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Jurnal Kelautan Tropis
Published by Universitas Diponegoro
ISSN : 14108852     EISSN : 25283111     DOI : -
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Articles 451 Documents
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Indonesia Marine Debris: Banda Aceh Coastal Environment Identification Koko Ondara; Ruzana Dhiauddin
Jurnal Kelautan Tropis Vol 23, No 1 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i1.6238

Abstract

Banda Aceh City, having an area of 61.36 km² with a coastline of 11 km which covers Ulee Lheu Beach to Alue Naga Beach. The research was carried out to determine marine debris statistics (type, amount and mass) which divided into 7 categories; plastic, metal, glass, rubber, processed wood (organic), clothing, and ceramics. This research also conducted to complement the Indonesian marine debris data which currently incomplete. We choose Banda Aceh as the preliminary location because its area affected by dynamic oceanographic parameters of the Indian Ocean, Bay of Bengal and bordered by several countries that could be a source of marine debris, thus making this research is important to do. Marine debris data were collected from March to May 2019, on the coast and waters surface. Data collection on the beach is carried out every 28 days using the transect method, while on the water surface by riding boats using visual observation techniques. Statistical results show that inorganic litter has the highest percentage and mass, which a mass density reached 288.37 g/100 m2 at Ulee Lheu Beach and 64.96 g/1 00 m2 at Alue Naga Beach. Plastic type dominates the type of marine debris on the beach about 92.2% and 51.4% on the water surface. The amount of plastic especially bottle continues to accumulate, it will not only endanger marine waters ecosystem but also potential to affect and damage the coastal environment. The results of this study are expected to provide input / recommendations for the government and related institutions in waste management in coastal and marine areas and tourism in a sustainable and sustainable way.
Pengaruh Karakteristik Sedimen terhadap Distribusi dan Akumulasi Logam Berat Pb dan Zn di Perairan Sungai, Estuaria, dan Pantai Najamuddin Najamuddin; Irmalita Tahir; Rustam E. Paembonan; Inayah Inayah
Jurnal Kelautan Tropis Vol 23, No 1 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i1.5315

Abstract

The purpose of the study was to analyze the effect of surface sediment characteristics including texture, organic carbon content, and redox potential of sediments on the distribution and accumulation of heavy metals Pb and Zn in three different water zones of each river, estuary and coast. Sediment texture was determined by pipette method, organic carbon content in sediments using Walkley and Black method, redox potential of sediments measured by Eh Meter, and concentrations of heavy metals Pb and Zn in sediments with Atomic Absorption Spectrophotometer with graphite furnace system. The results showed that the distribution and accumulation pattern of heavy metals Pb was similar to Zn where the highest concentration was in the coastal waters zone and the lowest was in the estuary waters zone. Sediment texture in the three zones of the dominant was sand. The percentage of organic carbon content in sediments ranges from 1.63-3.25% and the sediment redox potential was classified as reduction and transition zones. The parameters of texture, organic carbon content, and sediment redox potential have a significant influence on the distribution and accumulation of heavy metals Pb and Zn in sediments in all three water zones. Tujuan penelitian adalah menganalisis pengaruh karakteristik sedimen permukaan meliputi tekstur, kandungan karbon organik, dan potensial redoks sedimen terhadap distribusi dan akumulasi logam berat Pb dan Zn di tiga zona perairan berbeda masing-masing sungai, estuaria, dan pantai. Tekstur sedimen ditentukan dengan metode pipet, kandungan karbon organik dalam sedimen dengan metode Walkley and Black, potensial redoks sedimen diukur dengan Eh Meter, dan konsentrasi logam berat Pb dan Zn dalam sedimen dengan Spektrofotometer Serapan Atom dengan sistem graphite furnace. Hasil penelitian menunjukkan pola distribusi dan akumulasi logam berat Pb serupa dengan Zn dimana konsentrasi tertinggi di zona perairan pantai dan terendah zona perairan estuaria. Tekstur sedimen pada tiga zona perairan dominan berupa fraksi pasir (sand). Persentase kandungan karbon organik dalam sedimen berkisar antara 1,63-3,25 % dan nilai potensial redoks sedimen termasuk kategori zona reduksi dan transisi. Parameter tekstur, kandungan karbon organik, dan potensial redoks sedimen memberikan pengaruh nyata terhadap distribusi dan akumulasi logam berat Pb dan Zn dalam sedimen pada ketiga zona perairan. 
Diversitas Ikan Karang pada Berbagai Variasi Substrat Karang Mati di Perairan Pulau Liukangloe, Kabupaten Bulukumba Chair Rani; Abdul Haris; Ahmad Faizal
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.6484

