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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences Management of Aquatic Resources Journal (Maquares) Journal of Marine Research Jurnal Kelautan : Indonesian Journal of Marine Science and Technology Jurnal Kelautan Tropis Aquacultura Indonesiana
Ali Djunaedi
Department Of Marine Sciences, Faculty Of Fisheries And Marine Sciences, Diponegoro University, Semarang
Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Library & Information Science

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Uji Aktivitas Antioksidan Ekstrak Kasar Keong Bakau (Telescopium telescopium) dengan Pelarut yang Berbeda terhadap Metode DPPH (Diphenyl Picril Hidrazil) Rahmayani, Ulfah; Pringgenies, Delianis; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.758 KB) | DOI: 10.14710/jmr.v2i4.3682

Abstract

Mangrove snail (Telescopium telescopium) is one of the marine gastropod and some communities use as foodstuff. The purpose of study was to find out the antioxidant activity by crude extract of mangrove snails (T. telescopium) using DPPH method in different solvents. The method consists of extraction using gradient solvent (chloroform, ethyl acetate and methanol), phytochemical test and antioxidant activity test using DPPH method. DPPH test using a series of concentration of 100 ppm, 200 ppm, 400 ppm and 800 ppm with triplicate repetition. IC50 values were determined by calculating the regression analysis % inhibition against the concentration of crude extract. The crude extract of mangrove snails is contained three bioactive components in the form of alkaloids, steroids and flavonoids.The results showed that the IC50 value of chloroform, ethyl acetate and methanol extract were 47274.00 ppm, 4143.58 ppm and 2329.81 ppm, respectively. The IC50 values of all crude extract have a very weak antioxidant activity (IC50 > 200 ppm), with IC50 of BHT as positive control was 4.91 ppm.
Kandungan Total Lipid Chlorella Vulgaris Yang Dikultur Dalam Media Yang Diinjeksi CO2 Jawa, Ivend Umbu; Ridlo, Ali; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.135 KB) | DOI: 10.14710/jmr.v3i4.11418

Abstract

Chlorella vulgaris biasa digunakan sebagai pakan alami dalam bidang budidaya. C.vulgaris sebagai produsen primer memerlukan CO2 dalam jumlah besar untuk proses fotosintesanya, sehingga berpotensi besar mampu menyerap dan mensintesis unsur karbon tersebut. CO2­ merupakan variabel pentingyangperludiperhatikan dalam budidayaC.vulgaris. Permasalahan yang timbul adalah CO2 tidak cukup disuplai melalui difusi sederhana dari udara karena konsentrasinya sangat rendah yaitu 0,03%. Tujuan dari penelitian ini adalah untuk mengetahuikandungan total lipidC.vulgaris yang dikultur dalam media yang di injeksi CO2. Perlakuan yang digunakan adalah injeksi CO2 selama 2 menit, 4 menit, 6 menit, 8 menit dan tanpa injeksi CO2 (kontrol). Kultur C.vulgarismenggunakan wadah erlenmeyer sebanyak 15 buah dengan volume 1 L yang diperkaya dengan pupuk Walne.Biota uji yang digunakan adalah C.vulgaris  yang diperoleh dari koleksi kultur murni laboratorium mikroalga BBPBAP Jepara. Pengamatan yang diukur meliputi kandungan total lipid C.vulgaris, pH, CO2, suhu, salinitas, alkalinitas dan DO. C.vulgaris dipanen hari ke - 9 pada fase eksponensial akhir, selanjutnya dilakukan penimbangan biomassa dan dianalisis total lipidnya. Hasil penelitian menunjukan bahwa injeksi CO2 berpengaruh nyata (p<0,05)terhadap kadar total lipid C.vulgaris. Kadar total lipid tertinggi dihasilkan perlakuan 6 menit sebesar 63,47 %
Uji Pendahuluan Aktivitas Produk Biotransformasi Daun Mangrove Avicennia marina Dengan Isolat Jamur Terhadap Bakteri Patogen Klebsiella pneumonia dan Enterobacter aerogenes Sabiladiyni, Humairah Arifia; Trianto, Agus; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (488.326 KB) | DOI: 10.14710/jmr.v7i4.25926

