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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Indonesian Journal of Geography JOURNAL OF COASTAL DEVELOPMENT ILMU KELAUTAN: Indonesian Journal of Marine Sciences Reaktor Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology International Journal of Science and Engineering (IJSE) Jurnal Pasir Laut Jurnal Ilmu Lingkungan Berkala Perikanan Terubuk Jurnal Pengembangan Energi Nuklir Management of Aquatic Resources Journal (Maquares) Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Kelautan Tropis Acta Aquatica: Aquatic Sciences Journal Jurnal Akuatiklestari Jurnal Penelitian Perikanan Indonesia Bioscientist : Jurnal Ilmiah Biologi
Norma Afiati
Department Of Aquatic Resource Management, Faculty Of Fisheries And Marine Sciences, Diponegoro University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Social Sciences Other

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BIOMASSA KANDUNGAN KARBON DAN SERAPAN CO2 PADA TEGAKAN MANGROVE DI KAWASAN KONSERVASI MANGROVE BEDONO, DEMAK Prakoso, Teguh Budi; Afiati, Norma; Suprapto, Djoko
Management of Aquatic Resources Journal (MAQUARES) Vol 6, No 2 (2017): MAQUARES
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Abstract

ABSTRAKEmisi CO2 yang terakumulasi di atmosfer menyebabkan terjadinya perubahan iklim secara global. Untuk mengurangi dampak perubahan iklim, salah satu upaya yang dapat dilakukan saat ini adalah meningkatkan penyerapan karbon dan/atau menurunkan emisi di atmosfer. Ekosistem mangrove memiliki fungsi ekologis sebagai pereduksi karbon melalui proses sekuestrasi (C-sequestration). Tujuan dari penelitian ini untuk menghitung kerapatan, kandungan karbon dan serapan CO2 serta mengetahui hubungan korelasi kerapatan mangrove dengan kandungan karbon pada tegakan mangrove. Penelitian dilakukan dengan metode non-destructive sampling menggunakan persamaan alometrik. Pendekatan persamaan alometrik yang digunakan yaitu model alometrik biomassa pohon untuk jenis atau tipe ekosistem mangrove yang sudah tersedia atau dikembangkan di lokasi lain. Hasil pengukuran menunjukkan kerapatan tegakan mangrove di area tanam tahun 2004, 2007, dan 2010 adalah 1460 individu/ha, 1868 individu/ha, dan 2128 individu/ha. Biomassa pada area tanam tahun 2004 sebesar 206,77 ton/ha (103,39 ton C/ha, dan menyerap 379,09 ton CO2/ha). Area tanam tahun 2007 memiliki biomassa 293,73 ton/ha (146,86 ton C/ha, dan menyerap 538,50 ton CO2/ha), dan area tanam tahun 2010 memiliki biomassa 260,02 ton/ha (130,01 ton C/ha, dan menyerap 476,67 ton CO2/ha). Berdasarkan hasil penelitian, kerapatan jenis dan umur tegakan mangrove merupakan faktor yang mempengaruhi besarnya biomassa. Hasil uji regresi-korelasi menunjukkan, perubahan kerapatan mangrove akan berpengaruh secara signifikan pada ekosistem mangrove dalam menyimpan karbon dan menyerap CO2 dari atmosfer. Kata Kunci: Mangrove, biomassa, karbon, kerapatan jenis ABSTRACTEmissions of CO2 that accumulated in the atmosphere causes global climate change.  To reduce the impact of climate change, one of the efforts is increased carbon sequestration. The mangrove ecosystem has ecological function as reducing carbon through sequestration process (C-sequestration). Aimed of this research to calculate the density, carbon content and absorption ability CO2 as well as knowing the correlation of mangrove density with carbon sequestration in mangrove. The method used in this research is use non destructive sampling method with allometric equation. The approach allometric equations were used that tree biomass allometric models for the type or types of mangrove ecosystems that are already available or developed in other locations. The measurement results of mangrove density in planting area 2004, 2007 and 2010 were 1,460 individuals/ha, 1868 individuals/ha, and 2128 individuals/ha. Biomass at the planting area in 2004 amounted to 206.77 ton/ha (103.39 ton C/ha, and absorbs 379.09 ton CO2/ha). Planting area in 2007 have biomass 293.73 ton / ha (146.86 ton C/ha, and absorbs 538.50 ton CO2/ha), and the planting area in 2010 have biomass 260.02 ton/ha (130.01 ton C/ha, and absorbs 476.67 ton CO2/ha). Based on the research results, the density of mangrove species and age are factors that influence the amount of tree biomass. The results of regression-correlation analysis showed, if mangrove density change significantly, it can influence the mangrove ecosystem in carbon sequestration and absorb CO2 from the atmosphere. Keywords: Mangrove, biomass, carbon, mangrove density
KELIMPAHAN LARVA IKAN SAAT PASANG DAN SURUT DI PERAIRAN SEKTAR LOKASI WISATA BAHARI DUKUH MOROSARI DESA BEDONO, KABUPATEN DEMAK Rachmawan, Dicky Setya; Afiati, Norma; Widyorini, Niniek
Management of Aquatic Resources Journal (MAQUARES) Vol 7, No 1 (2018): MAQUARES
Publisher : Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1033.575 KB) | DOI: 10.14710/marj.v7i1.22525

