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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis ILMU KELAUTAN: Indonesian Journal of Marine Sciences BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology METANA Journal of Marine Research Jurnal Harpodon Borneo International Journal of Marine and Aquatic Resource Conservation and Co-existence Jurnal Kelautan Tropis Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Indonesian Journal of Oceanography
Hadi Endrawati
Department Of Marine Science, Faculty Of Fisheries And Marine Science, Diponegoro University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Environmental Science Library & Information Science Other

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Kandungan Lutein Mikroalga Chlorella vulgaris dengan Salinitas Berbeda pada Media Kultur Theresia Claudia Lasmarito; Widianingsih Widianingsih; Hadi Endrawati
Journal of Marine Research Vol 11, No 2 (2022): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v11i2.33819

Abstract

Chlorella vulgaris merupakan mikroalga yang tergolong dalam alga hijau (chlorophyta). C. vulgaris mengandung pigmen karotenoid yang hampir sebagian besar terdiri dari lutein. Hal ini membuat C. vulgaris memiliki keunggulan dibandingkan dengan jenis mikroalga lain. Lutein memiliki manfaat sebagai antioksidan untuk melawan radikal bebas pada mata. Salah satu parameter lingkungan yang mempengaruhi jumlah kandungan lutein adalah salinitas. Penelitian ini bertujuan untuk mengetahui salinitas terbaik guna mengoptimalkan pertumbuhan dan produksi pigmen lutein pada C. vulgaris. Metode yang digunakan adalah eksperimen laboratorium dengan menggunakan Rancangan Acak Lengkap. Mikroalga C. vulgaris di kultivasi dengan tiga taraf perlakuan salinitas yang berbeda yaitu 20, 25, 35 dan 30 ppt (kontrol) dengan tiga ulangan. Pertumbuhan C. vulgaris diamati selama 8 x 24 jam kemudian dipanen untuk perhitungan biomassanya. Biomassa basah hasil kultivasi diekstraksi menggunakan pelarut aseton PA. Ekstrak aseton C. vulgaris kemudian dianalisis kandungan pigmen luteinnya secara spektrofotometri. Kandungan pigmen lutein C. vulgaris tertinggi diproduksi pada salinitas 35 ppt yakni 0.011363 µg/g. Berdasarkan hasil penelitian dapat disimpulkan bahwa perlakuan salinitas berpengaruh secara signifikan terhadap kandungan pigmen lutein C. vulgaris. Chlorella vulgaris is a microalga belonging to the green algae (chlorophyta). C. vulgaris contains carotenoid pigments which consist mostly of lutein. This makes C. vulgaris has advantages compared to other types of microalgae. Lutein has benefits as an antioxidant to fight free radicals in the eyes. One of the environmental parameters that affect the amount of lutein content is salinity. This study aims to determine the best salinity to optimize the growth and production of lutein pigment in C. vulgaris. The method used is a laboratory experiment using a completely randomized design. Microalgae C. vulgaris was cultivated with three different levels of salinity treatment, namely 20, 25, 35 and 30 ppt (control) with three replications. The growth of C. vulgaris was observed for 8 x 24 hours and then harvested for the calculation of its biomass. The wet biomass from the cultivation was extracted using acetone PA as a solvent. The acetone extract of C. vulgaris was then analyzed for its lutein pigment content by spectrophotometry. The highest content of lutein pigment C. vulgaris was produced at a salinity of 35 ppt, namely 0.011363 g/g. Based on the results of the study, it can be concluded that the salinity treatment had a significant effect on the lutein pigment content of C. vulgaris.
Kajian Kelimpahan Zooplankton di Perairan Kartini Kabupaten Jepara Christian Jimmy; Hadi Endrawati; Gunawan Widi Santosa
Journal of Marine Research Vol 12, No 1 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i1.35115

