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All Journal ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Journal of Marine Research Jurnal Kelautan Tropis Indonesian Journal of Mollusk

Sri Redjeki

Department Of Marine Science, Faculty Of Fisheries And Marine Science, Diponegoro University

Author-ID : 2954784

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Environmental Science

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Distribution and Size of Crab (Portunus pelagicus) in Betahwalang Waters, Demak, Central JavaSex Ratio, Size Distribution and Length-Weight Relationship of Portunus pelagicus Linnaeus, 1758 (Malacostraca : Portunidae) in Betahwalang, Demak, Central Java Sri Redjeki; Muhammad Zainuri; Ita Widowati; Ambariyanto Ambariyanto; Rudhi Pribadi; Michael Abbey
Jurnal Kelautan Tropis Vol 24, No 1 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i1.10467

Blue Swimming Crab (P. pelagicus, Linnaeus, 1758) is the main fisheries product from Betahwalang peoples. Fishing activity of Blue Swimming Crab by the fisherman almost every day in Betahwalang waters. Distribution and body size data of Blue Swimming Crab can be used for sustain management reference. The purpose of this study was to determine distribution pattern and body size of Blue Swimming Crab, started from July to November 2018 in Betahwalang waters, Demak. The data analyze consist of sex ratio, carapace width distribution and relationship between carapace width and body weight. 11790 samples Blue Swimming crab from Betahwalang waters consist of 7070 female crabs and 4720 male crabs. The result showed that sex-ratio between male and female crabs are balanced (1.0:1.37), with the most female crabs found at July and August. Body size distribution of male and female crabs are dominated in class 103-111 mm carapace width. Male and female crabs have a positive allometric on growth parameters, that means growth of the body weight is faster than carapace width. The result showed that Blue Swimming Crab in Betahwalang waters are support for sustainable fisheries.

Beberapa Aspek Biologi Reproduksi Rajungan (Portunus pelagicus) di Perairan Betahwalang Demak Hargo Seno Wahyu Edi; Ali Djunaedi; Sri Redjeki
Jurnal Kelautan Tropis Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

The waters of Betahwalang, Demak have quite potential cruise resources. For the sustainability of crab resources, sustainable management is necessary to do. Information on biology reproduction of crabs is required. The purpose of this research was to determine aspects of biology reproduction such as sex ratio, growth pattern and gonad maturity level of the crabs in Betahwalang waters. This research was conducted on 23 September - 29 October 2016 in Betahwalang, Demak. The method used in this research is descriptive research method. Determination of location observation is divided into 3 Station that is Station 1 depth between 1-10 m, Station 2 depth 11-20 m, and Station 3 depth 21-30 m. The data were collected by determination of gender, width and length of carapace, gonad maturity level and data of the environmental parameter. Results of the analysis showed that the male genital sex ratios were higher at Station 1 (2.87:1) than Station 2 (1:1.27) and 3 (1:1.65). The growth properties of male and female crabs on all three stations exhibit negative allometric growth properties. The percentage of female crab gonad maturity level at Station 2 (94,31%) and 3 (95,48%) higher than Station 1 (30,43%). Wilayah perairan Betahwalang, Demak memiliki sumberdaya rajungan yang cukup potensial. Untuk kelestarian sumberdaya rajungan, perlu dilakukan dengan pengelolaan perikanan rajungan berkelanjutan. Dibutuhkan informasi tentang aspek biologi reproduksi rajungan sangat diperlukan. Tujuan penelitian ini adalah untuk mengetahui aspek biologi reproduksi seperti nisbah kelamin, pola pertumbuhan dan tingkat kematangan gonad rajungan di perairan Betahwalang. Penelitian ini dilaksanakan pada tanggal 23 September - 29 Oktober 2016 di perairan Betahwalang, Demak. Metode yang digunakan dalam penelitian ini adalah metode penelitian deskriptif. Penentuan lokasi pengamatan dibagi menjadi 3 Stasiun yaitu Stasiun 1 kedalaman antara 1-10 m, Stasiun 2 kedalaman 11-20 m, dan Stasiun 3 kedalaman 21-30 m. Pengambilan data penelitian meliputi penentuan jenis kelamin, lebar dan panjang karapas, tingkat kematangan gonad serta data parameter lingkungan. Hasil penelitian menunjukkan bahwa nisbah kelamin rajungan jantan lebih tinggi pada Stasiun 1 (2,87:1) daripada Stasiun 2 (1:1,27) dan 3 (1:1,65). Sifat pertumbuhan rajungan jantan dan betina pada ketiga Stasiun menunjukkan sifat pertumbuhan allometrik negatif. Persentase tingkat kematangan gonad rajungan betina pada Stasiun 2 (94,31%) dan 3 (95,48%) lebih tinggi daripada Stasiun 1 (30,43%).

