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Toksisitas Ekstrak Metanol Spirulina sp terhadap nauplii Artemia sp.

BULETIN OSEANOGRAFI MARINA Vol 1, No 1 (2011): Vol 1, No.1, Oktober 2011
Publisher : BULETIN OSEANOGRAFI MARINA

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Abstract

Abstract BSLT (Brine Shrimp Lethality Test) was conducted on crude ectract of Spirulina sp. The extraction was done by added methanol solution. The Spirulina extract tested to newly hatched Artemia  sp. nauplii. The objective of this study was to analize the mortality of the nauplii dan to determine the LC50-24h level. The result showed that the bioactive compound of Spirulina sp had a high toxicity level (LC50-24h: 113.2 ppm). It can be concluded that this specific microalgae had a potential source of medicine.   Keywords: Spirulina sp, BSLT,crude extract.

Analisis Kelayakan Investasi Pada Budidaya Karamba Jala Apung (KJA) Ikan Kerapu Di Kepulauan Karimunjawa Kabupaten Jepara

BULETIN OSEANOGRAFI MARINA Vol 6, No 2 (2017): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

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Abstract

Kajian Investasi budidaya ikan kerapu di Karimunjawa adalah salah satu usaha guna menumbuhkan promosi investasi di wilayah studi. Kajian ini akan membuat peluang investasi menjadi lebih fokus dan tajam baik dari segi sektor maupun lokasinya, sehingga akan memudahkan investor guna merealisasikan rencana bisnisnya. Studi ini akan memberikan detail informasi kepada investor tentang peluang bisnis pada budidaya ikan kerapu yang sangat layak dilakukan sehingga dapat meningkatkan pertumbuhan ekonomi masyarakat pesisir dan wilayah kabupaten Jepara pada umumnya. Metode yang digunakan adalah metode survei. Peluang Investasi dianalisa secara deskriptif. Hasil kajian menunjukan bahwa berdasakan potensi alam, fasilitas infrastruktur produksi, nilai ekonomi serta aspek financial maka kelayakan investasi adalah sangat prospektif dan berpeluang untuk sukses. Analisis financial menunjukan bahwa investasi pada budidaya ikan kerapu di Karimunjawa adalah sangat layak untukdirealisasikan bagi investor. Budidaya ikan kerapu Tikus (Cromileptis altivelis)adalah paling prospektif, dimana nilai Net Present Value (NPV)> 0,yaitu  1,772,764,729,  dan  Profitability Index  (PI) lebih besar dari  1, yaitu 5,543291036.  Payback Periodadalah  2.82 tahun, jika tidak mempertimbangkan nilai uang (Discount Factors) dan 3.65 tahun  jika mempertimbangkan nilai uang. Sedangkan untuk budidaya ikan kerapu bebek(Ephinephelus fuscoguttatus), Net Present Value (NPV)> 0 yaitu  69,938,924, - dan Profitability Index (PI) lebih besar dari 1, yaitu 1,20558783.  (Pay Back Period) adalah  4,13tahun apabila tidak mempertimbangkan nilai uang (Discount Factor), sedangkan apabila mempertimbangkan nilai uang maka menjadi  and 4.64 tahun. Dari analisis yang dilakukan, maka dapat disimpulkan bahwa meskipun kedua spesies ikan kerapu layak investasi, tetapi ikan kerapu tikuspaling layak investasi, sedangkan ikan kerapu macansebagai produk sampingan investasi, yaitu dengan memanfaatkan sisa pakan yang tidak digunakan dalam budidaya ikan kerapu tikus, sehingga hasilnya akan dapat maksimal. Keseluruhan aspek yang dikaji menunjukan bahwa budiddaya ikan kerapu di Kepulauan Karimunjawa adalah layak investasi. The study of feasibility floating cage culture of grouper fish investment in Karimunjawa is one of the efforts for investment promotion in the studied region. This study will make the investment opportunities become more focus and sharp, both sectoral and location, so it will be easier for investors to execute their investment interest. The purpose of this study, is to provide initial information for investors about business opportunities of grouper fish farming as a very feasible investment opportunities so that can boost the economy of the region and the society of Jepara Regency. The method used in this study was survey  method, descriptive analysiswas conducted to see a of investment opportunities. Based on potential natural resources, location, infrastructure facilities, production, economy value, and financial aspect, the  results of study concluded  that the overall investment is highly prospective and has a fairly high chance to success. The financial analysis showed that investment in grouper fish cultivation in jepara regency is very feasible as a business investment for the investors. Humpback or Polka dot grouper (Cromileptis altivelis) culture is highly prospective and has a fairly high chance. This can be seen from the Net Present Value (NPV) > 0 is equal to 1,772,764,729,  and Profitability Index  (PI) value greater than 1, which is 5,543291036.  While the longer the period the funds invested will return (Payback Period) is 2.82 years if the without considering the time value of money (Discount Factors) and 3.65 years when considering the time value of money. Whereas,  for Brown marbled grouper (Ephinephelus fuscoguttatus), the Net Present Value (NPV) > 0 is equal to  69,938,924, - and Profitability Index (PI) greater than 1, which is 1,20558783. While the longer  period the funds invested will return (Pay Back Period) are 4,13 year if without considering the time value of money (Discount Factors) and 4.64 years when considering the time value of money. From the analysis it can be concluded that all these choices on the investment plan is feasible to run and prospective advantageous. While the best option is an investment plan on investments Humback or Polka Dot grouper (Cromileptis altivelis) cultivation, Brown marbled grouper (Ephinephelus fuscoguttatus) culture whereas it is only a sideline activity and only utilize food wastes are left, so the whole will be able to deliver optimal results in grouper culture.All examined aspects of Grouper cultivation in karimunjawa  gave results that investment activity  is able to be executed. The financial analysis shows that investment in grouper fish cultivation in jepara regency is very feasible to be a business investment for the investors.

