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Journal of Marine Research
Published by Universitas Diponegoro
ISSN : -     EISSN : 24077690     DOI : 10.14710/jmr.v9i4.28340
Core Subject : Science,
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
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Articles 687 Documents
Geomorfologi Perairan Muara Sungai Kaliboyo Batang Jawa Tengah Shofian, Tyandi; Atmodjo, Warsito; Marwoto, Jarot
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (971.338 KB) | DOI: 10.14710/jmr.v8i4.25412

Abstract

ABSTRAK : Sungai Kaliboyo merupakan salah satu daerah aliran sungai (DAS) yang ada di Kabupaten Batang. Muara Sungai Kaliboyo terletak di Desa Roban, dimana mayoritas masyarakat memanfaatkan sebagai sarana transportasi dan sumber mata pencaharian. Perairan yang dulu digunakan sebagai jalur transportasi kini mengalami perubahan berupa pendangkalan pada aliran muara, sehingga berdampak pada terhambatnya aktivitas nelayan khususnya alur keluar masuk kapal. Informasi geomorfologi ialah hal vital untuk perencanaan dan pemanfaatan perairan di masa mendatang salah satunya pengerukan. Tujuan dari penelitian ini untuk mengetahui kondisi geomorfologi perairan Muara Sungai Kaliboyo, Kabupaten Batang. Penelitian ini dilakukan dengan pemeruman kedalaman menggunakan instrumen singlebeam echosounder tipe Garmin GPSMap 585 untuk mengetahui kedalaman perairan, serta grab sampler untuk mengambil sampel sedimen dasar. Pengolahan data diproses dengan menggunakan software ArcGIS 10.4 dan Surfer 11 untuk mendapatkan hasil kontur batimetri dan persebaran sedimen guna mengetahui kondisi geomorfologi. Berdasarkan hasil penelitian, menunjukkan bahwa muara sungai terjadi pendangkalan hingga kedalaman 0,5 m. Kemiringan perairan berkisar 0,47% hingga 1,95% yang dikategorikan datar. Kondisi geomorfologi berupa pantai berpasir dengan didominasi gelombang dan debit sungai. ABSTRACT : Kaliboyo River is one of the river basins (DAS) in Batang Regency. The Kaliboyo River Estuary is located in Roban Village, where the majority of the civilization uses it as transportation route and a source of livelihood. The waters that used to be used as a transportation route are now undergoing changes in the form of siltation in the estuary flow, so that it has an impact on the inhibition of fishing activities, especially the shipping channel, in and out of ships. Geomorphological information is important for the planning and utilization of water in the future, one of which is dredging. The purpose of this study was to determine the geomorphological conditions of the Kaliboyo Estuary waters, Batang Regency. This research was conducted by depth analysis using a Garmin GPSMap 585 singlebeam echosounder instrument to determine the depth of the waters, as well as a grab sampler to take basic sediment samples. Data processing was processed using ArcGIS 10.4 and Surfer 11 software to obtain the results of bathymetry contours and sediment distribution to determine geomorphological conditions. Based on the results of the study, it shows that river mouths shallow to a depth of 0.5 m. The water slope ranges from 0.47% to 1.95% which is categorized flat. Geomorphological conditions is sandy beaches dominated by waves and river discharge.
Evaluasi Kesesuaian Tambak Garam Ditinjau Dari Aspek Fisik Di Kecamatan Juwana Kabupaten Pati Renaldi Bahri Tambunan; Hariyadi Hariyadi; Adi Santoso
Journal of Marine Research Vol 1, No 2 (2012): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.972 KB) | DOI: 10.14710/jmr.v1i2.2036

