (April and October) by the Institute of Research and Community Service (LPPM) Universitas Malikussaleh (Malikussaleh University) in cooperation with Marine Center Universitas Malikussaleh, Department of Aquaculture Universitas Malikussaleh and Department of Marine Science Universitas Malikussaleh. Acta aquatica are publish original research, overviews and reviews relating to aquatic environments (wetlands, freshwater and marine waters) and the border limits of these environmental systems and the impacts of human activities on the environmental systems. Acta Aquatica has a related studies in aquatic bioecology, aquaculture, hydrology, biodiversity of aquatic biosphere, oceanology, exploitation and exploration technology of aquatic resources, fisheries product technology, aquatic microbiology, aquatic modeling, aquatic geographic information systems, and socio-economic of aquatic resources.
Arjuna Subject : -
Articles 300 Documents
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Pengaruh ketinggian air dalam pemeliharaan larva ikan hias botia (Chromobotia macracanthus, Bleeker) Maulina Sari; Muhammad Hatta; Asep Permana
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 1: No. 1 (October, 2014)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v1i1.294

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh ketinggian air yang berbeda terhadap pertumbuhan dan kelangsungan hidup larva ikan botia (Chromobotia macracanthus, Bleeker). Hasil penelitian menunjukkan bahwa sintasan atau kelangsungan hidup tertinggi terdapat pada perlakuan B dengan ketinggian air 10 cm yaitu sebesar 98.88%, sedangkan kelangsungan hidup terendah terdapat pada perlakuan A dengan ketinggian air 5 cm yaitu sebesar 97.99%. Pertambahan bobot nilai tertinggi terjadi pada perlakuan A dengan ketinggian air 5 cm dengan nilai bobot rata–rata 0.02252 gr dan pertambahan bobot rata–rata terendah terjadi pada perlakuan C dengan ketinggian air 15 cm yaitu sebesar 0.01132 gr. Pertambahan panjang rata–rata tertinggi terjadi pada perlakuan A yaitu sebesar 0.42 cm dan yang terendah terjadi pada perlakuan B yaitu sebesar 0.29 cm. Parameter kualitas air selama penelitian masih dalam kisaran optimal dimana suhu 24,3–28,9oC, pH 6,5–7,0, DO 6,84–7,69 ppm, NH3 0,00–0,03 ppm, NO2 0,00–0,07 ppm. Analisis statistik dengan uji F diperoleh bahwa ketinggian air yang berbeda dalam pemeliharaan larva ikan botia (C. macracanthus, Bleeker) berbeda sangat nyata (P0.01) terhadap pertambahan bobot dengan nilai Fhitung (21.00) Ftabel (10.92), dan berbeda sangat nyata terhadap pertambahan panjang dengan nilai Fhitung (23.56) Ftabel (10.92), sedangkan untuk sintasan atau kelangsungan hidup tidak berbeda nyata antar perlakuan. Hasil uji BNT menunjukkan, setiap perlakuan memberikan pengaruh terhadap pertumbuhan dan tidak berpengaruh terhadap kelangsungan hidup.The study aims to determine the effect of different water levels on the growth and survival of fish larvae Botia (Chromobotia macracanthus, Bleeker). The results showed that the survival rate was highest in treatment B with the water level was 10 cm which was equal to 98.88 %, whereas the lowest survival rate was found in treatment A with the water level was 5 cm which was equal to 97.99 %. The highest value of weight gain occurred in treatment A with average value in weight was 0.02252 g and the average weight gain was lowest in the treatment of C that reached 0.01132 g. The highest growth of length was occured in treatment A that was equal to 0.42 cm and the lowest occurred in treatment B that was 0.29 cm. Water quality parameters during the study were in the tolerance range where the optimum temperature were 24,3-28,9 oC , pH 6.5 to 7.0, DO 6.84 to 7.69 ppm, NH3 0.00 to 0.03 ppm , NO2 0.00 to 0.07 ppm . Statistical analysis by F test showed that the different water levels in the larval rearing of fish Botia (C. macracanthus, Bleeker) was significantly different ( P 0.01) in the weight gain with the value of Fcount ( 21.00 ) Ftable ( 10.92 ), and it was significantly different against the length with the value of F count ( 23:56 ) F table ( 10.92), while for the survival rate showed has not significantly different between treatments. The LSD test showed that all the treatment were effected the growth rate, but not for survival rate.
First Observation of the Nocturnal Cleaning Relationship between Common Octopus Octopus vulgaris (Cuvier, 1797), and Indo-Pacific Palaemonid Shrimp, Urocaridella pulchella Yokeş & Galil, 2006 from the Iskenderun Bay, Eastern Mediterranean Coast of Turkey Deniz Ergüden; Deniz Ayas; Necdet Uyğur
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 8: No. 2 (August, 2021)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v8i2.4780