Abstract

Microhabitat variation was one of the key factors that determine diversity of organism associated in coral reefs. The purposed of this study was to analyze species richness and density of reef fish associated with various dead coral substrates. In addition, it also analyzes spatial distribution of reef fishes. Stationary visual census technique was applied to record data of fish speceis number and density on 4 forms of dead coral substrate (massive, branching, tabulate, rubbles, and natural/living corals as a control). The observation area was 2x 2 m and 5 replications were carried out for each substrate.The analysis of variance was to used to compare the number of species and density between substrates and correspondence analysis was used to analyse spatial distribution. Equivalent proportions were found for major, target, and indicator fish, on branching, tabulate and live coral substrates. Dead coral substrates were dominated by target and indicator fish, whereas rubbles were dominated by major and target fish groups. Individual composition was dominated by indicator fish, except for coral rubble which was dominated by target fish. The substrate in the form of branching corals have a higher species richness and fish density compared to rubble, but not significantly different from the tabulate corals and natural corals. Indicator fish (family Chaetodontidae) was spatially distributed mostly on live corals, rubbles were characterized by high Acanthurus pyropherus, Arothron mappa, Halichoeres hotulanus, Abudefduf vagiensis, Caesio xanthonota,and Dascylus auranus, and dead corals were characterized by species of major fish.  Variasi mikrohabitat di daerah terumbu karang menjadi salahsatu faktor kunci yang menentukan keragaman biota yang berasoiasi dengan terumbu karang. Penelitian ini bertujuan untuk menganalisis kekayaan jenis dan kepadatan ikan karang pada berbagai bentuk substrat karang mati. Selain itu, juga menganalisis sebaran spasial ikan karang. Teknik stationary visual censusdiaplikasikan untuk mendata ikan pada 4 bentuk substrat karang mati (masif, branching, tabulate, pecahan karang mati, dan karang alami/hidup sebagai kontrol). Luas area pengamatan sebesar 2x2 m2 dan dilakukan 5 kali pengulangan untuk setiap substrat.. Perbandingan jumlah jenis dan kepadatan ikan antara substrat dilakukan dengan analisis ragam dan sebaran spasial dengan analisis koresponden. Ditemukan proporsi yang setara untuk ikan major, indikator, dan target pada substrat branching, tabulate dan karang hidup. Substrat karang mati, didominasi oleh ikan target dan ikan indikator. Sedangkan pada substrat berupa pecahan karang mati didominasi oleh kelompok ikan major dan target. Komposisi individu didominasi oleh ikan indikator, kecuali pada substrat pecahan karang, didominasi oleh ikan target. Pada substrat dengan bentuk branching memiliki kekayaan spesies dan kepadatan ikan yang lebih tinggi dibandingkan dengan pecahan karang, namun tidak berbeda nyata dengan substrat karang tabulate dan karang alami.Sebaran spasial ikan indikator (famili Chaetodontidae) banyak ditemukan di substrat karang hidup, sedangkan pada substrat pecahan karang dicirikan oleh tingginya kepadatan ikan Acanthurus pyropherus, Arothron mappa, Halichoeres hotulanus, Abudefduf vagiensis, Caesio xanthonota, dan Dascylus auranus. Ikan major merupakan penciri pada substrat karang mati.
Daerah Penangkapan Potensial Tuna Madidihang Thunnus albacares, Bonnaterre, 1788 (Teleostei:Scombridae) di Laut Seram Jacobus Bunga Paillin; Delly Dominggas Paulina Matrutty; Stany Rachel Siahainenia; Ruslan Husen Saban Tawari; Haruna Haruna; Putri Talahatu
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.7073