Abstract

Salt is one of the national strategic commodities in the field of marine. Effort to increase the quantity and quality of salt production has not been a priority for farmers in Juwana. It examined regarding evaluated the suitability of the physical land of salt embankment in Pati Juwana to approach some of the factors are soil permeability, climatology, soil type and topography of the form. The purpose of this research is to know and study the suitability of the salt level land embankment in district Juwana, Pati. This research using several physical analysis of the permeability of soil, land forms and types, climatic conditions and scoring physical suitable of salt embankment. The results of this study indicate that the suitability of physical salt embankment in Juwana, Pati has a physical suitability class is very suitable (S1) to produce a national salt.
Korelasi Kandungan Nitrat Dan Fosfat Dalam Air Dan Sedimen Dengan Kerapatan Lamun Yang Berbeda Di Perairan Teluk Awur, Jepara Widiyanti, Victoria Ratna; Sedjati, Sri; Nuraini, Ria Azizah Tri
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (433.534 KB) | DOI: 10.14710/jmr.v7i3.25909

Abstract

ABSTRAK : Lamun merupakan satu-satunya tumbuhan berbunga yang ada di lingkungan laut. Ketersediaan nutrien di lingkungan mempengaruhi pertumbuhan lamun. Nitrat dan fosfat berfungsi sebagai nutrien untuk melangsungkan fotosintesis. Selain masukan dari daratan, nitrat dan fosfat di padang lamun juga berasal dari hasil dekomposisi tumbuhan lamun yang telah mati. Oleh karena itu perlu adanya penelitian mengenai  kandungan nitrat dan fosfat di perairan pada kerapatan lamun yang berbeda. Tujuan penelitian ini adalah mengetahui korelasi dan kandungan nitrat dan fosfat dalam air dan sedimen di padang lamun perairan Teluk Awur, Jepara pada kerapatan lamun yang berbeda. Penelitian ini menggunakan metode deskriptif eksploratif dan korelasional, sedangkan metode penentuan lokasi menggunakan metode purposive sampling. Materi yang digunakan dalam penelitian ini adalah sampel air, sedimen, dan kerapatan lamun. Penelitian dilaksanakan pada bulan Oktober – November 2015. Analisis sampel penelitian dilakukan di Laboratorium Teknik Lingkungan Fakultas Teknik, Universitas Diponegoro. Hasil penelitian yang diperoleh adalah kandungan nitrat dalam air 2,487-2,711 mg/L, nitrat dalam sedimen sebesar 6,393-7,288 mg/L, fosfat dalam air sebesar 0,008-0,012 mg/L, dan fosfat dalam sedimen sebesar 3,403-4,171 mg/L. Perairan Teluk Awur, Jepara tergolong kurang subur. Analisis korelasi kandungan nitrat dalam air, nitrat dalam sedimen, fosfat dalam air dan fosfat dalam sedimen dengan kerapatan lamun memiliki nilai korelasi (r) sebesar -0,526; 0,242; 0,110 dan 0,101. Hubungan kandungan nitrat dan fosfat dalam air, dan sedimen  menunjukkan hubungan yang rendah. ABSTRACT : Seagrass is the only flower plant in marine environment. Nutrient availability in environment affects the growth of sea grass. Nitrate and phosphate have a role as the nutrient supplier/source for photosynthesis. Besides input from the land, nitrate and phosphate in seagrass field also come from the result of decomposition of dead seagrass. Therefore, a research about nitrate and phosphate content in water at different seagrass density should be conducted.The purpose of this research was to known correlation and  content of nitrate and phosphate in water and sediment of seagrass bed in Teluk Awur waters, Jepara at different seagrass density. This research used a descriptive explorative method and correlational method, while the method for location decision was using purposive sampling method. The materials used in this research were water, sediment, and seagrass density. This research was conducted in October until November 2015. The sample analysis  for this research was done in laboratory of environment technique of Technique Faculty, Diponegoro University. The results obtained from this research showed that nitrate content in water was 2.487-2.711 mg/L, nitrate content in sediment was 6.393-7.288 mg/L, phosphate content in water was 0.008-0.012 mg/L, and phosphate content in sediment was 3.403-4.171 mg/L. The seagrass abundance of Teluk Awur waters, Jepara was categorized to low abundance rate. The analysis of correlation among nitrate and phosphate in water and sediment towards seagrass density pointed correlation value (r) as follows: -0.526; 0.242; 0.110 and 0.101. The relationship between nitrate and phosphate in water and in sediment with the density was estimated  weak relations.
Komposisi dan Kelimpahan Makrozoobenthos Polychaeta di Pantai Maron dan Sungai Tapak Kel. Tugurejo Kec. Tugu Kota semarang Mahfud, Mahfud; Widianingsih, Widianingsih; Hartati, Retno
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (105.499 KB) | DOI: 10.14710/jmr.v2i1.2066

