cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
Jurnal Kelautan Tropis
Published by Universitas Diponegoro
ISSN : 14108852     EISSN : 25283111     DOI : -
Core Subject :
Arjuna Subject : -
Articles 451 Documents
 18   19   20   21   22 
Pemetaan Kompleksitas Habitat Dasar Perairan Menggunakan Data Batimetri di Perairan Pulau Kemujan Karimunjawa Arip Rahman; Vincentius P. Siregar; James P. Panjaitan
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10498

Abstract

The complexity of the substrate of the bottom waters describes the diversity of the bottom structure of the waters. The structure of the complexity of bottom waters can be measured by the rugosity. Manual method for measuring rugosity can be used chain method. Besides that rugosity can be calculated using bathymetry data using Surface Area from Elevation Grid Extension tools that integrated in ArcGIS which produces Arc-chord ratio (ACR) rugosity. Based on this method, a flat area has rugosity close to 1, while an area with high elevated will show rugosity value higher then 1 (>1). Measurement of the complexity of the bottom waters is carried out to see the condition of benthic habitat in the shallow waters of Kemujan Island, Karimunjawa Islands. Based on the rugosity index, conditions of bottom waters of the Kemujan Island are quite complex (ACR rugosity index, 2-2.044). The ACR rugosity index correlated quite well with the rugosity index of the field measurement (r = 0.76).  Kompleksitas dasar perairan menggambarkan keragaman struktur dasar perairan. Struktur kompleksitas suatu dasar perairan dapat diukur dengan tingkat kekasaran (rugosity) dasar perairan. Metode pengukuran rugosity secara manual dilakukan dengan menggunakan metode rantai (chain). Selain itu rugosity juga dapat dihitung dengan menggunakan data kedalaman dengan menggunakan Surface Area from Elevation Grid Extension yang terintegrasi pada ArcGIS yang menghasilkan Arc-chord ratio (ACR) rugosity. Berdasarkan metode ini daerah datar memiliki nilai rugosity mendekati 1, sedangkan area dengan relief tinggi akan menunjukkan nilai rugosity yang lebih tinggi (>1). Pengukuran kompleksitas dasar perairan dilakukan untuk melihat kondisi habitat dasar di perairan dangkal Pulau Kemujan Kepulauan Karimunjawa. Berdasarkan indeks rugosity, kondisi dasar perairan Pulau Kemujan memiliki kompleksitas yang cukup tinggi (indeks ACR rugosity 2-2.044). Hal tersebut menggambarkan kondisi dasar perairan di sekitar lokasi penelitian cukup beragam. Indeks rugosity ACR berkorelasi cukup baik dengan indeks rugosity hasil pengukuran lapangan (r=0.76).
Variasi Temporal Karakteristik Arus di Perairan Tanjung Jati Kabupaten Jepara Baskoro Rochaddi; Aris Ismanto; Chrisna Adhi Suryono
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.11073

