Haridhi, Haekal Azief
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Population and distribution pattern of Poropuntius tawarensis in Lake Laut Tawar, Central Aceh Regency Rahman, Mufti Aulia; Abdullah, Abdullah; Safrida, Safrida; Sarong, Muhammad Ali; Haridhi, Haekal Azief
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 13, No 3 (2024): DECEMBER 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.3.40292

Abstract

Poropuntius tawarensis is an endemic fish of Laut Tawar that is currently classified as Endangered according to the IUCN Red List. The decline in its population is caused by habitat degradation, overfishing, and the introduction of alien species that act as predators This study aims to analyze the diversity and distribution patterns the population of kawan fish (Poropuntius tawarensis) in Lake Laut Tawar, Central Aceh Regency. Fish samples were collected from four different locations and analyzed using the Shannon-Wiener and Morisita indices. The results indicate that the diversity level of kawan fish (Poropuntius tawarensis) is classified as a "Low level of diversity," with significant differences between sampling locations. All locations (Hakim Balai Bujang: 0.796845; Toweren: 0.301815; Kelitu: 0.753952; Kala Segi: 0.467728) show a low level of diversity, which is H' 1. Analysis using the Standardized Morisita Index indicates that the distribution pattern of kawan fish (Poropuntius tawarensis) in the four study locations tends to be clumped dispersion. This is evidenced by Morisita index values greater than 1 at all sites (Hakim Balai Bujang: 1.2834; Toweren: 1.0212; Kelitu: 1.0053; Kala Segi: 1.0134). These values suggest that the fish tend to concentrate in specific areas within each village rather than being evenly distributed.Keywords:Poropuntius tawarensisLaut Tawar LakeDiversityDistribution Patterns
Population and distribution pattern of Poropuntius tawarensis in Lake Laut Tawar, Central Aceh Regency Rahman, Mufti Aulia; Abdullah, Abdullah; Safrida, Safrida; Sarong, Muhammad Ali; Haridhi, Haekal Azief
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 13, No 3 (2024): DECEMBER 2024
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.13.3.40292

Abstract

Poropuntius tawarensis is an endemic fish of Laut Tawar that is currently classified as Endangered according to the IUCN Red List. The decline in its population is caused by habitat degradation, overfishing, and the introduction of alien species that act as predators This study aims to analyze the diversity and distribution patterns the population of kawan fish (Poropuntius tawarensis) in Lake Laut Tawar, Central Aceh Regency. Fish samples were collected from four different locations and analyzed using the Shannon-Wiener and Morisita indices. The results indicate that the diversity level of kawan fish (Poropuntius tawarensis) is classified as a "Low level of diversity," with significant differences between sampling locations. All locations (Hakim Balai Bujang: 0.796845; Toweren: 0.301815; Kelitu: 0.753952; Kala Segi: 0.467728) show a low level of diversity, which is H' 1. Analysis using the Standardized Morisita Index indicates that the distribution pattern of kawan fish (Poropuntius tawarensis) in the four study locations tends to be clumped dispersion. This is evidenced by Morisita index values greater than 1 at all sites (Hakim Balai Bujang: 1.2834; Toweren: 1.0212; Kelitu: 1.0053; Kala Segi: 1.0134). These values suggest that the fish tend to concentrate in specific areas within each village rather than being evenly distributed.Keywords:Poropuntius tawarensisLaut Tawar LakeDiversityDistribution Patterns
Implementasi Mask R-Cnn Pada Perhitungan Persentase Tutupan Karang Untuk Memantau Ekosistem Terumbu Karang Maretna, Cut Nadilla; Husaini; Haridhi, Haekal Azief; Alkhalis, Naufal; Nur Fadli; Haditiar, Yudi; Nanda, Muhammad; Ulfah, Maria; Kris Handoko; Intan Malayana; Arsa Cindy Safitri
Jurnal Teknologi Informasi dan Ilmu Komputer Vol 12 No 4: Agustus 2025
Publisher : Fakultas Ilmu Komputer, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25126/jtiik.124