Abstract

Mangrove area in Tugu District had been damaged because of function change as fishpond and agriculture. It because of fisherman shiplane, abaration and waste. Bad management area can change the invorenment and can be influence the ecosystem. As a concequence to the biota in that ecosystem include Polychaeta. The aim of research was finding out Compositions and Abundance of Macrozoobenthos Polychaeta in Maron Beach and Tapak River Tugurejo village Tugu District Semarang City. This research used descriptive exploratory method, determination of research area using purposive sampling method. Samples handling soaked in formalin 10% with rose Bengal. The result showed that it had been found 30 species include on 26 Polychaeta and 4 other worm (Allies). Abundance was ranged 2.126 ind./m2 and species with high abundance is Capitella (1.027 ind./m2), Terebellidae (375 ind./m2), Chaetopterus (300 ind./m2). Diversity index of all station were in low category (1,18-2), Uniformity index include in low category (0,40-0,72) and the Dominance index Station A (0,61).
Kajian Struktur Komunitas Fitoplankton Di Perairan Pantai Desa Tapak Kecamatan Tugu Kota Semarang Mayani, Putri Sakinah; Widianingsih, Widianingsih; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.561 KB) | DOI: 10.14710/jmr.v3i4.11412

Abstract

Fitoplankton merupakan biota tumbuhan yang bersifat autotrophic dan merupakan produsen primer di perairan. Perairan Pantai Desa Tapak dikelilingi oleh perumahan penduduk, kawasan industri, dan aktivitas nelayan yang akan menyumbang pencemaran organik maupun pencemaran anorganik. Perairan ini mengalami peningkatan ketinggian permukaan sebagai akibat pasang tinggi rob, yang mengakibatkan penggenangan daerah pertambakan dan sebagian dari estuaria. Penggenangan tersebut berakibat kepada peningkatan percampuran unsur hara yang diduga akan mempengaruhi keberadaan dan struktur komunitas fitoplankton pada daerah tersebut. Penelitian ini bertujuan untuk mengetahui struktur komunitas fitoplankton yang meliputi kelimpahan, keanekaragaman, keseragaman, dan dominasi fitoplankton di Perairan Pantai Desa Tapak, Kecamatan Tugu, Semarang. Penelitian ini dilaksanakan pada Oktober - November 2013. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif, pengumpulan data dengan Sample Survey Method. Sampel fitoplankton diambil secara horizontal dengan planktonnet 37 µm. Sejumlah 3 stasiun pengambilan sampel telah ditetapkan dengan metode pertimbangan (purposive sampling method). Hasil penelitian menunjukkan bahwa struktur komunitas fitoplankton di Perairan Pantai Desa Tapak tersusun atas 3 kelas fitoplankton yang terdiri dari 24 genus fitoplankton, yaitu kelas Bacillariophyceae (17 genus), kelas Dinophyceae (5 genus), dan Cyanophyceae (2 genus). Genus yang mempunyai kelimpahan tertinggi adalah Skeletonema, Thalassionema, Thalassiothrix, dan Pleurosigma dari kelas Bacillariophyceae. Kelimpahan fitoplankton rata-rata berkisar 25.426 – 34.100 sel/m3. Nilai keanekaragaman berkisar 1,68 – 2,05, dimana tertinggi pada stasiun II dan terendah pada stasiun III. Keseragaman berkisar 0,66 – 0,76, dimana tertinggi pada stasiun II yang diikuti dengan stasiun I dan stasiun III. Nilai dominansi berkisar 0,24 – 0,34, dimana tertinggi pada stasiun III dan diikuti stasiun I dan stasiun II
IDENTIFIKASI PIGMEN KAROTENOID PADA BAKTERI SIMBION RUMPUT LAUT Caulerpa cupressoides (Vahl) C. Agardh Arlita, Nurul Ria; Radjasa, Ocky Karna; Santoso, Adi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (197.73 KB) | DOI: 10.14710/jmr.v2i3.3134

