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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
Earth & Planetary Sciences
The Journal of Tropical Fisheries Management is managed by the Department of Water Resource Management, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University aims to publish the results of basic, applied research in the scope of fisheries resources, fish stock studies, and population dynamics, fish biodiversity, fisheries technology, industrialization and fish trade, fisheries management, and fisheries development policies in the tropics, especially Indonesia. The scope of the area includes: Marine Fisheries Coastal Fisheries Inland Fisheries The focus and scope of this publication are expected to contribute thoughts for the government to strengthen the science of fisheries management
Arjuna Subject : -
Articles 825 Documents
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Studi kesesuaian perairan pantai tanjung setia sebagai kawasan wisata bahari kabupaten lampung barat Provinsi lampung Aziz, Zulkifli; Subardjo, Petrus; Pratikto, Ibnu
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (118.719 KB) | DOI: 10.14710/jmr.v1i2.2029

Abstract

Faithful Cape Coast is one of Lampung destinations featured attraction and a tourist attraction in West Lampung regency which has considerable potential as a marine tourism area. This study aims to identify and assess physical potential of Cape Coast Faithful as marine tourism area. This study aims to identify and assess physical potential of Cape Coast Faithful as marine tourism area. The results of the study showed that the physical condition of the waters of Cape Coast Faithful potential as marine tourism area, with some activity that is surfing (Surfing), diving (Diving), and fishing (Fishing). Based on the IKW for surfing activities (Surfing) into the category of class S1 (very suitable) with IKW value by 80%, whereas for diving (Diving) and fishing (Fishing) in the category S2 (quite appropriate) with each IKW value of 70% for diving (Diving), and 64% for fishing activities (fishing).
KANDUNGAN LOGAM BERAT CD PADA AIR, SEDIMEN DAN DAGING KERANG HIJAU (Perna viridis) DI PERAIRAN TANJUNG MAS SEMARANG UTARA Purba, Christtenson; Ridlo, Ali; Suprijanto, Jusup
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.34 KB) | DOI: 10.14710/jmr.v3i3.6000

Abstract

Tingginya aktifitas di sepanjang daerah perairan Tanjung Mas diduga mengalirkan berbagai limbah yang dapat menimbulkan pencemaran. Salah satu bentuk pencemaran tersebut adalah buangan limbah logam berat Cd. Penelitian ini bertujuan untuk menganalisis kandungan logam berat Cd dalam air, sedimen dan daging P. viridis dan mengetahui sebaran ukuran cangkang P. viridis. Penelitian ini dilakukan pada bulan November-Desember 2013 di tiga wilayah perairan Tanjung Mas yaitu muara, tambak dan pelabuhan. Metode yang digunakan dalam penelitian ini adalah metode deskriptif sedangkan penentuan lokasi pengambilan sampel dilakukan dengan metode Purposive Sampling. Analisa logam berat menggunakan AAS (Atomic Absorbtion Spectrophotometry). Hasil penelitian menunjukan bahwa kandungan logam berat Cd dalam air berkisar  <0,001-0,004  mg/l, sedimen 2,382-7,121 mg/kg, dan P.viridis <0,01 mg/kg. Hasil ini berarti bahwa air dan daging P. viridis di Perairan Tanjung Mas masih sesuai dengan baku mutu KMLH No 51 2004 dan SNI 7387.2009 sedangkan pada sedimen telah tercemar ringan oleh logam berat Cd. Sebaran ukuran panjang cangkang yang paling mendominasi yaitu P. viridis dengan ukuran 37,26-47,25 mm
Kandungan Logam Berat Besi (Fe) Dalam Air, Sedimen Dan Kerang Hijau (Perna viridis) Di Perairan Trimulyo, Semarang Murraya, Murraya; Taufiq-Spj, Nur; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (536.826 KB) | DOI: 10.14710/jmr.v7i2.25902