Abstract

Perairan Pantai Kartini dan Muara Wiso merupakan lokasi perairan yang tergolong banyak aktivitas manusia. Zooplankton dalam perairan adalah sebagai konsumen pertama yang memanfaatkan produksi primer yang dihasilkan oleh fitoplankton. Penelitian ini bertujuan untuk mengetahui komposisi, kelimpahan indeks keanekaragaman, indeks keseragaman, dan indeks dominasi pada perairan Pantai Kartini dan Muara Wiso. Metode dalam penelitian ini menggunakan purposive sampling untuk penentuan lokasi dan deskriptif eksploratif. Penelitian ini terbagi menjadi 4 stasiun pada masing-masing lokasi. Pengambilan sampel zooplankton dilakukan secara aktif dengan penarikan secara horizontal. Penelitian ini dilakukan pada bulan Maret 2022. Hasil penelitian ini diperoleh 27 genera zooplankton dengan 4 filum pada Pantai Kartini dan 22 genera dan 3 filum pada Muara Wiso. Kelimpahan zooplankton Pantai Kartini berkisar 85,60 – 437,39 ind/L. Kelimpahan zooplankton pada Muara Wiso sebesar 116,17–250,68 ind/L. Indeks Keanekaragaman zooplankton pada Pantai Kartini menunjukkan nilai 2.06–2.35 dan perairan Muara wiso sebesar 1,18 – 2,16 yang termasuk kategori sedang. Indeks Keseragaman zooplankton Pantai Kartini menunjukkan nilai 0,83–0,95 dan perairan Muara Wiso sebesar 0,73–0,90 termasuk kategori tinggi. Indeks Dominasi zooplankton Pantai Kartini sebesar 0,05 – 0,17 dan perairan Muara Wiso sebesar 0,10 – 0,27 termasuk dalam kategori tidak ada yang mendominasi.  The waters of Kartini Beach and Muara Wiso are water locations that are classified as many human activities. Zooplankton in the waters were the first consumers to benefit from the primary production produced by phytoplankton. This study aims to determine the composition, abundance of diversity indeks, uniformity index, and dominance index in the waters of Kartini Beach and Wiso Estuary. The method in this study used purposive sampling for location determination and exploratory descriptive. This study was divided into 4 stations at each location. Zooplankton sampling is actively carried out by horizontal withdrawal. This research was conducted in March 2022. The results of this study obtained 27 zooplankton genera with 4 phylum’s on Kartini Beach and 22 genera and 3 phylums on the Wiso Estuary. The abundance of zooplankton at Kartini Beach ranges from 85.60–437.39 ind/L. Zooplankton abundance in the Wiso Estuary is 116.17–250.68 ind/L. Zooplankton Diversity Index on Kartini Beach shows a value of 2.06–2.35 and the waters of the Wiso Estuary of 1.18–2.16 which are included in the moderate category. The Kartini Beach zooplankton uniformity index shows a value of 0.83–0.95 and the wiso estuary waters of 0.73–0.90 are included in the high category. The Kartini Beach zooplankton dominance index of 0.05–0.17 and the wiso estuary waters of 0.10–0.27 are included in the category of no one dominates.
Kajian Distribusi Fitoplankton Kaitannya dengan Kesuburan Perairan Pantai Kartini dan Muara Wiso Jepara Azhari Nourma Dewi; Hadi Endrawati; Widianingsih Widianingsih
Journal of Marine Research Vol 12, No 2 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i2.35240

Abstract

Fitoplankton adalah salah satu organisme yang penting dalam kehidupan di laut dan berperan sebagai produktivitas primer. Keberadaan fitoplankton di suatu perairan dapat memberikan informasi mengenai keadaan perairan. Perairan yang memiliki tingkat kesuburan yang baik, akan diindikasikan dengan keberadaan fitoplankton yang melimpah. Salah satu ekosistem perairan yang menjadi habitat fitoplankton adalah perairan Kartini Jepara. Tingkat kesuburan dan kualitas perairan Kartini Jepara dapat diketahui dengan dilakukannya perhitungan kelimpahan dan distribusi fitoplankton yang berkaitan dengan kemerataan fitoplankton. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan dan distribusi fitoplankton di Perairan Pantai Kartini dan Muara Wiso Jepara sehingga dapat memberikan informasi mengenai kesuburan perairan tersebut. Metode penelitian yang digunakan adalah eksploratif dan penentuan lokasi sampling menggunakan metode purposive sampling. Kelimpahan rata-rata fitoplankton pada pantai Kartini adalah 1335,99 sel/L sedangkan pada Muara Wiso adalah 311,18, sehingga keduanya termasuk perairan dengan tingkat kesuburan oligotrofik. Hasil dari penelitian ini menunjukkan bahwa kelas Bacillariophyceae sering ditemukan selama pengamatan. Pola distribusi fitoplankton menunjukkan kategori seragam (uniform) dengan nilai distribusi rata-rata 0,01 pada Perairan Pantai Kartini dan 0,08 pada Perairan Muara Wiso.  Phytoplankton is one type of living creature that is important in life in the ocean and plays a role as primary productivity. The presence of phytoplankton in a body of water can provide information about the state of the waters. Waters that have a good fertility rate, will be indicated by the presence of abundant phytoplankton. One of the aquatic ecosystems that become phytoplankton habitat is Kartini Jepara waters. The level of fertility and water quality of Kartini Jepara can be known by calculating the abundance and distribution of phytoplankton related to the condition of these waters. The purpose of this study was to determine the abundance and distribution of phytoplankton in coastal waters of River Mouth Wiso and Kartini Waters, Jepara and also giving information about the fertility of these waters. The research method used is descriptive analysis and determination of sampling locations using purposive sampling method. The results of this study indicate that the class of Bacillariophyceae is often found during observation. The average abundance of phytoplankton in Kartini Waters is 1335.99 cells/L while in Wiso estuary is 311.18, so both are waters with oligotrophic fertility. Phytoplankton distribution pattern shows uniform category with an average distribution value of 0.01 at Kartini beach and 0.08 at Wiso estuary.
The Composition of Portunus pelagicus on the Fishing Ground Area of Danasari Waters, Pemalang Regency Sri Redjeki; Ria Azizah Tri Nuraini; Hadi Endrawati
Jurnal Kelautan Tropis Vol 26, No 2 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/potensi.%Y.18825

