cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota semarang,
Jawa tengah
INDONESIA
Jurnal Kelautan Tropis
Published by Universitas Diponegoro
ISSN : 14108852     EISSN : 25283111     DOI : -
Core Subject :
Arjuna Subject : -
Articles 451 Documents
 36   37   38   39   40 
Indeks Ekologi Komunitas Tintinnid (Protozoa:Ciliophora) di Perairan Banggai, Sulawesi Tengah Sugiyanto, Nenden Rose; Widianingsih, Widianingsih; Suryono, Chrisna Adhi; Hartati, Retno; Endrawati, Hadi
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24783

Abstract

There are several groups of organisms in zooplankton, including ciliates (Filum Ciliophora). Ciliates that live in the sea belong to the suborder tintininna or also often referred to as tintinnids. This study aims to determine the type and abundance and analyze the ecological index of the tintinnid community in Banggai Waters, Central Sulawesi. This research was conducted at 35 stations on 1 – 14 September 2022 in the Banggai Waters, Central Sulawesi. The samples were taken by vertical method. The results showed that 9 families, 20 genera, and 35 tintinnid species were identified. The abundance of tintinnids in Banggai Waters has an average of 5763 cells/m3. Furthermore, the distribution pattern of total abundance at each station shows a clustered distribution pattern. The diversity of tintinnid abundance in Banggai Waters has an average of 2.15, classified as moderate. Tintinnid uniformity in Banggai Waters has an average of 0.63 classified as high. The dominance of tintinnids in Banggai Waters has an average of 0.17 classified as low category. The relationship between total abundance and diversity index shows a positive correlation. Meanwhile, the relationship between the abundance and evenness indices and the dominance indices shows a negative correlation.  The study's results suggest that the condition of the tintinnid community in Banggai Waters is stable. Filum Ciliophora (Ciliata) termasuk dalam kelompok mikrozooplankton.  Ciliata yang hidup di laut termasuk ke dalam subordo Tintininna atau juga sering disebut dengan tintinnid. Penelitian ini bertujuan untuk mengetahui jenis, kelimpahan, dan indeks ekologi dari komunitas tintinnid yang berada di Perairan Banggai, Sulawesi Tengah. Pengambilan sampel dilakukan pada tanggal 1- 14 September  2022 di Perairan Sulawesi Tengah. Sampel  mikrozooplankton diambil secara vertikal pada 35 stasiun.  Hasil penelitian menunjukkan bahwa ditemukan 9 famili, 20 genus, dan 35 spesies tintinnid yang teridentifikasi. Kelimpahan tintinnid di Perairan Banggai memiliki rata-rata sebesar 5763 sel/m3. Selanjutnya pola sebaran dari kelimpahan total di tiap stasiun menunjukkan pola sebaran mengelompok.  Kenekaragaman Kelimpahan tintinnid di Perairan Banggai memiliki rata-rata sebesar 2,15 tergolong kategori sedang.  Keseragaman tintinnid di Perairan Banggai memiliki rata-rata sebesar 0,63 tergolong kategori tinggi. .  Dominansi tintinnid di Perairan Banggai memiliki rata-rata sebesar 0,17 tergolong kategori rendah. Hubungan anatara kelimpahan total dengan indek keanekaragaman menjukkan korelasi positif. Sedangkan hunbungan antrara kelimpahan dengan indek keseragman dan  indek dominansi menjukkan adanya korelasi negatif. Berdasarkan hasil penelitian dapat disimpulkan bahwa kondisi komunitas tintinnid di Perairan Banggai termasuk stabil.
Pola Sebaran Klorofil-a dan Kualitas Air Pada Kawasan Budidaya Rumput Laut Di Perairan Pulau Semau Kabupaten Kupang Kamlasi, Yusuf; Rejeki, Sri; Prayitno, Slamet Budi; Purwanti, Frida
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.23727