Abstract

ABSTRAK : Perairan Trimulyo merupakan salah satu perairan di kota Semarang yang menjadi tempat pembuangan limbah domestik maupun limbah industri dan banyak ditemukan kerang hijau yang masih dikonsumsi. Tujuan dari penelitian ini yaitu untuk mengetahui kandungan logam berat besi (Fe) pada air, sedimen dan kerang hijau (P.viridis) dan mengetahui tingkat pencemaran logam besi (Fe) di Perairan Trimulyo, Semarang. Penelitian ini dilaksanakan pada tanggal 11 Januari 2016 hingga 15 Maret 2016 dengan metode studi kasus. Logam  berat  Fe  dalam  sampel  air, sedimen  dan  kerang  hijau  dianalisis  di  Balai  Besar  Teknologi  Pencegahan Pencemaran  Industri  (BTPPI)  Semarang  dengan  menggunakan  alat  AAS (Atomic Absorption  Spectrophotometry). Konsentrasi logam berat Fe di perairan Trimulyo memiliki nilai yang tidak terdeteksi di setiap stasiun yaitu <0,001 mg/L. Kandungan logam berat Fe pada sedimen berkisar antara 1,96-3,30 mg/kg dan kandungan logam berat Fe pada kerang hijau (P. viridis) berkisar antara 150,93-153,64 mg/kg.  Kandungan logam Fe di perairan belum melewati ambang batas baku mutu menurut Peraturan Pemerintah No. 82 tahun 2001, sedangkan sedimen belum melebihi batas batas baku mutu menurut Wisconsin Department of Natural Resources tahun 2003 dan pada kerang hijau (P. viridis) telah melebihi baku mutu menurut Badan Standarisasi Nasional (BSN) tahun 2009: Standar Nasional Indonesia (SNI) No. 7387 tentang maksimal cemaran logam berat dalam pangan. ABSTRACT : Trimulyo waters is one of the waters in Semarang that becoming domestic and industrial waste sewage and many of green mussels are found and still consumed. The purpose of this study is to determine the content of iron (Fe) in water, sediment and green mussel (P. viridis) and to find out its polution level Trimulyo waters, Semarang. This study was conducted on January 11, 2016 to March 15, 2016 using case study method. Iron (Fe) found in sample of water, sediments and mussels were analyzed in Balai Besar Teknologi Pencegahan Pencemaran Industri (BTPPI) Semarang using AAS method (Atomic Absorption Spectrophotometry). Concentration of iron (Fe) in Trimulyo waters has an undetected value on each stations, which is <0.001 mg/L. While in sediment varies from 1.96 to 3.30 mg/kg and 150.93 to 153.64 mg/kg in green mussel (P. viridis). Waters quality in the water column and sediment have not exceed the limit of quality standard according to Peraturan Pemerintah No. 82 tahun 2001 and the 2003 Wisconsin Department of Natural Resources respectively, while green mussel (P. viridis) has passed the quality standard by Badan Standarisasi Nasional (BSN) tahun 2009: Standar Nasional Indonesia (SNI) No. 7387 about the maximum contamination amount of heavy metals in food.
Studi Kandungan Bahan Organik Dan Mineral (N, P, K, Fe dan Mg) Sedimen Di Kawasan Mangrove Desa Bedono, Kecamatan Sayung, Kabupaten Demak Nugroho, Radich Arief; Widada, Sugeng; Pribadi, Rudhi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.403 KB) | DOI: 10.14710/jmr.v2i1.2057

Abstract

Mangroves in Bedono Village, District Sayung, Demak Regency considered as degraded mainly due to land conversion and reclamation which lead to coastal erosion and permanent flooding. This mangroves condition, in conjuction with the exsistance of several estuaries believes in some part controlled sedimentation and related process in the area including sediment particle size, organic and mineral (N, P, K,Fe and Mg) distribution. The study was aimed to determine distribution of organic and mineral (N, P, K,Fe and Mg) of mangrove sediment in Bedono Village, District Sayung, Demak Regency, and conducted between May-July 2010. A purposive sampling base descriptive method was applied for this study, and sediment samples were analysed at Geological Laboratory (Marine Science Department) Faculty of Fisheries and Marine Sciences and Chemical Analytical Laboratory (Chemical Department), Faculty of Science and Mathematics, Diponegoro University. The result showed that sediment organic content of Tunjung Sari (15,42%) and Gonjol (16,46%) were slightly higer than in Sayung (12,48%) and Soban (12,06%), N content in Tunjung Sari (0,46%) and Soban (0,43%) much higher than in Gonjol (0,27%) and Sayung (0,29%), while P content in Gonjol (354,73 mg/kg) was the highest followed by Tunjung Sari (245,60 mg/kg) and Sayung (203,43 mg/kg) and the lowest was in Soban (80,42 mg/kg). The rate of sediment K content, similar to N content, was high in Tunjung Sari (0,50%) and Soban (0,54%) and lower in Gonjol (0,39%) and Sayung (0,35%). Fe content was higher in Gonjol (5,52 %) than in Tunjung Sari (3,93 %), Sayung (2,55 %) and Soban (3,92 %), meanwhile Mg content was higher in Tunjung Sari (0,125 %) than Gonjol (0,075 %), Sayung (0,080 %) and Soban (0,006 %).
Kandungan Logam Berat Timbal (Pb) Pada Air, Sedimen, Dan Kerang Hijau (Perna Viridis) Di Perairan Tanjung Emas Semarang Sijabat, Emilia; Trinuraini, Ria Azizah; Supriyantini, Endang
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (250.852 KB) | DOI: 10.14710/jmr.v3i4.11397