Abstract

This research aims are to determine the potential fishing grounds of yellowfin tuna based on the approach of sea surface temperature, chlorophyll-a and catches in the Ceram Sea. Overall catches of 407 Individuals. In January the total catches were 66 individuals (14.44%), in February 67 individuals (14.66%), in March 84 individuals (18.38%), in April 116 individuals (25.38%) and in May 124 individuals (27.13%). The distribution of sea surface temperature and chlorophyll-a in the Ceram Sea in January-May 2019 looks varied. In January the average sea surface temperature was 29.13 oC, in February sea surface temperature was 29.54 oC, in March sea surface temperature was 30.12 oC, in April sea surface temperature was 30.12 oC, in May sea surface temperature was 29.77 oC. Chlorophyll-a concentration in January and February was 0.21 mg/m3, March was 0.20 mg/m3, April was 0.16 mg/m3, and May was 0.25 mg/m3. The results of the t-test analysis showed the P-value of sea surface temperature was 0.009<0.05, chlorophyll-a P-value 0.00048<0.05. Determination of potential fishing areas based on sea surface temperature, chlorophyll-a, and CPUE indicators shows that potential fishing areas are found in January, February, March, and May, while in April are in the medium potential category. Penelitian ini dilaksanakan dengan tujuan menentukan daerah penangkapan potensial Tuna madidihang berdasarkan pendekatan suhu permukaan laut, klorofil-a dan hasil tangkapan di Laut Seram.  Secara keseluruhan hasil tangkapan ikan tuna madidihang sebanyak 407 Individu. Bulan Januari total hasil tangkapan sebanyak 66 individu (14.44%), bulan Februari 67 individu (14.66%), bulan Maret 84 individu (18.38%), bulan April 116 individu (25.38%) dan bulan Mei 124 individu (27.13%). Sebaran suhu permukaan laut dan klorofil-a di Laut Seram pada bulan Januari-Mei 2019 terlihat bervariasi. Bulan Januari rata-rata suhu permukaan laut sebesar 29.13 oC, bulan Februari suhu permukaan laut 29.54 o, bulan Maret suhu permukaan laut 30.12 oC, bulan April suhu permukaan laut 30.12 oC, bulan Mei suhu permukaan laut 29.77 oC. Konsentrasi klorofil-a pada bulan Januari dan Februari sebesar 0.21 mg/m3, bulan Maret sebesar 0.20 mg/m3, bulan April sebesar 0.16 mg/m3, dan bulan Mei sebesar 0.25 mg/m3.  Hasil analisis uji t menunjukan nilai P-value suhu permukaan laut sebesar 0,009<0,05, klorofil-a P-value 0,00048<0,05. Penentuan daerah penangkapan ikan potensial berdasarkan indikator suhu permukaan laut, klorofil-a dan CPUE menunjukkan daerah penangkapan ikan potensial terdapat pada bulan Januari, Februari, Maret, dan Mei, sedangkan pada bulan April berada dalam kategori potensial sedang. 
Karakter Anatomi Daun sebagai Bentuk Adaptasi Tumbuhan Penyusun Zonasi Mangrove di Banggai Kepulauan, Provinsi Sulawesi Tengah Eka Fatmawati Tihurua; Esthi Liani Agustiani; Kusuma Rahmawati
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.7048

