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Ichsan Setiawan
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Faculty of Marine and Fisheries Universitas Syiah Kuala Jalan Meureubo No. 1, Kopelma Darussalam Banda Aceh, 23111, Indonesia
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INDONESIA
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan
Published by Universitas Syiah Kuala
ISSN : 20897790     EISSN : 25026194     DOI : 10.13170/depik
Core Subject : Science, Education, Engineering,
Earth & Planetary Sciences Education Engineering
Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is a peer review international journal, this journal is publishing high-quality articles in aquatic sciences and fisheries in general. The aim of the journal is to publish and disseminate the current or new findings of the research, and give a significant contribution to the development of fisheries and aquatic sciences in several topics, but not limited to: Fisheries (Aquaculture, Capture Fisheries, Fish Processing) Aquatic Ecology (Freshwater, Marine, and Brackishwater) Aquatic Biology (Fish, Mollusk, Crustacean, Plankton, Coral reefs) Oceanography.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 563 Documents
 48   49   50   51   52 
Small island seagrass ecosystem management based on ecosystem approach fisheries management principles Mutmainnah Mutmainnah; Yuliana Yuliana; Khamsiah Achmad; Martini Djamhur; Sapta Riani Putri; Edy Miswar; Edwarsyah Edwarsyah
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42665

Abstract

Healthy seagrass beds have high ecological value, characterized by high diversity and even distribution in the water. However, currently, the health condition of seagrass beds is threatened both naturally and by human activities. For example, the loss of seagrass meadows due to human activities in coastal areas, including on Maitara Island, North Maluku Province, Indonesia. The objective of this research is to identify the community structure of seagrass, and the proper management options to minimize negative impacts on damage to the seagrass meadow ecosystem and sustain seagrass resources. The study was conducted in the South Maitara and the North Maitara, during the dry season from September to October 2020 using vertical transect methods. The result shows that the average index of diversity, evenness, and dominance on Maitara Island of 1.0970, 0.6470, and 0.5892, respectively. The beaches of South Maitara and North Maitara have poor diversity, a good category for evenness, and a stable community. Enhalus acoroides has the highest density of 294 ind/m2, followed by Thalassia hemprichii around 287 ind/m2. Based on the ecosystem aproach fisheries management (EAFM) analysis, to effectively manage seagrass ecosystems in Maitara Island, a social development strategy is needed through community awareness, counseling, and capacity building in the management and utilization of seagrass ecosystems in Maitara Island to effectively manage the seagrass ecosystem in Maitara Island, a social development strategy is needed through public awareness, counseling, and capacity building in the management and utilization of the seagrass ecosystem in Maitara Island.Keywords:Seagrasscommunity structurediversitydensityevennessMaitara Island
Identification of environmentally friendly of technology fishing gears in Bireuen District Rizka Maula; Makwiyah A. Chaliluddin; Ichsan Setiawan; Indra Indra; Muhammad Rusdi
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42715

Abstract

Bireuen District has significant potential in fisheries resources. However, the high potential of marine fisheries comes with various threats, such as overfishing and destructive fishing, which can disrupt the sustainability of marine ecosystems. The use of environmentally friendly fishing gear is a crucial aspect of sustainability. This study aims to identify environmentally friendly fishing technologies in Bireuen District. Data collection was conducted using a descriptive method with survey techniques, observations, and structured interviews with respondents. The sampling method employed purposive sampling, selecting respondents based on specific criteria or considerations relevant to the research objectives, with a total of 50 respondents directly involved in capture fisheries in Bireuen District. Data analysis was carried out using a scoring analysis based on nine criteria for environmentally friendly fishing gear, following the guidelines of the Code of Conduct for Responsible Fisheries.The results of the study indicate that fishing gears with very environmentally friendly technology include purse seines, trolling lines, set longlines, pots, and gillnets. Meanwhile, beach seines and trammel nets are categorized as less environmentally friendly.Keywords:Fishing gearEnvironmentally FriendlyCapture fisheriesCCRFBireuen District
The analysis of density and types of mangroves on the coast of Aceh Tamiang district Maharani Maharani; Muhammad Irham; Muhammad Rusdi
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.38567