Abstract

Blue swimming crab (Portunus pelagicus) is one of the most economically valuable marine products in Indonesia. The crabs productivity was generally still dependent on the population in the wild. Danasari Village is one of the main crab producers in Pemalang Regency. The daily fishing crab activities by fisherman direct an impact on decreasing of the natural crabs resources. This study determined the crabs composition in the fishing ground where usually spotted by the Danasari crab fisherman. This research obtained the information of a composition of female and male crabs, carapace width distribution, growth characterized, and the egg-berried female number. This study conducted on May to July 2022. The result in this research was a male crabs were dominated than females. The carapace width was generally amount 92-112 mm, while the growth characteristic of blue swimming crabs was negative allometric. The female crab gonad maturity was dominated by 2nd level gonad maturity, while the egg-berried female crabs were found 21 crabs totaled from 14 spot fishing grounds. Based on the carapace width distribution, there are a lot of blue swimming crab with undersized in shallow-depth fishing sites, while the crab size mostly above 100 mm already found at each spot in this research. The highest egg-berried female percentage was found at spot 7th and 13rd, where the female crabs at 7th spot were bigger carapace than at 13rd spot areas. These results indicated that crab resources in Danasari Waters and surround area were indicated potentially overfished, proven with undersized berried-female crabs. The management efforts will conduct an environmentally friendly fishing gear, regarding the policy of ministry regulating as to keep crab resources sustainable. In addition, scheduling rules for fishing activities can also be tested to be applied.
Kadar Pigmen Klorofil dan Karotenoid pada Nannochloropsis sp. dengan Perlakuan Penyinaran Ultraviolet Julia Fransiska; Sri Sedjati; Hadi Endrawati
Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v12i3.42285

Abstract

Nannochloropsis sp. merupakan fitoplankton dengan kemampuan memproduksi pigmen klorofil-a, b, dan karotenoid yang berperan dalam fotosintesis. Produksi pigmen Nannochloropsis sp. dipengaruhi utama oleh faktor cahaya. Pemberian sinar UV berpotensi memberikan rangsangan terhadap fitoplankton pada pertumbuhan sel dan produksi pigmen. Penelitian ini bertujuan untuk menentukan upaya yang sesuai untuk peningkatan kadar klorofil dan karotenoid Nannochloropsis sp. menggunakan perlakuan sinar UV.  Rancangan penelitian melalui Rancangan Acak Lengkap (RAL) dengan tiga kali pengulangan. Perlakuan sinar UV yang diberikan meliputi 4 kelompok yaitu; 0 (kontrol), 10, 20, dan 30 menit. Pengamatan kualitas air pada media dan perhitungan kepadatan sel dilakukan setiap hari hingga masing-masing kultur mencapai fase stasioner untuk pemanenan. Kadar pigmen klorofil-a, b, dan karotenoid ditentukan menggunakan metode spektrofotometri dan diuji secara statistika melalui ANOVA One Way. Hasil penelitian didapatkan bahwa kepadatan sel tertinggi terdapat pada kelompok pemberian sinar UV 10 menit sebesar 1017,714x105 sel/mL pada fase stasioner hari ke-24. Kadar pigmen klorofil-a tertinggi pada kelompok sinar UV 20 menit, yaitu sebesar 108,46 µg/g berat basah, klorofil-b tertinggi pada kelompok UV 30 menit, yaitu sebesar 32,93 µg/g berat basah, dan karotenoid tertinggi pada kelompok UV 10 menit, yaitu sebesar 147,88 µg/g berat basah. Namun, berdasarkan uji statistika pemberian sinar UV sampai 30 menit tidak memberi pengaruh nyata (p≥0,05) terhadap kadar klorofil-a,b, dan karotenoid yang dihasilkan.  Nannochloropsis sp. is a phytoplankton with the ability to produce chlorophyll-a, b, and carotenoid pigments that are useful for photosynthesis. Pigment production of Nannochloropsis sp. is influenced mainly by the light factor. The treatment of UV light has the potential to stimulate phytoplankton cell growth and pigment production. This study aims to determine the appropriate efforts to increase levels of chlorophyll and carotenoids Nannochloropsis sp. using UV light treatment. The research design was through a completely randomized design (CRD) with three repetitions. UV light treatment given includes 4 levels, namely; 0 (control), 10, 20, and 30 minutes. Observation of media water quality and cell density calculations were carried out every day until each culture reached a stationary phase for harvesting. The levels of chlorophyll-a, b, and carotenoid pigments were determined using the spectrophotometric method and statistically tested through One Way ANOVA. The results showed that the highest cell density was found at the 10-minute UV light level of 1017,714x105 cells/mL on the stationary phase on the 24th day. The highest levels of chlorophyll-a were at the UV light level of 20 minutes, which was 108.46 µg/g wet weight, the highest chlorophyll-b was at the UV level of 30 minutes, which was 32.93 µg/g  wet weight, and the highest carotenoids were at the UV 10 level. minutes, which is 147.88 µg/g wet weight. However, based on statistical tests, UV light up to 30 minutes did not have a significant effect (p≥0.05) on the levels of chlorophyll-a, b, and carotenoids produced.
Bioakumulasi Logam Berat Pb oleh Chlorella vulgaris Altysia Putriany; Widianingsih Widianingsih; Hadi Endrawati; Retno Hartati
Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v12i3.39205

