Hadi Endrawati
Jurusan Ilmu Kelautan, Fakultas Perikanan dan Ilmu Kelautan, Universitas Diponegoro Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia. 50275

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Konsumsi Harian Copepoda terhadap Pakan Chlorella sp. pada Volume Media Kultivasi yang Berbeda Zaenuri, Muhammad; Endrawati, Hadi; Kusdiyantini, Endang; Kusumaningrum, Hermin Pancasakti
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 13, No 3 (2008): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Penelitian ini bertujuan untuk mengetahui konsumsi harian copepoda terhadap Chlorella sp. pada volume media kultivasi yang berbeda. Penelitian ini dilaksanakan dari Mei hingga Oktober 2005 di Laboratorium Biologi Oseanografi UNDIP. Copepoda diambil per bulan dari bulan Mei hingga Oktober 2005 di Perairan Demak. Chlorella sp. digunakan sebagai pakan copepoda, berasal dari Balai Besar Pengembangan Budidaya Air Payau (BBPBAP) Jepara, dengan densitas 15.200 sel/mL. Kultivasi copepoda menggunakan 3 beker 2 L dengan densitas awal 100 ind./L dan 3 akuarium 20 L dengan densitas awal 1000 ind./L. Pengamatan konsumsi harian copepoda terhadap Chlorella sp. dilakukan per 3 jam dari pukul 06.00 sampai 18.00. Perioda kultivasi diulang per bulan selama 6 bulan. Parameter suhu, salinitas, DO dan pH diamati setiap hari. Konsumsi rata-rata copepoda terhadap Chlorella sp. menunjukkan 19,05- 140,47 sel/mL/jam pada media 2 L dan 10,69—102,06 sel/mL/jam pada media 20 L. Model konsumsi copepoda terhadap Chlorella sp. menunjukkan fluktuasi dengan puncak yang berbeda pada Mei-Juli 2005, namun mempunyai pola yang sama pada perioda Agustus-Oktober 2005.Kata kunci : Copepoda, Konsumsi Harian, Chlorella sp.The aim of the research is to know the daily consumption of the copepod on Chlorella sp. cultivated in the different volume of media. The research was conducted from May to October 2005 at Laboratory of BiologicalOceanography, Diponegoro University. Copepods were collected monthly from Demak waters. The copepod cultivations were done using 3 bekers of 2 L and 3 aquariums of 20 L. A stocking density of 100 ind./L ofcopepod for 2 l media and 1000 ind. / l of copepod for 20 l media were used as tests biota per period of cultivation. Chlorella sp. from Balai Besar Pengembangan Budidaya Air Payau (BBPBAP) Jepara were givento copepod with density of 15.200 cell/mL. The daily copepod consumption from 06.00–18.00 was observed at 3 hours intervals. The observations were replied monthly for six month. The temperature, salinity, DO and pH were measured daily. The average daily consumption of copepod on Chlorella sp. cultivated in 2 l anad 20 L media were 19,05–140,47 cell/mL and 10,69–102.,6 cell/ml, respectively. The daily consumption of copepod reveal a fluctuated model with differents peak of the consumption during the May – July 2005, while the one of the August – October 2005 show the same model.Key words : Copepods, Daily Consumption, Chlorella sp
Struktur Komunitas Copepoda di Perairan Jepara Endrawati, Hadi; Zainuri, Muhammad; Kusdiyantini, Endang; Kusumaningrum, Hermin P
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 12, No 4 (2007): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Abstract

Copepoda merupakan komponen terbesar dari zooplankton di laut dan berperan sebagai produser sekunder serta konsumer. Berdasarkan perannya dalam jaring-jaring makanan, maka komunitas copepoda pada suatu perairan dapat digunakan untuk menilai produktivitas perairan. Penelitian ini bertujuan untuk mengetahui struktur komunitas copepoda di perairan Jepara. Penelitian ini dilaksanakan dari April hingga Desember 2005 di perairan Jepara dan identifikasi dilakukan di Laboratorium Biologi Oseanografi UNDIP. Enam stasiun untuk pengambilan sampel yang dilakukan sebulan sekali. Pengambilan sampel copepoda dilakukan dengan planktonnet 100 mm, dengan menyaring air sebanyak 1 m3 secara vertikal dari dasar perairan. Sampel yang diperoleh diawetkan dengan formalin 4% untuk diidentifikasi di laboratorium. Keanekaragam, keseragaman dan dominansi dianalisa untuk mengetahui struktur komunitas copepoda. Pengukuran parameter kualitas air