Studi Keanekaragaman Makrozoobentos Pada Habitat Lamun Hasil Transplantasi dengan Metode Ramah Lingkungan Ita Riniatsih; Retno Hartati; Sri Redjeki; Hadi Endrawati
Jurnal Kelautan Tropis Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Damage to seagrass ecosystems resulting in loss of habitat makrozoobentos.The effort to fix them with seagrass transplantation program. Transplantation of seagrass with environment friendly techniques is expected to help to recreate habitat for makrozoobentos. Research on makrozoobentos diversity in habitats seagrass transplantation results using two methods of transplantation techniques bamboo frame and bamboo tubes. The seagrass Enhalus acoroides type is transplanted. Research conducted in the waters of the Teluk Awur and Bandengan, Jepara and was conducted from August-November 2017. Research carried out with the widest swath of 4x4m with depth 85-100 cm. The number of type makrozoobnetos which is obtained during research is captured as many as 25 types look different at each sampling observations. Until the end of the observation makrozoobentos abundance ranged from 106.1-89.8 ind/m2 on the transplantation of seagrass with bamboo frames and methods of tube bamboo and seagrass pastures in both locations. Index of diversity and uniformity of makrozoobentos obtained in the category of low to moderate from each treatment. Kerusakan ekosistem padang lamunmengakibatkan hilangnya habitat makrozoobentos. Upaya untuk memperbaikinya dengan melakuka transplantasi lamun.Transplantasilamun dengan metode yang ramah lingkungan diharapkan dapat membantu untuk menciptakan kembali habitat untuk biota bentik (makrozoobentos). Penelitian tentang keanekaragaman makrozoobentospada habitat lamun hasil transplantasi menggunakan dua metode transplantasi yaitu metode frame dan tabung bambu. Lamun yang ditransplantasikan adalah jenis Enhalus acoroides. Penelitian yang dilakukan di perairan padang lamun di Teluk Awur dan Bandengan Jepara ini dilaksanakan dari Agustus–Nopember 2017. Penelitian dilakukan dengan petak seluas 4x4m dengan kedalaman 85-100cm.Jumlah jenis makrozoobnetos yang diperoleh selama penelitian adalah sebanyak 25 jenis yang tertangkap terlihat berbeda disetiap sampling pengamatan. Hingga akhir pengamatan kelimpahan makrozoobentos berkisar antara 89,8-106,1 ind/m2 pada transplantasi lamun dengan metode frame bambu dan tabung bambu serta padang lamun asli di kedua lokasi. Indeks Keanekaragaman dan keseragaman makrozoobentos yang diperoleh dalam kategori rendah hingga sedang pada ketiga perlakuan di atas.