Co-Authors AB Susanto Achmad Widodo Adi Priyo Wicaksono, Adi Priyo Agung Chandra Prasetya Agung Nugroho Setiawan, Agung Nugroho Agus Indarjo Agus Sulistiyo Agus Suyanto Agus Syafrudin Agus Triyanto Ahmad Syaify, Ahmad Aini Moeljono, Aini AL. Supartinah, AL. Andika Bagus Setiawan, Andika Bagus Andri Wahyu Septo Putra Anifatur Nurjannah, Anifatur Arbiyanti, Yossi Norma Arfian, Finty Ari Anshori, Ari Ari Suwondo Arief Suseno, Arief Arif Syaifuddin Arifin Budi Putro, Arifin Budi Arinianzah, Aldo Rizqi Aris Wijayanti Arista, Desi Arlien Siswanti Arnefia Mei Yusnida Asfan Muqtadir, Asfan Astuti, Anjar Ave Gierdo Alfaseno, Ave Gierdo Baliyan I, Baliyan Bambang Nugraha, Bambang Basuki Basuki Bayu Surarso Budi Setiawan Chrisna A Suryono Chrisna Adhi Suryono Cicilia Artitin Cynthia Damayanti Dadang Sukandar Dayyana, Surya Desi Sandra Sari Desie Dwi Wisudanti, Desie Dwi Dewi Agustina Dewi Sulistyaningrum Dhidik Prastiyanto Diana Layla Dimas Putra Anugrah, Dimas Putra Djoko Adi Widodo Donny Prasetyo Santoso, Donny Prasetyo Drajat Martianto Dwi Puji Adiana, Dwi Puji Edi Wibowo Edi Wibowo Kushartono Edy Junaidi Eka Miftakhul Jannah, Eka Miftakhul Eko Supraptono Emi Agustina, Emi Endah Setiyaningrum Endang Sri Susilo ENNY SUSWATI Ervia Yudiati Evi Setiawati Fatekurohman, Mohamat fatimah Fatimah Febriana Tirta Kirana, Febriana Tirta Fitri Mahardika Sari Frida Fallo Gatot Murti Wibowo, Gatot Murti Gatot Yulianto Gentur Handoyo Gigih Budhiawan Gunawan Widi Santosa Hadi Endrawati Harindra W Pradhana, Harindra W Harindra Wisnu Pradhana Haryati Haryati Hayat Maulana Heri Sugito Heri Sutanto Hernita Kusuma Wardani Hery Sulistyo JNS, Hery Sulistyo Hery Widijanto Hidayat, Syarief Thaufik Hilmi Trian Setyawan Indhana Sudiharto, Indhana Indri Trifiantari Irianiwati Irianiwati Irwani Irwani Isa Nurnusanto, Isa Isnaini Isnaini Ivan Nurizal Sakti Izah, Luluk Lailatul Jatmiko Endro Suseno Jauhari Syamsiyah Joko Winarno Juniyanto, Dimas Kamasita, Systriana