yang meliputi suhu, salinitas pH, arus dan kecerahan dilakukan secara bersamaan dengan pengambilan sampel. HasiI penelitian di perairan Jepara terdapat3 ordodan 18 genus copepoda, yaitu Ordo Calanoida (13 genus), Cyclopoida (2 genus) dan Harpacticoida (3 genus). Kelimpahan copepoda di perairan Jepara sebesar 5 - 546 ind/l, dengan rata-rata 316 ± 85, keanekaragaman 2,3259-2,3594, keseragaman 0,80 - 0,81 dan terdapat dominansi Acartia sp dan Calanus sp. Kata kuncl: Copepoda, Struktur Populasi, Jepara The dominantion ofcopepod in the zooplankton community, play an important role as secondary producer and primary consumer in the sea food web. Due to this function, the copepod population can be use as the sea water productivity. The aim of the research is to know and copepod community structure at Jepara Waters. The research was conducted from April to December 2005 at the Jepara Wafers and the samples were identified at Laboratory of Biological Oceanography, UNDIP. There were six stations established as the research site area. Monthly sampling was done. Copepod were collected using the 100 mm plankton net, by filtering a total of 1 m3 sea water taken vertically. The samples were preserved by the addition of formaldehyde 4% and identified in the laboratory. The diversity, evenness and dominance index were calculated to describe the copepod community structure. The water quality such as temperature, salinity, pH, current and transparency, were observed in the same time. There were 18 genus of copepods determined at the Jepara waters, belong to 3 ordo i.e Calanoid (13 genus), Cydopoid (2 genus) and Harpacticoid (3 genus). Copepod density at Jepara water was 5-546 ind./l, (average 316 ± 85), diversity 2,3259-2,3594, eveness 0,8047-0,8163 and dominancy 0,1837-0,1953. Acartia sp and Calanus sp. were dominant in Jepara waters identified. Key words : Copepods, Population Structure, Jepara
Pengaruh Kepadatan Terhadap Tingkat Kematangan Gonad dan Fekunditas Kepiting Bakau (Scylla serrata) pada Kultivasi di Tambak Garam Endrawati, Hadi; Zainuri, Muhammad; Suryono, Chrisna A; Suryono, Suryono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 4 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Penelitian ini bertujuan untuk mengetahui kematangan gonad dan fekunditas kepiting bakau (Scylla serrata) dengan sistem kultivasi dalam karamba di tambak garam berdasarkan perlakuan kepadatan benih yangberbeda.Benih kepiting berjumlah 144 ekor dengan berat awal rata-rata 250 gram, terbagi kedalam empat perlakuan kepadatan, masing masing A ( 6 ekor ), B ( 8 ekor ), C ( 10 ekor ) dan D ( 12 ekor ), yang masing– masing diulang empat kali dipelihara dalam karamba berukuran 1 x 0,75 x 1 meter. Pemeliharaan dilakukan selama 2 minggu ( 8 – 23 Oktober 2001 ). Hasil pengamatan kematangan gonad berdasarkan dianalisis berdasarkan Indeks Kematangan Gonad serta fekunditas. Kematangan gonad kepiting bakau Scylla serrata tercapai secara merata dengan indeks berkisar diantara 42.87 – 68.70, dengan indeks tertinggi sebesar 65.12 ± 2.39 pada perlakuan C ( kepadatan 10 ekor per 0.75 m 2 ). Sedangkan fekunditas berkisar diantara 60000 –120000 butir telur, dengan perlakuan tertinggi dicapai pada perlakuan B dengan kisaran jumlah telur 96000 – 120000 dan nilai rata – rata 110000 ± 12000 butir telur. Hubungan berat kepiting dengan fekunditas total Y = 567.9562 – 103477.337 X ( r = 0.7966 ). Fekunditas memberikan hasil linier menurun berdasarkan perlakuan dikarenakan kemampuan toleransi serta ruang gerak yang terlalu sempit dan persainganKata kunci : kepadatan, kematangan gonad, fekunditas, kepiting Scylla serrata.The aim of the research is to know the effect of different density on the gonad maturity and fecundity of mud crab ( Scylla serrata ) grown in the cage. This cage were put in salt water pond. Four treatments (density ), i.e. A ( 6 individual ), B ( 8 individual ), C ( 10 individual ) and D ( 12 individual ), with four replications, were applied. The average initial weight of the mud crab is 250 gram. These were grown for two weeks ( October 8 to 23, 2001 ). The mud crab gonad maturity and fecundity was analysed using the analysis