Morfometri Dan Pertumbuhan Scylla serrata (Filum: Arthropoda, Famili: Portunidae) Di Desa Panikel, Segara Anakan, Cilacap Widianingsih Widianingsih; Ria Azizah Tri Nuraini; Retno Hartati; Sri Redjeki; Ita Riniatsih; Cantika Elistyowati Andanar; Hadi Endrawati; Robertus Triaji Mahendrajaya
Jurnal Kelautan Tropis Vol 22, No 1 (2019): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Mud crab is one of fishery commodities which is important in Indonesia . The high demand for mud crabs needs to be balanced with the right management strategy, so that the population will not extinction. Penikel Village, Cilacap is one of the fishing villages which catch mud crabs because of the high demand in the big cities such as Jakarta, Bandung and Bali. The purpose of this study is to determine the population and growth patterns of mud crabs in the Panikel Village, Kampung Laut District, Cilacap. The location of the study was determined by purposive sampling. Wadong and bubu are fishing tools to catch mud crabs. Sampling 67 mud crabs was carried out on Juni 2016, after that, measurement of length, carapace width and total weight were carried out. Regression analysis between carapace width and total weight and condition factors were carried out to determine growth patterns. Based on the research, the average value of the S. serrata length was 63.94±11.31 mm while the female one was 70.29±14.57 mm. The average value of carapace width is 92.28±15.51 mm (male) while for female sex was 98.71±18.38 mm. The average weight of S. serrata male crabs was 190.31±118.43 mm, while those of female sex were 210.77±120.93 mm. Furthermore, based on the analysis of the relationship between the length of weight found negative allomatric growth pattern with the value of the condition factor included in the low category both for male sex 0.73-1.93 and for female sex 0.59-1.66. The low condition factor shows that the condition of Segara Anakan waters especially Penikel Village does not support the growth of mud crabs (S. serrata). Kepiting bakau (Scylla serrata) merupakan salah satu komoditas perikanan yang terpenting di Indonesia. Besarnya permintaan kepiting bakau yang tinggi perlu diimbangi dengan strategi pengelolaan yang tepat agar populasi tidak punah. Desa Penikel, Cilacap merupakan satu desa nelayan yang banyak menangkap kepiting bakau karena tingginya permintaan di kota besar seperti Jakarta, Bandung dan Bali. Tujuan dari penelitian ini untuk mengetahui populasi dan pola pertumbuhan kepiting bakau di Desa Panikel, Kecamatan Kampung Laut, Cilacap. Penentuan lokasi penelitian dilakukan secara purposive sampling. Wadong dan bubu merupakan alat tangkap untuk menangkap kepiting bakau. Pengambilan sampel kepiting sebanyak 67 individu dilakukan pada bulan Juni 2016, setelah itu dilakukan pengukuran panjang, lebar karapas serta berat total. Analisa regresi kurva antara lebar karapas dan berat total serta faktor kondisi dilakukan untuk mengetahui pola pertumbuhan. Berdasarkan penelitian diperoleh nilai rata-rata panjang kepiting bakau S. serrta jantan adalah 63.94±11.31 mm sedang untuk yang betina adalah 70,29±14.57 mm. Nilai rata-rata lebar karapas adalah 92.28±15.51 mm (jantan) sedang untuk jenis kelamin betina adalah 98.71±18.38 mm. Rata-rata berat kepiting jantan S. serrata adalah 190.31±118.43 mm, sedangkan yang jenis kelamin betina adalah 210.77±120.93 mm. Selanjutnya berdasarkan analisa hubungan panjang berat ditemukan pola pertumbuhan allomatrik negatif dengan nilai factor kondisi termasuk dalam katagori rendah baik untuk jenis kelamin jantan 0,73–1,93 maupun untuk kelamin betina 0,59–1,66. Rendahnya factor kondisi menunjukkan bahwa kondisi perairan Segara Anakan khususnya Desa Penikel tidak menunjang bagi petumbuhan kepiting bakau (S. serrata).

Biology Reproduction and Dynamic of Gonads Maturity Blue Swimming Crabs (Portunus pelagicus) in Betahwalang Waters, Demak Sri Redjeki; Muhammad Zainuri; Ita Widowati; Abdul Ghofar; Elsa Lusia Agus; Mustagpirin Mustagpirin; Panji Ayodya
Jurnal Kelautan Tropis Vol 23, No 3 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i3.8977

The waters of Betahwalang, Demak has quite potential fisheries resources. For the sustainability of crab resources, active management is necessary applied. Information on biology reproduction of crabs is required. The purpose of this research was to determine the biological aspects of sex ratio and the dynamics of the gonadal maturity level. This research was conducted on September-November 2018 in Betahwalang Waters. The method used in this study is a descriptive research method. Data were collected by determining gender, weight and width of the carapace, the level of gonadal maturity. The results from observations of crab landed with a total of 6,292 crabs showed a percentage of 37.30% males and 62.70% females with sex ratios in September (1: 1.70), October, (1: 1.46), and November (1: 1.98). The observation of gonadal maturity level in September (Level I 162 crabs, Level II 1425 crabs, Level III 607 crabs) in October (Level I 130 crabs, Level II 832 crabs, Level III 207 crabs), and in November (Level I 46 crabs, Level II 753 crabs, Level III 195 crabs). The results show that the average crab catch on Betahwalang waters is dominated by the gonad II maturity level reaching (> 70%) of the total female caught. The results of the gonad maturity level are influenced by weather and season factors where the trend of the gonad maturity level will drop in the rainy season or in November.