Abstract

During a Scuba survey in Iskenderun Bay at night time on November 2018, a female Urocaridella pulchella individual was observed with nocturnal cleaning on Octopus vulgaris at 16 m in depth. Some photos of the shrimp and its symbiont were taken. Although the nocturnal cleaning relationship between U. pulchella and various marine species has been reported in some studies, the nocturnal cleaning relationship between O. vulgaris and U. pulchella has been observed for the first time. In addition, in the present study, we first reported Indo-Pacific palaemonid shrimp U. pulchella which was encountered in its natural habitat during an underwater observation from Iskenderun Bay, and this report is the first observation for this area and fills a gap in the distribution range of this species.Keywords: eastern Mediterranean, Iskenderun coast, nocturnal cleaning, Palaemonidae, Turkey.
Efektivitas serbuk daun mahkota dewa (Phaleria macrocarpa) terhadap bakteri Edwardsiella tarda Nurul Fajri; Eva Ayuzar; Riri Ezraneti
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 3: No. 1 (April, 2016)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v3i1.334

Abstract

Penyakit adalah salah satu penghambat dalam mengembangkan produksi ikan nila. Satu dari bakteri yang berbahaya dalam budidaya ikan nila adalah Edwardsiella tarda. Penelitian ini dilakukan pada januari 2016 di laboratorium hatchery dan teknologi akuakultur, Prodi Budidaya Perairan Fakultas Pertanian Universitas Malikussaleh. Tujuan penelitian ini adalah untuk mengetahui efektivitas serbuk Phaleria macrocarpa untuk mencegah infeksi bakteri Edwardsiella tarda. Penelitian menggunakan metode eksperimental Rancangan Acak Lengkap (RAL) non faktorial dengan 5 perlakuan 3 ulangan. Hasil penelitian menunjukkan bahwa serbuk P. macrocarpa dapat menghambat pertumbuhan Edwardsiella tarda karena mengandung bahan antimikroba dengan diameter zona hambat 9,5 – 14,5 mm.Disease is one of the obstacles in achieving tilapia production targets. One of harmful bacteria types in tilapia fish farming is Edwardsiella tarda. This research was conducted on January 2016 held at the Laboratory of Hatchery and Aquaculture Technology, Aquaculture departement Agriculture Faculty Malikussaleh University. The purpose of this study was to determine the effectivenes Phaleria macrocarpa powder to prevent infection of bacteria Edwardsiella tarda. This research used experimental method, namely a completely randomized design (CRD) non factorial with five treatments within three replications. The results showed that the P. macrocarpa powder could inhibiting the growth of Edwardsiella tarda because it contained antimicrobial compounds with a clear zone formed 9.5-14, 5 mm.
Observasi aktivitas pengeraman telur dan perkembangan larva lobster air tawar (Cherax quadricarinatus) Munawar Khalil; Ita Ramadhani; Eva Ayuzar
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 5: No. 1 (April, 2018)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v5i1.717