based on the Gonad Maturation Index and Fecundity. The gonad maturity was found for almost of mud crab Scylla serrata. The gonad maturity index showed a value from 42.87 – 68.70, which the highest was reached by the treatment C ( with the density 10 individual per 0.75 m 2 ). The fecundity varies from 60000 –120000 eggs, which the highest was 110000 ± 12000 and reached by the treatment B ( with the density 10 individual per 0.75 m 2 ). The relationship between mudgrab weight and fecundity was Y = 567.9562 – 103477.337 X (r = 0.7966). The fecundity showed a decreased linierity due to the limitationspace cause by the level of density.Key words : density, gonad maturation, fecundity, mud crab Scylla serrata
Kajian Nutritif Phytoplankton Pakan Alami pada Sistem Kultivasi Massal Erlina, Antik; Amini, Sri; Endrawati, Hadi; Zainuri, Muhamad
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 9, No 4 (2004): Jurnal Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

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Potensi fitoplankton sebagai pakan alami bagi biota laut di derajat tropic diatasnya telah diketahui. Selanjutnya upaya kultivasi secara massal dilakukan untuk pemenuhan kebutuhan hatchery. Penelitian ini bertujuan untuk mengetahui nilai nutrisi pakan alami Skeletonema costatum, Thallassiosiera sp, Chlorella sp. dan Chaetoceros calcitrans dari hasil produksi kultivasi massal. Laboratorioum Alga Pakan Alami, Balai Besar Pengembangan Budidaya Air Payau Jepara. Isolate 5 ml dari setiap jenis fitoplankton digunakan sebagai sumber pada kultivasi dengan media gallon 20 liter selama 15 hari atau sampai dengan tercapainya puncak populasi. Transfer ke media 1 ton dilakukan setelah puncak populasi tersebut. Kedua jenis media memanfaatkan pupuk dari formula Conwy. Densitas fitoplankton diamati setiap hari dengan menggunakan haemocytometer. Setelah tercapai puncak populasi, maka fitoplankton akan dipanen dengan menyaringnya dengan 2 μm. Hasil panendigunakan untuk analisis nutrisi. Kandungan nutrisi fitoplankton menunjukkan kisaran nilai protein : 21.85 – 37 % ; lemak : 2.41 – 10 % dan karbohidrat : 17 – 21 %. Sedangkan asam lemak menunjukkan kisaran nilai yang cukup tinggi, khususnya pada omega 3 : 0.911 – 3.738 % ; omega 6 : 15.591 – 38.002 % dan omega 9 : 0.292–15.112 %. Nilai nutrisi tersebut tidak berbeda dengan kultivasi laboratoris.Kata kunci : Kandungan Nutritif, Alga, Skeletonema costatum, Thallassiosiera sp, Chlorella sp,. Chaetoceros calcitrans, Kultivasi Massal.The potential mean of the phytoplankton as natural feed for higher tropic level biota in the sea is already known. While the study to mass cultivation as the requirement for natural feed of marine biota larvae wasalready develop in the hatchery, and need to explore into mass cultivation for an alternative purpose. The aim of the study is to determine the nutrition contents of four type phytoplankton, Skeletonema costatum,Thallassiosiera sp, Chlorella sp. and Chaetoceros calcitrans based on mass cultivation. The research was conducted in the Laboratory of Natural Food, Brackishwater Aquaculture Development and Research Center,Jepara. The 5 ml isolate of each phytoplankton were cultivate in the 20 litter gallon for 15 days or until the reach of the density. After the peak density of every phytoplankton, it will transfer into 1 ton media. Eachtreatment was three replicate. Each approach using the enrichment media based on Conwy formula. The density was daily monitor using haemocytometer. After the reach of peak population density, the algae was filtered using 2 μm screen. The algae then store in the refrigerator for nutritive determination. The average nutritive content in the algae show a range value of protein : 21.85 – 37 % ; lipid : 2.41 – 10 % andcarbohydrate : 17 – 21 %. While the lipid acid show a high range value, especially for omega 3 : 0.911 – 3.738 % ; omega 6 : 15.591 – 38.002 % aand omega 9 : 0.292 – 15.112 %. The nutritive value is notdifferent than the one of laboratory cultivation.Key words : Nutritive Contents, Algae, Skeletonema costatum, Thallassiosiera sp, Chlorella sp,. Chaetoceros calcitrans, mass cultivation.
