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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 825 Documents
Stimulasi Reproduksi Aseksual Pada Stichopus horrens dan Stichopus vastus di Perairan Pulau Karimunjawa, Kabupaten Jepara Hermawan, Hermawan; 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 (288.097 KB) | DOI: 10.14710/jmr.v1i2.2028

Abstract

Sexual reproduction on trepang has many constraint than asexual reproduction, such as fertilization success relies on broodstock number in nature and water conditions as a habitat for trepang. Therefore, research on production of trepang seed in needed. The aim of this research were to stimulate and observe fission ability and regeneration of trepang S. horrens and S. vastus (Family Stichopodidae) as well as determine survival rate of individual fission results. This research was conducted during October–December 2011 using field experimental method and analyzed descriptively. Stimulaton fission on this study conducted by tying 1/3 of anterior part of trepang body using a rubber band. Result showed that S. horrens dan S. vastus can be stimulated by fission. In both species, smaller group showed easier and quicker fission, but large group has higher regeneration. Posterior parts of the both species of sea cucumbers succesfully formed a new mouth complex. Posterior parts have higher survival rate than anterior.
POTENSI RUMPUT LAUT Sargassum duplicatum SEBAGAI SUMBER SENYAWA ANTIFOULING Santi, Ika Wulan; Radjasa, Ocky Karna; Widowati, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (175.282 KB) | DOI: 10.14710/jmr.v3i3.5999

Abstract

Biofouling di laut menyebabkan kerusakan pada lambung kapal dan merusak infrastruktur kelautan lainnya. Rumput lautgenus Sargassum banyak dilaporkan sebagai alternatif sumber senyawa antifouling alami yang ramah lingkungan. Penelitian ini menggunakan S. duplicatum dari Perairan Teluk Awur Jepara yang diekstrak dengan berbagai pelarut (n-heksana, etil asetat dan metanol) untuk mengetahui potensi ekstrak sebagai antifouling dan golongan senyawanya serta untuk mengidentifikasi jenis bakteri biofilm yang sensitif terhadap ekstrak. Bakteri biofilm diisolasi dari panel kayu dan fiberglass yang dibenamkan dilaut selama 2 minggu. Uji aktivitas antimicrofouling menggunakan metoda disc diffusion, uji fitokimia menggunakan metoda Harborne (1987) dan uji biokimia menggunakan metoda Cowan and Steels (1974) dan Bergey’s (2005). Aktivitas antimicrofouling paling baik ditunjukan oleh ekstrak etil asetat yang dapat menghambat 22 dari 34 bakteri biofilm dengan kisaran zona hambat 0,65 – 3,73 mm. Sedangkan, bakteri yang paling sensitif terhadap ekstrak S. duplicatum adalah bakteri K.10.3.1.4 dan F.10.3.1.2. S. duplicatum mengandung senyawa golongan alkaloid, saponin, quinon, fenolik, steroid, dan flavonoid. Berdasarkan identifikasi bakteri secara biokimia, bakteri K.10.4.1.5 adalah genus Achromobacter, sedangkan kode isolat F.10.3.1.2 adalah genus Flavobacterium cytophaga. Kehadiran satu ataulebih senyawa fitokimia dalam ekstrak diduga bertanggung jawab atas aktivitas antifouling yang terjadi.
Morfometri Penyu Yang Tertangkap Secara Bycatch Di Perairan Sambas, Kalimantan Barat Fajar, Surya; Kushartono, Edi Wibowo; Redjeki, 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 (684.537 KB) | DOI: 10.14710/jmr.v7i2.25901