Abstract

Tujuan penelitian ini adalah untuk mengetahui tingkah laku induk lobster air tawar pada saat proses perkawinan, pengeraman dan pemeliharaan telur, Penelitian ini juga melakukan observasi terhadap tahapan perkembangan larva yang dilihat melalui mikroskop. Metode yang dilakukan dalam penelitian ini adalah metode eksperimental yaitu untuk melihat tingkah laku induk betina selama proses pengeraman telur dan perkembangan larva pada lobster air tawar. Parameter uji dilakukan selama pemeliharaan induk dan pengeraman telur menetas. Hasil pengamatan menunjukkan bahwa tingkah laku induk selama proses pengeraman telur terlihat mulai dari 15 hari setelah induk melakukan perkawinan. Proses pemijahan akan terjadi pada malam hari atau menjelang pagi hari. Selama proses pengeraman yang terjadi selama lebih kurang 35 hari, telur lobster mengalami beberapa kali pembelahan dan perkembangan telur itu terlihat dengan adanya perubahan warna telur. Pada tahap perkembangan larva, bagian larva yang di amati adalah pada bagian yang di mulai dengan tumbuh atau terjadi penambahan bulu-bulu halus, umbai-umbai (setae), bintik hitam pada cangkang larva, serta bentuk perubahan pada selubung kepala.The purpose of this study was to observe the behavior of freshwater lobster broodstock during the process of mating, incubation and egg nursering. This research also observed the development stages of larvae through microscope. The method used in this research was experimental that was to observed the behavior of freshwater lobster broodstock during the process of egg incubation and larval development. The tested parameters during the lobster broodstock nursering phase and egg nursering until they hatched. The results showed that the behavior of the lobster broodstock during the process of egg nursering seen starting from 15 days after the broodstock mating. Spawning process will occur at night or before the morning. During the incubating process that lasted for approximately 35 days, the lobster eggs experienced several cleavages and the development of the egg was noticeable by the change of egg color. At the developmental stage of the larvae, the larval part observed is on the part that begins with growing or occurring the addition of fine hairs, the tassels (setae), the black spots on the larval shell, and the shape of the change in the head sheath.
Performance analysis of tetraploid striped catfish (Pangasianodon hypophthalmus) resulting from heat shock induction Prama Hartami; Odang Carman; Alimuddin Alimuddin; Muhammad Zairin Jr; Rahman Rahman; Dede Hermawan
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Jurnal Ilmu Perairan, Vol. 8: No. 1 (April 2021)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v8i1.3828

Abstract

Striped catfish tetraploid induction through heat shock that carried out in this study is not intended to produce on growth fries.But to form a broodstock to produce triploid on growth fries through cross breeding without any physical shock induction process.The fries from the heat shock induction in the previous study were screened or selected by observing the maximum number of nucleoli in fin cells.The number of tetraploid individuals used in the performance test was 105 which were placed in three different concrete tanks.The results showed that the growth of tetraploid striped catfish was more significant than diploid with a difference in the daily weight percentage about 0.497% and 0.158% for length but insignificant differences in FCR and SR.In gonadal development based on histological observations, it was shown that each tetraploid and diploid both male and female striped catfish were at the same level of gonadal maturity.Female gonads were at the previtellogenic oocytes and vitellogenic oocytes, but males are dominated at the stage of spermatocytes and spermatozoa.This histology also shows us that the female gonad was still at the development stage, while the male had entered the mature stage and ready to be spawned.
Pengaruh insektisida golongan organofosfat terhadap benih ikan nila gift (Oreochromis niloticus, Bleeker): analisis histologi hati dan insang Jamin Jamin; Erlangga Erlangga
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 3: No. 2 (October, 2016)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v3i2.324