KAJIAN KADAR TOTAL LIPID DAN KEPADATAN NITZSCHIA SP. YANG DIKULTUR DENGAN SALINITAS YANG BERBEDA Widianingsih, Widianingsih; Hartati, Retno; Endrawati, Hadi; M, Hilal
METANA Vol 7, No 01 (2011): Volume 7, No. 01 Juli 2011
Publisher : METANA

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Penelitian ini bertujuan untuk mempelajari kadar total lipid dan kepadatan pada mikroalga Nitzschia sp. Penelitian ini menggunakan rancangan acak lengkap dengan  perlakuan salinitas 15, 20, 25, 30, dan 35 ppt (3 kali ulangan). . Nitzschia sp. dikultur pada skala laboratorium dengan pupuk F/2 dan dilakukan pemanenan setelah mencapai fase stasioner untuk kemudian diukur kadar total lipid.   Perlakuan salinitas menunjukkan bahwa rata-rata kepadatan Nitzschia sp. tertinggi pada salinitas 20 ppt (37,32 x 106 sel/mL) dan rata-rata kepadatan terendah pada salinitas 30 ppt 1(8,62 x106 sel/mL).  Berdasarkan hasil pengamatan diperoleh nilai rata-rata persentase kadar total lipid tertinggi terdapat pada salinitas 35 ppt (71,51 ± 5,35 %-dw) dan persentase rata-rata kadar total lipid terendah terdapat pada salinitas 15 ppt (13,26 ± 0.47 %-dw). Dari hasil penelitian dapat disimpulkan bahwa Nitzschia sp. dapat tumbuh pada salinitas 15 – 35 ppt dengan kepadatan tertinggi pada salinitas 20 ppt dan rata- rata persentase kadar total lipid tertinggi pada salinitas 30 ppt. Kata-kata kunci: Nitzschia sp., densitas, salinitas, kadar total lipid.
A MASS-BALANCE TROPHIC FLOW MODEL AT AWUR BAY IN THE NORTHERN CENTRAL JAVA SEA Zainuri, Muhammad; Endrawati, Hadi
JOURNAL OF COASTAL DEVELOPMENT Vol 3, No 1 (1999): Volume 3 Number 1 Year 1999
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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A mass-balance trophic flow model is constructed using a simple model termed ECOPATH. The model is applied to an ecosystem at Awur bay, Jepara in the northern central Java sea. The model constructed was built based on twelve components of the ecosystem, which were partitioned into groups of similar species and provide for these species groups, estimates of production biomass, diet and food consumption. Three tropic level of the components were clearly presented in the model. A number of the estimates mean biomass was 3922.054 gC.m-2.yr-1, while net primary production was 78439.48 gC.m-2.yr-1, over 115 ha area at Awur bay, northern coast of Central Java.
THE ABUNDANCE OF ZOOPLANKTON AS SECONDARY PRODUCER AT AWUR BAY IN THE NORTHERN CENTRAL JAVA SEA Endrawati, Hadi; Zainuri, Muhammad; ., Hariyadi
JOURNAL OF COASTAL DEVELOPMENT Vol 4, No 1 (2000): Volume 4, Number 1, 2000
Publisher : JOURNAL OF COASTAL DEVELOPMENT

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The diversity of zooplankton {as Secondary Producer) were observed at seagrass, mangrove and coral reef area at Awur Bay, in Jepara Waters. The observation were made fom August, 13 to September, 10, 2000, atfour daibr intervals : at 09.00 A.M., 12.00 noon ,3.00 P.M. and 6,00 PM. The zooplankton abundance at the seagrass area are 33 73—6497 individuals/ml with an average of 5329 individuals/ml , at the mangrove area 4132»5970 individuals/mg with an average of 5177 individuals/mj , and at the coral reef area 3061-4079 with average of 3599 individuals/ml. The zooplankton di}ersity at the seagrass area are 2,1594»2,2917, with an average of 2,2289, at the mangrove area 2, 0925»2,4962 with an average cf 2,5130 and at the coral reefarea 1,9227- 2,1181 with an average of 2,0306 On the basis of the zooplankton abundance and diversity at seagrasr, mangrove and coral reef area of the Awur Bay, the averages at the Jepara Waters can be regarded as an indicator of marine productivity. The three locations observed displays a direct interre lation as the habitat of zooplankton.