Abstract

ABSTRAK : Penyebaran bakteri patogen Klebsiella pneumonia dan Enterobacter aerogenes di Indonesia pada tahun 2013 diketahui mencapai 67,81%. Sumber antibiotik berasal dari bahan kimia juga dari alam, salah satunya berasal dari jenis mangrove A. marina yang mengandung senyawa flavonoid, steroid, fenol, dan tannin. Ekstrak daun A. marina kurang efektif sehingga perlu dilakukan proses biotransformasi dengan harapan akan terbentuk senyawa baru yang lebih berpotensi. Penelitian ini dilakukan untuk mengetahui apakah ekstrak jamur dapat menghambat pertumbuhan bakteri dan penambahan daun mangrove pada media jamur akan mengubah senyawa yang terkandung pada ekstrak daun mangrove. Sampel daun mangrove Avicennia marina diambil di Desa Tugurejo, Semarang dan isolat jamur yang digunakan adalah Fusarium incarnatum, isolat C12 dan C14. Bakteri patogen yang akan diuji adalah bakteri patogen Klebsiella pneumonia dan Enterobacter aerogenes. Kultur jamur dilakukan dengan menambahkan 200 gr dan 400 gr daun mangrove dalam 1000 ml air laut sebagai campuran media. Aktivitas antibakteri dengan menggunakan metode difusi agar. Ekstraksi daun mangrove dan jamur simbion dengan pelarut metanol. Hasil ekstraksi kemudian diuji aktivitas antibakteri dengan konsentrasi 250 μg/disk, 500 μg/disk, dan 1000 μg/disk. Deteksi kelas senyawa antibakteri menggunakan KLT. Visualisasi dengan sinar UV dan reagen vanillin asam sulfat. Ekstrak C14 dengan media daun mangrove 400 gr menunjukan zona hambat terbesar 12,3 mm pada konsentrasi 500 μg/disk terhadap bakteri Enterobacter aerogenes dan termasuk golongan kuat. Hasil KLT menunjukkan ekstrak jamur C14 memiliki kandungan yang hampir sama dengan ekstrak mangrove, tetapi setelah disemprotkan vanillin asam sulfat terdapat senyawa lain yang berbeda dari ekstrak daun mangrove. ABSTRACT : The emerge of pathogenic bacteria Klebsiella pneumonia and Enterobacter aerogenes in Indonesia are now reached 67,81% in 2013. One of the natural source is mangrove A. marina that contained bioactive compound such as flavonoid, steroid, fenol,and tannin. Mangrove leaves extract is often not effective, so biotransformation process is necessary to change the previous substrate become the new potential compound. The aims of this research to know whether fungal extract can inhibit the bacterial growth and the addition of mangrove leaves on fungal media will change a compound contained on mangrove leaves extract. Mangrove leaves are collected from Desa Tugurejo, Semarang and fungal isolation using Fusarium incarnatum, C12 and C14. K. pneumonia and E. aerogenes were the pathogenic bacteria assayed. The addition of mangrove leaves around 200 gr and 400 gr for fungi culture. Antibacterial activity by agar diffusion method. Extraction of mangrove leaves and fungal symbiont were attached with methanol solvent. Then, this crude extract were assayed for antibacterial activity by the consecutive extract concentrations of 250, 500, and 1000 μg/disk. Detection of class antibacterial compound was carried out using TLC method and visualization with UV light and vanillin sulfuric acid. The largest antibacterial activity in extract C14 about 12,3 mm with consentration 500 μg/disk that inhibits Enterobacter aerogenes and belong to strong group. The results of TLC showed that extract C14 have almost the same compound with mangrove leaves extract, but after sprayed with vanillin sulfuric acid, there are several compound which different with mangrove leaves extract.
Struktur Komunitas Makrobentos Polychaeta Di Ekosistem Mangrove Desa Bedono Kecamatan Sayung Kabupaten Demak Ni’amillah, Ni’amillah; Pribadi, Rudhi; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (252.757 KB) | DOI: 10.14710/jmr.v1i1.887

Abstract

Mangrove forest is a tropical coastal communities is dominated by several species of trees or characteristic shrubs that has the ability to grow in salty waters. The study aim was to describe structure community of Polychaeta Macrobenthos in the village of Bedono, district of Sayung, Demak Regency (06055’44”S - 110029’42”E) and has been conducted between April 2010 to September 2010. The area, due to its position in the northern coast of Java, has influence by Java Sea especially its long-shore current which in past decades has been changing due to the Semarang Port development. Effort has been made by OISCA, a Japan environmentally concerned NGO, to rehabilitate the area by planting mangrove even though the result is just still uncertain yet. This research was aimed to know the stucture of polychaeta macrobenthos communities Bedono Village, District Sayung, Demak Regency. This research used descriptive eksplorative method and while for the intake of sampel polychaeta conducted quantitative just taken that is only pursuant to volume unit. In this research, the location was divided into 4 stations, each with three replication of sampling transects. Intake sample conducted at fairish plot 1m x 1m with the deepness 10 cm. The result found 6 famili polychaeta : Nereidae, Amphiromidae, Eunicidae, Capitellidae, Arenicolidae, dan Acoetydae. There tedency that vegetation of mangrove progressively make abundance polychaeta very much.
Biomorfometri Kepiting Bakau di Perairan Bandengan Kendal Safitri, Shofi Firda; Sunaryo, Sunaryo; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3198.054 KB) | DOI: 10.14710/jmr.v9i1.25794