The Effect of Ultrasonic Wave Exposure on The Chlorophyll-a, b And Carotene Content of Nannochloropsis sp. Hadi Endrawati; Muhammad Zainuri; Widianingsih Widianingsih; Retno Hartati; Robertus Triaji Mahendrajaya; Sri Redjeki; Ita Riniatsih; Ria Azizah
Jurnal Kelautan Tropis Vol 21, No 2 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Determination of chlorophyll-a, b and carotene content in microalgae is strongly dependent on the destruction of its cell wall during extraction process. Harvesting of microalgae is important because it will influence the nutrition content. The objective of present work is to optimize harvesting of Nannochloropsis sp by application of ultrasonic wave with frequency of 40 KHz under different exposure time. There were 3 treatments, i.e. exposure time of 5, 10 and 15 minutes. The chlorophyll-a, b, and carotene content were measured to gauge the effect of treatments. The result revealed that the cell wall of Nannochloropsis sp which made from carbohydrate were successfully broken by ultrasonic source equipment. It showed that the exposure time of 5, 10 and 15 minutes affected cell wall’s breaking percentage of Nannochloropsis sp cell by 10,35; 32,15; and 72,09 %, respectively. The longer exposure time of ultrasonic wave, the higher content of chlorophyll-a, b, and carotene.

Pertumbuhan ikan Nila Larasati (Oreochromis niloticus) di Tambak dengan Pemberian Ransum Pakan dan Padat Penebaran yang Berbeda Ali Djunaedi; Rudhi Pribadi; Retno Hartati; Sri Redjeki; Retno W. Astuti; Bintang Septiarani
Jurnal Kelautan Tropis Vol 19, No 2 (2016): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Red Nile Tilapia of Larasati strain (Oreochromis niloticus)have capability to digest feed quite efficient, able to grow faster and diseases resistant. They are also tolerant to high salinity and more resilent to environmental change, therefore very prospecytive to be cultivated in tambaks (brackishwater pond). The objective of present work was to determine the effect of larvae stocking density and feed ration on the growth and survival rate of Nile Tilapia in brackishwater pond. The larvae was hacthed in freshwater and acclimatized gradually in brackishwater media and then reared ini cage size of 1x1x1,5meter3with different food ration (3, 5 and 7% body weight)andstocking density of 10, 15, 20 indv./m2).The result showed that the more food ration gave the better growth rate of larvae in stocking density of 10 and 15 indv./m2, the best food ration in 20 indv./m2 was 5% body weight. Upon that result it is recommended to stock the alvae at level of 20 indv./meter and gave food of 5% per body weight. The treatments was not influenced the survival rate of fish cultured. Ikan Nila Larasati memiliki kemampuan mencerna makanan secara efisien, memiliki pertumbuhan yang cepat serta lebih resisten terhadap penyakit, daya adaptasi luas dan toleransinya yang tinggi terhadap berbagai kondisi lingkungan sehingga prospektif dibudidaya di tambak. Penelitian ini bertujuan untuk melakukan kajian tentang pengaruh padat tebar dan ransum pakan terhadap pertumbuhan dan kelulushidupan ikan Nila Larasati yang dipelihara pada tambak air payau. Ikan Nila Larasati dibenihkan di lingkungan air tawar dan diaklimatisasi secara bertahap di media air payau sebelum digunakan dalam penelitian ini. Percobaan pemeliharaan ikan Nila Larasati dilakukan pada karamba berukuran 1x1x1,5meter3dengan ransum pakan(3, 5 dan 7% bobot biomasa ikan) dan padat penebaran yang berbeda (10, 15, 20 ekor/m2).Hasil penelitian menunjukkan pemberian ransum pakan harian baik 3, 5 dan 7% perhari pada ikan nila dengan kepadatan 5, 10 dan 20 ekor/meter menunjukkan hasil pertumbuhan berat mutlak yang relatif baik, namun untuk efisiensi pakan disarankan untuk melakukan penebaran 20 ekor/meter dengan ransum 5% berat biomasa ikan perhari. Kelulushidupan ikan Nila Larasati tidak dipengaruhi oleh perlakuan.