Abstract

Insektisida golongan organofosfat telah digunakan secara ekstensif dalam bidang pertanian untuk mengontrol hama dan meningkatkan hasil produksi pertanian guna memenuhi permintaan bahan pangan yang tinggi akibat pertumbuhan populasi penduduk yang cepat. Akan tetapi walaupun penggunaan pestisida golongan organofosfat secara nyata telah menigkatkan hasil produksi pertanian, penggunaannya yang tidak terkontrol dapat membahayakan berbagai organisme akuatik dan dapat mengakibatkan efek negatif jangka panjang terhadap lingkungan perairan. Penelitian ini bertujuan untuk mengevaluasi pengaruh berbagai konsentrasi golongan organofosfat (0,0002 ml/L, 0,0004 ml/L dan 0,0005 ml/L Parathion 25%) terhadap kelangsungan hidup dan histologi jaringan hati dan insang benih ikan nila GIFT (Oreochromis niloticus, Bleeker). Benih ikan nila yang telah terpapar dengan berbagai konsentrasi pestisida tersebut menunjukkan beberapa gejala klinis diantaranya: kesulitan respirasi, perubahan warna tubuh menjadi lebih hitam, warna mata dan insang terlihat pucat, kehilangan keseimbangan dan berenang tidak beraturan sebelum kematian. Penelitian ini menunjukkan bahwa dengan semakin tinggi konsentrasi pestisida yang diberikan mengakibatkan semakin rendahnya kelangsungan hidup benih ikan nila. Kelangsungan hidup benih ikan nila yang dipapar dengan konsentrasi pestisida tertinggi (0,0005 ml/L) adalah 6,67%. Selama penelitian ini berlangsung, kelangsungan hidup benih ikan nila yang digunakan sebagai kontrol negatif adalah 100%. Pengamatan histologi jaringan hati dan insang memperlihatkan beberapa kerusakan jaringan akibat paparan Parathion, diantaranya: hemoragi, vakuola, degenerasi sel, telangiaktasis, dan hiperplasia dan kongesti jaringan insang. Penelitian membuktikan bahwa pestisida organofosfat khususnya Parathion 25% memiliki efek negatif terhadap kelangsungan hidup dan mengakibatkan perubahan histologi jaringan hati dan insang benih ikan nila GIFT.Insecticides such as organophosphates, have been used extensively in agriculture to control pest and improve crop yield to meet the high demand for food needed by the fast growing population. However, even though the use of organophosphate pesticides has been substantially increased agriculture crops, indiscriminate use of this chemical substance may cause harmful effects on aquatic organisms and may contribute long-term effects in aquatic environment. The purpose of this current study was to evaluate the effects of commercial organophosphate pesticide (Parathion 25%) on the survival and histopathological changes of GIFT (Genetically Improved Farmed Tilapia) Nile tilapia (Oreochromis niloticus, Bleeker) juveniles following exposure to varying concentrations of the toxicant (0.0002 ml/L, 0.0004 ml/L and 0.0005 ml/L, respectively). Following exposure to this pesticide, exposed fish were observed to exhibit some clinical signs including respiratory distress (such as gasping in air), darkened body color, opaque eyes and pale gills. Loss of balance and erratic swimming prior to death were also observed. As the concentration of pesticide increased, the survival rate of exposed fish reduced. This study found that at the highest concentration given (0.0005 ml/L) resulted in 6.67% survival of exposed fish. In the contrary, none of negative control fish were died during the period of this experiment. The histological observation of liver and gill tissues of exposed fish showed a deleterious effect of Parathion ranged from hemorrhage, vacuolization, cell degeneration, telangiectasia, hyperplasia and congestion of gills. This study provides more evidence that organophosphate pesticide, particularly Parathion 25%, has negative side effects on the survival and causes histological changes in liver and gills tissues of GIFT Nile tilapia juveniles.
Studi pembesaran tiram (Crassostrea sp) melalui desain tata letak yang berbeda Zainura Zainura; Rachmawaty Rusydi; Munawar Khalil
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 3: No. 2 (October, 2016)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v3i2.393