Struktur Komunitas Zooplankton di Perairan Morosari, Kecamatan Sayung, Kabupaten Demak Noventalia, Ida; Endrawati, Hadi; Zainuri, Muhammad
Journal of Marine Research Vol 1, No 1 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

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Morosari waters is an area with high dynamics due to rob or high tide phenomenon, which affects the community structure of zooplankton in the waters. The purpose of this study was to investigate community structure of Zooplankton around Morosari waters, Sayung District, Demak Regency. This research was conducted in the Morosari waters, Sayung District, Demak Regency. This study uses an exploratory method with data collection methods using the Sample Survey Method. Three location were stablished for this research namely Location 1 is a Morosari river estuary area, Location 2 is an area of aquaculture, Location 3 is a Pandansari river estuary area. Samples were taken 5 times, during early July to early October 2011 using a planktonnet with 45 μm mesh size, sampling was done vertical sampling and horizontal sampling. The results of this study showed 41 genera for the vertical, and 45 genera for the horizontally. Average abundance obtained by the observation station was 18,40 ind/l for the vertical, and 4,80 ind/l for the horizontal. Index zooplankton diversity showed medium and obtained the average gain by the station is 2,44 for the vertical and 2,59 for the horizontally. Uniformity index indicates the type of high uniformity and obtained the average by the station is 0,87 for the vertical, and 0,80 for the horizontal. Dominance index obtained average based on the observation station is 0,12 for the vertical, and 0,31 for the horizontal.
Struktur Komunitas Fitoplankton Di Perairan Morosari Kecamatan Sayung Kabupaten Demak Fajrina, Hilyati; Endrawati, Hadi; Zainuri, Muhammad
Journal of Marine Research Vol 2, No 1 (2013): Journal of Marine Research
Publisher : Journal of Marine Research

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Morosari waters located in Sayung District, Demak Regency is waters area where there is a mixture of land and sea water. Settlement activity, aquaculture, industrial land and existing at the entry and exit activities of fishing boats around the estuary can contribute to the dynamics of water quality fluctuations and productivity. The dynamics of water quality that occur greatly affect community structure and distribution of phytoplankton in the waters. The results of this study showed 28 genera for the vertical method, while for the method of horizontally obtained 31 genera. Average abundance obtained by the observation station was 1087.09 cells/l with vertical method, while for the horizontal method obtained 884.69 cells/l. While the abundances obtained by times of sampling average of 1087.09 cells/l for the vertical method, while for the horizontal method was 831.38 cells/l. Index phytoplankton diversity showed medium and obtained the average gain by the station is 2.02 for method of vertical and horizontally method to obtain 1.85. While based on the sampling time obtained an average of 2.09 for the vertical method, and for the horizontal method is 1.58. Uniformity index indicates the type of high uniformity and obtained the average by the station is 0.68 for the vertical method, while the horizontal method is obtained 0.4. While the sampling time is obtained based average of 0.64 for the vertical method, while for the horizontal method is 0.51. Dominance index obtained average based on the observation station is 0.3 for the vertical method, while the horizontal method obtained 0.6. While the sampling time is obtained based on an average of 0.35 for the vertical method, where for the horizontal method is 0.48 which indicates there is no dominating genus.
Densitas dan Kandungan Total Lipid Mikroalga Spirulina platensis Yang Dikultur pada Tingkatan Perbedaan Fotoperiod Manullang, Cristiana; Widianingsih, Widianingsih; Endrawati, Hadi
Journal of Marine Research Vol 1, No 1 (2012): Journal of Marine Research
Publisher : Journal of Marine Research

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Spirulina platensis is belong to divisi of Cyanophyta which has ability for good adaption in fluctuativ condition where environment factors can influent the composisition of nutrion (lipid, protein, carbohydrate). Lipid has function for fatty acid resources, vitamins and for bioenergy resources. This research aims to know influence of photoperiod with density and total lipid microalga Spirulina platensis which is has been cultured in different photoperiod as a purpose. This research uses complete random plan and treatment of photoperiod 4 hours light 20 hours dark, 8 hours ligth 16 hours dark, 12 hours light 12 hours dark, 24 hours light. The results shows that the highest density of S.platensis on experiment 24 hours light is 1591± 16 x 103 sinusoidal/mL and lowest density on photoperiod 4 hours light 20 hours dark 1087 ± 62 x 103 sinusoidal/mL while higest total lipid amount presentation of lipid on photoperiod 4 hours light 20 hours dark 46,08 ±27,93 %-dw and the total lipid 24 hours light treatment is 24,76 ±5,23 %-dw.