Abstract

Mangrove is an essential ecosystem that are located in the transition area of fresh and sea water. Therefore, species that grow are typical species that are able to adapt to the saline environment. The aim of this research is to characterize leaf anatomical structure for every species that compose the communities found in each mangrove zonations, including their similarities and dissimilarities characteristic. Sampling of examined leaf was carried out in the mangrove areas of Peling Island and Bakalan Island by making plots in four sites of the mangrove ecosystem area. Methods for leaf anatomical preparations were carried out using the paraffin-tert-butanol and paradermal sections. Anatomical characters as an adaptation to saline habitat are found in all species of mangrove plants, including thick cuticle and epidermal cells, thick leaves and water-storage tissue (hypodermis). In addition, there is found the presence of cork warts and sclereid as characteristic of the genus Rhizophora. Based on quantitative character observations, the mesophyll (palisade to sponge) ratio range from 0.28 ± 0.04 μm to 1.19 ± 0.42 μm, leaf thickness ratio 289,41 ± 38,21 μm to 695,20 ± 97,50 μm and the highest stomata density is owned by Lumnitzera littorea
Aktivitas Antibakteri Ekstrak Metanol Kulit Batang Rhizophora mucronata Poiret terhadap Salmonella thypi, Lignières 1900 (Enterobacteriaceae : Gammaproteobacteria) Mahmiah Mahmiah; Serdian Pinaris Rama; Pramudita Riwanti
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.5577

Abstract

Typhoid fever is an acute infectious disease of the small intestine caused by Salmonella typhi or Salmonella paratyphi A, B and C. Antibiotics commonly used for Salmonella infections are fluoroquinolones and tetracyclines. However, Salmonella has been resistant to these antibiotics. The many occurrences of antibiotic resistance encourage researchers to find solutions. Rhizophora mucronata is a mangrove from the family Rhizophoraceae. Phytochemically, Rhizophora mucronata is rich in many kinds of compounds such as tannins, alkaloids, flavanoids, terpenoids and saponins which important in suppressing pathogenic microorganisms. This study aims to determine the antibacterial activity of methanol extract of Rhizophora mucronata bark against the growth of Salmonella typhi bacteria looked at the clear zone around the well. This research is an experimental laboratory study using the well diffusion method. Rhizophora mucronata bark samples were extracted by maceration method. The results is the inhibition zone diameter methanol extract of Rhizophora mucronata bark with concentrations of 20%, 40%, 60% and 80% (b / v) classified as moderate (9.22 mm) to strong (13.78 mm) , the greater the concentration, the greater the diameter of the inhibition zone.  Demam tifoid adalah penyakit infeksi akut usus halus yang disebabkan oleh bakteri Salmonella typhi atau Salmonella paratyphi A, B dan C. Antibiotik yang umum digunakan dalam penatalaksanaan infeksi bakteri yang disebabkan oleh bakteri Salmonella adalah fluoroquinolones dan tetrasiklin. Akan tetapi, Salmonella telah mengalami resisten terhadap antibiotik tersebut. Rhizophora mucronata merupakan mangrove dari famili Rhizophoraceae. Secara fitokimia, Rhizophora mucronata kaya dengan beberapa macam senyawa seperti tannin, alkaloid, flavanoid, terpenoid dan saponin yang berperan penting dalam menekan mikroorganisme patogen. Penelitian ini bertujuan untuk menentukan aktivitas antibakteri ekstrak metanol kulit batang Rhizophora mucronata terhadap pertumbuhan bakteri Salmonella typhi dengan melihat adanya zona bening disekitar sumuran. Penelitian ini merupakan penelitian eksperimental laboratories dengan menggunakan metode difusi sumuran. Sampel kulit batang Rhizophora mucronata dilakukan ekstraksi dengan metode maserasi. Hasil penelitian menunjukkan bahwa diameter zona hambat yang dihasilkan oleh ekstrak metanol kulit batang Rhizophora mucronata dengan konsentrasi 20 %, 40 %, 60 % dan 80 % (b/v) tergolong sedang (9,22 mm) hingga kuat (13,78 mm), semakin besar kosentrasi maka semakin besar juga diameter zona hambatnya.
Perubahan Garis Pantai di Perairan Muara Sungai Musi Hubunganya dengan Sedimentasi Beta Susanto Barus; Ellis Nurjuliasti Ningsih; Melki Melki
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.6708