Abstract

Perairan Morosari merupakan kawasan pesisir yang memiliki dinamika tinggi akibat dari adanya objek wisata bahari, dimana akan  berpengaruh  pada struktur komunitas sumberdaya perikanan, salah satu diantaranya adalah larva ikan yang ada diperairan tersebut. Larva ikan merupakan fase massa kritis dimulai bagi ikan, dimana pembentukan organ tubuh belum terbentuk secara sempurna. Penelitian ini bertujuan untuk mengetahui jenis dan kelimpahan larva ikan berdasarkan pasang surut yang terdapat di perairan sekitar lokasi wisata bahari Dukuh Morosari Desa Bedono, Kabupaten Demak. Penelitian dilaksanakan pada bulan Juli 2017. Metode penelitian yang digunakan adalah survei dengan penentuan titik sampling secara purposive yang dilakukan di 6 stasiun baik pada saat pasang dan surut. Hasil yang diperoleh menunjukkan bahwa jumlah larva ikan yang tertangkap sebanyak 1156 ind/600m3 terdiri dari 8 famili yakni: Ambassidae (551 ind/600m3), Belonidae (33 ind/600m3), Engraulidae (118 ind/600m3), Gobiidae (8 ind/600m3), Lutjanidae (7 ind/600m3), Mugilidae (130 ind/600m3), Nemipteridae (206 ind/600m3), Oryziatidae (103 ind/600m3). Larva famili Ambassidae merupakan larva yang paling banyak tertangkap, sedangkan larva yang tertangkap dengan jumlah paling sedikit ialah famili Lutjanidae. Hasil uji Independent-Sample T test ialah tidak terdapat perbedaan yang signifikan antara kelimpahan larva ikan saat pasang dan surut pada setiap stasiun maupun setiap pengulangan. Jumlah larva ikan pada saat pasang 613 ind/600m3 dan pada saat surut 543 ind/600m3.  Morosari waters are coastal areas that have high dynamics due to the existence of marine tourism object, which will affect the structure of the fishery resources community, one of which is the fish larvae that existed in these waters. Fish larvae is a critical mass phase begun for fish, where the formation of organs has not been fully formed. This study aims to determine the type and fish larvae abundance based on High Tide and Low Tide at Around Waters Marine Tourism Morosari of Bedono Village, Demak. The research was conducted in July 2017. The research method used a survey with purposive sampling conducted at 6 stations both at High Tide and Low Tide. The results showed that the number of fish larvae caught were 1156 ind/600m3 consisting of 8 families: Ambassidae (551 ind/600m3), Belonidae (33 ind/600m3), Engraulidae (118 ind/600m3), Gobiidae (8 ind/600m3), Lutjanidae (7 ind/600m3), Mugilidae (130 ind/600m3), Nemipteridae (206 ind/600m3), Oryziatidae (103 ind/600m3). The family larvae of Ambassidae are most caught larvae, while the larvae caught with the least amount are the Lutjanidae family. The result of the Independent-Sample T test is no significant different between the abundance of fish larvae during tidal and low tide at each station and every repetition. Number of fish larvae at high tide 613 ind / 600m3 and at low tide 543 ind / 600m3.
KONDISI KUALITAS AIR KOLAM BUDIDAYA DENGAN PENGGUNAAN PROBIOTIK DAN TANPA PROBIOTIK TERHADAP PERTUMBUHAN IKAN LELE SANGKURIANG (Clarias sp) DI CIREBON, JAWA BARAT Pratama, Farizan Adiya; Afiati, Norma; Djunaedi, Ali
Management of Aquatic Resources Journal (MAQUARES) Volume 5, Nomor 1, Tahun 2016
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Abstract

