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All Journal JURNAL RISET DIWA BAHARI
Januar Noor, Rahmat
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Immunology & microbiology

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Analisis Mutu pada Rantai Pasar Usaha Rumput Laut Eucheuma Spinosum di Desa Darawa Kecamatan Kaledupa Slatan Kabupaten Wakatobi Febriani, Febriani; Awaluddin, Awaluddin; Januar Noor, Rahmat
Jurnal Riset Diwa Bahari (JRDB) Volume 1, Nomor 1, 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v1i1.10

Abstract

This study aimed to determine how the marketing chain of Eucheuma spinosum seaweed and the quality of dry Eucheuma spinosum seaweed originate from each marketing chain in the research area. This research was expected to provide information to the public regarding the marketing chain of dried Eucheuma spinosum seaweed. This research was held from July to August 2021 in Darawa Village, South Kaledupa District, Wakatobi Regency, and the Laboratory of Water Productivity and Quality, Faculty of Marine Science and Fisheries, Hasanuddin University. This type of research is quantitative and qualitative research (mixed method). The results showed that the seaweed market chain originating from Darawa Village, South Kaledupa District, Wakatobi Regency, consists of fishermen as producers, local collectors, interregional collectors, and intercity collectors. The results of the research on the quality of dry Eucheuma spinosum seaweed showed that the water content at the fishermen level was 62,212%, local collectors were 63,485%, and inter-regional collectors were 64,139%. The viscosity test value of dry Eucheuma spinosum seaweed at the fishermen level is 30.77 cps, local collectors are 34.57 cps, and inter-regional collectors are 32.40 cps. This research concludes that the seaweed from Darawa Village has penetrated the inter-regional market while the quality of the seaweed at each level of the market chain does not show a significant difference.
Identifikasi Jenis dan Nilai Indeks Keanekaragaman Ekosistem Mangrove di Kelurahan Barombong Kecamatan Tamalate Kota Makassar Isman, Muhammad; Fathuddin; Januar Noor, Rahmat
Jurnal Riset Diwa Bahari (JRDB) Volume 1, Nomor 2, 2023
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v1i2.16

Abstract

The mangrove ecosystem is one of the key ecosystems on the coast which is an indicator of the environmental health of a coastal area. The coast of Makassar City is experiencing very rapid structural development marked by reclamation. This condition causes the existence of the mangrove ecosystem on the coast of Makassar City to be increasingly threatened. This study aims to determine the condition of the type and distribution of mangroves in the Barombong sub-district of Tamalatea, Makassar. The research was conducted from March to May 2023 in Tamalatea coastal area, Makassar. This research is an exploratory study conducted by survey method. The results of the study obtained four types of true mangroves and seven types of associated plants. The results obtained Rhizophora mucronata species have the highest value on the relative frequency index, relative dominance, relative density, and important value index.
Pengaruh Perbedaan Salinitas Terhadap Tingkat Osmoregulasi Larva Udang Vaname Penaeus vannamei Atjo, Andi Arham; Anita; Januar Noor, Rahmat; Rusyd Mahfud, Chairul
Jurnal Riset Diwa Bahari (JRDB) Volume 2, Nomor 1, 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v2i1.22

Abstract

This study aims to determine the effect of differences in salinity on the level of osmoregulation of vaname shrimp larvae (L. vannamei). The research method used a completely randomized design with 4 treatments and 3 replications, namely treatment 17 ppt (A), 22 ppt (B), 27 ppt (C), and 32 ppt (D). The parameters observed were survival rate, absolute weight growth, and osmoregulation at the osmotic work rate (TKO) of vaname shrimp. Data analysis used descriptive. A salinity of 22 ppt gave the best results for survival rates, namely 92.22%, and the best absolute weight growth results, namely 1.03 grams at a salinity of 17 ppt. The results showed that differences in salinity had no significant effect (p > 0.05) on survival and growth in absolute weight. The TKO value of treatment A is media with a salinity of 17 ppt with a value of 654 mOsm/H2O which is the highest TKO value and is a shrimp that is hyperosmotic, namely a liquid whose osmotic concentration is higher than its environment, treatment B is a medium with a salinity of 22 ppt with a value of 500 mOsm/H2O which is the lowest TKO value and is a shrimp that includes isoosmotic regulation. The level of osmoregulation in vaname shrimp indicates a stagnant osmotic performance level so it can be stated that there is no difference in TKO based on salinity.
Co-Authors Anita Atjo, Andi Arham Awaluddin Awaluddin Fathuddin Fathuddin Febriani Isman, Muhammad Mahfud, Chairul Rusyd