Abstract

Tiram (Crassostrea sp) merupakan salah satu bivalvial potensial yang dapat dikembangkan dalam rangka meningkatkan pendapatan ekonomi. Tata desain media budidaya tiram yang baik akan mempengaruhi pertumbuhan dan kelangsungan hidup tiram. Penelitian ini bertujuan untuk melihat tata desain media budidaya tiram yang baik sehingga mempengaruhi pertumbuhan dan kelangsungan hidup tiram. Penelitian ini dilaksanakan di Keramba Jaring Apung Loskala Lhokseumawe dan di Laboratorium Hatchery dan Teknologi Reulet Program Studi Budidaya Perairan Fakultas Pertanian Universitas Malikussaleh dari bulan Juni sampai Agustus 2015. Adapun perlakuannya yaitu metode peletakkan benih tiram secara rak (horizontal), gantung (vertikal) dan didasar perairan dengan substrak batuan. Adapun rancangan yang digunakan pada penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan 3 ulangan dan 3 perlakuan dan dilanjutkan dengan uji Beda Nyata Terkecil (BNT) jika terdapat perbedaan. Parameter yang diamati adalah kelangsungan hidup, pertambahan panjang, lebar, ketebalan cangkang, pertambahan bobot dan kualitas air. Pertambahan bobot, lebar, panjang, dan ketebalan cangkang tertinggi terdapat pada perlakuan B yaitu dengan nilai rata-rata sebesar 42,95 gram, 1,331 mm, 1,487 mm, 1,843 mm dan pertambahan bobot, lebar, panjang, dan ketebalan cangkang terendah terdapat pada perlakuan C yaitu 0,00 gram dan 0,00 mm. Rata-rata kelangsungan hidup yaitu 84% pada perlakuan A dan B, 0% pada perlakuan C. parameter kualitas air berada pada kisaran yang baik untuk pertumbuhan tiram dalam kisaran suhu 27 - 30 oC, pH 6,8 – 7,5 , dan DO 4,8 – 7,4 ppm.Oysters (Crassostrea sp) is one of the bivalves that is potential to be developed for improving the economic income. The good layout design for culturing oyster will affect its growth and survival. This study aimed to evaluate the layout design which was good for oyster cultivation affecting the growth and survival of oyster. This research was conducted at floating cage Loskala,  Lhokseumawe and in Hatchery and Technology Laboratory, Aquaculture Department, Agriculture Faculty Malikussaleh University fwhich was held on June to August 2015. The treatments were to use rack method (horizontal), hanging (vertical) and bottom methods. Completely randomized design (CRD) was used as research design with three replication for three treatments. Then it was continued by LSD (Least Significant Difference) Test,if there was a difference.Parameters measured were survival length, width, thickness of the shell, weight and water quality.The highest weight, width, length, and thickness of shell were obtained in treatment B which were 42,95 gram; 1,331 mm, 1,487 mm, 1,843 mm. other wise, the lowest one were obtained in treatment C which were 0 gram and 0 mm.The survival rate of both treatment A and B was 89%, which treatment C was 0%. water quality parameters were in good range for growth of oysters where as temperature 27-30 ° C, pH 6,8 to 7,5, and DO 4,8 to 7,4 ppm.
Konsentrasi logam berat Pb dan Cu pada sedimen dan kerang darah (Anadara granosa Linn, 1758) di Perairan Pulau Pasaran, Kota Bandar Lampung Siti Rahmah; Henni Wijayanti Maharani; Eko Efendi
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 6: No. 1 (April, 2019)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v6i1.887

Abstract

Abstrak Perairan Pulau Pasaran memiliki sumber daya laut salah satunya adalah kerang darah (Anadara granosa). Limbah yang bersumber dari daratan dan perairan sekitar mengandung logam berat seperti Pb dan Cu yang dapat mempengaruhi organisme. Kerang darah memiliki potensi yang digunakan sebagai bioindikator untuk mewakili logam berat dalam air karena kerang darah memiliki kemampuan untuk mengakumulasi logam berat dalam konsentrasi rendah. Tujuan penelitian ini adalah untuk menganalisis konsentrasi Pb dan Cu pada sedimen dan kerang darah. Metode yang digunakan dalam penelitian ini adalah purposive random sampling untuk menentukan stasiun penelitian dan metode sampling. Konsentrasi logam berat dianalisis menggunakan metode MP-AES. Hasil penelitian menunjukkan bahwa konsentrasi tertinggi pada kerang darah adalah Pb 206,51 mg / kg dan Cu 95,11 mg / kg. Konsentrasi tertinggi pada sedimen adalah Pb 634,49 mg / kg dan Cu 366,85 mg/kg.Kata kunci: kerang darah (Anadara granosa); logam berat; Pb; Cu; sedimenAbstract Pasaran island waters have marine resources such as blood cockle (Anadara granosa). The amount of waste from land and around of waters contain heavy metall such as Pb and Cu than can affect for the organism. Blood cockle has a potential used as bioindicator to represent the heavy metal in water because blood cockle has capabilities to accumulate the small concentration of heavy metal. The aim of this research are to analysis concentration of Pb and Cu in sediment and blood cockle. Method used in this research purposive random sampling to determine research station and sampling method. The concentration of heavy metal analyzed using MP-AES method. The result showed that the highest concentration in blood cockle of Pb is 206,51 mg/kg and Cu is 95,11 mg/kg. The highest concentration in sediment of Pb is 634,49 mg/kg and Cu is 366,85 mg/kg.Keywords: Blood cockle (Anadara granosa); heavy metal; Pb; Cu; sediment
Pengaruh peningkatan suhu dan waktu pemberian pakan terhadap laju pengambilan pakan pada karang lunak Sarcophyton sp. dan Sinularia sp. Agung Mahayoni Aksari; Ni Luh Watiniasih; Widiastuti Widiastuti
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 7: No. 2 (October, 2020)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v7i2.2526