Ikan lele sangkuriang termasuk dalam kelas Pisces dari filum Chordata yang tidak mempunyai sisik, berbentuk memanjang serta licin. Probiotik berasal dari bahasa Yunani pro dan bios yang berarti “untuk kehidupan”. Tujuan penelitian ini adalah untuk mengetahui perbedaan kualitas air dan pengaruh penggunaan probiotik terhadap ikan lele sangkuriang antara kolam yang menggunakan probiotik dan tanpa probiotik. Penelitian ini dilaksanakan pada bulan Juli 2015 di Desa Kertasura dengan Kelompok Tani Kersa Mulya Bakti dan Desa Dukuh dengan Kelompok Tani Mina Mulya Kecamatan Kapetakan Cirebon, Jawa Barat. Metode pengambilan sampel air pada setiap kolam penelitian bersifat metode stratifikasi, yaitu dengan menganggap bahwa perairan memiliki beberapa lapisan atau karakteristik berbeda yang terdiri dari 3 stasiun dengan 2 pengulangan untuk setiap stasiun. Selanjutnya dilakukan pengujian kualitas air meliputi uji oksigen terlarut, amoniak dan asam sulfida. Kemudian pengukuran pertumbuhan ikan lele dengan mengukur panjang dan berat ikan lele. Kolam probiotik memiliki kualitas air yang lebih baik yaitu konsentrasi awal amoniak 0,07 ppm, dengan konsentrasi akhir 0,04 ppm dan konsentrasi H2S awal 0,003 ppm, dengan konsentrasi akhir 0,002 ppm. Pada kolam tanpa probiotik memiliki konsentrasi awal amoniak 0,11 ppm, dengan konsentrasi akhir 0,08 ppm dan konsentrasi awal H2S 0,004 ppm, konsentrasi akhir 0,004 ppm. Pada kolam probiotik pertambahan panjang total ikan (L) 3,2 cm/2 minggu dan pertambahan berat total ikan (W) 16,3/2 minggu gr sedangkan pada kolam tanpa probiotik pertambahan panjang total ikan (L) 1,4 cm/2 minggu dan pertambahan berat total ikan (W) 11,6 gr/2 minggu. Kesimpulan dari penelitian ini adalah kualitas air kolam probiotik lebih baik dari kolam tanpa probiotik. Pengaruh penggunaan probiotik berdampak positif pada ikan lele ditinjau dari pertambahan panjang dan berat.The sangkuriang catfish belongs to class Pisces of the Chordata phylum. The fish has an elongated body without scales. The word probiotic comes from Greek words pro and bios, meaning “for life”. The objective of this study is to investigate the difference of water quality between probiotic pond and non-probiotic pond, and their effect on sangkuriang catfish. The research was conducted on July, 2015 at Kertasura Village with Tani Kersa Mulya Bakti Group and at Dukuh Village with Tani Mina Mulya Grup, Kapetakan District, Cirebon-West Java. The sampling method is the stratification method, which assumes that the waters have multiple layers or different characteristics. The samples were taken on 3 stations with 2 repetition for each station. Hereafter, the water quality analysis includes testing dissolved oxygen, ammonia and hydrogen sulfide, by catfish growth measured from it’s legth and weight. Probiotic pond has a better water quality with the initial ammonia concentration of 0.07 ppm and final ammonia concentration of 0.04 ppm. This pond also has an initial H2S concentration of 0.003 ppm and final H2S concentration of 0.002 ppm. In the non-probiotic pond, the initial ammonia concentration was 0.11 ppm, with final ammonia concentration of 0.08 ppm, and the initial H2S concentration of 0.004 ppm, with final H2S concentration of 0.004 ppm. Growth measured as the total length of fish in probiotic pond (L) was 3.2 cm/2 week and the total weight of fish (W) was 16.3 gr/2 week while on the non-probiotic pond, the total length of fish (L) was 1.4 cm/2 week and the total weight of fish (W) was 11.6 gr/2 week. Thus, the implementation of probiotic has a positive effect to the growth of catfish, as can be seen from the length and weight of the catfish during this study.
Variasi dan Kelimpahan Larva Ikan di Desa Timbulsloko, Kecamatan Sayung, Kabupaten Demak The Variation and Abundance of Fish Larvae In Timbulsloko Village, Sayung Subdistrict, Demak Regency Ramadhan, Faishal; Afiati, Norma; Latifah, Nurul
Management of Aquatic Resources Journal (MAQUARES) Vol 9, No 1 (2020): MAQUARES
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Abstract