Kepadatan Dan Persebaran Kepiting (Brachyura) Di Ekosistem Hutan Mangrove Segara Anakan Cilacap Sri Redjeki; Mas’ad Arif; Retno Hartati; Laras Kinanti Pinandita
Jurnal Kelautan Tropis Vol 20, No 2 (2017): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Segara Anakan area is a lagoon surrounded by mangrove forests and muddy land. Mangrove forests have an ecological function such as spawning ground, nursery ground, and feeding ground for various biota. The destruction of mangrove forests caused by human activities is quite alarming and affects the survival of living biota in it, one of them is crabs. Changes in the structure and composition of the crabs in mangrove ecosystems caused by habitat changes can be used as an indicator for water quality by biological index approach through population monitoring, community composition, or even the ecosystem function. So that, by the study of abundance and distribution of crabs on mangrove vegetation, the results can be used as monitoring of environmental conditions of mangrove ecosystems in Segara Anakan Area. This research was conducted to determine about the composition, abundance, diversity index, uniformity index, dominance index, and pattern of distribution of crabs on mangrove ecosystems in Segara Anakan, Cilacap. The sampling was conducted in July, 2016 in 3 locations namely Panikel, Bondan, and Kalibuntu. To determine the sampling location using random method of stratification. Crab sampling using 5m x 5m transect method in 3 stations with 3 repetitions at each station. The results of this research found 12 species consisting of 3 families of crabs. Ocypodidae Family is the most commonly crabs found in 3 location. The highest abundance of crab is in Kalibuntu (1,56 ind/m2) an the lowest abundance is in Panikel (1,27 ind/m2). There are two pattern of distribution of crabs in this research, namely random and clumped. The diversity index values are in the medium category, whereas the uniformity index value is in the high category. In this research there is no dominance in all research location. Kawasan Segara Anakan merupakan laguna yang dikelilingi oleh hutan-rawa mangrove yang luas dan daratan berlumpur. Hutan mangrove memiliki fungsi ekologis antara lain sebagai tempat pemijahan, pembesaran, dan mencari makan bagi berbagai biota didalamnya. Kerusakan hutan mangrove yang terjadi karena adanya aktivitas manusia cukup mengkhawatirkan dan berpengaruh terhadap kelangsungan hidup biota yang hidup didalamnya, salah satunya adalah kepiting. Perubahan struktur dan komposisi kepiting pada ekosistem mangrove yang diakibatkan oleh adanya perubahan habitat dapat dijadikan indikator kualitas perairan dengan pendekatan indeks biologi melalui monitoring jumlah populasi, komposisi komunitas maupun fungsi ekosistemnya. Sehingga dengan dilakukannya kajian tentang Kepadatan dan Persebaran kepiting pada vegetasi mangrove hasilnya dapat digunakan sebagai monitoring kondisi lingkungan ekosistem mangrove di Kawasan Segara Anakan. Penelitian ini dilakukan untuk mengetahui komposisi, kepadatan, indeks keanekaragaman, keseragaman, dominansi, dan pola sebaran kepiting pada ekosistem mangrove di Segara Anakan Cilacap. Pengambilan sampel dilaksanakan pada bulan Juli 2016 di 3 lokasi yakni Desa Panikel, Bondan, dan Kalibuntu. Penentuan lokasi sampling dengan metode acak berstratifikasi Pengambilan sampel kepiting menggunakan metode transek 5m x 5m dengan jumlah stasiun sebanyak 3 dan 3 kali pengulangan pada setiap stasiunnya. Hasil penelitian ditemukan 12 jenis spesies yang terdiri dari 3 famili kepiting. Famili Ocypodidae paling banyak ditemukan pada 3 lokasi penelitian. Kepadatan kepiting tertinggi terdapat pada Lokasi Kalibuntu (1,56 ind./m2) dan terendah di Lokasi Panikel (1,27 ind/ m2). Terdapat dua pola sebaran kepiting di lokasi penelitian, yaitu acak dan mengelompok. Nilai Indeks Keanekaragaman masuk dalam kategori sedang, sedangkan nilai indeks keseragaman dalam kategori tinggi. Dalam penelitian ini tidak terdapat dominansi pada seluruh stasiun penelitian.