Esi Kartini Sinaga Kesawa Sudarsih Khanif Pramusinto, Khanif Kharis, Muhamad Kusworo Adi Kusworowulan, Suryati Kwartarini Murdiastuti, Kwartarini Laela Meitasari, Laela Laska, Yulinda Lukman Hakim Mahda Veronika Maisi, Sri Malau, Rotua Mardiyono Mardiyono Margo Utomo Marsetyawan HNES, Marsetyawan Mediawati, Saskia Mefi Priba Sari, Mefi Priba Melo, Gabriella Imanuella Melyana Nurul Widyawati Menur Wahyu Pangestika, Menur Wahyu Mohamad Nadhif, Mohamad Muh. Yusuf Muhammad Arif Prasetyo Muhammad Arsyad Suyuti Muhammad Izzuddin Shofar Muhammad Zainuri Mujiyo Mujiyo Mulyanto Mulyanto Munarso Munarso Muthoifin Muthoifin, Muthoifin N. Euis Sutaningsih, N. Euis Nailatul Ilmi Nasronudin Nasronudin Niharul Annas Nirwani Soenardjo Nourobby Aulada, Nourobby Oky Dwi Nurhayati Oky Yuripa Pradana P. H, Aditya Praptiwi Praptiwi Prasetyo Nugroho Raden Ario Radini Sinta, Radini Ragil Saputra Rahayu Sapta S Rahmat Gernowo Rakhmat Syaefullah Ramadhan, Hazbina Fauqi Rani Gamawati, Rani Ratna Dwi Meilani, Ratna Dwi Retno Handayani Retno Hartati Ria Amitasari Ria Azizah Rieneke L Sela, Rieneke L Rini Riyanti Robby Eko Christanto Rudhi Pri, Rudhi Rudhi Pribadi Rusdi, Muh Sangkertadi Sangkertadi Satryo Adi Wibowo, Satryo Adi Setyaningsih, Erni Sharfina Sharfina, Sharfina Siti Fatimah Muis Soeharyo Hadisaputro Sri Budi Barunawati, Sri Budi Sri Huning Anwariningsih Sri Kusumastuti, Sri Sri Sedjati Sri Sukamta Sudadi Sudadi Sudibyo Sudibyo Sugeng Purbawanto Sugiyanto Sugiyanto Sukarnen Sukarnen, Sukarnen Sulistyo Warjono, Sulistyo Sumarno Sumarno Sumaryo Sumaryo Suntoro Suntoro Supriyanto Supriyanto Supriyati Supriyati Suroyo Suroyo Suwarto Suwarto Tatyantoro Andrasto Tika Retnowati Tri Saputra, Tri Valentino, Nico Vifaldi Agti, Vifaldi Vincensius Gunawan Wahyu Fredi Santoso Wahyu Setia Budi Widyatmani Sih Dewi Wilis Ari Setyati Yosafat Hermawan Trinugraha, Yosafat Hermawan Yudha Nurdian, Yudha Yuli Hermansyah, Yuli Yuningtyastuti, Gita Surya