Abstract

Musi Estuary is strongly influenced by various land activities such as plantations, industry, agriculture and others. These activities have a negative effect on the condition of these waters, one of which is sedimentation. Sedimentation is an important factor that must be considered during development such as port construction and reclamation. This study aims to analyzed the dynamics of shoreline changes in the Musi Estuary, South Sumatra associated with sediment characteristics and sedimentation rates in the area. This research was carried out by installing a sediment trap for 14 days. Trapped sediments were taken once a week and calculated the volume and rate of sediment accumulation. The results showed that the dominant sedimentary characteristics in Musi Estuary were dominated by clay and mud with sediment accumulation rates ranging from 86,63-97,97 mg/cm2/day. The results of the dynamics of shoreline changes in the form of abrasion at stations 2, 3, 4, 5 and 6 and sedimentation at Station 1. The highest land change by abrasion was found at station 6 with land changes ± 129, 83 meters in 5 years and land changes by sedimentation at station 1 with a reduction in land ± 13.31 meters in 5 years.  Muara Sungai Musi merupakan perairan muara yang sangat dipengaruhi oleh berbagai aktivitas daratan seperti perkebunan, industri, pertanian dan lain-lain. Aktivitas tersebut memberikan efek negatif terhadap kondisi perairan tersebut, salah satunya adalah sedimentasi. Sedimentasi menjadi faktor penting yang harus diperhatikan pada saat melakukan pembangunan seperti pembangunan pelabuhan dan reklamasi. Penelitian ini bertujuan untuk menganalisis dinamika perubahan garis pantai di Perairan Muara Musi, Sumatera Selatan dikaitkan dengan karakteristik sedimen dan laju sedimentasi di daerah tersebut. Penelitian ini dilakukan pada bulan November 2019 dan pengambilan sampel dilakukan dengan memasang sedimen trap selama 14 hari. Sedimen yang terperangkap diambil seminggu sekali dan dihitung volume dan laju akumulasi sedimen. Hasil penelitian menunjukkan bahwa karakteristik sedimen yang dominan di Muara Musi didominasi oleh tanah liat dan lumpur dengan tingkat akumulasi sedimen berkisar antara 86,63-97,97 mg/cm2/hari. Hasil dinamika perubahan garis pantai dalam bentuk abrasi di stasiun 2, 3, 4, 5 dan 6 dan sedimentasi di stasiun 1. Perubahan lahan oleh abrasi tertinggi ditemukan di stasiun 6 dengan perubahan lahan ±129,83 meter dalam 5 tahun dan perubahan lahan oleh sedimentasi di stasiun 1 dengan pengurangan lahan ±13,31 meter dalam 5 tahun.
Penentuan Cepat Toksisitas Logam Perak Menggunakan Bioluminesen Bakteri Laut Aliivibrio fischeri, Beijerinck, 1889 (Gammaproteobacteria: Vibrionaceae) Dedi Futra; Lee Yook Heng; Asmat Ahmad
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.7155

