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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis BIOTROPIA - The Southeast Asian Journal of Tropical Biology Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil AGRIKAN Jurnal Ilmiah Agribisnis dan Perikanan Jurnal Pengelolaan Perairan Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil
Rochmady
Coastal And Isle Research Group, College Of Wuna Agriculture, Raha Pusat Studi Pesisir Dan Pulau-Pulau Kecil, Sekolah Tinggi Pertanian Wuna, Jl. Letjend. Gatot Subroto Km.7 Lasalepa Raha 93654
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science Immunology & microbiology Library & Information Science Veterinary

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The effect of deacetylation temperature on quality crab chitosan (Portunus pelagicus) Ula, Mosriula; Anshar, Anshar; Karyawati, Karyawati; Samsibar, Samsibar; Rakhfid, Abdul; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 1 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.1.15-20

Abstract

Crab (Portunus pelagicus) is a fishery export commodity, especially to Japan, the European Union and the United States. On the other hand, the crab part, namely the shell, is still not utilized optimally so it becomes waste. To make crab shells valuable, several studies have revealed the presence of useful substances known as chitin and chitosan. Therefore, this research was carried out with the aim of knowing the effect of deacetylation temperature on the quality of chitosan and the optimal deacetylation temperature so as to produce good quality chitosan. Method: This study employs an experimental methodology based on Fully Randomized Design (CRD) analysis. Several deacetylation temperature treatments (00C, 900C, 950C, 1000C, 1050C, 1100C, 1150C, 1200C) were repeated three times in this study's design. Analyses of yield, moisture content, ash content, protein content, and acetyl content serve as test parameters. Result: The results showed that the treatment using different deacetylation temperatures had a very significant effect (Fcrit > Ftable 1%) on water content, ash content, protein content, acetyl content and had no significant effect (Fcrit > Ftable 5%) on the yield. The optimal deacetylation temperature was 1200C, with a yield of 19.050%, water content of 8.340%, ash content of 0.022%, protein content of 0.198%, and acetyl content of 84.870%. Conclusion: The conclusion based on analysis that the best temperature deacetylation in producing quality chitosan crab is 1200C.
Mangrove litter production In the waters of Los Island, Tanjungpinang City, Indonesia Depitra, Depitra; Lestari, Febrianti; Susiana, Susiana; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 1 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.1.21-26

Abstract

The mangrove ecosystem is one of the ecosystems that has an important role in Indonesia's coastal areas, one of which is on Los Island. Los Island is located in Senggarang Village, Tanjungpinang City, Riau Islands Province. Los Island is a small island with mangrove vegetation around the edges. This research was carried out in March-April 2024. The research location was in the waters of Los Island, Tanjungpinang City. The method used is the direct service method in the field. Determination of sampling locations was carried out using a systematic random sampling method. sampling from members of a population where the first element is selected randomly and the next element is selected systematically based on certain patterns. In sampling litter production, 10 points were taken at a distance of 200 m. Based on the results of the analysis of mangrove litter production, the average value of litter production during the 4 weeks of observation on Los Island, Tanjungpinang City was 38.24 g DW/m2. In week 1 the average value of mangrove litter production was 72.12 g DW/m². In week 2 the average value of mangrove litter production was 74.67 g DW/m². In weeks 3 and 4, the average value of mangrove litter production was 72.86 g DW/m² and 93.30 g DW/m2. The value of the mangrove decomposition rate is based on the results of the analysis of litter decomposition calculations with an average value in weeks 1 and 2 of 1.78 g/day, in week 3 of 1.70 g/day, and in week 4 a value of 1.87 g/day.
Mangrove litter production In the waters of Los Island, Tanjungpinang City, Indonesia Depitra, Depitra; Lestari, Febrianti; Susiana, Susiana; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 1 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.1.21-26

