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All Journal Torani Journal of Fisheries and Marine Science Jurnal Bahan Alam Terbarukan Maspari Journal
Dwi Fajriyati Inaku, Dwi Fajriyati
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Environmental Science Materials Science & Nanotechnology Social Sciences

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THE EFFECT OF TEMPERATURE AND NITRATE COMPOUND ON GROWTH, BIOMASS AND FREE FATTY ACID CONTENT ON MICROALGAE CULTURE OF Spirulina sp. and Skeletonema sp. Rukminasari, Nita; Lukman, Muhammad; Tambaru, Rahmadi; Inaku, Dwi Fajriyati; Suharto, Suharto
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.8513

Abstract

Temperature and availability nutrients played an important role on growth and lipid production of microalgae.  In this study, we examined the effect of increasing suhu and excessed and depleted NO3 on growth rate, biomass and free fatty acid concentration in the Spirulina sp and Skeletonema sp. Two microalgae were culture on Conway and Milne media for 21 days using continuous culture technique.  There were four temperature treatments, such as 28oC, 30oC, 32oC and 34oC and three nutrient treatments, which were control nutrient treatment, without NO3 and  two times NO3 concentrations from control treatments with three replicates for each treatments. Results found that increasing temperature significantly affected on biomass and concentration free fatty acid, meanwhile nutrient treatments affected on growth rate, biomass and concentration of organic Carbon.  In general, increasing temperature was more affected on Spirulina sp in terms of increasing growth rate, biomass and free fatty acid concentration. However, Skeletonema sp was more responsive to  availability of NO3 in the media culture for increasing free fatty acid, and percentage of free fatty acid per dry weight.
KONSENTRASI MIKROPLASTIK PADA KERANG MANILA Venerupis philippinarum DI PERAIRAN MACCINI BAJI, KECAMATAN LABAKKANG, KABUPATEN PANGKAJEN KEPULAUAN, SULAWESI SELATAN Wahdani, Amelia; Yaqin, Khusnul; Rukminasari, Nita; ., Suwarni; ., Nadiarti; Inaku, Dwi Fajriyati; Fachruddin, Liestiaty
Maspari Journal : Marine Science Research Vol 12, No 2 (2020)
Publisher : UNIVERSITAS SRIWIJAYA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/maspari.v12i2.12809

Abstract

Mikroplastik di perairan menjadi permasalahan yang cukup serius bagi organisme perairan. Organisme filter feeder seperti kerang memiliki resiko yang cukup besar untuk mengakumulasi mikroplastik ke dalam tubuhnya. Salah satu jenis organisme tersebut ialah kerang manila (Venerupis philippinarum) yang banyak terdapat di Perairan Maccini Baji, Kecamatan Labakkang, Kabupaten Pangkajene Kepulauan, Sulawesi Selatan. Penelitian ini bertujuan untuk mengetahui keberadaan dan konsentrasi mikroplastik yang terdapat pada daging kerang manila (Venerupis philippinarum). Pengambilan sampel kerang dilakukan dengan metode sampling acak berlapis (stratified random sampling), sehingga diperoleh sampel sebanyak 118 ekor. 118 sampel kerang manila tersebut kemudian dibagi menjadi tiga kelompok ukuran panjang cangkang kerang yaitu kelas A (3,11 – 3,86 cm), kelas B (3,87 – 4,82 cm), kelas C (4,83 – 6,01 cm). Pengamatan partikel mikroplastik dilakukan dengan menggunakan mikroskop stereo. Hasil pengamatan menunjukkan sebanyak 61 sampel (51,69%) kerang manila mengandung partikel mikroplastik. Mikroplastik yang ditemukan berbentuk fiber dan fragmen, dengan warna dominan biru, hitam, dan transparan. Ukuran mikroplastik yang ditemukan berkisar antara 0,090 – 4,919 mm. Nilai rata-rata konsentrasi mikroplastik pada masing-masing kelompok ukuran panjang cangkang kerang secara berurutan yaitu 0,6129 item/g, 0,6303 item/g, dan 0,2198 item/g. Kata kunci: Fiber, kerang manila, konsentrasi mikroplastik, Maccini Baji, Venerupis philippinarum.
ANALISIS POLA SEBARAN DAN PERKEMBANGAN AREA UPWELLING DI BAGIAN SELATAN SELAT MAKASSAR Inaku, Dwi Fajriyati
Torani Journal of Fisheries and Marine Science Vol. 25 No. 2 (2015)
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (15.153 KB) | DOI: 10.35911/torani.v25i3.2606

Abstract

Waters of the southearn of Makassar Strait is a region which relatively rich of organic matter because thephenomenon of upwelling along the eastern season. The purpose of this research was to analyze the distributionpatterns and the development of upwelling areas in the southern of Makassar Strait. This study used chlorophylladata and sea surface temperature from level 1 of Modis image for two years (2009 and 2010). The resultshowed that phenomenon of upwelling that occurs in the southern Makassar Strait appears since early June, thestrongest upwelling in August and disapear in October. The upwelling was indicated by declining of sea surfacetemperature and increasing of chlorophyll-a concentration. Analysis of wind direction and speed indicate thatthe upwelling occurs in the southern Makassar strait spread to southwest with and estimated upwelling areaaround 46.000 km2.Keywords: upwelling, Makassar Strait, chlorophyll-a, sea surface temperature.
Co-Authors ., Nadiarti Fachruddin, Liestiaty KHUSNUL YAQIN Muhammad Lukman Nita Rukminasari Rahmadi Tambaru Suharto Suharto Suwarni Suwarni Wahdani, Amelia