Abstract

Usaha untuk menghilangkan logam berat merupakan suatu proses pengolahan air limbah yang sangat penting. Beberapa metode telah dilakukan baik dengan metode kimia maupun fisika, namun perlakuan secara biologi dianggap lebih murah dan aefektif.  Chlorella vulgaris merupakan salah satu jenis mikroalga yang mempunyai kemampuan menyerap dan menghilangkan logam berat seperti timbal (Pb) di air limbah.  Penelitian ini bertujuan untuk mengetahui pengaruh logam berat timbal (Pb) pada media pemeliharaan yang berbeda terhadap pertumbuhan dan bioakumulasinya pada C. vulgaris. . Metode eksperimen laboratorium dengan lima perlakuan konsentrasi logam berat timbal (Pb) pada media budidaya C vulgaris yang berbeda, yaitu 0, 25, 50, 75, dan 100 ppm. Setiap perlakuan dengan tiga ulanga. Mikroalga C. vulgaris dikultur selama 7 hari dan pada akhir penelitian kepadatannya dihitung dan kandungan Pbnya dianalisa dengan menggunakan Atomic Absorption SpectrophotometerHasil penelitian menunjukkan bahwa semakin tinggi konsentrasi Pb pada media, semakin menghambat pertumbuhan C. vulgaris. C. vulgaris mampu mengakumulasi logam Pb dengan efisiensi penyerapannya sebesar 0,34% pada konsentrasi 100 ppm. Analisis varian memperlihatkan konsentrasi Pb memberikan pengaruh yang nyata (p<0,05) pada pertumbuhan, dan kemampuan akumulasi Pb pada C. vulgaris.  In the wastewater treatment process, the removal of heavy metals is very important. The process has applied various chemical and physical methods, and the biological method is believed to be the most efficient and cheapest.  Chlorella vulgaris is one species of microalgae that has ability to absorb and accumulate heavy metals such as lead (Pb). Chlorella can grow in extreme environments and withstand outside influences, better than other types of microalgae. This study aims to determine the influence of lead (Pb) in the culture media on the growth and bioaccumulation of C. vulgaris. The laboratory experiment method was applied with several Pb concentrations in the culture media of C. vulgaris, i.e. 0, 25, 50, 75, and 100 ppm. The treatments were triplicated. The C. vulgaris was cultured for seven days, and in the end of the experiment, the density was counted, and the Pb was analyzed using Atomic Absorption Spectrophotometer The results showed that the higher concentrations of Pb in the culture media gave the most inhibiting growth of C. vulgaris. C. vulgaris accumulate Pb at a concentration of 100 ppm in the culture media with an absorption efficiency of 0.34%. It revealed that the difference in Pb concentration give significant effect (p<0.05) on the growth and Pb accumulation capability of C. vulgaris.
Kajian Komposisi Ukuran Rajungan Betina (Portunus pelagicus) di Fishing Ground Perairan Pemalang Ria Azizah Tri Nuraini; Sri Redjeki; Hadi Endrawati; M. Amanun Tharieq
Buletin Oseanografi Marina Vol 12, No 3 (2023): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v12i3.51276