Abstract

The mangrove ecosystem is one of the ecosystems that has an important role in Indonesia's coastal areas, one of which is on Los Island. Los Island is located in Senggarang Village, Tanjungpinang City, Riau Islands Province. Los Island is a small island with mangrove vegetation around the edges. This research was carried out in March-April 2024. The research location was in the waters of Los Island, Tanjungpinang City. The method used is the direct service method in the field. Determination of sampling locations was carried out using a systematic random sampling method. sampling from members of a population where the first element is selected randomly and the next element is selected systematically based on certain patterns. In sampling litter production, 10 points were taken at a distance of 200 m. Based on the results of the analysis of mangrove litter production, the average value of litter production during the 4 weeks of observation on Los Island, Tanjungpinang City was 38.24 g DW/m2. In week 1 the average value of mangrove litter production was 72.12 g DW/m². In week 2 the average value of mangrove litter production was 74.67 g DW/m². In weeks 3 and 4, the average value of mangrove litter production was 72.86 g DW/m² and 93.30 g DW/m2. The value of the mangrove decomposition rate is based on the results of the analysis of litter decomposition calculations with an average value in weeks 1 and 2 of 1.78 g/day, in week 3 of 1.70 g/day, and in week 4 a value of 1.87 g/day.
The effect of deacetylation temperature on quality crab chitosan (Portunus pelagicus) Ula, Mosriula; Anshar, Anshar; Karyawati, Karyawati; Samsibar, Samsibar; Rakhfid, Abdul; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 1 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.1.15-20

Abstract

Crab (Portunus pelagicus) is a fishery export commodity, especially to Japan, the European Union and the United States. On the other hand, the crab part, namely the shell, is still not utilized optimally so it becomes waste. To make crab shells valuable, several studies have revealed the presence of useful substances known as chitin and chitosan. Therefore, this research was carried out with the aim of knowing the effect of deacetylation temperature on the quality of chitosan and the optimal deacetylation temperature so as to produce good quality chitosan. Method: This study employs an experimental methodology based on Fully Randomized Design (CRD) analysis. Several deacetylation temperature treatments (00C, 900C, 950C, 1000C, 1050C, 1100C, 1150C, 1200C) were repeated three times in this study's design. Analyses of yield, moisture content, ash content, protein content, and acetyl content serve as test parameters. Result: The results showed that the treatment using different deacetylation temperatures had a very significant effect (Fcrit > Ftable 1%) on water content, ash content, protein content, acetyl content and had no significant effect (Fcrit > Ftable 5%) on the yield. The optimal deacetylation temperature was 1200C, with a yield of 19.050%, water content of 8.340%, ash content of 0.022%, protein content of 0.198%, and acetyl content of 84.870%. Conclusion: The conclusion based on analysis that the best temperature deacetylation in producing quality chitosan crab is 1200C.
Density and regeneration of mangrove ecosystems in open and natural areas in the waters of Kampung Batu Licin, East Bintan Mahuris, Aziz; Lestari, Febrianti; Susiana, Susiana; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 2 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.2.73-78

Abstract

Mangroves are vegetation communities that generally grow along the coastline and provide many functions ranging from ecological functions as habitats and economic functions as areas of utilization for humans. In the waters of Batu Licin Village there is an open mangrove area after bauxite mining, therefore it is necessary to conduct research on the level of density and mangrove regeneration seen from the presence of seedlings, saplings, and mangrove trees. This research was conducted in October 2024 in the waters of Kampung Batu Licin East Bintan, the method used in this study is purposive sampling which considers the area around the post-bauxite mine and the area that is still natural. By calculating mangrove density and analyzing the level of regeneration. At the research site found 8 types of mangroves such as Avicenia lanata, Bruguiera gymnorrhiza, Bruguiera cylindrica, Rhizhopora apiculata, Ceriops tagal, Rhizophora mucronata, Xylocarpus granatum, and Sonneratia alba. The density of mangrove seedlings on open land (post bauxite mine) has a high value with a value of 84,000 ind/ha, saplings with a value of 4,960 ind/ha, and trees with a value of 1,310 ind/ha are in the medium category. While on natural land for seedling density with a value of 54,000 ind/ha, at the stake level with a value of 5,240 ind/ha, and trees 1,760 ind/ha are in the very dense category. For the level of regeneration in the two areas is equally good because the presence of seedlings is more than saplings and saplings are more than trees.
Identification of sea grape (Caulerpa racemosa) content using X-Ray Fluorescence (XRF) spectrometer Susilawati, Dewi; Fendi, Fendi; Rochmady, Rochmady; Rakhfid, Abdul; Mosriula, Mosriula
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 2 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.2.107-113