ABSTRAK Perairan Timbulsloko merupakan kawasan pesisir yang padat aktivitas manusia, seperti penangkapan ikan dan kegiatan pertambakan, sehingga menyebabkan sumberdaya biota dan larva ikan dapat terganggu. Larva ikan merupakan fase ikan setelah telur menetas, dimana pembentukan organ tubuh belum terbentuk secara sempurna serta masih sangat lemah dan sangat tergantung dengan pergerakan arus. Penelitian ini bertujuan untuk mengetahui komposisi dan jenis serta kelimpahan larva ikan berdasarkan pasang surut yang terdapat di perairan Desa Timbulsloko, Kecamatan Sayung, Kabupaten Demak. Penelitian dilaksanakan pada bulan November sampai Desember 2018. Metode penelitian yang digunakan adalah survei dengan penentuan titik sampling secara purposive sampling yang dilakukan di 5 stasiun baik pada saat pasang dan surut. Hasil yang diperoleh menunjukkan bahwa jumlah larva ikan yang tertangkap sebanyak 1.106 individu terdiri dari 8 famili yakni: Ambassidae (510 individu), Chanidae (60 individu), Engraulidae (49 individu), Gobiidae (59 individu), Leiognathidae (54 individu), Lutjanidae (36 individu), Mugilidae (279 individu), Scatophagidae (59 individu). Larva famili Ambassidae merupakan larva yang paling banyak tertangkap, sedangkan larva yang tertangkap dengan jumlah paling sedikit ialah famili Lutjanidae. Hasil analisis regresi linear berganda didapatkan nilai koefisien korelasi (R) sebesar 0,841 dan koefisien determinasi (R2) sebesar 0,708. Hasil uji Independent-Sample T test tidak terdapat perbedaan yang nyata antara kelimpahan larva ikan saat pasang dan surut pada setiap stasiun maupun setiap pengulangan. Jumlah larva ikan pada saat pasang 600 individudan pada saat surut 506 individu. ABSTRACT Timbulsloko waters is coastal areas that are densely human activity, such as fishing and aquaculture. This activities can give impact to the biota resources and fish larvae. The fish larva is the phase of fish’s life cycle after the eggs hatch. In this phase, the formation of fish's organs is not yet fully formed, weak, and very dependent on the water movement. The objective of this study was to determine the composition, the type and the abundance of fish larvae based on tides that found in the waters of Timbulsloko Village, Sayung District, Demak Regency. This study was conducted from November to December 2018. This study used a survey by determining the sampling points using purposive sampling conducted at 5 stations in the high tide and low tide. The results showed that the number of fish larvae caught were 1.106 individuals consist of 8 families, such as: Ambassidae (510 individuals), Chanidae (60 individuals), Engraulidae (49 individuals), Gobiidae (59 individuals), Leiognathidae (54 individuals), Lutjanidae (36 individuals), Mugilidae (279 individuals), Scatophagidae (59 individuals). Ambassidae family larvae was the most caught larvae, while Lutjanidae family larvae was the least amount caught. The results of multiple linear regression analysis showed that the correlation coefficient (R) was 0,841 and the coefficient of determination (R2) was 0,708. The results of the Independent-Sample T-test showed that there was no significant difference between the abundance of fish larvae in the high tide and low tide from every station and repetition. The number of fish larvae is 600 individuals and 506 individuals in the high tide and low tide, respectively.
Analisis Kelimpahan Bivalvia di Pantai Prawean Bandengan, Jepara berdasarkan Tekstur Sedimen dan Bahan Organik Abundance Analysis of Bivalve in Prawean Beach, Bandengan, Jepara Based on Sediment and Organic Materials Yuliana, Eka Yulfa; Afiati, Norma; Muskananfola, Max Rudolf
Management of Aquatic Resources Journal (MAQUARES) Vol 9, No 1 (2020): MAQUARES
Publisher : Departemen Sumberdaya Akuatik,Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro

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Abstract

ABSTRAK Sedimen dan bahan organik berperan penting dalam kehidupan Bivalvia di lingkungan pantai. Sedimen merupakan tempat untuk menempel dan berjalan organisme, sedangkan bahan organik merupakan sumber nutrien. Karakteristik sedimen akan mempengaruhi morfologi, fungsional, tingkah laku serta nutrien. Penelitian ini dilaksanakan pada bulan Juli 2019 di Pantai Prawean Bandengan, Jepara. Tujuan dari penelitian ini adalah mengetahui kelimpahan dan keanekaragaman Bivalvia, tekstur sedimen dan bahan organik serta hubungan kelimpahan Bivalvia terhadap tekstur sedimen dan bahan organik. Metode yang digunakan yaitu deskriptif dengan teknik purposive  random sampling. Analisis data menggunakan IBM SPSS Statistics 16. Hasil penelitian diperoleh 3 spesies Bivalvia di Pantai Prawean Bandengan yaitu Anadara antiquata, Gafrarium divaricatum dan Gafrarium tumidum dengan kelimpahan individu sebesar 45 ind/100 m2; 29 ind/100 m2 dan 64 ind/100 m2. Keanekaragaman pada stasiun I (d’Season Premiere), II (Julie Hotel), III (tambak), IV (padang lamun) dan V (pemukiman) berkisar 0,76 – 1,01 dengan kategori rendah sampai sedang. Tekstur sedimen pada stasiun I, II, IV dan V yaitu pasir berlempung sedangkan stasiun III yaitu lempung liat berpasir. Kandungan bahan organik sedimen berkisar 3,696 – 7,846% tergolong rendah. Gangguan lingkungan akibat aktivitas manusia dalam memanfaatkan sumber daya alam secara terus menerus dapat mengancam kestabilan komunitas, sebagaimana diperkirakan oleh hasil penelitian ini khususnya dilihat dari komunitas malacofauna (Bivalvia) yaitu keanekaragaman rendah, keseragaman tinggi dan tidak ada spesies yang mendominasi di substrat pasir berlempung yang kandungan bahan organiknya rendah. Hubungan tekstur sedimen dengan Bivalvia fraksi pasir, lumpur dan liat berkorelasi rendah, sedangkan hubungan kandungan bahan organik dengan Bivalvia berkorelasi kuat. ABSTRACT Sediments and organic material have an essential role for grain size Bivalvia's life in the coastal environment. Sediment is a place for attaching and crawling or benthic organisms, while organic material is a source of nutrients. Sediment characteristics will be affected morphology, functional, behaviour and nutrients. This research was conducted in July 2019 at Prawean Bandengan Beach, Jepara. The purpose of this research was to determine the abundance and diversity of Bivalvia, texture of sediments and organic material and the relationship of Bivalvia abundance for texture of sediment and organic material. The method was used the descriptive with a purposive random sampling technique. Data analysis was conducted using IBM SPSS Statistics 16. The results obtained were three species of Bivalves in Prawean Bandengan Beach namely Anadara antiquata, Gafrarium divaricatum and Gafrarium tumidum with an abundance of individuals of 45 ind/100 m2; 29 ind/100 m2 and 64 ind/100 m2. Diversity values at stations I, II, IV and V ranged from 0.76 to 1.01 in the low to moderate categories. Sediment texture at stations I (d’season premiere), II (Julie hotel), III (ponds), IV (seagrass fields) and V (residents) was clay sand while station IIIwas sandy clay loam. The content of organic sediment was around 3.696 – 7.846% with a low category. Environmental disturbances as impact of human activities in utilising natural resources can affect the stability of a community, as predicted by the results of this study, especially seen from the community of malacofauna (Bivalvia),diversity is low, high uniformity and no species that dominate in the sandy substrate that contains low organic matter. The relationship of sediment texture with Bivalvia sand silt and clay fractions were low correlated, while the relationship of organic material content with Bivalvia was strongly correlated. 
RONA AWAL PLANKTON DI PERAIRAN TAPAK PLTN MURIA Norma Afiati; Yarianto Sugeng Budi Susilo; Mauritz L. Tobing; Heni Susiati
Jurnal Pengembangan Energi Nuklir Vol 8, No 2 (2006): Desember 2006
Publisher : Pusat Kajian Sistem Energi Nuklir, Badan Tenaga Nuklir Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jpen.2006.8.2.1972