Abstract

AbstrakMeningkatnya suhu rata-rata permukaan laut menyebabkan kerusakan ekosistem terumbu karang, salah satu akibatnya adalah menurunkan laju pengambilan pakan oleh karang lunak. Penelitian ini bertujuan untuk mengetahui perbedaan laju pengambilan pakan pada suhu berbeda antara karang lunak Sarcophyton sp. dan Sinularia sp., mengetahui pengaruh peningkatan suhu, waktu pemberian pakan serta interaksi pengaruh peningkatan suhu dan waktu pemberian pakan terhadap laju pengambilan pakan pada karang lunak Sarcophyton sp. dan Sinularia sp. Sampel karang lunak diperoleh dari hasil budidaya PT. Dinar Darum Lestari di Perairan Teluk Pegametan, Desa Sumberkima, Kabupaten Buleleng. Sampel fragmen karang diaklimatisasi selama 2 minggu sebelum eksperimen dilakukan dan diberi pakan 2 kali seminggu pada suhu 26°C (suhu kontrol). Perlakuan suhu dilakukan dengan menaikkan suhu air di akuarium 1°C setiap jam untuk mencapai suhu 31°C (suhu stres) dan selanjutnya suhu dipertahankan selama 5 hari. Masing-masing akuarium (26°C dan 31°C) diberikan pakan Artemia salina pada hari kedua dan keempat dengan kepadatan 100 ekor per fragmen di pagi hari selama 3 jam.  Sisa pakan diambil dengan pipet tetes lalu dihitung sampai sisa pakan pada gelas ukur tersebut habis. Hasil penelitian menunjukkan bahwa laju pengambilan pakan antara karang lunak Sarcophyton sp. dan Sinularia sp. tidak berbeda signifikan baik pada suhu kontrol maupun suhu stress. Hal ini diduga karena kedua jenis fragmen karang lunak memiliki toleransi suhu yang relatif sama. Peningkatan suhu mempengaruhi laju pengambilan pakan pada kedua jenis karang lunak secara signifikan. Tetapi, waktu pemberian pakan serta interaksi antara suhu dan waktu pemberian pakan tidak memberikan pengaruh yang signifikan terhadap laju pengambilan pakan. Kenaikan suhu diduga mempengaruhi metabolisme pada karang lunak, sehingga menurunkan kemampuan mengambil pakan. Stres yang dialami kedua jenis karang lunak ketika diinkubasi pada 31oC terus terjadi selama karang lunak diinkubasi pada suhu tersebut sehingga tidak mempengaruhi laju pengambilan pakan pada semua waktu pemberian pakan.Kata kunci: karang lunak; Sarcophyton sp.; Sinularia sp.; peningkatan suhu; laju pengambilan pakan; waktu pemberian pakanAbstractIncreased the mean sea surface temperatures cause damage to coral reef ecosystems, one of those mechanisms is reducing the feeding capacity in soft corals. This study aimed to examine the feeding rates of soft corals Sinularia sp. and Sarcophyton sp. at different temperatures to determine the effect of increasing temperature, feeding time and interaction between those factors on feeding rates of soft corals Sarcophyton sp. and Sinularia sp. Samples of Soft corals were obtained from the cultured of PT. Dinar Darum Lestari in Pegametan Bay Waters, Sumberkima village, Buleleng Regency. Before the experiment, coral fragments were acclimatized for 2 weeks and fed twice a week at 26 °C (control temperature). The experiment started by increasing the water temperature in the aquarium at 1°C every hour to reach 31°C (stress temperature). Once the temperature reached, it kept for 5 days. Each aquarium (26 and 31°C) was fed by Artemia salina nauplii on the second and fourth days with density 100 animals/fragments for 3 hours in the morning. The remained prey was taken by Pasteur pipette and counted manually. The results showed that there was no significant difference in feeding rates in Sarcophyton sp. dan Sinularia sp. at both control and stress temperatures. It is argued that both soft corals relatively have the same temperature tolerance. The increased temperature significantly affected the feeding rate in both soft corals. However, feeding time and interaction between temperature and feeding time did not have a significant effect on the feeding rate. It is assumed that the increased temperature reduces the feeding rate in these soft corals. Moreover, these soft corals seem suffering from stress due to incubate in high temperature (31°C) continuously, caused no significant difference in the feeding rates at all feeding times.Keywords: soft coral; Sarcophyton sp.; Sinularia sp.; increased temperature; feeding rate; feeding time
Aktivitas antibakteri dari ekstrak getah mangrove Excoecaria agallocha pada pelarut kloroform terhadap Escherichia coli dan Staphylococcus aureus Dian Puspitasari
Acta Aquatica: Aquatic Sciences Journal Acta Aquatica: Aquatic Sciences Journal, Vol. 4: No. 1 (April, 2017)
Publisher : Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/aa.v4i1.315