Abstract

Rajungan betina memiliki peranan penting dalam keberlanjutan stok sumber daya rajungan di alam. Maraknya rajungan betina yang masih ditangkap oleh nelayan menjadi salah satu ancaman besar terhadap keberlanjutan sumber daya rajungan. Tujuan penelitian ini untuk mengetahui komposisi rajungan betina berdasarkan kelas lebar karapas, hubungan lebar karapas dan berat tubuh, komposisi tingkat kematangan gonad (TKG), nilai fekunditas dan persentase egg berried female (EBF) pada 20 titik area fishing ground yang dilaksanakan selama bulan Mei – Agustus 2022 di perairan Pemalang. Pengambilan sampel dan penentuan titik fishing ground dilakukan secara purposive sampling dengan menyesuaikan area penangkapan nelayan rajungan Desa Danasari, Pemalang. Distribusi ukuran lebar karapas rajungan menunjukkan modus kelas lebar karapas pada 101 – 110 mm, dimana kondisi tersebut tergolong kurang baik mengingat ukuran minimum rajungan yang boleh ditangkap adalah >100 mm. Hubungan lebar karapas dan berat tubuh menunjukkan pertumbuhan rajungan betina bersifat allometrik negatif, yang berarti pertambahan lebar karapas lebih cepat dibandingkan pertambahan berat tubuh. Komposisi TKG rajungan betina didominasi pada kondisi kematangan tingkat 2 (TKG 2) dengan persentase 78%. Nilai fekunditas rajungan betina bertelur dengan rata-rata pada kisaran 301.202±131.949 butir telur. Nilai EBF tertinggi ditemukan pada titik 12 dengan persentase 1,09% dengan rajungan betina bertelur sebanyak 7 ekor. Keberadaan rajungan betina di perairan menjadi salah satu faktor kunci keberlanjutan sumber daya rajungan, sehingga diharapkan dapat dijadikan acuan dalam penentuan area perlindungan dan kawasan potensial reproduksi rajungan di perairan Pemalang dan perairan lainnya. Female blue swimming crabs have an important role in the sustainability of crab populations of natural resources. The large number of female crabs that are still caught by fishermen is one of the major threats to the sustainability of crab resources. The purpose of this study was to determine the composition of female crab based on carapace width class, carapace width and body weight relationship, composition of gonad maturity level (TKG), fecundity value and percentage of egg berried female (EBF) at 20 spots of fishing ground area during May - August 2022 in Pemalang waters. Sampling and selection of fishing ground points were carried out by purposive sampling by adjusting the fishing area of crab fishermen in Danasari Village, Pemalang Regency. The distribution of carapace width size of crab showed the mode of carapace width class at 101 - 110 mm, where the condition is not quite good considering the minimum size of crab that can be caught is >100 mm. The relationship between carapace width and body weight shows that the growth of female crabs is negative allometric, which means that the increase in carapace width is faster than the increase in body weight. The TKG composition of female crabs is dominated by the condition of 2nd maturity level (TKG 2) with a percentage of 78%. The fecundity value of egg laying female crabs with an average in the range of 301,202±131,949 eggs. The highest EBF value was found at spot 12 with a percentage of 1,09%, with the number of egg berried female crabs are 7 individuals. The presence of female crabs in the waters is one of the key factors for the sustainability of crab resources, so it is expected to be used as a reference in determining protection and potential reproduction areas of blue swimming crabs in Pemalang waters and other waters.
Environmental Characteristic of Phyllophorus sp. (Echinodermata, Holothuroidea, Phyllophoridae) Habitat in the Madura Strait, Indonesia Widianingsih Widianingsih; Retno Hartati; Hadi Endrawati
Jurnal Kelautan Tropis Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i3.15064

Abstract

Information on the environmental characteristics of many sea cucumber habitat is limited, despite these species exhibiting rapid exploitation and may lead to depletion. The present study combined a survey on many seawaters and sediment characteristics of habitat valuable aspidochirote holothurian, Sea Ball Cucumber, Phyllophorus sp. to compare with location with no sea cucumber in Madura Strait, Indonesia. Data from detailed surveys were used to compare both locations with measures of physical and chemical seawater parameters including temperature, salinity, dissolved oxygen, pH, phosphate, nitrate, ammonia, chlorophyll-a, total suspended solids, light transparency, and depth of water. The comparison was also carried out on physical and chemical parameters of surface sediment, i.e. phosphate, nitrate, ammonia, chlorophyll-a, grain size, total organic matter, and carbon-organic content. The data then were analyzed using Mann-Whitney U-Non Parametric Test with SPSS v. 16.  The result revealed that there were significant differences between sediment characteristics of Sea Ball Cucumber habitat and no Sea Ball cucumber location, but not for seawater. Seawater parameter value in Madura Strait showed in the range required for its life. This analyzes proved the importance of sediment characteristics for Phyllophorus sp. As benthic deposit feeders, they did not only utilize substrate underneath the body for its habitat but also primarily to supply their natural food. 
Komposisi Hasil Tangkapan Utama Rajungan dan Tangkapan Samping Nelayan Desa Danasari, Pemalang Hadi Endrawati; Sri Redjeki; Ria Azizah Tri Nuraini; M. Amanun Tharieq
Jurnal Kelautan Tropis Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i3.20141