Abstract

Seaweed cultivation area is habitat and development if the ecological conditions of the waters support the growth and survival of seaweed. Chlorophyll is one of the parameters that greatly determines primary productivity in the sea. The study aims to find out the patterns of chlorophyll-a spread and water quality in seaweed cultivation areas. The methods used in the investigation were the survey method for water sampling in the field and the spectrophotometry method for laboratory analysis. The results of the survey showed that the chlorophyll value in the seaweed cultivation area in October 2023 averaged 1.43 mg/m3, while in December 2023 the average chlorophyll-A level was 0.90 mg/m3. The chlorophyll-a content in the waters of the island of Semau in October 2023 ranged between 0.29 and 4.56 mg/m3, while in December 2023 it ranged between 0.09 and 2.82 mg/m3. Water quality parameters that affect chlorophyll distribution include nitrates, temperature, salinity, brightness, depth, dissolved oxygen, and pH.  Kawasan budidaya rumput laut sebagai tempat hidup dan berkembang jika kondisi ekologis perairan ikut mendukung pertumbuhan dan keberlangsungan rumput laut. Klorofil merupakan bagian dari parameter yang sangat menentukan produktivitas primer di laut. Penelitian ini bertujuan untuk mengetahui pola sebaran kloroil-a dan kualitas air di kawasan budidaya rumput laut. Metode yang digunakan dalam penelitan ini metode survey untuk pengambilan sampel air di lapangan dan metode Spektrofotometri untuk analisis laboratorium. Hasil peneletian menunjukkan bahwa nilai klorofil pada kawasan budidaya rumput laut pada bulan Oktober 2023 nilai rata-rata sebesar 1,43 mg/m3 sedangkan pada bulan Desember 2023 rata-rata klorofil-a adalah 0,90 mg/m3.  Kandungan klorofil-a di perairan pulau Semau pada bulan Oktober 2023 berkirsar antara 0,29 – 4,56 mg/m3 sedangkan pada bulan Desember 2023 berkisar antara 0,09 – 2,82 mg/m3. Parameter kualitas air yang mempengaruhi distribusi klorofil-a seperti nitrat, suhu, salinitas, kecerahan, kedalaman, oksigen terlarut dan pH.
Kelimpahan, Pola Distribusi Dan Keanekaragaman Echinodermata Di Ekosistem Lamun Pantai Namoanak Tablolong Batubao, Kecamatan Kupang Barat, Kabupaten Kupang, Nusa Tenggara Timur Merryanto, Yohanes; Ginzel, Fanny Iriany; Daud, Yanti
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24250

Abstract

Echinodermata is one of the associated biota that has an important role in seagrass ecosystems. If one of the 5 classes of the Echinodermata Phylum experiences physical, chemical, biological and anthropogenic impacts or pressures, then the population and environmental equilibrium becomes unbalanced. It is known that seagrass and Echinodermata ecosystems have a very beneficial reciprocal relationship. Namoanak Tablolong-Batubao Beach in West Kupang Sub-district, Kupang Regency is one of the coastal areas located on the western tip of Timor Island that has a multi-species seagrass ecosystem (6-7 species), which is inhabited by various biota. Information on the abundance, distribution patterns and diversity of Echinodermata in seagrass ecosystems on these beaches already exists, but the current conditions with the presence of various impacts such as tropical cyclones, land clearing for seaweed cultivation and high community activities are still very minimal. The purpose of this study was to analyze the abundance, distribution pattern and diversity of Echinodermata in seagrass ecosystem of Namoanak Tablolong-Batubao beach, West Kupang District, Kupang Regency. The sampling method used line transect and quadrat. The results showed that the Echinodermata Filum found included Astreoidea Class with 3 families and 3 species, Echinoidea Class with 5 families and 11 species, and Holothuroidea Class with 2 families and 4 species. The highest species abundance of the Echinodermata phylum is Protoreaste nodosus (Asteroidea) at Station 1-2 and Diadema setosum (Echinoidea) at Station 3-4. The distribution pattern at the four stations is categorized as uniform distribution. The diversity index value of the Echinodermata Filum at each station has moderate diversity. Echinodermata merupakan salah satu biota asosiasi yang mempunyai peran penting dalam ekosistem lamun. Apabila salah satu dari 5 kelas Filum Echinodermata mengalami dampak atau tekanan baik fisik, kimia, biologi dan antropogeneik, maka kesetimbangan populasi dan lingkungan menjadi tidak setimbang. Diketahui bahwa ekosistem lamun dan Echinodermata memiliki hubungan timbal balik yang sangat menuntungkan. Pantai Namoanak Tablolong-Batubao di Kecamatan Kupang Barat Kabupaten Kupang merupakan salah satu wilayah pesiisir pantai yang terletak di ujung barat Pulau Timor yang memiliki ekosistem lamun multispesies (6-7 spesies), dimana dihuni oleh berbagai biota. Informasi tentang kelimpahan, pola distribusi dan keanekaragaman Echinodermata di ekosistem lamun pada pantai tersebut sudah ada, namun kondisi saat ini dengan hadirnya berbagai dampak seperti siklon tropis, pembukaan lahan untuk budidaya rumput laut dan aktivitas masyarakat yang tinggi masih sangat minim. Tujuan dari penelitian ini adalah menganalisis kelimpahan, pola sebaran dan keanekaragaman Echinodermata di ekosistem lamun pantai Namoanak Tablolong-Batubao, Kecamatan Kupang Barat, Kabupaten Kupang. Metode pengambilan sampel menggunakan transek garis dan kuadrat. Hasil penelitian menunjukkan bahwa Filum Echinodermata yang ditemukan antara lain Kelas Astreoidea ada 3 famili dan 3 spesies, Kelas Echinoidea sebanyak 5 famili dan 11 spesies, dan Kelas Holothuroidea sebanyak 2 famili dan 4 spesies. Kelimpahan jenis tertinggi Filum Echinodermata adalah Protoreaste nodosus (Asteroidea) pada Stasiun 1-2 dan Diadema setosum (Echinoidea) di Stasiun 3-4. Pola sebaran pada keempat stasiun dikategori sebagai sebaran seragam. Nilai indeks keanekaramagan Filum Echinodermata di setiap stasiun memiliki keanekaragaman sedang.
Determinasi Teripang Dari Sisi Perairan Kepulauan Sangihe, Sulawesi Utara Wodi, Stevy Imelda Murniati; Dewi, Eko Nurcahya; Riyadi, Putut Har; Pringgenies, Delianis
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.23544