Abstract

One of natural pigments besides Chlorophyll is carotenoid that has two classes, namely Xanthophyll and Carotene that have important roles for human helath like provitamin A, antioxidant, anticancer, and to improve the better immune responses. Carotenoids are yellow pigments, orange to red pigments that can be found in human, animals, high level plants, fruits, algae, fungi and bacteria. Bacterial symbionts produce pigments that are similar with their host. Pure cultures from marine microbial community can be isolated and cultivated in big scale in relatively short time. The purpose of this study was to as well as isolate and to identify pigments carotenoid from bacterial symbionts from seaweed Caulerpa cupressoides to identify bacterial symbionts that produce carotenoid pigments. Pigment analysis was performed by UVVis spectrophotometer and High Performance Liquid Chromatography (HPLC). Bacterial identification was performed based on biochemical tests. These results showed that from 13 bacterial symbionts isolated from Teluk Awur Waters, there was 2 isolates that positively synthesize carotenoids pigments, CJ.K and CJ.OR bacteria respectively, CJ.K bacterium contained of Violaxanthin and Neoxanthin pigments. While CJ.OR bacterium contained of Xanthophyll, Diadinoxanthin, γ-carotene, and β-carotene pigments. Bacterial identification showed that CJ.K bacterium was Brevibacterium maris and CJ.OR bacterium was Paracoccus alcaliphilus. This result showed that found some carotenoid pigments from bacterial symbiont of seaweed Caulerpa cupressoides.
Perbandingan Jenis dan Jumlah Echinodermata Di Perairan Pantai Krakal Gunung Kidul Yogyakarta Dan Pantai Pailus Jepara, Jawa Tengah Putri, Ardita Elok Mahendra; Sunaryo, Sunaryo; Endrawati, Hadi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.9 KB) | DOI: 10.14710/jmr.v8i2.25090