Abstract

Penelitian ini bertujuan untuk menganalisis kandungan dan tingkat pencemaran logam berat Pb pada air, sedimen, dan kerang hijau (Perna viridis) di perairan Tanjung Emas Semarang. Penelitian ini dilaksanakan pada tanggal 7 November dan 7 Desember 2013 dengan metode penelitian deskriptif.  Sampel air, sedimen dan kerang hijau dianalisis di Laboratorium menggunakan alat AAS (Atomic Absorption Spectrophotometry). Hasil penelitian kandungan logam berat Pb di setiap titik stasiun menunjukkan pola akumulasi yang sama pada air. Kandungan logam berat Pb pada sedimen dan kerang hijau (Perna viridis) menunjukkan nilai yang bervariasi, terkait dengan sifat dari logam berat yang cenderung mengendap dan terakumulasi dalam organisme. Meskipun demikian variasi faktor lingkungan seperti suhu, salinitas, pH, kecepatan arus dan jenis sedimen juga memberikan kontribusi yang cukup penting. Kandungan Logam berat Pb pada Kerang Hijau (Perna viridis) telah melampaui batas yang diperbolehkan
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. 
Pengaruh Suhu Ekstraksi Terhadap Kualitas Alginat Rumput Laut Turbinaria sp. dari Pantai Krakal, Gunung Kidul-Yogyakarta Wibowo, Arvianto; Ridlo, Ali; Sedjati, Sri
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.865 KB) | DOI: 10.14710/jmr.v2i3.3127

Abstract

Turbinaria sp. is a type of brown algae that produce alginate. Alginate is widely used in industry, such as for a coagulant, suspending, stabilizers, film formers, gel formation, and emulsifier. The objective of research was to know the effect of temperature exstraction toward quality of alginate such as yield, water content, ashes content, and viscosity of Turbinaria sp. Sampling of Turbinaria sp. was done in Krakal Beach Gunung Kidul, Yogyakarta. The method used was experimental method. Design experiment applied was Complete Randomized Design (CRD) with Na2CO3 7 % by different Temperature treatment from 40 ºC 50 ºC, 60 ºC, 70 ºC, and 80 ºC of concentration triplicate toward alginate quality. The results showed that the higher temperature exstraction caused higher yield, and lower water content, ashes content, and viscosity. The result showed the highest yield was obtained at temperature 80 ºC (27,96 ± 0,34 %). The lowest water content was obtained at temperature 80 ºC (15,92 ± 0,63 %). The lowest ashes content was obtained at temperature 80 ºC (23,28 ± 2,51 %). The highest viscosity content was obtained at temperature 40 ºC (26,81 ± 1,20 cPs). Treatment temperature 50 ºC produce temperature best if seen from the odor of which set standard.
Estimasi Simpanan Karbon Pada Ekosistem Mangrove Di Desa Pasar Banggi Dan Tireman, Kecamatan Rembang Kabupaten Rembang Mardliyah, Riani; Ario, Raden; Pribadi, Rudhi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.117 KB) | DOI: 10.14710/jmr.v8i1.24330