Abstract

This research focused on determination of sea cucumber in Sangihe Island, North Sulawesi. This study aims to explore species diversity of sea cucumber. Samples were collected with scuba diving and underwater camera, for morphological and spicule identification. This research found found 5 species in Sangihe Island, are Personothuria graffei, Bohadchia argus, Stichopus horrens, Holothuria fuscogilva, and Actinopyga miliaris. Pearsonothuria graffei had silk-likely colour, and Bohadchia argus with a dotted pattern around the body. Meanwhile, Stichopus horrens, Holothuria fuscogilva, and Actinopyga miliaris had a difference in body shape and the colour. This research significantly revealed the species diversity of sea cucumber for the sustainable resources along with the protection of the environmental condition in Sangihe Island waters, North Sulawesi. The information can be utilized as a step to protect and preserve the existence of sea cucumbers, which are a crucial component of the marine ecosystem. Penelitian tentang teripang di sisi perairan kepulauan Sangihe, Sulawesi Utara merupakan studi yang bertujuan untuk mengetahui jenis-jenis teripang yang hidup di daerah tersebut. Metode yang digunakan adalah pengumpulan sampel menggunakan scuba diving dan kamera bawah air. Penggunaan scuba diving memungkinkan untuk mengumpulkan sampel sehingga memungkinkan juga ambil foto teripang dibawah air dengan habitatnya. Hasil dari penelitian ini menunjukkan adanya lima jenis teripang yang ditemukan, yaitu Pearsonothuria graeffei (Sutra), Bohadchia argus (Bintik/Batik), Stichopus horrens, Holothuria fuscogilva, dan Actinopyga miliaris. Pearsonothuria graeffei adalah teripang yang memiliki ciri khas berwarna seperti sutra, Bohadchia argus memiliki bintik atau motif batik pada tubuhnya, sedangkan Stichopus horrens, Holothuria fuscogilva, dan Actinopyga miliaris memiliki perbedaan dalam bentuk dan warna tubuhnya. Penelitian ini dapat memberikan informasi penting tentang diversitas teripang di sisi perairan kepulauan Sangihe, Sulawesi Utara. Koleksi sampel yang dilakukan juga dapat memberikan gambaran tentang kondisi ekosistem perairan tersebut. Informasi ini dapat digunakan sebagai langkah untuk melindungi dan mempertahankan keberadaan teripang yang menjadi bagian penting dari ekosistem laut. 
Metabolit Sargassum sp. sebagai Agen Antioksidan dan Fotoprotektif Radiasi Ultraviolet Sedjati, Sri; Trianto, Agus; Larasati, Stefanie Jessica Henny; Haqqu, Alir Adn
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.23999