Abstract

Echinodermata merupakan biota yang dapat ditemukan hampir di semua ekosistem laut. Echinodermata cukup melimpah keberadaannya di kawasan terumbu karang, hal ini karena terumbu karang berperan sebagai tempat berlindung dan mencari makan bagi Echinodermata. Dalam rantai makanan, Echinodermata memiliki peranan sebagai pemakan seston atau detritus, dan merombak sisa bahan organik. Echinodermata juga berperan sebagai bioindikator parameter kualitas perairan. Penelitian ini bertujuan untuk mengetahui kelimpahan Echinodermata yang terdapat di Pantai Krakal, Gunung Kidul, Yogyakarta dan Pantai Pailus, Jepara, Jawa Tengah. Metode yang digunakan dalam penelitian ini yaitu metode deskriptif. Pengambilan sampel pada penelitian ini menggunakan metode transek kuadran dengan ukuran 1x1m. Hasil pengamatan di Pantai Krakal ditemukan 2 kelas dari filum Echinodermata, antara lain 3 species dari Kelas Ophiuroidea yaitu Ophiocoma erinaceus, Ophiocoma scolopendrina, Ophiarachna affinis, dan 3 species dari Kelas Echinoidea yaitu Echinometra viridis, Echinometra oblonga, dan Stomopneustes variolaris. Sedangkan jenis Echinodermata yang ditemukan di Pantai Pailus ditemukan 1 Kelas Echinodermata yaitu Holothuridea yang terdiri dari 3 spesies, yaitu Holothuria atra, Holothuria scabra, dan Holothuria leucospilota. Hasil penelitian menunjukkan kelimpahan individu tertinggi penelitian di Pantai Krakal adalah Ophiocoma scolopendrina (7,05 ind/m²),sedangkan kelimpahan individu tertinggi di Pantai Pailus adalah Holothuria scabra (2,13  ind/m²). Echinodermata is a biota that can be found almost in all marine ecosystems. Echinodermata quite abundant presence in the area coral reefs, because it serves as shelter and feed for Echinodermata. In the food chain, Echinodermata has a role as a seston eater or dentrite, and remodel the rest of the organic material. Echinodermata also serves as a bioindicator of water quality parameters. This study aims to determine the abundance of Echinodermata found in Krakal Beach, Gunung Kidul, Yogyakarta and Pailus Beach, Jepara, Central Java. The method used in this research was descriptive method. Sampling in this research used quadrant transect method with size 1x1m. The results of observation on Krakal Beach found 2 classes of Echinodermata phylum, among others 3 species of Ophiuroidea namely Ophiocoma erinaceus, Ophiocoma scolopendrina, Ophiarachna affinis, and 3 species of Echinoidea is Echinometra viridis, Echinometra oblonga, and Stomopneustes variolaris. While the type of Echinodermata found in Pailus Beach found 1 Class Echinodermata is Holothuridea consisting of 3 species, namely Holothuria atra, Holothuria scabra, and Holothuria leucospilota. The results showed the highest individual abundance of research on Krakal Beach was Ophiocoma scolopendrina (7,05 ind/m²), while the highest individual abundance in Pailus Beach was Holothuria scabra (2,13 ind/m²).
Studi Herbivori Rumput Laut Kappaphycus alvarezii (Doty) Doty oleh Ikan Baronang Siganus sp. pada Salinitas yang Berbeda Framegari, Vera; Nirwani, Nirwani; Santosa, Gunawan Widi
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (104.966 KB) | DOI: 10.14710/jmr.v1i1.886

Abstract

Kappaphycus alvarezii is one of seaweed species widely cultivated for producing high economic value carrageenan as raw material for pharmaceutical, cosmetic, food, etc.. During the cultivation of this seaweed there are some constrains found that is by fish herbivory by rabbitfish (Siganus sp.). One of factors thought to affect fish herbivory rabbitfish on seaweed is the salinity. Therefore, there is a need to conduct observation on Siganus sp. Herbivory at different levels of salinity. This research used Completely Randomized Design (CRD) with 5 treatments with 3 replications, namely were the treatment A (salinity 28 ppt), treatment B (30 ppt salinity), treatment C (salinity 32 ppt), treatment D (34 ppt salinity), and treatment E (salinity 36 ppt). Data were analyzed statistically with one-way ANOVA using SPSS software. The results showed that the salinity treatment gave a very significant influence (P <0.01) of seaweed herbivory K. alvarezii by rabbitfish. The results of this study were showed that the total weight of seaweed eaten by rabbitfish during the maintenance period of 30 days were: treatment A = (149.19 g), treatment B = (191.17 g), treatment C = (298.12 g), treatment of D = (212.87 g) and treatment E = (89.15 g). Body weight of fish at the end of the study were: treatment A (33.93 ± 6.35 g), treatment B (34.51 ± 4.34 g), treatment C (49.79 ± 5.67 g), treatment D (33.44 ± 14.12 g) treatment E (32.44 ± 2.72 g).
AKTIVITAS ANTI BAKTERI KITOSAN DARI CANGKANG KERANG SIMPING PADA KONDISI LINGKUNGAN YANG BERBEDA : KAJIAN PEMANFAATAN LIMBAH KERANG SIMPING (Amusium sp.) Sulistiyoningrum, Rina Setyowati; Suprijanto, Jusup; Sabdono, Agus
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (235.227 KB) | DOI: 10.14710/jmr.v2i4.3691

