Sia-sia, has a worm-like shape, is an organism that lives in the coastal areas, especially around the seagrass areas, mangroves and coral reefs and tends to inhabit the bottom of the water especially specifically in the substrate so that it is categorized as benthic organisms. The purpose of this study was to 1) analyze the techniques and patterns of Sia-sia capture, 2) reviewing how to use Sia-sia, and 3) analyze the nutrient content of Sia-sia. The research method is divided into two, namely: field sampling in the form of: distributing questionnaires, interviews and observations while non-field activities, namely laboratory testing in the form of analysis: water content, protein, fat, ash, carbohydrates, minerals Calcium (Ca), phosphorus (P) and iodine (I2). The results of the study show that the Sia-sia capture technique is unique and requires its own skills. The arrests carried out by the local community against Sia-sia are still very controlled so the number of Sia-sia is quite abundant and the habitat is also seen in good condition. But on the other hand, the community has not been able to use it to be produced for economic value.. The nutritional content of Sipuncula on Nusalaut Island differs according to location, but has a complete composition with a range of water content ranging from 74.
Banyak kandungan senyawa kimia bermanfaat dalam makroalga yang bernilai ekonomi tinggi tetapi belum diteliti secara luas, seperti pigmen fotosintesis. Peningkatan kebutuhan pigmen fotosintesis pada dunia industri menyebabkan pencarian sumber alternatif pigmen fotosintesis masih terus dilakukan diantaranya dari makroalga. Penelitian ini bertujuan untuk mengetahuipengaruh lama penyimpanan ekstrak kasar makroalga Ulva lactuca terhadap kestabilan pigmen fotosintesis. Tahapan penelitian meliputi, isolasi pigmen fotosintesis, pemurnian menggunakan kromatografi kolom silika, karakterisasi pigmen fotosintesis dengan KLT dan spektrofotometer UV–Vis. Hasil KLT dari ekstrak kasar Ulva lactuca menunjukkan perbedaan jumlah dan jenis pigmen fotosintesis yang mencolok antara ekstrak kasar Ulva lactuca yang lansung diekstrak dan yang dibiarkan kurang lebih 3 hari. Pada hasil kromarogram menunjukkan ada 7 fraksi pigmen fotosintesis dan memiliki warna yang sangat mencolok yang diekstrak secara langsung sedangkan ekstrak kasar yang dibiarkan kurang lebih 3 hari menunjukkan hanya 5 fraksi pigmen fotosintesis dengan warna yang pucat. Fraksinasi dengan kromatografi kolom silika gel menunjukkan adanya pigmen fotosintesis sebanyak 29 fraksi. Setelah diindentifikasi dengan spektofotometer UV–Vis ada 4 fraksi utama yaitu ß-karoten, fukoxantin, klorofil a,dan feofitin a. Lama penyimpanan terhadap ekstrak kasar Ulva lactuca mempengaruhi pigmen fotosintesis secara kualitatif dan kuantitatif.
Kualitas perairan merupakan salah satu faktor yang berpengaruh terhadap pertumbuhan dan perkembangan makroalga. Penelitian ini bertujuan untuk mengkaji tentang jenis makroalga, kepadatan makroalga dan pengaruh kualitas perairan terhadap kepadatan makroalga di perairan Kei Kecil, Kabupaten Maluku Tenggara. Perairan Kei Kecil memiliki 53 spesies makroalga dengan nilai kepadatan tertinggi di Desa Tanimbar, selanjutnya Ur Pulau dan Uf yang masing-masing sebesar sebesar Kei 363 ind/ m2,308 ind/m2 dan 298 ind/m2. Hubungan antara parameter fisika-kimia dengan kepadatan makroalga dianalisis menggunakan regresi linier berganda. Parameter fisika-kimia memberikan karakteristik yang berbeda antara kedua lokasi penelitian (kecamatan Kei Kecil Barat dan Kei Kecil Timur Selatan). Adapun kepadatan makroalga di kecamatan Kei Kecil Barat dapat diramalkan menggunakan persamaan (R = 98.6%) : Kepadatan = -17185.5 + 402.5 suhu + 161.7 salinitas + 3087.4 pH + 8.2 DO + 149.9 kecerahan + 5.4 kecepatan arus. Sedangkan kepadatan makroalga di kecamatan Kei Kecil Timur Selatan dapat diramalkan menggunakan persamaan (R = 76.7 %) : Kepadatan = 4794.8 – 189.4 suhu + 22 salinitas – 71.5 pH + 331.3 DO -279.9 kecerahan = 112.4 kecepatan arus. Parameter lingkungan yang mempengaruhi kepadatan makroalga yaitu suhu, salinitas, pH dan kecerahan di Kecamatan Kei Kecil Barat sedangkan salinitas, DO dan kecepatan arus di Kecamatan Kei Kecil Timur Selatan.
Algae communities in life in the marine environment, among others, are used by various types of fish and other organisms as a place to live, forage, and spawn. Some types of macro algae also contain lime which plays a role in building coral reefs. As for humans, algae are used as food ingredients, both directly as vegetables and processed first as gelatin. The purpose of this study was to describe the composition of macro algae species found, to calculate density, population size, maximum biomass, and distribution patterns of macro algae communities in the coastal waters of Wakal Village. Taking algae macro samples is done by using the Linear Squares Transect method. Identification results of macro algae samples found 15 species classified into 3 divisions, 3 classes, 9 orders, 10 families, and 12 genera. The total density of macro algae species by individual is 2.86 ind / m2, with the highest density of species owned by Padina minor species and lowest Gelidiella acerosa, Galaxaura filamentosa, Halimeda opuntia, Ulva conglobata, Hypnea pannossa, Hypnea valentiae, and Acanthophora specifera. The total density of macro algae species based on biomass is 68.48 gr / m2 where Padina minor has the highest biomass density value and the lowest is Acanthophora specifera. The total population of macro algae based on individuals is 7.71 ind / ha, with Padina minor having the highest value of the highest and lowest population Gelidiella acerosa, Galaxaura filamentosa, Halimeda opuntia, Ulva conglobata, Hypnea pannossa, Hypnea valentiae, and Acanthophora specifera. The total macro population of algae based on biomass is 184.90 gr / ha with the highest biomass owned by species Padina minor and the lowest is Acanthophora specifera. The total maximum macro biomass of algae is 1008.18 gr / ha with the highest maximum biomass owned by species Padina minor and the lowest maximum biomass is owned by the species Acanthophora specifera. The pattern of macro spread of algae in Wakal Village is in groups (Ip = 0.5).
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