Abstract

Ultraviolet radiation (UVR) from sunlight can damage human skin. The formation of free radicals in skin tissue, sunburn, erythema, and skin tanning are effects that often occur due to exposure to high intensity. Sunscreen cosmetics are commonly used to protect human skin, some use seaweed extract in their formulations. This study was conducted to search for metabolites from Sargassum sp. which have activity as antioxidants and ultraviolet radiation (UVR) photoprotective.  Graded maceration with hexane, ethyl acetate, and ethanol solvents was done to extract all metabolites according to their polarity. The content of pigments (chlorophyll & carotenoids), total phenolic content (TPC), antioxidant activity, and UVR photoprotective are determined by spectrophotometry. Antioxidant activity was analyzed based on the value of inhibition percentage (IC50) against 2,2-diphenyl-1-picrylhydrazyl (DPPH) and  UVR photoprotective was based on the value of sun protection factor (SPF), a percentage of erythema transmission (%Te), and pigmentation transmission (% Tp). The results of the research showed that of the three, hexane extract (H), ethyl acetate extract (Ea), and ethanol extract (Et) all contain carotenoids, but one of them, namely H, did not contain chlorophyll. The largest TPC was found in Et i.e. 15.79 mg of GAE/g. The highest antioxidant activity was achieved by H, followed by Ea with a slight difference in IC50, respectively at 198.61 and 204.12 μg/mL. The highest UVR photoprotective activity was achieved by Ea with an SPF value of 13,480, %Te 4,037, and %Tp 24,316 (at 200 μg/mL). Ethyl acetate extract from Sargassum sp. has been tested as the best antioxidant and UVR photoprotective agent and can be used in sunscreen cosmetic formulations.  Radiasi ultraviolet (UVR) yang bersumber dari cahaya matahari dapat memicu kerusakan kulit manusia. Terbentuknya radikal bebas dalam jaringan kulit, kulit terbakar, kulit memerah, maupun penggelapan kulit merupakan efek yang sering terjadi akibat paparan UVR dalam intensitas tinggi. Kosmetik tabir surya biasa digunakan untuk melindungi kulit manusia dan beberapa di antaranya menggunakan ekstrak rumput laut dalam formulasinya. Penelitian ini dilakukan untuk mencari metabolit dari Sargassum sp. yang memiliki aktivitas sebagai antioksidan dan fotoprotektif UVR. Maserasi bertingkat dengan pelarut heksana, etil asetat, dan etanol dilakukan untuk mengekstrak semua metabolit sesuai dengan polaritasnya. Kandungan pigmen (klorofil & karotenoid), fenolik total, aktivitas antioksidan, maupun fotoprotektif UVR ditentukan dengan metode spektrofotometri. Aktivitas antioksidan dianalisis berdasarkan nilai persentase inhibisisi (IC50) terhadap 2,2-diphenyl-1-picrylhydrazyl (DPPH), sedangkan fotoprotektif UVR berdasarkan nilai sun protection factor (SPF), persentase transmisi eritema (%Te), dan transmisi pigmentasi (% Tp). Hasil peneltian menunjukkan bahwa dari ketiganya, ekstrak heksana (H), ekstrak etil asetat (Ea), dan ekstrak etanol (Et) semuanya mengandung karotenoid, tetapi salah satunya, yaitu H tidak mengandung klorofil. Kandungan fenolik total paling besar terdapat pada Et, yaitu sebesar 15,79 mg GAE/g. Aktivitas antioksidan tertinggi dicapai oleh H, diikuti oleh Ea dengan sedikit perbedaan nilai IC50, secara berurutan yaitu sebesar 198,61 dan 204,12 µg/mL. Aktivitas fotoprotektif UVR paling tinggi dicapai oleh Ea, yaitu dengan nilai SPF sebesar 13,480, %Te 4,037, dan %Tp 24,316 (pada konsentrasi 200 µg/mL).  Ekstrak etil asetat dari Sargassum sp. teruji sebagai agen antioksidan dan fotoprotektif UVR terbaik dan bisa dimanfaatkan dalam formulasi kosmetik tabir surya. 
Assessing the Impact of Substrate and Shelter on Cannibalism in Blue Swimming Crab (Portunus pelagicus) Ariyati, Restiana Wisnu; Caesa, Genio; Rejeki, Sri; Hutabarat, Johannes; Haeruddin, Haeruddin; Sarjito, Sarjito; Widowati, Lestari Lakhsmi; Bosma, Roel
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/potensi.%Y.24653