Abstract

The waters of Tanjung Jati, Jepara Regency, are quite strategic areas due to the utilization of the coastal areas and waters. One water parameter that is important to study and has a high enough influence on other parameters is ocean currents. The purpose of this study is to determine the characteristics of the ocean currents that occur in the waters of Tanjung Jati, by temporal variation in 2020 and 2021. The results show that the smallest current velocity is in the most basic layer; this is likely due to the influence of the friction force on the bottom of the water, while the greatest velocity is on the layer near the surface. Current characteristics show a relationship between current velocity, current direction, and water level that occurs in each layer of water. This relationship can be seen by the decrease in current velocity at the lowest tide and the highest tide, and vice versa. The current velocity increases at low tide. The highest optimal velocity at low tide towards tide compared to tidal currents towards ebb. The direction of this optimal current is northeast. The movement of the current at tide towards the ebb is towards the West - Southwest, while the current movement during the tide towards the tide is towards the East - Northeast direction. The direction of the dominant current that occurs in the waters of Tanjung Jati B, Jepara, is towards the East-Northeast domination at low tide and towards the West-Southwest domination at low tide. Details on the current characteristics of each layer in 2020 and 2021 have not changed significantly.  Kawasan perairan Tanjung Jati Kabupaten Jepara merupakan Kawasan yang cukup strategis dikarenakan pemanfaatan wilayah pesisir maupun perairannya. Terkait hal tersebut, sal;ah satu parameter perairan yang penting untuk diteliti dan mempunyai pengaruh cukup tinggi terhadap parameter lainnya adalah arus laut. Tujuan penelitian ini adalah mengetahui karakteristik arus laut yang terjadi di perairan Tanjung Jati, secara variasi temporal tahun 2020 dan 2021. Hasil penelitian menunjukkan Kecepatan arus terkecil berada pada layer paling dasar hal ini kemungkinan terjadi karena pengaruh gaya gesek dengan dasar perairan, sedangkan kecepatan paling besar berada pada layer dekat permukaan. Karakteristik arus seperti yang terlihat menunjukan adanya hubungan antara kecepatan arus, arah arus dengan elevasi air yang terjadi pada setiap lapis air. Hubungan ini dapat dilihat dengan adanya penurunan kecepatan arus pada saat muka air surut terendah dan pasang tertinggi dan sebaliknya kecepatan arus meningkat pada saat pasang menuju surut. Kecepatan optimal tertinggi pada saat arus surut menuju pasang dibandingkan dengan arus pasang menuju surut. Arah arus optimal ini adalah timur laut. Pergerakan arus pada saat pasang menuju surut adalah ke arah Barat – Barat Daya sedangkan pergerakan arus pada saat surut menuju pasang adalah ke arah Timur – Timur Laut. Arah arus dominan yang terjadi di kawasan Perairan Tanjung Jati B, Jepara adalah ke arah dominasi Timur- Timur Laut pada saat surut menuju pasang dan ke arah dominasi Barat-Barat Daya pada saat air pasang menuju surut. Detil pada karakteristik arus tiap layer pada tahun 2020 dengan 2021 tidak mengalami perubahan secara signifikan.
Percampuran Turbulen Di Laut Sulawesi Menggunakan Estimasi Thorpe Analisis Hadi Hermansyah; Agus Saleh Atmadipoera; Tri Prartono; Indra Jaya; Fadli Syamsudin
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.7352

Abstract

Dissipation of internal tides will cause mixing, The mixing process at sea plays a key role in controlling large-scale circulation and ocean energy distribution. The purpose of this research was to estimate the turbulent mixing values  (vertical eddy diffusivity) of water mass using Thorpe analysis. The results showed that the  location where strong mixing occurred in the “near-field” area around Sangihe Island with vertical diffusivity value . Even in areas far-field(far from the generating site) are found vertical diffusivity , the result of internal propagation tides dissipation. Based on the result of the observation, it shows that the level of kinetic energy of eddy turbulen dissipation (ε) in the Sulawesi Sea on all layers has an average value of . The value of ε in the thermocline layer is greatest  compared to the mixed surface layer and the almost homogeneous deep layer, the increase in mixing in the area near the ridge due to the closer water column to the base topography. The average turbulent rate of , the strongest fluctuation of value occurs in the thermocline layer, ranging from  to  with an average of about . The value of this turbulent mixing is higher than the previous measurements in some Indonesian ocean. This is allegedly due to the existence of a strong internal tidal energy and its interaction with topography in the Sulawesi Sea.Disipasi dari pasang surut internal akan menyebabkan terjadinya percampuran, proses percampuran di laut memainkan peran kunci dalam mengendalikan sirkulasi skala besar dan distribusi energi lautan. Tujuan dari penelitian ini adalah untuk mengestimasi nilai percampuran turbulen (difusivitas eddy vertikal) massa air dengan analisis Thorpe. Hasil penelitian ini menunjukkan bahwa percampuran yang kuat terjadi di area sekitar Pulau Sangihe-Talaud dengan nilai difusivitas vertikal . Bahkan pada area yang jauh dari pusat pembangkitan ditemukan difusivitas vertikal , hasil disipasi propagasi pasang surut internal. Berdasarkan hasil pengamatan menunjukan bahwa rata-rata tingkat energi kinetik disipasi turbulen eddy  Laut Sulawesi pada semua lapisan adalah . Nilai  di lapisan termoklin paling besar  dibandingkan dengan lapisan permukaan tercampur dan lapisan dalam yang hampir homogen, peningkatan percampuran di daerah dekat ridge disebabkan makin mendekatnya kolom air dengan topografi dasar. Rata-rata nilai percampuran turbulen sebesar , fluktuasi nilai yang paling kuat terjadi di lapisan termoklin, yang berkisar yaitu antara  sampai  dengan rerata sekitar . Nilai percampuran turbulen ini lebih tinggi dibandingkan dengan pengukuran sebelumnya di beberapa perairan Indonesia. Hal ini diduga karena adanya energi pasang surut internal yang kuat serta interaksinya dengan topografi yang ada di Laut Sulawesi.
Struktur Komunitas dan Kelimpahan Fitoplankton dan Zooplankton pada Musim Penghujan di Zona Intertidal Pantai Selatan Yogyakarta Ratih Ida Adharini; Namastra Probosunu
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10206