Abstract

Crab fishing activities using various fishing gears have the potential to catch other types of biota as known as bycatch. This type of bycatch is generally still used either for sale or for personal consumption, but some are re-released again. This research aims to determine the composition of the main catch and bycatch obtained by crab fishermen from Danasari Village, Pemalang. The research was carried out from July to August 2022. The data collection method was purposive sampling by going out to sea with fishermen to crab fishing grounds. The composition of the main catch and bycatch obtained at crab fishing locations consists of 1 type of main catch and 21 types of bycatch. The composition of the blue swimming crab is dominated by male crabs with a ratio of 1:0.7, with a mode of carapace width that is larger than female crabs, namely 107-115 mm. The proportion of bycatch obtained was only 25.73% from the total catch, with the useable bycatch amount more than the discarded bycatch. The ecological index shows that the value of species diversity and evenness is in the medium category with a value of 2.114 and 0.6944, while the dominance value is in the low category with a value of 0.1703. Useable bycatches that are commonly found are Orastoquilla oratoria, Scylla sp., and Babylonia spirata. The percentage of main catch is higher than bycatch, which indicates that fishing activities are still environmentally friendly, but the use of bycatch needs to be increased. It is hoped that data on the composition of bycatch types from Danasari Village fishermen can provide information on the potential of marine products other than crab, or could be said to be another alternative as a catch target to reduce exploitation of blue swimming crab resources. Aktivitas penangkapan perikanan rajungan dengan berbagai alat tangkap memiliki potensi terdapat jenis tangkapan biota lain atau disebut sebagai tangkapan samping. Jenis tangkapan samping (bycatch) umumnya tetap dimanfaatkan baik untuk dijual maupun sebagai konsumsi pribadi, namun ada juga yang dilepas kembali. Penelitian ini bertujuan untuk mengetahui komposisi tangkapan utama dan tangkapan samping yang didapatkan oleh nelayan rajungan dari Desa Danasari, Pemalang. Penelitian dilaksanakan selama bulan Juli sampai dengan Agustus 2022. Metode pengambilan data secara purposive sampling, yaitu ikut pergi melaut dengan nelayan ke lokasi penangkapan rajungan. Komposisi jenis tangkapan utama dan tangkapan samping yang didapatkan di lokasi penangkapan rajungan terdiri atas 1 jenis tangkapan utama dan 21 jenis tangkapan samping. Komposisi tangkapan utama rajungan didominasi oleh rajungan jantan dengan rasio 1:0,7, dengan modus ukuran lebar karapas yang lebih besar dibanding rajungan betina yaitu 107-115 mm. Proporsi tangkapan samping yang didapatkan hanya sebesar 25,73% dari total tangkapan keseluruhan, dengan jumlah tangkapan samping bernilai ekonomi lebih banyak dibandingan yang terbuang. Indeks ekologi menunjukkan nilai keanekaragaman dan keseragaman jenis termasuk kategori sedang dengan nilai 2,114 dan 0,6944, sedangkan nilai dominansi termasuk kategori rendah dengan nilai 0,1703. Tangkapan samping bernilai ekonomi (useable bycatch) yang umum ditemukan yaitu Orastoquilla oratoria, Scylla sp., dan Babylonia spirata. Persentase hasil tangkapan utama lebih tinggi dibandingkan tangkapan samping yang mengindikasikan aktivitas perikanan yang masih ramah lingkungan, namun pemanfaatan bycatch perlu untuk ditingkatkan. Data komposisi jenis tangkapan samping dari nelayan Desa Danasari diharapkan dapat menjadi informasi potensi hasil laut selain rajungan, atau bisa dikatakan sebagai alternatif lain sebagai target tangkapan untuk mengurangi eksploitasi sumberdaya rajungan. Crab fishing activities using various fishing gears have the potential to catch other types of biota as known as bycatch. Thistype of bycatch is generally still used either for sale or for personal consumption, but some are re-released again. This researchaims to determine the composition of the main catch and bycatch obtained by crab fishermen from Danasari Village,Pemalang. The research was carried out from July to August 2022. The data collection method was purposive sampling bygoing out to sea with fishermen to crab fishing grounds. The composition of the main catch and bycatch obtained at crabfishing locations consists of 1 type of main catch and 21 types of bycatch. The composition of the blue swimming crab isdominated by male crabs with a ratio of 1:0.7, with a mode of carapace width that is larger than female crabs, namely 107115mm.Theproportionofbycatchobtainedwasonly25.73%fromthetotalcatch,withtheuseablebycatchamountmorethanthediscardedbycatch.Theecologicalindexshowsthatthevalueofspeciesdiversityandevennessisinthemediumcategorywithavalueof2.114and0.6944,whilethedominancevalueisinthelowcategorywithavalueof0.1703.UseablebycatchesthatarecommonlyfoundareOrastoquillaoratoria,Scyllasp.,andBabyloniaspirata.Thepercentageofmaincatchishigherthanbycatch,whichindicatesthatfishingactivitiesarestillenvironmentallyfriendly,buttheuseofbycatchneedstobeincreased.ItishopedthatdataonthecompositionofbycatchtypesfromDanasariVillagefishermencanprovideinformationonthepotentialofmarineproductsotherthancrab,orcouldbesaidtobeanotheralternativeasacatchtargettoreduceexploitationofblueswimmingcrabresources.Keywords:Non-targetSpecies,Diversity,Evenness,Dominance,Discard Abstrak Aktivitas penangkapan perikanan rajungan dengan berbagai alat tangkap memiliki potensi terdapat jenis tangkapan biotalain atau disebut sebagai tangkapan samping. Jenis tangkapan samping (bycatch) umumnya tetap dimanfaatkan baikuntuk dijual maupun sebagai konsumsi pribadi, namun ada juga yang dilepas kembali. Penelitian ini bertujuan untukmengetahui komposisi tangkapan utama dan tangkapan samping yang didapatkan oleh nelayan rajungan dari DesaDanasari, Pemalang. Penelitian dilaksanakan selama bulan Juli sampai dengan Agustus 2022. Metode pengambilan datasecara purposive sampling, yaitu ikut pergi melaut dengan nelayan ke lokasi penangkapan rajungan. Komposisi jenistangkapan utama dan tangkapan samping yang didapatkan di lokasi penangkapan rajungan terdiri atas 1 jenis tangkapanutama dan 21 jenis tangkapan samping. Komposisi tangkapan utama rajungan didominasi oleh rajungan jantan denganrasio 1:0,7, dengan modus ukuran lebar karapas yang lebih besar dibanding rajungan betina yaitu 107-115 mm. Proporsitangkapan samping yang didapatkan hanya sebesar 25,73% dari total tangkapan keseluruhan, dengan jumlah tangkapansamping bernilai ekonomi lebih banyak dibandingan yang terbuang. Indeks ekologi menunjukkan nilai keanekaragamandan keseragaman jenis termasuk kategori sedang dengan nilai 2,114 dan 0,6944, sedangkan nilai dominansi termasukkategori rendah dengan nilai 0,1703. Tangkapan samping bernilai ekonomi (useable bycatch) yang umum ditemukan yaituOrastoquilla oratoria, Scylla sp., dan Babylonia spirata. Persentase hasil tangkapan utama lebih tinggi dibandingkantangkapan samping yang mengindikasikan aktivitas perikanan yang masih ramah lingkungan, namun pemanfaatan bycatchperlu untuk ditingkatkan. Data komposisi jenis tangkapan samping dari nelayan Desa Danasari diharapkan dapat menjadiinformasi potensi hasil laut selain rajungan, atau bisa dikatakan sebagai alternatif lain sebagai target tangkapan untukmengurangi eksploitasi sumberdaya rajungan. 
Analisis Konsentrasi Nitrat Dan Fosfat Terhadap Kelimpahan Fitoplankton Di Perairan Sengkarang Pekalongan Dzakwan, Ardhatama Zafron; Endrawati, Hadi; Ario, Raden
Journal of Marine Research Vol 12, No 4 (2023): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v12i4.35259