Abstract

ABSTRAK : Di dunia ada 7 jenis penyu dan 6 diantaranya terdapat di Indonesia. Penyu telah mengalami penurunan yang drastis jumlah populasinya dalam jangka waktu terakhir ini. Berkurangnya populasi penyu itu antara lain dipengaruhi oleh beberapa faktor dan salah satunya adalah penyu yang tertangkap secara bycatch oleh jaring nelayan. Penelitian ini bertujuan untuk mengetahui lokasi dan morfometri penyu yang tertangkap secara bycatch di perairan Sambas. Penelitian ini dilakukan pada tanggal 10 Maret - 31 Mei 2016 di Perairan Sambas, Kalimantan Barat. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Data yang dikumpulkan yaitu lokasi, jumlah dan morfometri yang meliputi panjang karapas dan lebar karapas penyu yang tertangkap secara bycatch serta pengambilan data parameter perairan yaitu suhu, pH, salinitas, kecerahan, dan kedalaman. Data yang telah didapat dianalisis menggunakan grafik dan analisis regresi korelasi. Hasil penelitian menunjukkan bahwa daerah laut Selimpai merupakan lokasi tertangkapnya penyu secara bycatch paling banyak dengan jumlah 4 ekor Penyu hijau dan 3 ekor Penyu Lekang tertangkap secara bycatch diberbagai lokasi di perairan Sambas. Morfometri penyu yang tertangkap secara bycatchmemiliki ukuran panjang karapas berkisar 38 - 68 cm dan lebar karapas berkisar 35 - 65 cm. Penambahan ukuran panjang karapas diikuti dengan penambahan ukuran lebar karapas yang dibuktikan dengan nilai determinasi (R²) sebesar 0,991 atau 99,1 %. Parameter lingkungan memiliki nilai suhu rata - rata adalah 28,95°C, nilai pH adalah 7, nilai salinitas rata - rata adalah 28,27 ‰, nilai kecerahan rata - rata adalah 2,26 m dan nilai kedalaman rata - rata adalah 12,86 m.ABSTRACT : In the world there are 7 species of sea turtles and 6 of which are found in Indonesia. The sea turtles has undergrone a drastic decline in the number of population in this last periode of time. The decline in the population of sea turtles that, among others, is influence by several factors and one of them was captured bycatch by fishermen nets. This research aims to know the location and morphometrics of sea turtles are caught in bycatch in the waters of Sambas, West Kalimantan. This research wa conducted on 10th march – 31st may 2016 in the waters of Sambas, West Kalimantan. The methods use in this research is descriptive method. The data collected that is the location, number and morphometrics which includes carapace length and carapace width of sea turtles caught in bycatch and data retrieval parameters water is temperature, pH, salinity, brightness and depth. Data obtaines were analyzed using graph and correlation regression analysis. The results showed that in sea Selimpai was the location of the capture of sea turtles in most heavily by the number of 4 green turtles and 3 olive ridley are caught in bycatch has a size of carapace length range in 38 - 68 cm and carapace width range in 35 - 65 cm. The additions of the carapace length size affects the size of the addition of the carapace width as evidence by value determination (R²) of 0,991 atau 99,1 %. Environmental parameters has a value of average temperature is 28,95°C, a value of pH is 7, the value of the average salinity is 28,27 ‰, average brightness value is 2,26 m and an average depth is 12,86 m.
Kajian Bioekologi dan Strategi Pengelolaan Ekosistem Mangrove : Studi Kasus di Teluk Awur Jepara Pradana, Oky Yuripa; Soenardjo, Nirwani; Suryono, Suryono
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.939 KB) | DOI: 10.14710/jmr.v2i1.2056

Abstract

Mangrove ecosystem have an important role in the environment. The ecological values of mangrove Teluk Awur is a place for feeding, nursery and spawning ground mangrove organism. This environment also produce detritus that support the existence of organic matter in the waters around. The purpose of this research was to study the condition of mangroves bioecology and socio-economic conditions for integrated stakeholders strategy and management of mangrove Teluk Awur Jepara. Method used is case study, explorative and descriptive. Data were analyzed using SWOT analysis by weighting or scoring. The result showed Teluk Awur mangrove ecosystem in the categorized into good criteria because of it’s density > 1500 ind/ha. There are 27 mangrove species and various fauna depend their lives on to of Teluk Awur mangrove ecosystems. Management strategies are recommended as the first priority is providing mangrove rehabilitation activities involving the public directly (score 4.125). Second, environmental education and sustainable use of mangrove resources to local communities (score 2.887). Third, rulemaking and standard operating procedure (SOP) specifically management of Teluk Awur mangrove ecosystems by Diponegoro University: Marine Station (score 2.601).
Pengaruh Pemberian Udang Ebi Dengan Konsentrasi Yang Berbeda Terhadap Pertumbuhan Tukik Penyu Hijau (Chelonia Mydas) Di Pantai Sukamade Kawasan Taman Nasional Meru Betiri Kabupaten Banyuwangi – Jawa Timur Saputra, Tri; Suryono, Suryono; Kushartono, Edi Wibowo
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (151.571 KB) | DOI: 10.14710/jmr.v3i4.8653