Abstract

Seaweed possesses the potential to serve as a functional food or supplement, being nutrient-dense and a source of food and medicine due to its abundance of minerals, vitamins, and antioxidants. In Indonesia, seaweed is extensively utilized due to its advantageous properties for multiple industries, including agriculture, animal husbandry, pharmaceuticals, chemicals, and medicine. This study seeks to discover a specific component of sea grape (Caulerpa racemosa), which is prevalent in the waters of Lohia Village, Lohia District, Muna Regency, Southeast Sulawesi. The composition of sea grape (Caulerpa racemosa) was analyzed utilizing an X-ray Fluorescence Spectrometer (XRF) due to its capacity to detect nearly all minerals in a single measurement. The study's findings indicated that sea grapes (Caulerpa racemosa) at stations 1, 2, and 3 contained Chlorine (Cl), Calcium (Ca), Potassium (K), and Bromine (Br), along with several trace elements including Iron (Fe), Phosphorus (P), Strontium (Sr), Silicon (Si), and Titanium (Ti) in minor quantities. At stations 4, 5, and 6, sea grapes (Caulerpa racemosa) predominantly exhibited Chlorine (Cl), Potassium (K), and Magnesium (Mg), whereas Calcium (Ca) and Bromine (Br) were present in lesser quantities. Despite the considerable benefits of sea grapes (Caulerpa racemosa) for humans, caution is imperative in their use. Sea grapes (Caulerpa racemosa) possess the capacity to absorb minerals and bioaccumulate heavy metals from seawater, resulting in the presence of trace elements.
The status of mangrove ecosystems on Keter Island, Tembeling Waters, Bintan Regency, Riau Islands Lubis, Latif; Lestari, Febrianti; Susiana, Susiana; Rochmady, Rochmady
Akuatikisle: Jurnal Akuakultur, Pesisir dan Pulau-Pulau Kecil Vol 9, No 2 (2025)
Publisher : Sangia Research Media and Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29239/j.akuatikisle.9.2.93-98

Abstract

Keter Island, located in Tembeling Tanjung Village, Bintan Regency, harbors a diverse mangrove ecosystem, predominantly composed of Rhizophora species. This study aimed to assess mangrove density at the tree level, evaluate vegetation cover, and determine the ecological status of the mangrove ecosystem based on its level of degradation. Field surveys were conducted to obtain an overview of ecosystem conditions, followed by systematic random sampling at sites within Tembeling waters where mangroves are distributed. The results indicate that mangrove tree density falls within the medium category, while canopy cover is classified as very dense with good ecological quality. Overall, the mangrove ecosystem on Keter Island is categorized as moderate, although it still displays favorable ecological characteristics. These findings suggest that while the mangrove ecosystem remains in a medium condition, degradation is ongoing, thereby necessitating further research and rehabilitation efforts. Given the vital role of mangroves in sustaining the ecological balance of small islands, direct monitoring and intervention by relevant authorities are essential to reduce degradation and ensure the long-term sustainability of the mangrove forest on Keter Island.
Pendugaan Stok Cumi-cumi Loligo sp. di Perairan Kabupaten Pangkajene dan Kepulauan, Sulawesi Selatan, Indonesia (Stock Assessment of Squid Loligo sp. in Pangkajene and Kepulauan Regency, South Sulawesi, Indonesia) Susiana, Susiana; Rochmady, Rochmady
Jurnal Pengelolaan Perairan Vol. 1 No. 1 (2018)
Publisher : Program Studi Manajemen Sumber Daya Perairan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The objectives of the study were to analyze the sustainable yield level and the optimum catching of the squid Loligo sp. in the waters of Pangkajene and Kepulauan Regency, South Sulawesi, Indonesia. The study was conducted from April to May 2013 by collecting production data and catching efforts on squid by type of catch and fishing gear, the period of 2005-2010. Data obtained from the Department of Marine and Fisheries of South Sulawesi Province, Indonesia. Production data and catching efforts are standardized, then continued potential sustainability estimation analysis using the Schaefer and Fox Model. Data analysis was done by comparative descriptive. The results showed that squid in Pangkajene and Kepulauan waters based on Schaefer model approach was obtained by estimation of sustainable catch result 155.2326 tons per year, estimation of optimum catching effort (Fopt) 12,140.8780 trips per year. Based on Fox model approach shows the estimated value of sustainable catch is 131.6589 tons per year, estimation of optimum catching effort (Fopt) is 9,255.0821 trips per year. Based on this, the catching of squid in Pengkajene and Kepualaun waters has not experienced over fishing.Keywords: catch, MSY, Foptimum, FPI, effort standard.
BIOLOGICAL ASPECTS OF MANGROVE CRAB (Scylla serrata) AT THE BELADEN ESTUARY, DOMPAK, TANJUNGPINANG, RIAU ISLANDS Susiana, Susiana; Kurniawan, Dedy; Rochmady, Rochmady; Nurwisti, Isnaini; Rezky, Bintan; Lestari, Febrianti
BIOTROPIA Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2024.31.1.2036