Abstract

 ABSTRAK: Kepiting Bakau (Scylla sp.) merupakan sumberdaya kelautan penting di Indonesia dan permintaan terhadap komoditi Kepiting Bakau cenderung meningkat, baik di pasar lokal maupun mancanegara. Peningkatan permintaan Kepiting Bakau dapat menyebabkan terganggunya populasi kepiting di alam. Penelitian ini bertujuan untuk mengkaji biomorfometrik Kepiting Bakau (Scylla sp.) yang meliputi ukuran lebar karapas Kepiting Bakau, hubungan lebar karapas dan berat, nisbah kelamin, faktor kondisi dan tingkat kematangan gonad Kepiting Bakau di perairan Bandengan Kendal pada November 2018 sampai Februari 2019. Penelitian menggunakan metode deskriptif eksploratif. Hasil penelitian menunjukkan, bahwa jumlah Kepiting Bakau yang diamati sebanyak 1914 ekor, terdiri atas 897 betina dan 1017 jantan, terdapat empat spesies Kepiting Bakau yang tertangkap di perairan Bandengan Kendal, yaitu Scylla serrata, Scylla tranquebarica, Scylla paramamosain dan Scylla olivacea, perbandingan betina dan jantan 1:1,19. Ukuran lebar karapas berkisar antara 43,75-165,5 mm dengan berat berkisar antara 23-660 g. Hubungan lebar karapas dengan berat bersifat allometrik negatif. Nilai faktor kondisi yang didapatkan berkisar 1,66–1,189. Tingkat kematangan gonad kepiting betina didominasi oleh TKG I dan II, pada bulan November 2018 – Februari 2019 di perairan Bandengan Kendal belum terjadi masa puncak pemijahan.  ABSTRACT: Mud crabs (Scylla sp.) are important marine resources in Indonesia and demand for mud crabs tends to increase, both in local and foreign markets. Increased demand for Mangrove Crabs can cause disruption to the population of crabs in nature. This study to examine the morphometrics of Mud Crabs (Scylla sp.) Which include the size of the width of the Mud Crab carapace, the relationship between carapace width and weight, sex ratio, condition factors and the level of maturity of the Mud Crab in Bandengan Kendal waters from November 2018 to February 2019. The descriptive explorative methods was used in this research. The results showed that the number of mud crabs caught from November 2018 to February 2019 was 1914, consisting of 897 females and 1017 males, there were four species of mud crabs caught in Kendal Bandengan waters, namely Scylla serrata, Scylla tranquebarica, Scylla paramamosain and Scylla olivacea, comparison of females and males 1: 1,19. Carapace widths range from 43.75 - 165.5 mm with weights ranging from 23 - 660 g. The relationship between carapace width and weight are negative allometric. The obtained condition factor values range from 1.66 - 1.189. The maturity level of female crab gonads are dominated by TKG I and II, thus it is suspected that in November 2018 - February 2019 in the waters of Bandengan Kendal, the spawning peak has not yet occurred.
Penambahan Berat, Panjang, dan Lebar dari Ukuran Benih yang Berbeda pada Budidaya Kepiting Soka di Desa Mojo Kabupaten Pemalang Muswantoro, Anggit Puji; Supriyantini, Endang; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.713 KB) | DOI: 10.14710/jmr.v1i1.1995