Abstract

Ekstrak mangrove dari jenis Excoecaria agallocha telah diketahui memiliki berbagai manfaat, seperti yang berasal dari daun, akar, kulit batang dan tidak terkecuali pada getah. Getah ini telah dimanfaatkan untuk meracuni ikan, dan dapat membutakan mata apabila getah masuk kedalam mata walaupun sifatnya sementara. Penelitian ini dilakukan untuk menganalisa adanya aktivitas antibakteri ekstrak getah mangrove E. agallocha menggunakan pelarut kloroform terhadap bakteri Escherichia coli dan Staphylococcus aureus. Tahapan dalam penelitian ini meliputi ekstraksi dan uji aktivitas antibakteri. Penelitian ini menggunakan lima perlakuan meliputi kontrol dan ekstrak kloroform dengan konsentrasi 1 µg/disk, 5 µg/disk, 10 µg/disk dan 50 µg/disk. Hasil penelitian menunjukkan bahwa ekstrak getah mangrove E. agallocha menggunakan pelarut kloroform dapat menghambat pertumbuhan bakteri E. coli dan S. aureus dengan diameter zona hambat yang dihasilkan sebesar                  (9,67 ± 0,32) mm terhadap E. coli dan (11,07± 0,25) mm terhadap S.aureus.The extract of various plant parts of the mangrove Excoecaria agallocha has been proved as a potential source, for example the extract of leaves, root, bark and also sap. The sap is used for fish poison and temporary blindness if it gets into the eyes. This research for analyse antibacterial activity of extract sap of mangrove E. agallocha with kloroform solvent againts Escherichia coli and Staphylococcus aureus. This research include extraction and antibacterial activity test. This experiment use one control and four different concentration of chloroform extract (1 µg/disc, 5 µg/disc, 10 µg/disc dan 50µg/disc). The result showed that the sap extract of mangrove E. agallocha with chloroform solvent has antibacterial activity to inhibit E. coli dan S. aureus growth with minimum inhibitory concentration (9,67 ± 0,32 ) mm to E. coli dan (11,07± 0,25) mm to S.aureus.

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