Abstract

Mangrove plants have the capacity to protect coastlines and inland areas from natural disasters such as hurricanes, cyclones, and tsunamis. Mangroves are one of the most productive marine ecosystems on earth, providing unique habitat for many species, as well as important goods and services for humans. Mangroves are also a spawning ground and nursery ground for various types of marine biota. The mangrove area in the Aceh Tamiang area is currently in trouble because of the many activities such as changing the function of land as ponds, housing, infrastructure development and making charcoal kitchens, which can change the function of the mangroves. For this reason, it is necessary to carry out research with the aim of mapping the distribution of mangrove ecosystems using multi-temporal satellite imagery, classifying mangroves based on their density classes and finding out the type of mangrove that is dominant in the mangrove density. This research uses the Purposive Random Sampling method as a technique for taking several scientific considerations. This research also uses the NDVI (Normalized Difference Vegetation Index) method by categorizing 3 classes in density in the Seruway, Bendahara, Banda Mulia and Manyak Payed Subdistricts in five different periods, namely 2002, 2007, 2012, 2017 and 2022. The results obtained the highest NDVI value was in 2002 at 0.98 with an area of 2152.61 ha (16.52%) and the lowest value was in 2007 at -0.23 with an area of 474.15 ha (4.47%). The total type of mangrove found in Aceh Tamiang District is 27 types. Seruway Subdistrict found the most types of mangroves, around 23 types, and in Banda Mulia Subdistrict, the fewest types of mangroves were found, around 12 types.Keywords:Mangrove ecosystemNDVI methodMangrove densityCoastal LULCMangrove type
Analysis of glucose and amino acid combination for Cherax quadricarinatus growth and characteristics Nurul Mutmainnah; Lidya Lidya; Zulfiani Zulfiani; Fitri Indah Yani; Mayasari Yamin
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.43469

Abstract

Freshwater crayfish (Cherax quadricarinatus) is a valuable aquaculture commodity with relatively easy cultivation. However, low larval survival during early developmental stages remains a major challenge in its farming. This study aims to evaluate the effects of dissolved glucose and amino acid combinations on growth characteristics, molting frequency, and survival rate. The research was conducted in the Greenhouse of the Faculty of Agriculture, Animal Husbandry, and Fisheries, Universitas Muhammadiyah Parepare, using hatchery-produced crayfish larvae. Four dosage combinations were tested: A) 100 ppm glucose + 250 ppm amino acids, B) 150 ppm glucose + 200 ppm amino acids, C) 200 ppm glucose + 150 ppm amino acids, and D) 250 ppm glucose + 100 ppm amino acids, each replicated three times. The results showed that glucose and amino acid combinations significantly affected crayfish length growth. The highest absolute length growth was observed in the 250 ppm glucose + 100 ppm amino acid group. Meanwhile, the 150 ppm glucose + 200 ppm amino acid combination showed the best performance in molting frequency, number of molting crayfish, survival rate, and percentage of surviving crayfish. The optimal treatment for supporting freshwater crayfish growth and development was the 150 ppm glucose + 200 ppm amino acid combination.Keywords:Cherax quadricarinatusGlucoseamino acidsgrowth characteristicssurvival ratemolting
Acoustic target strength measurement of striped goatfish (Upeneus vittatus) Syahrul Purnawan; Henry M Manik; Totok Hestirianoto; Khairul Amri; Agung Prasetiawan; Win Alfi Syahrin; Siddiq Husaini Husal; Said M Faaris; Aqil Hawari
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.44269

Abstract

The Striped Goatfish (Upeneus vittatus) is a demersal species of significant ecological and economic value, particularly for small-scale fisheries in Aceh Province. Accurate biomass estimation and species identification in hydroacoustic surveys rely heavily on precise target strength (TS) reference values. This study aimed to establish reference TS values for U. vittatus by examining the relationship between TS and fish morphology. Specimens collected from northern Aceh waters were measured for total length (TL: 17.328.3 cm) and weight (W, g). TS measurements were conducted using a single-beam echosounder (Simrad EK15) operating at 200 kHz with a pulse duration of 0.16 ms in a controlled water-tank environment. This approach enabled the assessment of TS variability across specimens with different TLs. A robust relationship between TL and weight revealed positive allometric growth (b = 3.2932, R = 0.94) in the study. Furthermore, TS analysis demonstrated a logarithmic increase with TL (R = 0.6459), in alignment with theoretical predictions. These findings contribute to more accurate biomass estimation and support sustainable management strategies for U. vittatus populations in northern Aceh, Indonesia. Future research should encompass a broader range of fish sizes and incorporate additional biological variables to refine TS prediction models further.Keywords:GoatfishAcehLWRTSMullidae
Ecosystem approach to coral fish management domain fishing techniques at PPI Ie Meulee, Sabang City Ayu Sriwulanda; Alvi Rahmah; Imelda Agustina; Ratna Mutia Aprilla; Abel Muammar Mesha
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42412

Abstract

The study was conducted froam June to July 2024 located in PPI Ie Meulee, Sukajaya District, Sabang city, Aceh Province. The data collection methods include primary data (interviews and questionnaire) and secondary data (from relavant institutions and references). The sampling was done using the purposive sampling method with 21 respondents. Data analysis used was ordinal-based on liker 1,2,3 to each indicator, such as destructive or illegal fishing methods, modifications to fishing gear and auxiliary equipment, fishing capacity and effort, catch selectivity, the compliance of the function and size of fishing vessels with legal documents, and the certification of fishing crew members according to regulations. The overall average indicator score are 3. The results of the study showed that the fishing technique domain was categorized as good, with a composite value of 75.00.Keywords:EAFMFishing TechnuquesKota Sabang
Spatial distribution of micronutrients in Pekalongan coastal waters: water quality and environmental impact assessment Roy Andreas; Intan Megasari; Bayu Tricahyo; Mukti Trenggono; Michael Julian Haryanto
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42741