Abstract

Blue swimming crab (Portunus pelagicus) is one of Indonesia’s essential fishery commodities, but overfishing has depleted its population. Aquaculture, as an alternative to produce this crab, is hampered by high levels of cannibalism. Substrates or shelters can reduce cannibalism. This study compared the effectiveness of one substrate and two types of shelter for reducing cannibalism of P. pelagicus crablets. Crablets with average carapace length of 3.6 ± 2.2 cm and average weight of 6.4 ±1.5 g.ind-1 were stocked in 24 rectangular tarpaulin tanks with 1 m2 surface and 50 cm water depth. The stocking density was 8 crablets in each tank. A split-plot experimental design was applied with four main plots and two subplots with 3 replications. The main plot consisted of A0 (without shelter), A1 (seaweed), A2 (pipes), and A3 (seaweed and pipes), and sub-plots had either no-substrate (B0) or sand-substrate (B1). Cannibalism (K), survival (S), and four water quality parameters were recorded for 42 days. The data were analyzed using an ANOVA for a split-plot design and post-hoc Tukey. The results show that the sand substrate significantly (P>0.05) reduced cannibalism and increased survival of the P. pelagicus. Treatment A0B0, without substrate or shelter, showed the highest cannibalism (54±7%) and lowest survival rates (33±7%). While treatment A1B1, with Gracillaria sp. as shelter and sand as bottom-substrate resulted in the lowest cannibalism (4±7%) and highest survival rates (88±13%).
Feeding habit and Predation Selectivity of Reef Fish Chaetodon octofasciatus in Artificial Patch Reef and Natural Reef of Panjang Island, Jepara Bramasta, Arrico Fathur Yudha; Munasik, Munasik; Haryanti, Dwi
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.21731

Abstract

Chaetodon octofasciatus is a species of fish in the Chaetodontidae family, commonly known as an indicator fish in the reef ecosystem as the frequency of its appearance in the wild can interfere with the state of the coral reef ecosystem in the waters. Panjang Island is located in Jepara, Central Java, Indonesia, in which one method of coral reef ecosystem rehabilitation in a a form of Artificial Patch Reef (APR) has been implemented. This study aims to investigate the levels of C. octofasciatus predation on corals in the APR and Natural reef of Panjang Island. We used the LIT (Line Intercept Transect) to measure the density of coral reefs at both locations. The abundance of C. octofasciatus was calculated using the Belt Transect method, while selectivity and bite ratio was observed and counted every 5 minutes. The results shows that C. octofasciatus from natural reefs have the highest predation rate (185 bites/5 min) and mostly eat the coral with lifeform massive while the ones from APR shows 144 bites/5 min and mostly eat the coral with lifeform Acropora branching. This selectivity could be due to the availability of corals in both areas. While massive corals were highly available in the natural reefs, branchich corals esp. Acropora is mostly planted in the APR. A more diverse coral lifeform in the natural reef also showed the type of corals that are less selected by C. octofasciatus such as submassive corals and Acropora tabulate, as well as corals with the foliose life form.  
Potensi Antioksidan dan Karakterisasi Pada Kolagen Teripang (Stichopus horrens) Suryani, Askiya Intan; Pringgenies, Delianis; Setyati, Wilis Ari
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.23892