Abstract

Soka crabs is also called soft-shelled crabs. Soft shell in crab was not because of different type of crab, but it is due to the crab just molted. Events of molting is marked with the release of the old shells and formed newly shells. This molting process produces an increase in body size (Growth). The experiment was conducted in September-October 2011. The research was conducted at Soka crab aquaculture in Mojo village, Ulujami Sub-District, Pemalang District. The method used in this study was field research, by using design random complete with 4 treatment 10 times deut.. Test animals used were the mud crab (Scylla serrata), a total of 40 crabs with initial weight size of 70-110 grams. Test animals were grouped into 4 groups of of weight, which were A (of weight 70-80 grams), B (80.1 to 90 grams), C (90.1 to 100 g) and D (100.1 to 110 grams). Each group of size consisted of 10 crabs. Test containers used were plastic box with a density of 1 individual / box. The results showed that the difference in weight grouping gave results that were not significantly different (p> 0.05) for weight, length and width after molting. Differences in weight grouping also gave different FCR values that were not significantly different (p> 0,05). This was probably due to the grouping of weight used was still relatively narrow. Mangrove crab survival rate level for all groups of size showed an average value of 100% and water quality was quite good and decent for soft-shelled crabs aquaculture.
Pengaruh Pengasapan Dengan Divine Cigarette Terhadap Laju Pertumbuhan Kepiting Bakau (Scylla serrata Forsskål, 1775) Suryanto, Adi; Djunaedi, Ali; Sunaryo, Sunaryo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (179.868 KB) | DOI: 10.14710/jmr.v3i4.11419

Abstract

Salah satu komoditas perikanan yang telah lama dirintis budidayanya adalah Kepiting Bakau (Scylla serrata Forsskål, 1775) (Sulaeman, 2005). Produksi Kepiting Bakau selama ini secara keseluruhan masih mengandalkan tangkapan dari alam, sehingga perlu dikembangkan kegiatan budidaya. Salah satu permasalahan yang ada di dalam kegiatan budidaya adalah  terhambatnya pertumbuhan Kepiting Bakau yang disebabkan oleh terganggunya proses metabolisme karena adanya kandungan zat radikal bebas (merkuri). Radikal bebas dapat dihilangkan dengan menggunakan Divine cigarette. Divine cigarette dapat menangkap radikal bebas. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pengasapan Divine cigarette pada pakan terhadap laju pertumbuhan Kepiting Bakau (S. serrata Forsskål, 1775). Penelitian ini menggunakan metode eksperimental dengan aspek yang diteliti adalah perbedaan pertumbuhan antara Kepiting yang diberi perlakuan pengasapan Divine cigarette pada pakan dan Kepiting yang tidak diberi perlakuan pengasapan Divine cigarette  pada pakan. Hasil penelitian menunjukkan adanya perbedaan yang nyata diantara kedua perlakuan (p < 0,05) pada pertumbuhan Kepiting Bakau (S. serrata Forsskål, 1775). Laju pertumbuhan spesifik (LPS) perlakuan A sebesar 0,77 + 0,06 % per hari dan perlakuan B sebesar 0,56 + 0,04 % per hari. Laju pertumbuhan spesifik Kepiting Bakau (S. serrata Forsskål, 1775) pada perlakuan A lebih tinggi, diduga akibat pengaruh pengasapan Divine cigarette pada pakan
Sistem Budidaya Rumput Laut Gracilaria verrucosa di Pertambakan dengan Perbedaan Waktu Perendaman di Dalam Larutan NPK Rukmi, Ayuning Smita; Sunaryo, Sunaryo; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.243 KB) | DOI: 10.14710/jmr.v1i1.892

Abstract

Seaweed, Gracilaria verrucosa, is a plant that could be live in the brackishwater pond also requires nutrients in sufficient quantities and balanced in order to achieve optimal production. Therefore, fertilizer treatment on this commodity is very necessary for increasing production. This study was designed by Completely Randomized Design (CRD) with immersion period treatment the G. verrucosa of the NPK solution. The treatments, namely used: A. Control, B. 10 minutes, C. 20 minutes, D. 30 minutes, E. 40 minutes, F. 50 minutes, G. 60 minutes immersion. This study used N organic total (nitrite, nitrate and ammonium) that was obtained from NPK fertilizer with concentration of 0,6 mg/L. Planting was done by using longline method of 72 ties and was reared for 35 days. The results showed that there was significant effect of NPK immersion time on the growth rate of G. verrucosa (p<0,01). The highest average of specific growth rate of G. verrucosa in the treatment G, which was 2,13% per day and average of specific growth rate G. verrucosa lowest in treatment A, which was 1,67% per day.
Komposisi dan Kelimpahan Fitoplankton di Perairan Pandansari, Desa Kaliwlingi, Kabupaten Brebes, Jawa Tengah Aminah, Siti; Nuraini, Ria Azizah Tri; Djunaedi, Ali
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (778.062 KB) | DOI: 10.14710/jmr.v9i1.25793