Abstract

Rapid determination of toxicity based on changes in the bioluminescent signal of marine bacterium Aliivibrio fischeri (A. fischeri) to evaluate toxicity of Ag(I) has been successfully developed. Assessment of toxicity was designed using inhibition of bioluminescent signal from A. fischeri bacteria, which was exposed with toxic material of Ag(I). This metal ion was utilized as a model of toxic material to evaluate the effects of cytotoxicity on bacteria cell. Measurement of bioluminescent were taken based on differences in bacterial cell signals before and after exposure to Ag(I) ion at an emission wavelength of 488±2 nm. The concentration of bacterial cell was used to assess the toxicity of Ag(I) at optical density (OD600 nm) of 0.78 Abs. The results found that the linear response of Ag toxicity was in the range of 0.05–10 mg/L, with EC50% of 8.42 mg/L for 4 minutes. The repeatability value within the relative standard deviation (RSD) was 2.5-4.7% (n=8).  The results demonstrated that the marine bacteria of A. fischeri have good potential to evaluate toxicity of toxic material in environmental samples. Penentuan cepat toksisitas berdasarkan perubahan sinyal bioluminesen bakteri laut Aliivibrio fischeri (A. fischeri) untuk mengevaluasi toksisitas logam perak (Ag(I)) telah sukses dikembangkan. Penilaian toksisitas didesain berdasarkan penghambatan sinyal bioluminesen bakteri A. fischeri oleh bahan toksik. Ion logam Ag(I) digunakan sebagai model bahan toksik untuk menilai efek sitotiksisitas pada sel bakteri. Pengukuran bioluminesen diambil berdasarkan perbedaan sinyal sel bakteri sebelum dan sesudah diekspos pada ion logam Ag(I) pada panjang gelombang emisi 488±2 nm. Konsentrasi sel bakteri yang digunakan untuk menilai toksisitas Ag(I) pada optikal densitas 600 (OD 600 nm) = 0.78 Abs.  Hasil kajian ditemukan bahwa respons linear toksisitas Ag(I) pada rentang 0.05–10 mg/L, dengan nilai EC50% sebesar 8.42 mg/L pada waktu respons 4 menit dan nilai repeatibilitas toksisitas diperoleh sebesar 2.5-4.7 % RSD (relatif standar deviasi, n=8). Hasil ini menunjukkan bahwa bakteri laut A. fischeri memiliki potensi yang baik untuk menilai toksisitas bahan toksik dalam sampel lingkungan.
Pengaruh Penambahan Enzim Bromelin pada Pakan terhadap Kecernaan Protein, Efisiensi Pemanfaatan Pakan dan Pertumbuhan Udang Windu Penaeus monodon, Fabricius 1798 (Malacostraca: Penaeidae) Diana Rachmawati; Johannes Hutabarat; Eko Nurcahya Dewi; Seto Windarto
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.7578

Abstract

Feed utilization efficiency is one of the problems that often faced by tiger shrimp (Penaeus monodon Fabricus) farmers, which is 40-60% of production costs used for feed. The efficiency of feed can be improved by the addition of the bromelains in the feed, which can hydrolyze proteins into simpler compounds to increase the digestibility of the feed protein. This study aims to examine the effect of bromelains in feed on protein digestibility (ADCp), feed utilization efficiency (EPP), and growth (RGR) of tiger shrimp. Tiger shrimp with an average weight of 2.8 ± 0.26 g / individual was obtained from the Brackish Water Aquaculture Development Centre (BBPBAP), Jepara. There were 6 treatments adding bromelains in the feed, A (0%), B (0.2%), C (0.4%), D (0.6%) and E (0.8%). Observation parameters, including ADCp, EPP, PER, RGR, SR, and water quality parameters. The results showed that the addition of the bromelains in feed increased ADCp, EPP, PER, RGR, but had no effect on the SR of tiger shrimp. Bromelains (0.4% / kg) of feed is the optimal dose of ADCp, EPP, and RGR, resulting in a maximum value of 82.59%, 88.17%, and 5.24% / day.   Permasalahan yang sering dihadapi pembudidaya udang windu (Penaeus monodon Fabricius) adalah efisiensi pemanfaatan pakan yang belum maksimal sehingga hampir 40-60% dari total biaya produksi untuk biaya pakan. Efisiensi pemanfaatan pakan dapat ditingkatkan dengan penambahan enzim bromelin dalam pakan yang mampu menghidrolisis protein menjadi senyawa yang lebih sederhana sehingga dapat meningkatkan daya cerna protein pakan. Penelitian ini bertujuan mengkaji pengaruh enzim bromelin dalam pakan terhadap kecernaan protein (ADCp), efisiensi pemanfaatan pakan (EPP) dan pertumbuhan (RGR) udang windu. Hewan uji berupa udang windu dengan bobot rata-rata 2,8±0,26 g/ekor diperoleh dari Balai Besar Perikanan Budidaya Air Payau (BBPBAP), Jepara sebagai tempat penelitian. Terdapat 6 perlakuan penambahan enzim bromelin dalam pakan yaitu A (0 %), B (0,2 %), C (0,4 %), D (0,6 %) dan E (0,8 %). Pengamatan parameter meliputi ADCp, EPP, PER, RGR, SR dan parameter kualitas air. Hasil penelitian menunjukkan bahwa penambahan enzim bromelin dalam pakan meningkatkan ADCp, EPP, PER, RGR, namun tidak berpengaruh pada SR udang windu. Enzim bromelin 0,4%/kg pakan merupakan dosis optimal pada ADCp, EPP dan RGR menghasilkan nilai maksimal sebesar 82,59%, 88,17% dan 5,24%/hari.
Pengaruh Liang Boleophthalmus pectinirostris (Linnaeus, 1758) (Actinopterygii:Gobiidae) terhadap Biomassa Mikrofitobenthos di Ekosistem Mangrove Pandansari Brebes Jawa Tengah Allsay K.A. Cintra; Selvia Oktaviyani; Tyani Fitrian; Nurul D.M. Sjafrie
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.6977