Abstract

Plankton is an organism that plays an important role as a water food reserve, which is influenced by environmental conditions. This study aims to determine the community structure, abundance and biodiversity of phytoplankton and zooplankton in the intertidal zone of south coast of Yogyakarta during the rainy season. The research was conducted at Pantai Drini, Kukup, and Sundak of Gunungkidul District during December 2016 - February 2017. Sampling was conducted on three observation stations in the intertidal zone of Drini Beach, Kukup, and Sundak twice a month. The water samples were taken with plankton nets number 25, then were fluidized in 4% formalin and stored at low temperatures. The results showed diversity index of plankton in Kukup Beach in January at 1.86 while the lowest value in February at Sundak Beach was 0.87. The highest plankton abundance in January at Sundak Beach was 900 individu L-1 while the lowest value in December at Kukup Beach was 217.8 individu L-1. Based on the diversity index of Shannon-Wiener, intertidal coast waters of Yogyakarta in wet season is categorized as moderate, and dominance index is categorized  as low. Plankton merupakan organisme yang berperan penting sebagai cadangan makanan perairan dan dipengaruhi oleh kondisi lingkungan. Penelitian ini bertujuan untuk mengetahui struktur komunitas, kelimpahan dan keanekaragaman plankton pada zona inertidal pantai selatan Yogyakarta selama musim penghujan. Penelitian dilakukan di Pantai Drini, Kukup, dan Sundak Kabupaten Gunungkidul selama bulan Desember 2016 – Februari 2017. Pengambilan sampel dilakukan pada tiga stasium pengamatan di zona intertidal Pantai Drini, Kukup, dan Sundak setiap dua minggu. Sampel air diambil dengan jaring plankton nomor 25, kemudian sampel plankton difiksasi dalam formalin 4% dan disimpan pada suhu rendah. Hasil penelitian menunjukan indeks keanekaragaman jenis plankton tetinggi di Pantai Kukup pada bulan Januari sebesar 1,86 sedangkan nilai terendah pada bulan Februari di Pantai Sundak sebesar 0,87. Kelimpahan plankton tertinggi pada bulan Januari pada Pantai Sundak sebesar 900 individu L-1 sedangkan nilai terendah pada bulan Desember di Pantai Kukup yaitu 217,8 individu L-1. Berdasarkan indeks keanekaragaman Shannon-Wienner maka indeks keanekaragaman di pantai selatan Yogyakarta tergolong rendah-sedang dengan indeks dominansi tergolong rendah.
Analisis Risiko Bencana Tsunami Di Pesisir Selatan Jawa Studi Kasus : Kabupaten Garut Kasman Kasman; Erwin Triokmen
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10271