Abstract

ABSTRAK RONA AWAL PLANKTON DI PERAIRAN TAPAK PLTN MURIA. Rencana pembangunan PLTN diperkirakan mempunyai potensi menimbulkan dampak negatif terhadap ekosistem perairan. Dampak tersebut bersumber dari tahap kegiatan konstruksi dan operasi. Besaran dampak akan sangat tergantung pada kondisi rona awai dibandingkan dengan kondisi setelah terjadi perubahan lingkungan akibat kegiatan proyek. Plankton merupakan organisme yang penting dalam rantai makanan, dan merupakan organisme yang sensitif terhadap perubahan lingkungan. Fitoplankton merupakan produsen, sedangkan zooplankton merupakan konsumen tingkat pertama. Metode yang digunakan untuk penelitian ini adalah sampling acak. Sampel diambil dengan jaring plankton dan pengambilan sampel sedimen dengan Ekman grab sampler. Identifikasi dilakukan dengan mikroskop; individu yang berukuran cukup besar diidentifikasi dengan binokular. Kelimpahan dan indeks keanekaragaman spesies dilakukan berdasarkan rumus Shannon. Hasil penelitian menunjukkan di sekitar rencana PLTN Muria dijumpai 23 jenis fitoplankton, jumlah spesies fitoplankton laut lebih tinggi dibandingkan dengan spesies fitoplankton dari ekosistem sungai, jumlah populasi zooplankton mengikuti kecenderungan populasi fitoplankton. Kata kunci: fitoplankton, zooplankton, kelimpahan, indeks keanekaragaman.   ABSTRACT EXISTING CONDITION OF PLANKTON IN THE WATER BODY OF MURIA NPP SITE. NPP development project is predicted have a potential impact to the water ecosystem. The source of impact is the activities at the both construction and operation stage. The scale of impact will be depending on the existing condition compared to the environmental condition changes after the project activity. Plankton is the organisms that have the significant role in terms of food chain and they are sensitive to the environmental change. Phytoplankton is the food producer in the water ecosystem; meanwhile zooplankton is the first level of consumer. The method used in this work was random sampling. Plankton sampling was using piankton net. Identification for micro-organism used microscope, while for larger organism used binocular. Calculation of abundance and species diversity index used Shannon formula. The result showed that in the vicinity of Ujung Lemahabang Site was found about 23 species of phytoplankton; number of marine phytoplankton was more than that of the fresh water ecosystem, trend of zooplankton population follows phytoplankton trend. Keywords: phytoplankton, zooplankton, abundance, diversity index.
RONA AWAL MAKROBENTOS DI PERAIRAN TAPAK PLTN MURIA Yarianto Sugeng Budi Susilo; Norma Afiati; Mauritz L. Tobing; Heni Susiati
Jurnal Pengembangan Energi Nuklir Vol 9, No 1 (2007): Juni 2007
Publisher : Pusat Kajian Sistem Energi Nuklir, Badan Tenaga Nuklir Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jpen.2007.9.1.1946

Abstract

ABSTRAK Rona Awal Makrobentos di Perairan Tapak PLTN Muria. Rencana pembangunan PLTN diperkirakan mempunyai potensi menimbulkan dampak negatif terhadap ekosistem perairan. Besaran dampak akan sangat tergantung pada kondisi rona awal dibandingkan dengan kondisi setelah terjadi perubahan lingkungan akibat kegiatan proyek. Makrobentos merupakan organisme yang penting dalam rantai makanan. Metode yang digunakan untuk penelitian ini adalah sampling acak. Pengambilan sampel sedimen menggunakan Ekman grab sampler. Identifikasi dilakukan dengan mikroskop; individu yang berukuran cukup besar diidentifikasi dengan binokular. Kelimpahan dan indeks keanekaragaman spesies dilakukan berdasarkan rumus Shannon. Hewan makrobentos yang dijumpai di tapak PLTN pada ekosistem laut adalah Bivalvia, Polychaeta, Anguilla, Echinodermata dan Capitella. Kata kunci: PLTN, rona awal, makrobentos, kelimpahan, indeks keanekaragaman   ABSTRACT Existing Condition of Macrobenthos in the Water Body of Muria NPP Site. NPP development project is predicted have a potential impact to the water ecosystem. The scale of impact will be depending on the existing condition compared to the environmental condition changes after the project activity. Macrobenthos is the organisms that have the significant role in terms of food chain. The method used in this work was random sampling. Macrobenthos sampling was using Ekman grab sampler. Identification for microorganism used microscope, while for larger organism used binocular. Calculation of abundance and species diversity index used Shannon formula. The result showed that the macrobenthos found in the water body near the Ujung Lemahabang NPP site such as Bivalvia, Polychaeta, Anguilla, Echinodermata and Capitella. Keyword: NPP, existing condition, macrobenthos, abundance, diversity index.
HERMAPHRODITISM IN Anadara granosa (L.) and Anadara antiquata (L.) (BIVALVIA: ARCIDAE) FROM CENTRAL JAVA Norma Afiati
JOURNAL OF COASTAL DEVELOPMENT Vol 10, No 3 (2007): Volume 10, Number 3, Year 2007
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

Gonad maturation and sexuality in Central Java populations of A. granosa and A. antiquata were studied by means of macroscopic examination of the visceral mass, microscopic examination of smears of gonadal products and by histological technique. In this study, hermaphrodites occurred extremely rarely, i.e. less than 1.5% for A. granosa and less than 1% for A. antiquata, were observed with both male and female gametes present within the same individual follicles. Unbalanced sex ratios derived from size frequency distribution of the sample revealed that the increased percentage of females with increasing size suggest the occurrence of sequential protandric hermaphrodite with only a single sex change during their life history, i.e. from male to female. The preponderance of juvenile males within the Wedung population should be seen as the advantage of firstly being male, since some energy could be saved and redirected towards somatic growth because in Bivalvia there is a trade-off between growth and reproduction.
GONAD MATURATION OF TWO INTERTIDAL BLOOD CLAMS Anadara granosa (L.) AND Anadara antiquata (L.) (BIVALVIA: ARCIDAE) IN CENTRAL JAVA Norma Afiati
JOURNAL OF COASTAL DEVELOPMENT Vol 10, No 2 (2007): Volume 10, Number 2, Year 2007
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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Abstract