Abstract

Keberadaan penyu telah lama terancam, baik dari alam maupun kegiatan manusia. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pemberian konsentrasi pakan yang berbeda terhadap pertumbuhan tukik Penyu Hijau (Chelonia mydas) usia 4 hari selama masa perawatan 5 minggu. Penelitian ini menggunakan metoda eksperimental laboratoris. Materi yang digunakan adalah tukik penyu hijau (Chelonia mydas) usia 4 hari. Penelitian dilakukan di Pantai Sukamade Banyuwangi. Pakan yang diberikan berupa udang ebi sebesar 3% dan 8% dari berat biomassa. Hasil dari penelitian menunjukkan bahwa tukik yang diberi pakan udang ebi dengan konsentrasi 3% memiliki Laju Perumbuhan Spesifik rata-rata 1,429 ± 0,074  lebih kecil daripada tukik yang diberi pakan dengan konsentrasi 8% yang rata-rata 1,630 ± 0,192. Hasil analisis data homogenitas terlihat bahwa nilai signifikansi pada F = 2,952 (p=0,161) atau p > 0,05 maka data bersifat homogen, serta laju pertumbuhan spesifik tukik dengan perlakuan pemberian pakan dengan konsentrasi yang  berbeda menunjukan bahwa nilai F hitung 22,611 > F tabel 0,05 dan atau 0,01. Itu menyatakan bahwa kedua perlakuan berbeda sangat nyata pada signifikan 0,05 dan 0,01.Hasil penelitian menyimpulkan bahwa pertumbuhan penyu hijau dipengaruhi oleh pakan yang diberikan pada p<0,01
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.
Pengaruh Perbedaan Periode Aerasi Karbondioksida terhadap Laju Pertumbuhan dan Kadar Total Lipid pada Kultur Nannochloropsis oculata Norbawa, Puji; Yudiati, Ervia; Widianingsih, Widianingsih
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.699 KB) | DOI: 10.14710/jmr.v2i3.3126

Abstract

N. oculata is commonly used as a natural food in larviculture. Due to the fact on its highly lipid content, N. oculata is recently becoming one of a good candidate for a source of alternative energy. Microalgae utilizes CO2 during photosynthesis. This fact will lead and used this microalgaeas a carbondioxide degradator. Providing of carbon dioxide aeration is expected to increase the rate of growth of N. oculata as well as total lipid production.This research aimed to determine the effect of different periods on carbondioxide aerationon the growth rate and total lipid production in N. oculata culture.The results showed that different time on carbondioxide aeration was significantly different (P < 0.05) on the average growth rate as well as total lipid production. Carbondioxide aeration treatment for 3 minutes have the highest average growth rate which is0,574 doubling/ day. While the average growth rate at treatment aeration for 4 minutes almost equal to the control i.e. 0,484 doubling/ day and 0,462 doubling/ day. The highest percentage of total lipid production has reached in 4 minutes carbondioxide aeration treatment (80.58%-dw). Furthermore, the lipid production on 1 minute, 2 minutes aeration time and control were 65.98%-dw, 65.77%-dw and 64.98%-dw, respectively. The treatment with carbondioxide aeration for 3 min was the lowest (39.72%-dw). Based on these results it can be concluded that carbondioxide aeration for 3 minutes increased the growth rate of N. oculata. However, the incrementon growth ratewere not accompanied withthe incrementon total lipid production.
Hubungan Kandungan Nitrat Dan Fosfat Dalam Substrat Terhadap Kerapatan Lamun Di Perairan Pantai Prawean, Jepara Subiakto, Achmad Yusuf; Santosa, Gunawan Widi; Suryono, Suryono; Riniatsih, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.503 KB) | DOI: 10.14710/jmr.v8i1.24329