Abstract

Peran penting nitrat dan fosfat sangat berpengaruh sekali terhadap pertumbuhan dan perkembangan biota yang ada di laut. Kedua nutrien ini sangat dibutuhkan dalam pembentukan  sel jaringan pada organisme laut maupun proses fotosintesis yang terjadi pada organisme seperti fitoplankton. Salah satu parameter biologi yang erat kaitanya dengan nutrien seperti nitrat dan fosfat yaitu fitoplankton. Tingkat kelimpahan dari fitoplankton dapat dipengaruhi oleh konsentrasi nitrat fosfat yang ada di perairan tersebut. Adapun tujuan dilakukanya kajian mengenai konsentrasi nitrat dan fosfat dengan kelimpahan fitoplankton yaitu untuk mengetahui konsentrasi nitrat dan fosfat kaitanya dengan kelimpahan fitoplankton yang berada di perairan Sengkarang. Konsentrasi nitrat memiliki kisaran antara 0,001-0,118 mg/L. Stasiun 1 memiliki konsentrasi nitrat yang berkisar antara 0,022-0,118 mg/L. Stasiun 2 memiliki konsentrasi nitrat 0,001 mg/L pada semua titik. Stasiun 3 memiliki konsentrasi nitrat 0,001 mg/L  pada semua titik. Konsentrasi Fosfat di perairan Sengkarang Pekalongan berkisar antara 0,002-0,005 mg/L. Stasiun 1 memiliki konsentrasi fosfat yang berkisar antara 0,003-0,005 mg/L. Stasiun 2 memiliki konsentrasi fosfat yang berkisar antara 0,002-0,004 mg/L. Stasiun 3 memiliki konsentrasi fosfat yang berkisar antara 0,002-0,004 mg/L. Kelimpahan fitoplankton dengan hasil yang terendah yaitu pada stasiun 1 sebesar 561,5349 ind/L. Kemudian hasil kelimpahan tertinggi yaitu pada stasiun  2 sebesar 2246,1394 ind/L dan pada stasiun 3 yaitu sebesar 655,1240 ind/L. Keberadaan nitrat dan fosfat di perairan Sengkarang dapat dikatakan tidak signifikan berpengaruh terhadap fitoplankton karena nilai korelasi (r) sebesar 0,403 untuk nitrat dan 0,271 untuk fosfat.The important role of nitrates and phosphates is very influential on the growth and development of biota in the sea. Both of these nutrients are needed in the formation of tissue cells in marine organisms and the photosynthesis process that occurs in organisms such as phytoplankton. One biological parameter that is closely related to nutrients such as nitrates and phosphates is phytoplankton. The level abundance of phytoplankton can be influenced by the concentration of nitrate phosphate present in these waters. The purpose of the study on the concentration of nitrate and phosphate with an abundance of phytoplankton is to determine the concentration of nitrate and phosphate associated with the abundance of phytoplankton in the water of Sengkarang. Nitrate concentration has a range between 0.001-0.118 mg/L. Station 1 has nitrate concentrations ranging from 0.022-0.118 mg/L. Station 2 had a nitrate concentration of 0.001 mg/L at all points. Station 3 had a nitrate concentration of 0.001 mg / L at all points. Phosphate concentration in the waters of Sengkarang Pekalongan ranged from 0.002-0.005 mg/L. Station 1 has a phosphate concentration that ranges from 0.003-0.005 mg/L. Station 2 has a phosphate concentration that ranges from 0.002-0.004 mg/L. Station 3 has a phosphate concentration that ranges from 0.002-0.004 mg/L. Phytoplankton abundance with the lowest yield at Station 1 of 561.5349 ind/L. Then the highest abundance results are at Station 2 of 2246.1394 ind/L and at Station 3 of 655.1240 ind / L. The presence of nitrate and phosphate in Sengkarang waters can be said to have no significant effect on phytoplankton because the correlation value (r) of 0.403 for nitrate and 0.271 for phosphate.