Abstract

The Coastal Zone of Garut Regency is located on the southern coast of West Java which is directly opposite the confluence of the Indo-Australian plate and the Megathrust of the Sunda Strait and southern Java. This area has a high chance of an earthquake and tsunami disaster. This study aims to determine the level of risk of tsunami disasters in coastal villages of Garut Regency. This study uses several analytical methods, namely the calculation of the factor value with the Davidson standardized model and the map superimpose method with the scoring technique which is processed by Geographic Information System (GIS) software. Weighting is carried out using the Analytical Hierarchy Process (AHP) method to compare one factor with another in determining the priority of tsunami disaster. Based on the analysis of the risk level of the tsunami disaster, it was found that the level of risk of tsunami disasters was high in coastal villages, namely ± 6,734.66 hectares (about 17.02% of the total area of coastal villages), the level of risk for tsunami disasters was ± 4,137,32 Ha (about 10.45% of the total area of the coastal villages), and the level of tsunami risk is low, covering an area of ± 28,704.99 (about 72.53% of the total area of the coastal villages). The results of this research are expected to be used in designing spatial planning in coastal areas that are safe from tsunamis. Wilayah Pesisir Kabupaten Garut terletak di pantai selatan Jawa Barat yang berhadapan langsung dengan pertemuan lempeng Indo-Australia dan Megathrust Selat Sunda dan Jawa bagian selatan, sehingga memiliki peluang terjadinya bencana gempa bumi dan tsunami yang tinggi. Penelitian ini bertujuan mengetahui tingkat  risiko bencana tsunami di desa pesisir Kabupaten Garut dengan menggunakan beberapa metode analisis yaitu perhitungan nilai faktor dengan model standarisasi Davidson serta metode superimpose peta dengan teknik skoring yang prosesnya diolah dengan software Sistem Informasi Geografis (SIG). Selain itu untuk memperoleh nilai perbandingan antara beberapa faktor yang ditinjau dari segi pentingnya faktor tersebut terhadap faktor lainnya dalam menentukan penilaian prioritas terhadap risiko bencana tsunami maka dilakukan pembobotan dengan menggunakan metode proses hierarki analitik (Analytical Hierarchy Process/AHP). Berdasarkan hasil analisis tingkat risiko bencana tsunami, ditemukan bahwa tingkat risiko bencana tsunami tinggi di desa-desa pesisir yaitu seluas ±6.734,66 Ha (sekitar 17,02% dari total luas desa-desa pesisir), tingkat risiko bencana tsunami sedang seluas ±4.137,32 Ha (sekitar 10,45% dari total luas desa-desa pesisir), dan tingkat risiko bencana tsunami rendah, seluas ±28.704,99 (sekitar 72,53% dari total luas desa-desa pesisir). Hasil riset ini diharapkan dapat digunakan dalam menyusun penataan ruang di wilayah pesisir yang aman dari tsunami.
Pengaruh Padatan Tersuspensi terhadap Konsentrasi Klorofil-a dan Fosfat Inorganik Terlarut di Muara Banjir Kanal Barat, Semarang Jarot Marwoto; Oceana Windyartanti; Muslim Muslim
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10703