The reproductive cycles of male and female Anadara granosa and Anadara antiquata which have been studied and compared by histological techniques showed great anatomical similarity. Gametogenesis is associated with a system of follicle cells which break down as the gametes approach maturity. The arrangement of follicle cells is characteristics of the sex. In the female, gametogonia are peripheral to the follicle cells, whilst in the male they are interstitial. The process of spermatogenesis parallel the classical vertebrate pattern, i.e. successive layers of spermatogenic cells (spermatogonia, primary and secondary spermatocytes, spermatids, and spermatozoa) occurring more or less regularly in succession toward the centre of the follicle. The diameter of the maximum size oocytes is 75mm for A. granosa and 65mm for A. antiquata. Spawning in both A. granosa and A. antiquata is progressing gradually throughout the year as indicated by the availability of various stages of oogonia and spermatogonia; for which the highest number of oogonia were those of 25-40mm diameter. The histological study indicated that both species are iteroparous with planktotrophic type of development, yet performing a short period of pelagic life (ca 1 month).
Isolasi dan Identifikasi Bakteri Pendegradasi Koprostanol dari Lingkungan Sungai, Muara, dan Perairan Pantai Banjir Kanal Timur Semarang pada Monsun Timur Misbakul Munir; Norma Afiati; Ocky Karna Radjasa; Agus Sabdono; Tonny Bachtiar
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 2 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Abstract