Abstract

Terumbu karang memiliki peranan penting bagi kehidupan di laut. Namun, ekosistem terumbu karang sangat rentan mengalami kerusakan karena sejumlah faktor seperti aktivitas manusia, perubahan iklim, lambatnya laju pertumbuhan dan sebagainya. Upaya pelestarian terumbu karang telah dilakukan, namun pemantauan masih minim. Oleh karena itu, pemantauan ekosistem terumbu karang perlu ditingkatkan untuk mengetahui kondisi terumbu karang sebenarnya. Persentase tutupan karang adalah indikator yang perlu diketahui sebagai penentuan tingkat kehidupan terumbu karang. Proses pemantauan terumbu karang saat ini masih dilakukan secara konvensional, sehingga proses pemantauan tidak efisien dan perolehan informasi mengenai persentase tutupan karang membutuhkan waktu yang panjang. Penelitian ini mengimplementasikan algoritma Mask Region Convolutional Neural Network (Mask R-CNN) pada library Detectron2 untuk melakukan deteksi dan segmentasi objek tutupan karang pada ekosistem terumbu karang dengan menggunakan citra terumbu karang sebagai input. Model yang digunakan untuk segmentasi instance pada citra terumbu karang ini dilatih dengan menggunakan backbone Residual Network (ResNet) dan Residual Networks Next (ResNeXt) yang terdapat pada library Detectron2. Model backbone dievaluasi berdasarkan matriks presisi dan recall. Hasil penelitian menunjukkan ResNeXt101-FPN merupakan backbone terbaik dalam menghasilkan segmentasi. Hasil proses segmentasi tersebut kemudian digunakan untuk menghitung persentase tutupan karang. Berdasarkan hasil perhitungan, persentase tutupan karang dengan data yang diuji adalah sebesar 86,06%. Dengan demikian, proses perhitungan persentase tutupan karang untuk memantau ekosistem terumbu karang dapat dilakukan dengan efisien dan informasi mengenai persentase tutupan karang dapat diperoleh dalam waktu yang singkat.   Abstract Coral reefs have an important role for life in the sea. However, coral reef ecosystems are very vulnerable to damage due to a number of factors such as human activities, climate change, slow growth rates and so on. Efforts to preserve coral reefs have been made, but monitoring remains minimal. Therefore, coral reef ecosystem monitoring needs to be enhanced to assess their actual condition. The percentage of coral cover is an indicator that needs to be known as a determination of the life rate of coral reefs. The current coral reef monitoring process is still carried out conventionally, so the monitoring process is inefficient and obtaining information about the percentage of coral cover takes a long time. This study implements the Mask Region Convolutional Neural Network (Mask R-CNN) algorithm in the Detectron2 library to detect and segment coral cover objects in coral reef ecosystems using coral reef images as input. The model used for instance segmentation on coral reef images was trained using the Residual Network (ResNet) and Residual Networks Next (ResNeXt) backbones, which are available in the Detectron2 library. The backbone model is evaluated based on precision and recall matrices. The results show that ResNeXt101-FPN is the best backbone in producing segmentation. The results of the segmentation process are then used to calculate the percentage of coral cover. Based on the calculation results, the percentage of coral cover with the tested data was 86.06%. Thus, the process of calculating the coral cover percentage to monitor coral reef ecosystems can be carried out efficiently and information about the coral cover percentage can be obtained in a short time.
Estimation of mangrove sedimentary carbon stock in Deah Raya, Banda Aceh Khairunnisa, Khairunnisa; Rahayu, Adisty; Haridhi, Haekal Azief; Farahisah, Harum; Ulfah, Maria
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 4 (2025): December 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.4.50210

Abstract

Mangrove ecosystems are important blue carbon sinks, particularly through long-term carbon storage in their sediments. This study examined sediment bulk density, organic carbon content, and sediment carbon stock in the mangrove ecosystem of Deah Raya Village, Banda Aceh, Indonesia, which has regenerated following the 2004 Indian Ocean tsunami. Sediment samples were collected at three depth intervals (030 cm, 3060 cm, and 60100 cm) across three stations. Organic carbon content was determined using the Loss on Ignition (LOI) method, and carbon stock was estimated based on bulk density and carbon concentration.Bulk density ranged from 0.52 to 0.93 g cm and increased with depth, reflecting greater sediment compaction and lower organic matter accumulation. Organic carbon content varied across depths and stations, with the highest value (4.77%) recorded at Station 3 at 3060 cm, likely due to fine root biomass and reduced decomposition in anoxic layers. Sediment carbon stock ranged from 14.81 to 29.20 Mg C/ha, which is lower than national and global averages for mature mangrove systems, indicating limited carbon accumulation in this recovering ecosystem. These findings highlight the influence of vegetation structure and sediment characteristics on blue carbon storage and underscore the need for continued protection to enhance future carbon sequestration capacity.Keywords:MangroveSedimentCarbonBanda Aceh
Estimation of mangrove sedimentary carbon stock in Deah Raya, Banda Aceh Khairunnisa, Khairunnisa; Rahayu, Adisty; Haridhi, Haekal Azief; Farahisah, Harum; Ulfah, Maria
Depik Jurnal Ilmu Ilmu Perairan, Pesisir, dan Perikanan Vol 14, No 4 (2025): December 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.4.50210

Abstract

Mangrove ecosystems are important blue carbon sinks, particularly through long-term carbon storage in their sediments. This study examined sediment bulk density, organic carbon content, and sediment carbon stock in the mangrove ecosystem of Deah Raya Village, Banda Aceh, Indonesia, which has regenerated following the 2004 Indian Ocean tsunami. Sediment samples were collected at three depth intervals (030 cm, 3060 cm, and 60100 cm) across three stations. Organic carbon content was determined using the Loss on Ignition (LOI) method, and carbon stock was estimated based on bulk density and carbon concentration.Bulk density ranged from 0.52 to 0.93 g cm and increased with depth, reflecting greater sediment compaction and lower organic matter accumulation. Organic carbon content varied across depths and stations, with the highest value (4.77%) recorded at Station 3 at 3060 cm, likely due to fine root biomass and reduced decomposition in anoxic layers. Sediment carbon stock ranged from 14.81 to 29.20 Mg C/ha, which is lower than national and global averages for mature mangrove systems, indicating limited carbon accumulation in this recovering ecosystem. These findings highlight the influence of vegetation structure and sediment characteristics on blue carbon storage and underscore the need for continued protection to enhance future carbon sequestration capacity.Keywords:MangroveSedimentCarbonBanda Aceh