Jenis-Jenis Bintang Laut Dan Bulu Babi (Asteroidea, Echinoidea: Echinodermata) Di Perairan Pulau Cilik, Kepulauan Karimunjawa Retno Hartati; Endika Meirawati; Sri Redjeki; Ita Riniatsih; Robertus Triaji Mahendrajaya
Jurnal Kelautan Tropis Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Echinoderms are fundamentally good indicators of health and status of coralline communities in marine waters. Substrat of sandy, rububle and coral reefs are good habitat for Asteroidea dan Echinoidea. This study aim to identify sea star (Asteroidea) and sea urchin (Echinoidea) species from Pulau Cilik waters of Karimunjawa Islands. Asteroidea and Echinoidea observed using the line transect method used, ie subjects within the same distance between the transect and the transect square with observations of 2.5 m on the right and left of transect line line. Morphology, habitat type (substrate & depth) and total number of sea stars and sea urchins at each station were determined. The results showed that Pulau Cilik has six species of Asteroidea (Sea star), ie Linckia laevigata, L. multifora, Neoferdifla ocellata (Family Ophidiasteridae), Luidia alternate (Luidiidae Family), Culcita novaeguineae (Family Oreasteridae) and Acanthaster planci which belongs to Family Acanthasteridae. There were 4 species of Echinoidea Sea urchin) found, i.e. Diadema setosum, D. antillarum, D. savignyi and Echinothrix calamaris, which all were family members of Diadematidae Echinodermata pada dasarnya merupakan indikator kesehatan dan status dari terumbu karang di laut. Dasar perairan yang landai dengan substrat pasir, terumbu karang dan pecahan karang yang merupakan habitat bagi hewan jenis Asteroidea dan Echinoidea. Penelitian ini bertujuan untuk mengidentifikasi henis-jenis bitang laut dan bulu babi dari perairan Pulau Cilik, Kepulauan Karimunjawa. Pengamatan Asteroidea dan Echinoidea menggunakan metoda line transect yang dimodifikasi, yaitu mengamati subjek dalam jarak yang sama sepanjang garis transect dan kuadrat transect dengan pengamatan 2,5 m di sebelah kanan dan kiri garis line transect. Morfologi, tipe habitat (substrat & kedalaman) dan jumlah total bintang laut dan bulu babi di tiap stasiun dicatat selanjutnya sampel diidentifikasi berdasarkan ciri morfologi tersebut. Hasil penelitian menunjukkan bahwa di perairan Pulau Cilik ditemukan enam spesies Asteroidea (Bintang Laut), yaitu Linckia laevigata, L. multifora, Neoferdifla ocellata (Famili Ophidiasteridae), Luidia alternate (Famili Luidiidae), Culcita novaeguineae (Famili Oreasteridae) dan Acanthaster planci yang termasuk dalam Famili Acanthasteridae. Species Echinoidea (Bulu Babi) ditemukan 4 spesies Diadema setosum, D. antillarum, D. savignyi dan Echinothrix calamaris semua anggota famili Diadematidae.

Komposisi Fitoplankton Pada Tambak Kerang Ken Suwartimah; Ika Desie Wulandari; Retno Hartati; Sri Redjeki
Jurnal Kelautan Tropis Vol 20, No 1 (2017): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