Abstract

The large number of activities along the West Banjir Kanal river has triggered a change in the condition of its sea waters. The condition most affected is turbidity which caused high concentration of Total Suspended Solid (TSS) in estuary waters and interfere with the entry of sunlight into the waters. The purpose of the study is to determine the effect of the of concentration TSS on the concentration chlorophyll a and dissolved inorganic phosphate (DIP) in the waters of West Banjir Kanal estuary. Water sampling was conducted on October 3, 2019. Water quality parameters such as brightness, pH, temperature, DO and salinity were measured in situ. Meanwhile, chlorophyll a, TSS and DIP measurements were analyzed in the laboratory. The results showed that the highest concentration of TSS, chlorophyll a and DIP were in the estuary area and decreased with further distance from the river mouth with concentration were 70.17-151.50 mg/L, 0.03–2.67 µg/L and 0.71–0.98 µM respectively. Based on the results of the Principal Component Analysis (PCA) showed that TSS affected chlorophyll a by 8.7% (r=0.392; p<0.05) and DIP by 54.46% (r=0.931; p<0.01). The low regression between TSS and chlorophyll a was due to the presence of large amounts of inorganic particles in the West Banjir Kanal river, which makes the river waters become turbid. So, the turbidity of the waters caused the release of phosphate in the sediment to water column which was used by phytoplankton for photosynthesis, so the TSS not only contain sediment particles, but also phytoplankton. Banyaknya aktivitas di sepanjang sungai Banjir Kanal Barat Semarang, memicu kondisi perairan lautnya menjadi berubah.  Kondisi yang paling terpengaruh adalah kekeruhan yang menyebabkan tingginya konsentrasi Material Padatan Tersuspensi (MPT) di perairan muara dan mengganggu masuknya cahaya matahari ke perairan. Penelitian ini bertujuan untuk mengetahui pengaruh MPT terhadap konsentrasi klorofil-a dan fosfat inorganik terlarut (DIP=Dissolved Inorganic Phosphate) di perairan Muara Banjir Kanal Barat Semarang. Pengambilan sampel air dilakukan pada tanggal 3 Oktober 2019. Parameter kualitas perairan seperti kecerahan, pH, suhu, DO dan salinitas diukur secara in situ. Sedangkan pengukuran klorofil-a, MPT dan DIP dianalisis di laboratorium. Hasil penelitian menunjukkan bahwa konsentrasi MPT, klorofil-a dan DIP tertinggi di daerah muara sungai dan menurun dengan makin jauhnya muara sungai dengan konsentrasi secara berturut-turut sebesar 70,17-151,50 mg/L, 0,03-2,67 µg/L dan 0,71-0,98 µM. Berdasarkan hasil Analisis Komponen Utama (AKU) menunjukkan bahwa MPT mempengaruhi klorofil-a sebesar 8,7% (r = 0,392; P < 0,05) dan fosfat inorganik terlarut sebesar 54,46% (r = 0,931; P < 0,01). Rendahnya hubungan antara MPT dengan klorofil-a ini disebabkan oleh adanya masukan partikel anorganik dalam jumlah besar di badan Sungai Banjir Kanal Barat yang membuat perairan sungai menjadi keruh. Jadi kekeruhan perairan menyebabkan terlepasnya fosfat di sedimen yang dimanfaatkan oleh fitoplankton untuk proses fotosintesa, sehingga yang terkandung dalam MPT selain partikel sedimen juga fitoplankton.
Uji Aktivitas Antimalaria dari Spons Xestospongia sp. Asal Pulau Yapen secara In Vivo Murtihapsari Murtihapsari; Mathelda K. Roreng; Apriani Parubak; Alif Rahman
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10107