Abstract

Senyawa nitrat dan fosfat merupakan nutrien yang dapat dijadikan sebagai petunjuk kesuburan perairan dan dibutuhkan baik pertumbuhan dan perkembangan lamun. Nutrien di perairan padang lamun berperan sebagai faktor pembatas pertumbuhan. Penyerapan nutrien oleh lamun dilakukan oleh daun dan akar. Besarnya kandungan nutrien dalam sedimen bukan berarti akan selalu dalam konsentrasi yang sama pada karakteristik  sedimen dasar dan kedalaman perairan. Bila terjadi perbedaan maka hal ini bisa mempengaruhi terjadinya perbedaan kondisi kepadatan dan sebaran pada setiap jenis lamun yang tumbuh dalam perairan, oleh karena itu perlu dilakukan penelitian tentang hubungan kandungan Nitrat dan fosfat dalam substrat terhadap kerapatan lamun di perairan pantai Prawean, Jepara. Penelitian ini dilakukan pada bulan Desember 2018- Januari 2019. Metode penentuan lokasi pengambilan sampel dengan metode purposive sampling. Materi yang digunakan dalam penelitian adalah sampel sedimen, parameter perairan, dan kerapatan lamun. Berdasarkan hasil penelitian didapatkan Nilai kandungan Nitrat di substrat Perairan Pantai Prawean Jepara berkisar antara 1,27–1,36 mg/L tergolong pada kategori kesuburan rendah. Nilai kandungan Fosfat pada sedimen yaitu 0,049–0,086 mg/L tergolong pada kategori rendah hingga tinggi. Tingkat kerapatan padang lamun berada pada kondisi kerapatan sangat  rapat (> 175 tegakan/m2).  Nitrate and phosphate compounds are nutrients that could be used as an indicator of aquatic fertility and needed by for growth and development of seagrass. Nutrients in seagrass waters serve as a limiting factor for growth. Nutrient absorption by seagrass were done by leaves and roots. The amount of nutrient content in sediment does not mean would be always same at the concentration on the basic sediment characteristics and depth water level. If there is a difference, it will cause an affect the different conditions of density and distribution in each type of seagrass which grows in the waters, therefore it is necessary to do research about relation of nutrient in the substrate to seagrass density in Prawean Beach, Jepara. This research was conducted in December 2018 - January 2019. The method used in this study was descriptive method. The material used in the study were sediment samples, water parameters, and seagrass density. Based on the results , it was found that the value of nitrate in substrate in the waters of Prawean Jepara Beach ranged from 1.27 - 1.36 mg. L-1 belonging to the low fertility category. The value of Phosphate content in substrate was 0.049 - 0.086 mg. L-1 belonging to the low until high category. The density level of seagrass at the tight density condition very tight >175 stands. m-2.
Komposisi Jenis dan Kelmpahan Ikan Karang di Perairan Pulau Parang Kepulauan Karimunjawa Jepara Wijanarko, Tutus; Munasik, Munasik; Ambariyanto, Ambariyanto
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.312 KB) | DOI: 10.14710/jmr.v2i4.3683