Abstract

Waste is one of the major problems in various countries in the world, one of which is the waste of marine products, for example clam shells. This waste can be processed into chitin and chitosan. Chitosan alone has a lot of benefits that have relatively high economic value, such as chitosan as a natural source antibacterial that can be effectively produced. Deacetylation degree of chitosan determined by using data from FTIR spectra and the value was 69.11349%. The results showed that there were soluble chitosan with 1% acetic acid. In the antibacterial test of chitosan on E. coli and S. aureus showed inhibition zone on agar medium. Chitosan provided large inhibition zones on 0.01 μg/disk and 0.02 μg/disk concentrations , however conditions factor of the media effected the growth of those bacteria. Bacteria E. coli bacterium was more sensitive to salinity than thah of S. aureus, while the S. aureus bacterium is more sensitive to pH than that of E. coli bacterium.
Distribusi Ukuran dan Tingkat Kematangan Gonad Portunus pelagicus, Linnaeus, 1758 (Malacostraca : Portunidae) di Perairan Rembang, Jawa Tengah Magfirani, Dina Ayu; Yudiati, Ervia; Hartati, Retno
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1086.593 KB) | DOI: 10.14710/jmr.v8i4.24853

Abstract

ABSTRAK : Rajungan merupakan komoditas ekspor bernilai ekonomis penting dan memiliki nilai komersial yang tinggi. Tingginya permintaan pasar terhadap komoditas perikanan rajungan memicu eksploitasi yang berlebihan sehingga dapat berdampak terhadap kelestarian sumber daya rajungan. Penelitian ini bertujuan untuk mengetahui distribusi ukuran, hubungan lebar dan berat, distribusi TKG, serta nisbah kelamin rajungan (Portunus pelagicus) di Perairan Gegunung Wetan, Rembang. Penelitian ini terdiri dari pengukuran panjang dan lebar karapas, pengamatan tingkat kematangan gonad rajungan betina, serta pengamatan kualitas air (salinitas, suhu, pH, kedalaman dan kecerahan). Hasil dari penelitian ini menujukkan dari 3000 ekor rajungan yang diamati diketahui distribusi lebar karapas rajungan berkisar antara 7,3 – 16  cm dengan kisaran berat sebesar 47–262 gram. Rajungan yang tertangkap memiliki pertumbuhan yang bersifat allometrik negatif, dengan nilai b sebesar 2,12 pada rajungan jantan, 1,65 pada rajungan betina. Faktor kondisinya adalah 1,1 pada jantan dan 1,02 pada betina. Sedangkan distribusi tingkat kematangan gonad rajungan betina adalah 762 ekor pada TKG 1; 700 ekor pada TKG 2; serta 388 ekor pada TKG 3.ABSTRACT : Blue swimming crab has a high economical value. The production of blue swimming crab is exported overseas, so, therefore, triggers the excessive exploitation. This will lead to have an impact related to the sustainability of natural resource. This research  aim to find out the size distribution, the relationship of carapace widht and body weight, gonad maturity stages distribution and sex ratio of blue swimming crab (P. pelagicus) at Gegunung Wetan Waters, Rembang. This consider to have a role as a tool on planning the farming and managing the blue swimming crab conservation. This research cover the length and width measurement of blue swimming crab carapace, gonad maturity stages observation of female blue swimming crab and water quality measurments (salinity, temperature, pH, water depth and water brightness). The result showed that 3000 blue swimming crabs have 7.3-16 cm of widht carapace distribution and 47-262 gram of average weight. It can be concluded that growth are negatively allometric with b value (2,12) for the male crabs and b value (1.65) for female crabs.. The condition factor of male crab  is 1,1 and female crabs is 1,02. Based on the research, the result also shows that gonad maturition stages of female crabs were 762 crabs for stage 1, 700 crabs for stage 2 and 388 crabs for stage 3.