Abstract

It is generally admitted that marine sponge has rich of secondary metabolite as alkaloids, peptides and terpene. Those various compounds can be used for antimalarial drug.  This study aims to evaluate the in vivo antimalarial activity and to characterize the effectiveness of dose (ED50) of n-hexane extracted from Xestospongia sp. by using the Plasmodium berghei infected to mices. In the present study, we used Peter’s four day suppressive test, where the mice infected with Plasmodium berghei intra peritoneal with a suspension containing infected red blood cell origin from donor mice with parasitemia. Results of present study exhibited that the sponge Xestospongia sp. contains secondary metabolite including tritepenoid/steroid, alkaloid and saponin. Furthermore, an in vivo test revealed the affectivity dose (ED50) was 0.24 mg/kg of body weight. This finding is categorized a signifant decreasing level of parasitemia.   Secara umum, spons laut mempunyai kandungan metabolit sekunder seperti alkaloid, peptide dan terpena. Berbagai senyawa tersebut dapat dimanfaatkan sebagai obat antimalaria. Penelitian ini bertujuan untuk mengetahui kandungan kimia dan mengevaluasi aktivitas antimalarial secara in vivo untuk efektivitas dosis (ED50) ekstrak n-heksana dari spons Xestospongia sp. dengan menggunakan Plasmodium berghei yang diinfeksi ke tikus. Penelitian ini digunakan metode the 4-day Supresive Test, dimana mencit yang diinfeksi Plasmodium berghei secara intra peritoneal dengan suspensi yang mengandung sel darah merah terinfeksi yang berasal dari mencit donor. Hasil penelitian ini menunjukkan adanya kandungan metabolit sekunder diantaranya tritepenoid/steroid, alkaloid dan saponin. Selanjutnya, uji in vivo diperoleh nilai ED50 sebesar 0,24 mg/kg BB dikelompokan sangat baik, yang dapat menurunkan tingkat parasitemia secara signifikan. Dengan demikian, spons laut asal pulau Yapen dapat dijadikan sebagai sumber metabolit potensial untuk obat antimalaria.
DNA Barcoding and CITES-Listed Wedgefish (Rhynchobatidae, Rhinidae) from South Bangka, Indonesia Okto Supratman; Siti Aisyah; Novi Santia; Okto Supratman; Ahmad Fahrul Syarif; Anggraeni Anggraeni
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10454

Abstract

Overfishing of wedgefish greatly affects its population and the balance of the marine ecosystem. This is exacerbated by their relatively low fecundity, slow growth, and late maturity results in one of the lowest population growth rate within elasmobranch species. However, lacking database information results in insufficient regulations and surveillance of wedgefish fishing. The current situation is feared to the risk of wedgefish’s survival, especially in Bangka Belitung Islands, Indonesia. Fundamental to a database is the accurate identification of wedgefish species based on mitochondrial DNA (mtDNA) analysis. This study aimed to use DNA barcodes to identify, determine the conservation status, and the status according to the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES). We collected samples including unidentified fin samples from confiscated illegal fishing catches, the traditional markets and fishing docks, South Bangka. In this research, we used DNA Barcoding (mitocondrial DNA, COI gene) to identify and examine of wedgefish samples. The tissue samples used in this study were identified as species listed in CITES Appendix II, they are Rhynchobatus australiae, Rhynchobatus springeri and Rhina ancylostoma. According to the IUCN Red List, 100% of the wedgefish species found are Critical Endangered at the global level.
Hubungan Faktor Biotik dan Abiotik Terhadap Keanekaragaman Makrobentos di Hutan Mangrove Kabupaten Lombok Barat Nirmala Ayu Aryanti; Febri Arif Cahyo Wibowo; Mahidi Mahidi; Frita Kusuma Wardhani; I Komang Tri Wijaya Kusuma
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10044