Abstract

Mudskippers (Boleophthalmus pectinirostris) in temperate climates make burrows and shallow ponds surrounded by mud walls as a provider of microhabitats for microphytobenthos. In the mangrove ecosystem of Pandansari Brebes there are also Boleophthalmus pectinirostris which make burrows. The purpose of this study is to determine the effect of the Boleophthalmus pectinirostris burrow as a microhabitat for microphytobenthos in the mangrove ecosystem of Pandansari, Kaliwlingi village, Brebes. This research was conducted in mangrove and mudflat beach areas with three transects and three replications each. Samples were taken were burrow structures, temperature, and microphytobenthos biomass in the inner and outer area of the burrow. The results showed a total area of burrows in mudflat beach areas 71.93 ± 24.9cm2/m2 was greater than in mangrove areas 50.51 ± 46.9cm2/m2 because the beach has more mud than in mangrove. Microphytobenthos biomass was fewer in mudflat beach areas than mangrove areas because the density of Boleophthalmus pectinirostris was more on the mudflat. There was no difference in microphytobenthos biomass inside the burrow (mangrove: 1623 ± 1108µg/mm2; mudflat beach: 94.5 ± 67.5µg/mm2) from outside the burrow (mangrove: 2484 ± 3161µg/mm2; mudflat beach: 145 ± 151µg/mm2). This shows that the Boleophthalmus pectinirostris burrow in Pandansari Brebes does not provide microhabitats for microphytobenthos. This is because in the tropics the temperature is almost the same every year so that microphytobenthos can always live every year.  Ikan gelodok (Boleophthalmus pectinirostris) di daerah beriklim temperate membuat liang dan juga kolam dangkal yang di kelilingi oleh dinding lumpur sebagai penyedia mikrohabitat bagi mikrofitobenthos. Di ekosistem mangrove Pandansari Brebes juga terdapat B. pectinirostris yang membuat liang. Tujuan penelitian ini mengetahui pengaruh liang ikan gelodok jenis B. pectinirostris sebagai mikrohabitat bagi mikrofitobenthos di ekosistem mangrove daerah Pandansari desa Kaliwlingi Brebes. Penelitian ini dilakukan di daerah mangrove dan daerah pantai berlumpur dengan masing tiga transek dan tiga ulangan. Sampel yang diambil berupa struktur liang, suhu dan biomassa mikrofitobenthos di area dalam dan luar liang. Hasil menunjukan luas liang total lebih besar di daerah pantai 71,93±24,9 cm2/m2 karena pantai memiliki lumpur yang banyak daripada di daerah mangrove 50,51±46,9cm2/m2. Biomassa mikrofitobenthos lebih sedikit di daerah pantai daripada daerah mangrove karena kepadatan B. pectinirostris lebih banyak di pantai. Tidak ada perbedaan biomassa mikrofitobenthos secara signifikan di dalam liang (mangrove: 1623±1108µg/mm2; pantai: 94,5±67,5µg/mm2) dengan di luar liang (mangrove: 2484±3161µg/mm2; pantai:145±151µg/mm2) hal ini menunjukan liang B. pectinirostris di Pandansari Brebes tidak menyediakan mikrohabitat bagi mikrofitobenthos. Hal ini disebabkan di daerah tropis suhu tiap tahun yang hampir sama sehingga mikrofitobenthos dapat selalu hidup tiap tahun

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