Aktifitas manusia yang terus meningkat di wilayah pesisir, telah menyebabkan terjadinya peningkatan tekanan lingkungan yang berasal dari berbagai macam sumber pencemaran, antara lain limbah industri, pertanian, transportasi, dan limbah domestik. Salah satu sumber pencemar yang cukup dominan di lingkungan perairan pantai adalah pencemaran akibat limbah domestik. Selama ini yang dipakai untuk mengetahui pencemaran lingkungan oleh limbah domestik adalah menggunakan indikator biologi yaitu bakteri coliform. Namunpenggunaan bakteri coliform sebagai indikator pencemaran limbah domestik mempunyai permasalahan antara lain tidak terdeteksinya bakteri coliform tersebut pada perairan pantai, sementara diduga kuat bahwa perairan tersebut tercemar oleh limbah domestik termasuk feces. Oleh karena itu indikator alternatif sangat diperlukan. Salah satu indikator alternatif pencemaran limbah domestik adalah koprostanol, yang mempunyai sifat cukup konservatif, dapat dikuntitatifkan dan dapat dihubungkan dengan sumber pencemar yang spesifik. Namun perlu diingat bahwa di alam, koprostanol mengalami proses degradasi oleh bakteri, sehingga perlu dilakukan penelitian mengenai isolasi dan identifikasi bakteri pendegradasi koprostanol pada lingkungan sungai, muara, dan perairan pantai Banjir Kanal Timur Semarang pada monsun timur. Penelitian dilakukan pada bulan Juli s/d Agustus 2003 pada lingkungan sungai, muara, dan perairan pantai Banjir Kanal TimurSemarang. Isolasi bakteri dari sampel air dan sedimen dilakukan di Laboratorium Mikrobiogenetika, FMIPA Jurusan Biologi UNDIP Semarang dan identifikasi bakteri pendegradasi koprostanol terseleksi dilakukan diLaboratorium Hama dan Penyakit Balai Besar Pengembangan Budidaya Air Payau (BBPBAP) Jepara. Hasil penelitian diperoleh bahwa bakteri pendegradasi koprostanol yang berasal dari lokasi Banjir Kanal TimurSemarang pada berbagai variasi lingkungan dan habitat diperoleh 69 isolat (83,13%) dari 83 isolat yang diuji. Sedangkan hasil identifikasi terhadap 6 isolat terbaik diperoleh 3 (tiga) genus bakteri mampumendegradasi koprostanol, yaitu Achromobacter, Bacillus, dan Branhamella. Dari 3 genus bakteri pendegradasi koprostanol yang didapatkan, ada 2 (dua) genus yang selama ini belum dilaporkan, yaitu genus Achromobacter, dan Branhamella.Kata kunci : Koprostanol, Limbah Domestik, Indikator Pencemar, Isolasi, Identifikasi, BakteriIncreasing human activities in coastal areas have caused an increase of environmental pressures that come from various sources such as industrial disposal, agriculture, transportation, and domestic wastes. One of dominant sources in coastal waters is contamination by domestic wastes. So far to determine environmental contamination by domestic waste is by using biological indicator, coliform bacteria. However the use ofcoliform bacteria have problems for example, they cannot be detected in coastal waters contaminated by domestic waste including faeces. Therefore, an indicator alternative is urgently needed. Alternative indicatorof domestic waste contamination is coprostanol, which is conservative, easy to quantity and related to specific pollutant source. It is important to note coprostanol is naturally degraded by indigenous bacteria.Therefore it is necessary to conduct a study on isolation and identification of coprostanol-degrading bacteria in river, estuarine, and coastal environments of Banjir Kanal Timur Semarang during dry season. The research had been carried out from July to August 2003 at environmental of river, estuarine, and coastal of Banjir Kanal Timur Semarang. Isolation of bacteria from water and sediment samples were conducted atMicrobiogenetics Laboratory, Faculty of Mathematics and Natural Sciences Diponegoro University, meanwhile identificaton of coprostanol-degrading bacteria selected was conducted by at Pest and Diseases Laboratory,Balai Besar Pengembangan Budidaya Air Payau (BBPBAP) Jepara. The result showed that coprostanol-degrading bacteria obtained from Banjir Kanal Timur Semarang at various environments and habitat were 69 bacterial isolates (83,13%) from 83 isolat tested. Identification revealed that (three) genus were found to degrade coprostanol, namely Achromobacter, Bacillus, and Branhamella. From 3 genus of coprostanol-degrading bacteria identified, 2 of them : Achromobacter, and Branhamella have not been reported so far.Key words : Coprostanol, Domestic Waste, Pollution Indicator, Isolation, Identification, Bacteria
Co-Authors . Sumarno Abdul Ghofar Adam Putrarama Suyatno Adriyani Samad Agus Sabdono Ahnan, Muhammad Firhan Maftuh Aji, Fajar Bayu Ali Djunaedi Anggieta, Yayank Dita Anhar Solichin Arif Rahman Arya Ksatria Fernanda Hendrawan Aryansyah, Akbar Atami, Sekar Putri Azis Nur Bambang Bambang Sulardiono Bob Suroso Chiesa, Francesco Te David Nugroho Diah Ayuningrum, Diah Dian Ayu Sapta Nur Utami Dicky Harwanto Djoko Suprapto Fadya Rachmi Puteri Fahmy Barik Farizan Adiya Pratama, Farizan Adiya Febrianto, Sigit Haeruddin Haeruddin Haque, Maharani Zahiratun Helfiana Tiuriska Perangin-angin Heni Susiati Indro Sumantri Indro Sumantri Irwani Irwani Iswanto, M. Fajar Fajar Johannes Hutabarat Khasani, Andro Kholilah, Nenik Lulu Adilla Latifah, Lulu Adilla Lusiana Rahayu Widiastuti Martha Wahyuningrum Mauritz L. Tobing Max Rudolf Muskananfola Max Rudolf Muskananfola Max Rudolf Muskananfola Megawati Arsita Putri Misbakul Munir Muhammad Arkan Zaky Rahman Mulkan Nuzapril Niniek Widyorini Novrizal Soni Riswandha, Novrizal Soni Nur Rochman Nurhuda, Izza Siti nurul latifah Ocky Karna Radjasa Oktavianto Eko Jati Prakoso, Teguh Budi Prijadi Soedarsono Pujiono Wahyu Purnomo Pujiono Wahyu Purnomo Pujiono Wahyu Purnomo, Pujiono Wahyu Purnami, Adelia Puspita, Like Viantika Jala Putra, Muchamad Iqbal Widiansyah Rachmawan, Dicky Setya Rahma, Dwi Aprilia Rahmawati, Laily Agustina Ramadhan, Faishal Retno Hartati Ria Purnama Dewi Sa’diyah, Halimatus Santi, Denita Irma Savitri Taurusiana Setiani, Heny Simangunsong, Erica Siti Rudiyanti Subagiyo Subagiyo Sumarno Sumarno Suradi Wijaya Saputra Surya Dwi Vrananta Sutrisno Anggoro Thomas Triadi Putranto, Thomas Triadi Tonny Bachtiar Ulfah Rismawati, Ulfah Yarianto Sugeng Budi Susilo Yuliana, Eka Yulfa