Abstract

Stichopus horrens, a marine organism known for its numerous health benefits, particularly in the medical field, was the focus of this study, which aimed to evaluate the collagen characterization and antioxidant potential of this species. An exploratory descriptive method was employed. The S. horrens samples were extracted using NaOH, CH3COOH, and distilled water to obtain collagen. After freeze-drying, the total collagen yield was 39.3%. FTIR analysis revealed the highest collagen peak at Amide A (3280.89 cm⁻¹), indicating O-H stretching. Amino acid analysis using HPLC showed L-Leucine as the highest essential amino acid (10.6%), while L-Methionine was the lowest (0.1%). Among non-essential amino acids, L-Glutamic acid was the highest (25.7%), with L-Cystine as the lowest (0.5%). Antioxidant activity was evaluated using DPPH, ABTS, and FRAP assays. The IC50 values were 91.12 ppm for DPPH and 117.17 ppm for ABTS. The FRAP assay indicated a Trolox equivalent value of 153.90 mmol/g. Antioxidant evaluation via DPPH and ABTS assays showed moderate antioxidant strength, while the FRAP assay indicated strong antioxidant potential. Teripang Stichopus horrens, organisme laut yang memiliki berbagai manfaat kesehatan, khususnya di bidang medis. Penelitian ini bertujuan untuk mengevaluasi karakterisasi kolagen dan potensi antioksidan S. horrens. Metode eksploratif deskriptif digunakan. Sampel S. horrens diekstraksi menggunakan NaOH, CH3COOH, dan air suling untuk mendapatkan kolagen. Total hasil kolagen setelah pengeringan beku adalah 39,3%. Analisis FTIR menunjukkan puncak kolagen tertinggi pada Amida A 3280,89, yang menunjukkan peregangan OH. Analisis asam amino menggunakan HPLC mengungkapkan L-Leusin sebagai asam amino esensial tertinggi (10,6%) dan L-Metionin sebagai yang terendah (0,1%). Di antara asam amino nonesensial, L-Asam Glutamat adalah yang tertinggi (25,7%), dan L-Sistin terendah (0,5%). Aktivitas antioksidan dinilai menggunakan metode DPPH, ABTS, dan FRAP, dengan nilai IC50 sebesar 91,12 ppm untuk DPPH dan 117,17 ppm untuk ABTS. Uji FRAP menunjukkan nilai ekuivalen Trolox sebesar 153,90 mmol/g. Uji antioksidan dengan metode DPPH dan ABTS menunjukan kekutan antioksidan sedang dan untuk FRAP dalam kategori yang kuat.
Profil Nutrisi, Mineral dan Kandungan Logam Berat Rumput Laut Cokelat Sargassum sp. Astriani, Aisyah; Nurjanah, Nurjanah; Jacoeb, Agoes Mardiono
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24274

Abstract

Sargassum sp. is a type of brown seaweed that is quite abundant and grows naturally in coastal waters of Indonesia which is rich in nutritional components such as protein, vitamins, minerals and others that have many benefits (in the food industry, health and beauty). The purpose of this study was to determine the amount of nutrients, minerals and heavy metals contained in Sargassum sp. seaweed obtained from the waters of Ekas Beach, Lombok, Indonesia. The results of proximate analysis of Sargassum sp. seaweed flour showed that protein was the highest result of 43.73%, with fat content with the lowest result of 0.558%. Mineral analysis results showed that potassium (K) had the highest proportion of 27.043 mg/kg and calcium (Ca) had the lowest proportion of 11.936 mg/kg. The resulting Na:K ratio in seaweed flour is 0.853, which meets the WHO standard of no more than one. The results of heavy metal analysis show that heavy metal lead (Pb) 3.596 mg/kg and cadmium (Cd) 0.297 mg/kg have exceeded the maximum limit set by the National Standardization Agency in 2015. This can be caused by the many activities of fishing boats and settlements in the sampling waters. The analysis of acid insoluble ash showed 1.858 mg/kg, which is quite high. Acid insoluble ash content refers to the residual metals or minerals that cannot be dissolved in acid solvents and ash is also a parameter that indicates the cleanliness of the process that can determine food quality.  Sargassum sp. merupakan salah satu jenis rumput laut berwarna coklat yang cukup melimpah dan tumbuh secara alami di perairan pantai Indonesia yang kaya akan komponen nutrisi seperti protein, vitamin, mineral dan lainnya yang memiliki banyak manfaat (dalam industri makanan, kesehatan dan kecantikan). Tujuan dari penelitian ini adalah untuk mengetahui jumlah nutrisi, mineral dan logam berat yang terkandung dalam rumput laut Sargassum sp. yang diperoleh dari perairan Pantai Ekas, Lombok, Indonesia. Hasil analisis proksimat tepung rumput laut Sargassum sp. menunjukkan bahwa protein merupakan hasil tertinggi yaitu 43,73%, dengan kadar lemak dengan hasil terendah yaitu 0,558%. Hasil analisis mineral menunjukkan bahwa kalium (K) memiliki proporsi tertinggi yaitu 27,043 mg/kg dan kalsium (Ca) memiliki proporsi terendah yaitu 11,936 mg/kg. Rasio Na:K yang dihasilkan pada tepung rumput laut adalah 0,853, yang memenuhi standar WHO yaitu tidak lebih dari satu. Hasil analisis logam berat menunjukkan bahwa logam berat timbal (Pb) 3,596 mg/kg dan kadmium (Cd) 0,297 mg/kg telah melebihi batas maksimum yang ditetapkan oleh Badan Standarisasi Nasional pada tahun 2015. Hal ini dapat disebabkan oleh banyaknya aktivitas kapal nelayan dan pemukiman di perairan pengambilan sampel. Hasil analisis abu tidak larut asam menunjukkan angka 1,858 mg/kg, cukup tinggi. Kadar abu tidak larut asam mengacu pada sisa logam atau mineral yang tidak dapat larut dalam pelarut asam dan abu juga merupakan parameter yang mengindikasikan kebersihan proses yang dapat menentukan kualitas pangan. 
Plant Spacing Variations on Cell Number and Agar Content in Gracilaria verrucosa Purwanti, Andi; Mulyani, Sri; Budi, Sutia
Jurnal Kelautan Tropis Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i3.24010