Abstract

High human activity around the coastal area will affect the mangrove ecosystem and the biota such as macrobenthos. Benthic diversity can reflect conditions of mangrove ecosystem, that slow growth and sensitive to environmental changes. This study aims to determine the influence of biotic and abiotic environments on the macrobenthos in Cendi Manik Village, Sekotong District, West Lombok Regency, West Nusa Tenggara. Data collection of macrobenthos, biotic and abiotic environments in natural and rehabilitation mangrove, then the diversity species of macrobenthos with biotic and abiotic environmental variables were analyzed multiple regression. The most dominant vegetations are Rhizophora mucronata Lam and Avicennia marina Forssk. The diversity index for macrobenthos is low (H’ 1,207) in natural and rehabilitation mangrove. Macrobenthos between two location have high similarity with 84,6%. The result of multiple regression test showed that most influencing of macrobenthos were mud thickness and brightness.  Aktivitas manusia yang tinggi sekitar kawasan pesisir akan mempengaruhi ekosistem mangrove dan biota di dalamnya seperti makrobentos. Keanekaragaman bentos dapat mampu mencerminkan kondisi ekosistem mangrove, pertumbuhan yang lambat dan sensitif terhadap perubahan lingkungan. Penelitian ini bertujuan untuk mengetahui hubungan lingkungan biotik dan abiotik terhadap makrobentos yang ada di Desa Cendi Manik Kecamatan Sekotong Kabupaten Lombok Barat Nusa Tenggara Barat. Pengumpulan data makrobentos, biotik dan abiotik lingkungan pada hutan mangrove alam dan rehabilitasi, kemudian keanekaragaman jenis makrobentos dengan variabel lingkungan biotik dan abiotik dianalisis regresi berganda. Jenis vegetasi yang paling mendominasi adalah jenis Rhizophora mucronata Lam dan Avicennia marina Forssk. Keanekaragaman jenis makrobentos termasuk dalam kategori rendah (H’ 1,207) di hutan mangrove alam dan rehabilitasi. Jenis makrobentos antara dua lokasi tersebut memiliki kemiripan yang tinggi yaitu 84,6 %. Uji regresi berganda diperoleh variabel lingkungan yang paling berpengaruh pada keanekaragaman jenis makrobentos adalah ketebalan lumpur dan kedalaman kecerahan air. 
Konservasi Genetik Ikan Kakap Putih (Lates calcarifer, Bloch, 1790) Melalui Pendekatan DNA Barcoding dan Analisis Filogenetik di Sungai Kumbe Merauke Papua Dandi Saleky; Muhammad Dailami
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10760

Abstract

Genetic data is very important as the basis for fisheries management and conservation related to connectivity between regions and population structure. White snapper Fish is one of the fish that has high economic value which is utilized either by its meat or by its swim bladder. This research was aimed to identify the species of white snapper fish were collected from the Kumbe River, Merauke Regency, Papua using the Cytochrome Oxidase I gene. The results shows that this sample is a species of Lates calcarifer, Bloch, 1790 with 100% similarity. The haplotype of white snapper fish from Merauke has similarities with the haplotype from Australia, Malaysia and China, this indicating that there is gene flow and connectivity among those locations. The phylogenetic tree explains the grouping of species based on genetic distance and the level of DNA Sequences similarities. Molecular approach can be used in the management and conservation of fish with high economic value.

Page 20 of 46 | Total Record : 451

 18   19   20   21   22 

Filter by Year

2015 2026


Reset
Filter By Issues
All Issue Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS (inpress) Vol 28, No 3 (2025): JURNAL KELAUTAN TROPIS Vol 28, No 2 (2025): JURNAL KELAUTAN TROPIS Vol 28, No 1 (2025): JURNAL KELAUTAN TROPIS Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS Vol 26, No 2 (2023): JURNAL KELAUTAN TROPIS Vol 26, No 1 (2023): JURNAL KELAUTAN TROPIS Vol 25, No 3 (2022): JURNAL KELAUTAN TROPIS Vol 25, No 2 (2022): JURNAL KELAUTAN TROPIS Vol 25, No 1 (2022): JURNAL KELAUTAN TROPIS Vol 24, No 3 (2021): JURNAL KELAUTAN TROPIS Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS Vol 24, No 1 (2021): JURNAL KELAUTAN TROPIS Vol 23, No 3 (2020): JURNAL KELAUTAN TROPIS Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS Vol 23, No 1 (2020): JURNAL KELAUTAN TROPIS Vol 22, No 2 (2019): JURNAL KELAUTAN TROPIS Vol 22, No 1 (2019): JURNAL KELAUTAN TROPIS Vol 21, No 2 (2018): JURNAL KELAUTAN TROPIS Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS Vol 20, No 2 (2017): JURNAL KELAUTAN TROPIS Vol 20, No 1 (2017): JURNAL KELAUTAN TROPIS Vol 19, No 2 (2016): JURNAL KELAUTAN TROPIS Vol 19, No 1 (2016): JURNAL KELAUTAN TROPIS Vol 18, No 3 (2015): JURNAL KELAUTAN TROPIS Vol 18, No 2 (2015): JURNAL KELAUTAN TROPIS Vol 18, No 1 (2015): JURNAL KELAUTAN TROPIS More Issue