Abstract

ABSTRAK : Fitoplankton merupakan dasar dari rantai makanan (primary producer) di perairan. Fitoplankton juga memiliki fungsi lain yaitu sebagai  bioindikator untuk mengevaluasi kualitas dan tingkat kesuburan perairan. Keberadaan fitoplankton sangat penting karena mendukung seluruh kehidupan biota laut lainya. Tujuan penelitian ini adalah untuk mengetahui struktur komunitas fitoplankton dan kualitas perairan di sekitar ekowisata “Dewi Mangrove sari” berdasarkan kelimpahan dan keanekargaman fitoplankton. Penelitian ini di laksanakan pada tanggal 26 Juni 2018 dan 7 November 2018. Penelitian ini dilakukan di  sekitar ekowisata mangrove “Dewi Mangrove Sari” Pandansari, Desa Kaliwlingi, Kabupaten Brebes, Jawa Tengah,  dengan 3 stasiun dan 3 pengulangan pengambilan sampel.Metode yang digunakan dalam penelitian ini adalah metode deskriptif, sedangkan dalam penentuan titik lokasi pengambilan sampel fitoplankton menggunakan metode purposive sampling. Hasil dari penelitian ini ditemukan 4 dari 22 genus yaitu,  Bacillariophycea dengan 15 genus,  Dynophyceae dengan 5 genus, Cyanophyceae dengan1 genus dan Crysophyceae ditemukan 1 genus. kelimpahan fitoplankton sebesar 42.555,67 Ind/L pada Bulan Juni 2018 dan 44.072,17 Ind/L untuk bulan November termasuk dalam kondisi kesuburan tinggi (Eutrofik). Indeks keanekaragaman (H’) berkisar antara 1,91 - 2,57, indeks keseragaman (e) berkisar antara 0,65-0,84, indeks dominasi (C) berkisar antara 0,13 – 0,18. Dapat disimpulkan  bahwa indeks keanekaragaman di perairan sekitar ekowisata “Dewi Mangrove Sari” Pandansari, Desa kaliwlingi, Kabupaten Brebes, Jawa tengah termasuk dalam kategori tinggi dan tidak ada dominasi. Perairan sekitar ekowisata “Dewi Mangrove Sari” cukup stabil dan persebaran individu pada setiap genus cukup merata dan tidak ada jenis yang mendominasi. ABSTRACT: Phytoplankton are the basis of the food chain (primary producer) in water. Phytoplankton also has another function, namely as a bio-indicator to evaluate the quality and level of water fertility. The existence of phytoplankton is very important because it supports all other marine life. The purpose of this study was to determine the structure of the phytoplankton community and the quality of the waters around the ecotourism "Dewi Mangrove sari" based on the abundance and diversity of phytoplankton. This research was carried out on 26 June 2018 and 7 November 2018. The research was conducted around the Pandansari "Dewi Mangrove Sari" mangrove ecotourism, Kaliwlingi Village, Brebes Regency, Central Java, with 3 stations and 3 sampling repeats. The method used in this research is descriptive, while in determining the location of phytoplankton sampling locations using a purposive sampling method. The results of this study found 4 out of 22 genera namely, Bacillariophycea with 15 genera, Dynophyceae with 5 genera, Cyanophyceae with 1 genus and Crysophyceae found 1 genus. Phytoplankton abundance of 42,555.67 Ind / L in June 2018 and 44,072.17 Ind / L for November included in conditions of high fertility (Eutrophic). Diversity index (H ') ranged from 1.91 to 2.57, uniformity index (e) ranged from 0.65 to 0.84, dominance index (C) ranged from 0.13 to 0.18. It can be concluded that the diversity index in the waters around Pandansari's "Dewi Mangrove Sari" ecotourism, Kaliwlingi Village, Brebes Regency, Central Java is included in the high category and there is no dominance. The waters around the ecotourism "Dewi Mangrove Sari" are quite stable and the distribution of individuals in each genus is quite evenly distributed and no species dominates. 
Korelasi antara Kelimpahan Kepiting dengan Kerapatan Mangrove di Desa Bedono Kecamatan Sayung Kabupaten Demak Jawa Tengah Ristiyanto, Ardi; Djunaedi, Ali; Suryono, Chrisna Adhi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.617 KB) | DOI: 10.14710/jmr.v8i3.24573