Abstract

Parang island is the most northwest island in the Karimunjawa islands, It has unique characteristic, namelyleeward and windwardwaters. It is suspected to be the factors that can affect the existence of coral reef ecosystem diversity and reef fish’s habitat.This study aims to determine the species composition and abundance of reef fish in the waters of Parang island, Karimunjawa.Data were collected by using abelttransectmethod(belt transect) along 75meter coastline. The results showed that the research location have a totally 1069 individuals. There were differences in the composition and abundance of reef fish in the waters in the east, south, west and north. The highest abundance of reef fish was found in the north side the island, there were 462 fish which composed of 20 species and 9 families. Family which has the highest species composition was Pomacentridae and Labridae. The lowest abundance of reef fish was found in the waters in the west side with 146 fish which was composed of 11 species of 5 family of reef fish, and species of fish that hasthe highest constituent of abundance was Family Pomacentridae and Labridae. There were 203 reef fish found on the south side of theParangisland thatborders directly with Kumbang Island, which was composed of 16 species, 8 family, and species of fish that has the highest constituent wereFamily Pomacentridae and Caesionidae. While in the waters of the eastern side the dominance fish was found Family Apogonidae fairly high as 144 individu, from the total 258 individu reef fish consisting of 15 species and 6 families.Differences incompositionandabundance species ofreef fishin the waters ofParang islandis presumably becauseof differences inthe life form condition ofcoral reef habitatfrom effect leeward and windward of Parangisland, Karimunjawa Islands.
Distribusi Horizontal Zooplankton Berdasarkan Salinitas Di Perairan Bonang Kabupaten Demak Indonesia Yudhatama, Bayu Khrisna; Redjeki, Sri; 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 (431.937 KB) | DOI: 10.14710/jmr.v8i3.24988

Abstract

ABSTRAK: Zooplankton merupakan salah satu biota yang sensitif akan perubahan karakteristik perairan. Zooplankton sering dijadikan indikator terhadap kondisi ekologis suatu perairan. Tujuan dalam penelitian ini yaitu untuk mengetahui Distribusi zooplankton dan pengaruh perbedaan salinitas pada distribusi zooplankton di Perairan Bonang Kabupaten Demak. Lokasi penelitian dibagi menjadi tiga stasiun yaitu Stasiun A (Sungai), Stasiun B (Muara), Stasiun C (Laut). Sampel diambil dengan plankton net di ketiga stasiun tersebut dengan tiga kali pengulangan dan tiga waktu pengulangan di setiap stasiunnya. Hasil penelitian ini ditemukan 20 genus zooplankton yaitu Corycaeus sp, Muggiaea sp, Mysis sp, Penaeus sp, Macrobrachium sp, Anisomysis sp, Pleuromamma sp, Thysanopoda sp, Euterpina sp, Undinula sp, Acartia sp, Arcella sp, Acrocalanus sp, Centropages sp, Candacia sp, Halopthilus sp, Paracalanus sp, Metridia sp, Pseudocalanus sp, Emplectonema sp yang termasuk ke dalam 6 Kelas, Keenam kelas tersebut terdiri dari Hydrozoa, Malascostraca, Maxillopoda, Tubulinea, dan Hexanaulipa.  Hasilnya nilai P yaitu 0,00008 < 0,5 yang berarti salinitas memberi dampak pada distribusi horizontal zooplankton berdasarkan Uji Anova. ABSTRACT: Zooplankton is one of the sensitive biota to respond environmental aquatic of changes. Zooplankton is frequently used as an indicator of the ecological conditions of waters. The purpose of this study is to determine the distribution of zooplankton and the effect of differences in salinity on zooplankton distribution in the coastal waters of Bonang Demak Regency. The research location is divided into three stations namely Station A (River), Station B (Estuary), Station C (Marine). Samples were taken with a plankton net at the three stations with three repetitions and three repetitions at each station. The results of this study found 20 genera zooplankton namely Corycaeus sp, Muggiaea sp, Mysis sp, Penaeus sp, Macrobrachium sp, Anisomysis sp, Pleuromamma sp, Thysanopoda sp, Euterpina sp, Undinula sp, Acartia sp, Arcella sp, Acrocalanus sp, Centropages sp, Candacia sp, Halopthilus sp, Paracalanus sp, Metridia sp, Pseudocalanus sp, Emplectonema sp included in 6 Classes, The six classes consist of Hydrozoa, Malascostraca, Maxillopoda, Tubulinea, and Hexanaulipa. The result is P value P = 0,00008 < 0,5 that meansthe zooplankton distribution is influenced by salinity based on the Anova Test  

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