This study aims to determine to determine the species composition, abundance and community structure of phytoplankton in shellfish aquaculture ponds blood (Anadara granosa) in Menco, District Wedung, District Demak.Metode used in this study is Diskriptif method, determination of the location of the study is purposive sampling Methods, namely the determination of the sampling locations should be based on consideration, the station I to III of the sampling stations representing keseluruan research area. Marine research station is Blood Shellfish Farming in Hamlet Menco. Station is divided into three stations, with making four periods. Environmental parameters taken include: salinity, temperature, pH, DO, nitrate, phosphate, dissolved oxygen, organic materials. The results of the study, found 19 genera of phytoplankton. Phytoplankton abundance 2596-18844 cells / L. Diversity index (H ') based on the total period ranged from 1.098 to 1.837. On January 18-March 3, 2014, categorized into the diversity index medium. Uniformity index (e) the entire period ranged from 0.616 to 0.999. Fitoplankton atau mikroalga merupakan makanan utama kerang di tambak. Penelitian ini bertujuan untuk mengetahui komposisi jenis, kelimpahan, dan struktur komunitas fitoplankton pada tambak budidaya kerang darah (Anadara granosa) di Menco, Kecamatan Wedung, Kabupaten Demak. M etode yang digunakan dalam penelitian ini adalah metode Deskriptif. Sampel fitoplankton diambil dari Tambak Kerang Darah selama empat periode. Parameter lingkungan sebagai data penunjang adalah salinitas, suhu, pH, DO, nitrat, fosfat, oksigen terlarut, bahan organik. Hasil penelitian menjunjukkan terdapat 19 genus fitoplankton, dengan kelimpahan 2.5-18.8x103sel.L-1. Indeks keanekaragaman (H’) berdasarkan total keseluruhan periode berkisar antara 1,098-1,837. Pada tanggal 18 Januari-3 Maret 2014, dikategorikan masuk dalam indeks keanekaragaman sedang. Indeks keseragaman (e) keseluruhan periode berkisar antara 0,616–0,999.

Co-Authors Abdul Ghofar Adi Santoso Aditya Dwi Nugroho Agus Sabdono Ahmad Yassin Ali Djunaedi Ali Djunaedi Ambariyanto Ambariyanto Anggit Sapta Raudina Annisa Rahma Firdaus Argina Dewi S Aufa Anam Aulia Dessy Ramadhani Ayu Safitri Azis Nur Bambang Bagas Santosa Bagus Eko Hardiono Bayu Khrisna Yudhatama Bintang Septiarani Cantika Elistyowati Andanar Chrisna Adhi Suryono Delianis Pringgenies Delianis Pringgenies Diah Ayu Mustofa Diah Permata Wijayanti Dyanita Havshyari Putri Andrykusuma Edi Wibowo Edi Wibowo Kushartono Edy Supriyo Elsa Lusia Agus Endang Sri Susilo Endika Meirawati Fabian Panji Ayodya Hadi Endrawati Hans Arthur Philips Hargo Seno Wahyu Edi Henrian Rizki Pradana Hudanu Hapsara Ibnu Pratikto Ika Ayuningtyas Ika Desie Wulandari Inggrid Debora Hutagaol Iqbal Maulana Irwani Irwani Irwani Irwani Isa Anzori Ita Riniatsih Ita Widowati Jakfar Shodiq Panatar Jufri Ubay Jusup Suprijanto Kathan Joy Abelino Ken Suwartimah Ken Suwartimah Krisiyanto Krisiyanto Kurnia Adi Nusaputro Laras Kinanti Pinandita Lita Tyesta Addy Listya Wardhani Lutfil Hakim Baidhowie M. Amanun Tharieq M. Amanun Tharieq Mas’ad Arif Meutia Shibaa Nadaa Michael Abbey Michael Abbey Monica Virgiana Silvi Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Mustagfirin Mustagfirin Mustagpirin Mustagpirin Nando Arta Gusti Pamungkas Nur Taufiq-Spj Panji Ayodya Parameswari Iccha Nirmalabuddhi Wishnuputri Praressha Wizurai R. Noer Pagripto W Rachellia Rose Nugraha Raden Ario Retno Hartati Retno W. Astuti Ria Azizah Ria Azizah Ria Azizah Tri Nuraini Rina Maharani Iksanti Rindika Wahyu Riska Novianti Putri Robertus Triaji Mahendrajaya Robertus Triaji Mahendrajaya Romadhon Romadhon Rudhi Pribadi Satrio Fahrul Ananda Slamet Suharto, Slamet Sri Sedjati Sri Turni Hartati Sunaryo Sunaryo Surya Fajar Suryono Suryono Widianingsih Widianingsih Widianingsih Widianingsih Yustin Ragil Dewanti

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