Abstract

Ekosistem mangrove memiliki fungsi ekologis sebagai penyerap dan penyimpan karbon. Mangrove menyerap CO2 pada saat proses fotosintesis, kemudian mengubahnya menjadi karbohidrat dengan menyimpannya dalam bentuk biomasa. Tujuan penelitian untuk mengestimasi simpanan karbon pada tegakan dan substrat mangrove yang berada di Desa Pasar Banggi dan Desa Tireman, Kabupaten Rembang. Pengambilan sampel dilakukan pada bulan Juni - Juli 2018. Metode yang digunakan yaitu purposive sampling method dan eksploratif, dengan dasar pertimbangan berupa jenis, kerapatan serta diameter pohon mangrove. Pengambilan sampel dilakukan di tiga stasiun dengan kondisi rapat, sedang dan jarang. Setiap stasiun penelitian dibagi menjadi tiga plot penelitian, pengukuran diameter pohon dilakukan pada transek ukuran 10 x 10 m, diameter yang di ukur pada setiap plot yaitu hanya kategori pohon (diameter ≥ 5 cm). Berdasarkan hasil penelitian, didapat bahwa simpanan karbon pada tegakan mangrove di Desa Pasar Banggi sebesar 9.620,451 ton/ha, dan Desa Tireman sebesar 4.633,618 ton/ha, sedangkan estimasi simpanan karbon pada substrat mangrove di Desa Pasar Banggi sebesar 920,982 ton/ha dan Desa Tireman sebesar 471,929 ton/ha. Mangrove ecosystems have ecological functions as carbon sinks and stores. Mangroves absorb CO2 during photosynthesis, then convert it to carbohydrates by storing it in the form of biomass in the body parts of mangrove plants. Research on the estimation of carbon stocks is very necessary to support the improvement of world climate. The sampling was conducted on June 2018 until July 2018. This research used  purposive sampling and explorative method, with the consideration of the type, density and diameter of mangrove trees. Conducted in three stations with varying in the mangrove ecosystem conditions. Each research station was divided into three research plots, tree diameter measurements were carried out on 10 x 10 m transects, the diameter measured in each plot was only trees (≥ 5 cm diameter). The result of this research, it is found that carbon storage in mangrove stands Pasar Banggi Village is 9,620,451 ton/ha, and Tireman Village is 4,633,618 ton/ha. While  estimated carbon storage the mangrove substrate in Pasar Banggi Village is 920,982 ton/ha and Tireman Village is 471,929 ton/ha. These result that estimates carbon storages in mangrove stands are greater than estimates of carbon storage on mangrove substrate. The estimation of carbon storage in the mangrove stands increases with increasing of plant biomass and mangrove density, while estimates of carbon storage on the substrate are tsuspected to be more influenced by organic matterial and the location reseach. 
Studi Kelimpahan Gastropoda di Bagian Timur Perairan Semarang Periode Maret – April 2012 Budi, Dinar Ayu; Suryono, Chrisna Adhi; Ario, Raden
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.745 KB) | DOI: 10.14710/jmr.v2i4.3684

Abstract

Coastal environment in Eastern part of Semarang is an area that changed in ecological conditions caused by the influence of a variety of human activities such as ports activity, industries, fishing activity, and common people’s residence which causes a decrease in water quality that directly affect the presence, and abundance of gastropods in that area. Purpose of this study is to find out the abundance of gastropods in coastal water environment, Eastern part of Semarang, during periods March to April 2012. This study using the descriptive method, sample survey method, and method used in determining station is purposive sampling method. Sample collected are including water quality measurement, sediments, and samples of biota that is gastropods. Sample of gastropods taken by using the dredge, by width 138cm, height 137cm, and net 500 cm long. Samples of gastropods founded then identified in Marine Biological Laboratory, Marine Faculty, Diponegoro University. Water quality measurement including physical factors, are : depth, water brightness, temperature, substrate, and chemical factors, they are : salinity, acidity (pH), dissolved oxygen (DO), and organic content. There are 14 spesies founded, they are : Architectonica perdix, Busycon canaliculatum, Conus tenuistriatus, Engina zonalis, Fasciolaria salma, Murex trapa, Nassarius javanus, N. pullus, Natica lineata, N. tigrina, Pseudoeptunea varicose, Terebralia palustris, Trigonostoma scalariformis, and Turricula javana. Highest abundance is on station II (183,67), and the lowest abundance is station VII (2,67).
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).

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