Abstract

 The primary issue at the Gracilaria verrucosa seaweed cultivator is the low productivity associated with current cultivation methods. Analyzing cell number and agar content provides valuable insights into seaweed cultivation productivity, growth activity, nutrient absorption, and chemical composition. This research aims to examine how variations in planting distance affect the cell number and agar content of Gracilaria verrucosa. The research was conducted at the Maranak Experimental Pond Installation, Brackish Water Aquaculture Fisheries Research Institute, located in Marannu Village, Lau District, Maros Regency. Analysis of cell numbers and agar content was performed at the Fisheries Research Institute Laboratory of the Brackish Water Aquaculture Center from June to July 2024. Utilizing a completely randomized quantitative experimental design with four treatments and three repetitions, the research included: Treatment A (planting distance 20 cm), Treatment B (30 cm), Treatment C (40 cm), and Treatment D (50 cm). The results indicated that planting distance significantly impacts cell number, with the 50 cm distance yielding the highest average cell count of 213.00 ± 9.64. Similarly, planting distance affects agar content, with the 50 cm distance producing the highest agar content of 27.31%. Therefore, a planting distance of 50 cm is identified as the most effective, resulting in both the highest number of cells and agar content. 

Page 38 of 46 | Total Record : 451

 36   37   38   39   40 

Filter by Year

2015 2026


Reset
Filter By Issues
All Issue Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS (inpress) Vol 29, No 1 (2026): JURNAL KELAUTAN TROPIS Vol 28, No 3 (2025): JURNAL KELAUTAN TROPIS Vol 28, No 2 (2025): JURNAL KELAUTAN TROPIS Vol 28, No 1 (2025): JURNAL KELAUTAN TROPIS Vol 27, No 3 (2024): JURNAL KELAUTAN TROPIS Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS Vol 26, No 2 (2023): JURNAL KELAUTAN TROPIS Vol 26, No 1 (2023): JURNAL KELAUTAN TROPIS Vol 25, No 3 (2022): JURNAL KELAUTAN TROPIS Vol 25, No 2 (2022): JURNAL KELAUTAN TROPIS Vol 25, No 1 (2022): JURNAL KELAUTAN TROPIS Vol 24, No 3 (2021): JURNAL KELAUTAN TROPIS Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS Vol 24, No 1 (2021): JURNAL KELAUTAN TROPIS Vol 23, No 3 (2020): JURNAL KELAUTAN TROPIS Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS Vol 23, No 1 (2020): JURNAL KELAUTAN TROPIS Vol 22, No 2 (2019): JURNAL KELAUTAN TROPIS Vol 22, No 1 (2019): JURNAL KELAUTAN TROPIS Vol 21, No 2 (2018): JURNAL KELAUTAN TROPIS Vol 21, No 1 (2018): JURNAL KELAUTAN TROPIS Vol 20, No 2 (2017): JURNAL KELAUTAN TROPIS Vol 20, No 1 (2017): JURNAL KELAUTAN TROPIS Vol 19, No 2 (2016): JURNAL KELAUTAN TROPIS Vol 19, No 1 (2016): JURNAL KELAUTAN TROPIS Vol 18, No 3 (2015): JURNAL KELAUTAN TROPIS Vol 18, No 2 (2015): JURNAL KELAUTAN TROPIS Vol 18, No 1 (2015): JURNAL KELAUTAN TROPIS More Issue