Co-Authors AB Susanto Abdino Putra Utama Adi Santoso Agus Indarjo Agus Sabdono Agus Subagio Aini, Firly Nur Altysia Putriany Ambariyanto Ambariyanto Anandita, Assifa Yusan Anantya Setya Perdana Andreas Nur Hidayat Anindya Wirasatriya Annisa Fadillah Antik Erlina Antonius Budi Susanto Ardita Elok Mahendra Putri Ardyatma, Via Jeanieta Berliana Argina Dewi S Aris Ismanto Arrosyd, Muhammad Azam Assifa Yusan Anandita Azhari Nourma Dewi Azis Rifai Azizi, Muhammad Faris Baidhowie, Lutfil Hakim Baskoro Rochaddi Bifa Aulia Manuhuwa Budhy Wiyarsih Cannavaro, Syahrial Varrel Cantik Sitta Devayani Cantika Elistyowati Andanar Chandra Nicolas Sihaloho Chrismanola, Verena Chrisna Adhi Suryono Christian Jimmy Christin Manulang Cristiana Manullang Cristiana Manullang Delianis Pringgenies Desy Lasri Ana Dewi Nugrayani Dinda Monita Dwi Saniscara Wati Dyahruri Sanjayasari Dzakwan, Ardhatama Zafron Endang Kusdiyantini Endang Supriyantini Evi Lutfiyani Fadhel Muhammad Juharna Fauzan, Rianda Febrianto, Sigit Febriyantoro Febriyantoro Firil, Nis Aura Sadida Frijona Fabiola Lokollo Gentur Handoyo Gunawan Widi Santosa Handhikka Daffa Wira Pradhana Hermin P Kusumaningrum Hermin Pancasakti Kusumaningrum Heryoso Setiyono Hilal M Hilyati Fajrina Ibnu Pratikto Ida Noventalia Ida Noventalia Imam Misbach Indras Marhaendrajaya Ira Kolaya, Ira Irwani Irwani Irwanto, Eko Ita Riniatsih Ita Widowati Ivan Riza Maulana Jihadi, Muhammad Shulhan Julia Fransiska Ken Suwartimah Kiki Pebli Ningrum Kirana, Nadia Astrid Lilik Maslukah Linda Imroatun Nita Lutfil Hakim Baidhowie M. Amanun Tharieq Maharani, Galung Dhiva Manuhuwa, Bifa Aulia Maulana Cahya Widhiatmoko Monita, Dinda Muhamad Ravian Wiraputra Muhammad Iskandar Zulkarnain Muhammad Muallifin Nor Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Muhammad Zainuri Mumtaz, Fathiyah Ningrum, Kiki Pebli Nirwani Soenardjo Nis Aura Sadida Firil Nor, Muhammad Muallifin Nugrayani, Dewi Nugroho Agus D Nur Taufiq Nur Taufiq Nur Taufiq SPJ Nur Taufiq-Spj Nurul Latifah Octo Zainul Ahmad Perdana, Anantya Setya Pradhana, Handhikka Daffa Wira Primaswatantri Permata Putri Sakinah Mayani, Putri Sakinah Putri, Ardita Elok Mahendra Raden Ario Rahma Nimas Healthy Jayanti Raka Pramulo Sophianto Rana Hadi Shafani Ranny Ramadhani Yuneni Retno Hartati Ria Azizah Ria Azizah Ria Azizah Ria Azizah Tri Nuraini Rianda Fauzan Robertus Triaji Mahendrajaya Robertus Triaji Mahendrajaya Rodhiyah Patmawati Rose Dewi Rose Dewi Rose Dewi Rudhi Pribadi Sabna Suryaningtias Sihaloho, Chandra Nicolas Sophianto, Raka Pramulo Sri Amini Sri Redjeki Sri Redjeki Sri Sedjati Sri Sedjati Sugeng Widada Sugiyanto, Nenden Rose Sunaryo Sunaryo Sunaryo Sunaryo Suryani, Oda Gracia Ariela Suryanti - Suryono Suryono Susilo Dwi Cahyanti, Susilo Dwi Sutrisno Anggoro Syahrial Varrel Cannavaro Taufiq-Spj, Nur Theresia Claudia Lasmarito Tiara Finishia, Tiara Titik Mariyati Tjahjo Winanto Tony Hadibarata, Tony Utama, Abdino Putra Valentina R Iriani Valmay Savira Verena Chrismanola Via Jeanieta Berliana Ardyatma W.L. Saputra Widhiatmoko, Maulana Cahya Widianingsih Widianingsih Widianingsih Widianingsih Widya Paramudhita Wilis Ari Setyati Wiraputra, Muhamad Ravian Yopie Anggara Putra, Yopie Anggara Yuniar Andri Sulistiyanto Yuniar Andri Sulistiyanto Yuvita Muliastuti Zhulian Hikmah Hasibuan