Abstract

ABSTRAK : Hutan mangrove memiliki fungsi ekologis sebagai tempat pemijahan (spawning ground), asuhan (nursery ground), dan mencari makan (feeding ground). Tujuan dalam penelitian ini yaitu untuk mengetahui korelasi antara kelimpahan kepiting dengan kerapatan mangrove di ekosistem mangrove Desa Bedono, Kecamatan Sayung, Kabupaten Demak. Penelitian ini bersifat deskriptif eksploratif dengan pengambilan sampel menggunakan metode kualitatif dan penentuan lokasi sampling menggunakan purposive sampling method. Lokasi penelitian dibagi menjadi tiga stasiun yaitu A (Mangrove dekat muara), B (Tracking mangrove), C (Mangrove dekat Tambak). Sampel diambil dari plot sampling 5 m x 5 m dengan tiga kali pengulangan dan tiga waktu pengulangan di setiap stasiunnya. Hasil penelitian ini ditemukan 7 jenis kepiting yang termasuk ke dalam 4 famili, diantaranya adalah Ocypodidae (Uca vocans dan Uca coarctata), Grapsidae (Metoporgapsus latifrons dan Episesarma lafondi), Varunidae (Metaplax elegans dan Pseudograpsus albus) dan Sesarmidae (Parasesarma rutilimanum). Korelasi antara kelimpahan kepiting dengan kerapatan mangrove menunjukkan bahwa semakin tinggi nilai kerapatan mangrove maka semakin tinggi juga nilai kelimpahan kepiting. Nilai kelimpahan kepiting tertinggi terdapat di stasiun A (27633 ind/ha) dan kelimpahan terendah terdapat pada stasiun B (3833 ind/ha). ABSTRACT : Mangrove forests have ecological functions as a spawning ground, nursery ground, and feeding ground. The purpose of this study is to determine the correlation of an abundance of crabs with the density of mangroves in the mangrove ecosystems of Bedono Village, Sayung District, Demak Regency. This research was descriptive explorative with sampling using qualitative methods and determining sampling locations using a purposive sampling method. The research location is divided into three stations, namely A (Mangrove near the estuary), B (Tracking mangrove), C (Mangrove near the Pond). Samples were taken from a sampling plot of 5 m x 5 m with three repetitions and three repetitions of each station. The results of this study found 7 types of crabs belonging to 4 families, including Ocypodidae (Uca vocans and Uca coarctata), Grapsidae (Metoporgapsus latifrons and Episesarma lafondi), Varunidae (Metaplax elegans and Pseudograpsus albus) and Sesarmidae (Parasesarma rutilimanum). The correlation of the abundance of crabs with mangrove density shows that the higher the value of mangrove density, the higher the abundance of crabs. The highest value of crab abundance was found in station A (27633 ind/ha) and the lowest abundance was found at station B (3833 ind/ha).
Co-Authors A. Santoso Adi Santoso ADI SANTOSO Adi Suryanto Adi Suryanto Agung Sudaryono Agus Sabdono Agus Trianto Ali Ridlo Ambariyanto Ambariyanto Amelia, Aninda Putri Anggelina, Amelia Cahya Anggit Puji Muswantoro Apriliani, Seka Indah Ayu Permana Sari Ayuning Smita Rukmi Bagus Pitra Aditya Bagus Pitra Aditya Bambang Sulardiono Bambang Yulianto Br Ginting, Feny Amelia Chrisna Adhi Suryono Delianis Pringgenies Delianis Pringgenies Dyah Rahmawati Endang Supriyantini Endarwantti, Vionita Ervia Yudiati Farizan Adiya Pratama, Farizan Adiya Fauzi Anwar Gunawan Widi Santosa Irwani Irwani Ivend Umbu Jawa Ivend Umbu Jawa, Ivend Umbu Jauharul Fadli Kharisma Firdaus Linggarjati Lestari, Raisha Fahmida Dwi Ni’amillah Ni’amillah Norma Afiati Nur Taufiq S.P.J. Panatar, Jakfar Shodiq Putri, Cinthya Ruhanto Raden Ario Rafsanjani, Muhammad Eka Darmawan Reza Hafiz Pranajaya Ria Azizah Tri Nuraini Richardus Mahatmada Indrajati Ristiyanto, Ardi Rizqina, Cahya Rudhi Pribadi Sabiladiyni, Humairah Arifia Safitri, Shofi Firda Sarjito - Sarjito . Setyati , Wilis Ari Shafiya, Radila Widya Siti Aminah Sri Redjeki Subagiyo Subagiyo Subagyo Subagyo Sunaryo Sunaryo Sunaryo Sunaryo Turnip, Sarah Pebriyani Ulfah Rahmayani W. Widiatmoko Wibowo, Ichsan Suryo Zaenal Arifin