Abstract

Mangrove crab (Scylla serrata) is one of the marine organisms that are of significant economic importance. The habitat is distributed in the coastal areas of Indonesia, within the extensive mangrove ecosystems, such as the estuary of Beladen in Dompak, Tanjungpinang. The Beladen estuary area features a flourishing mangrove ecosystem, which supports a diverse range of crab species, with a particular focus on the populations. Therefore, this study aimed to obtain several aspects of mangrove crab in the Beladen estuary, Tanjungpinang. Sampling by the census method was also carried out once every two weeks from May to June 2022. The results showed that the size composition of mangrove crab had a carapace width (CW) of 70-144 mm. The length-weight relationship reported that female and male exhibited a negative and positive allometric growth pattern (b < 3) and (b > 3), respectively. The proportion of male and female was 63% compared to 37% (sex ratio 1:0.59). The value of gonadal maturity index (GMI) in each size class ranged from 2.6512-7.1445 and 1.8751-6.7979 for male and female mangrove crab. Male and female gonadal maturity levels were predominantly categorized as II and III, indicating that crab with mature gonads was not encountered.
Co-Authors Abdul Rakhfid Abdul Rakhfid, Abdul Achmad Noerkhaerin Putra Aditya Hikmat Nugraha Ahmad Sabir Ali Usman Alimin Alimin Anshar, Anshar Apriandi, Azwin Bernhard Katiandagho Bim Aprilyanto Budiyanti Budiyanti Daza Septian Nugraha Dedy Kurniawan Depitra, Depitra Dewi Susilawati Dilla Sahilla Dilla Sahilla Edo Edo Edo Edo Erna Erna Erna Ernawati Ernawati Ernawati Fatma Chairda Yani Febrianti Lestari Fendi Fendi Fendi Fitriani Fitriani Fitriani Hardi Wiradinata Hardi Wiradinata Kamal Rudin Karyawati Karyawati Karyawati Karyawati Karyawati Karyawati Karyawati Karyawati Karyawati, Karyawati La Lili La Saluddin Lodewyck S Tandipayuk Lodewyck S Tandipayuk Lubis, Latif Lukman Daris Mahuris, Aziz MARIA BINTANG Mario Putra Suhana Massiseng, Andi Nur Apung Mauga, Rifai Maulit, Julham Mosriula Mosriula Mosriula Mosriula, Mosriula Muh. Anshar Amran Muhammad Bakri MUHAMMAD BAKRI Muhammad Zayani Ihu Niartiningsih Andi, Niartiningsih Nurwijayanti Nurwisti, Isnaini Pangga Kurnia Dialam Rapita Rapita Rapita Rapita Rapita, Rapita Rezky, Bintan Rifai Mauga Sabir, Ahmad Sahilla, Dilla Samsibar, Samsibar Sarfiani Sarfiani Sarfiani Sharifuddin Bin Andy Omar Sulaeman Sulaeman Susiana Susiana Susiana Susiana Ula, Mosriula Ulfa Rianti Umar Tangke, Umar Wa Ode Halida Wa Ode Halida Wa Ode Halida Wa Ode Halida Wa Ode Nanny Kulsum Wa Ode Sry Wulan Wahyu Muzammil Wulan, Wa Ode Sry Yani, Fatma Chairda Yuri Indriyani