Abstract

The coastal areas of Pekalongan, which are densely populated with activities such as ports, industries, and settlements, are highly vulnerable to changes in water quality due to nutrient distribution. This study aims to explore the distribution patterns and abundance of micronutrients in Pekalongan coastal and their implications for water quality and environmental impacts. Samples were taken from Mrican River, Pencongan River, and Wonokerto Beach. The analysis involved spatial distribution, statistical tests with Principal Component Analysis (PCA), and water quality assessment using CCME-WQI. The results showed that the highest concentrations of micronutrients were found in iron in RW 6 of Mrican River, copper in SW 4 of Wonokerto Beach, and zinc in SW 5 of Wonokerto Beach. Based on the CCME-WQI, the quality of Pekalongan coastal waters is classified as poor, potentially posing a great risk to aquatic biota and the health of humans who consume polluted biota. These findings underscore the urgency of taking mitigation measures against micronutrient contamination in coastal areas.Keywords:Pekalongan CoastSpatial DistributionMicronutrientWater QualityCoastal Waters
Growth pattern and otolith size of Tor spp. (Cyprinidae) Khairiza Lubis; Lydia Ruth Hasianna Manullang; Ferosalina Natasia Saragih; Debi Rausana Nasution; Mufti Sudibyo; Elida Hafni Siregar; Agung Setia Batubara
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42028

Abstract

The threat of decreasing populations of Tor species continues to increase due to intensive fishing, habitat destruction and infrequent cultivation efforts. Monitoring of this group of fish must be carried out routinely to reveal the population conditions of fish. This research aims to reveal the population conditions of fish through an analytical approach to the length-weight relationship and fish otolith size. All fish samples were then taken for otoliths to measure their size and analyzed further using a scanning electron microscope (SEM). The research was conducted in the Tangkahan River, North Sumatra, Indonesia from January-March, 2023. The results showed that 43 samples of T. douronensis, 34 samples of T. tambra, and 24 samples of T. tambroides had b values of 2.853, 2.757, and 2.353, respectively. The b value in this study indicated that the fish had a negative allometric growth pattern. The size of the otoliths of the three Tor species shows that T. tambra has the highest length (the distance measured from the anterior to the posterior of the of sagitta otolith) on average reaching 9.31 mm, while T. tambroides and T. douronensis only reach 1.53 mm and 1.83 mm. The results were confirmed by ANOVA showing significant differences (P 0.05) in the mean value of otolith size based on Tor species, where the otolith size of T. tambra was significantly different compared to the other two species. The condition of Tor species in the Tangkahan River has experienced ecological pressure. This indication was concluded from the results of the analysis of the length-weight relationship of fish which showed b value 3 (negative allometric). The results show that the characteristics and size of the otoliths can differentiate Tor species and facilitate identification efforts related to management and conservation.Keywords:Habitat DestructionNegative AllometricAnterior of Sagitta OtolithPosterior of Sagitta Otolith
Size distribution of Haliotis asinina and abundance of periphyton in tapulaga waters Ermayanti Ishak; Muhammad Taswin Munier; Muhammad Trial
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.42737

Abstract

The Tapulaga waters, located in Soropia, Southeast Sulawesi, are among the coastal waters with significant potential for the seven-eyed abalone (Haliotis asinina). This species is a herbivorous gastropod that primarily consumes natural food sources such as periphyton and macroalgae. This study aims to determine the size distribution of H. asinina and analyze the presence of periphyton on seagrass leaves and macroalgal thalli. Sampling was conducted over six months in the Tapulaga waters of Soropia, Konawe Regency, Southeast Sulawesi, using a simple random sampling technique. The collected data were analyzed using descriptive statistical methods. The results indicate that the highest percentage of size distribution was observed in the range of 37.544.5 mm, comprising 34% of the total population. The population was categorized into two size groups: juveniles ( 49 mm) and adults ( 50 mm). Juveniles accounted for 75% of the total H. asinina population, while adults comprised 25%. A total of 11 periphyton species from three taxonomic classes Bacillariophyceae, Cyanophyceae, and Trebouxiophyceaewere identified on the seagrass species Enhalus acoroides and the macroalgae Gracilaria salicornia, Padina sp., Halimeda sp., Galaxaura sp., and Gelidium sp. The identified periphyton species included Aulacoseira sp., Nitzschia sp., Synedra sp., Diatoma sp., Fragilaria sp., Navicula sp., Pinnularia sp., Melosira sp., Lyngbya sp., Planctonema sp., and Cocconeis sp. Six of these periphyton species were present on both seagrass and macroalgal thalli. Synedra sp. was the most dominant species, exhibiting the highest abundance at 88,876 individuals/cm. The presence of periphyton as a natural food source attached to seagrass leaves and macroalgal thalli plays a crucial role in supporting the juvenile H. asinina population.Keywords:H. asininaMacroalgaePeriphytonTapulaga
The effect of differences in silvofishery pond types and gender on the growth performance of mud crabs (Scylla serrata) Asep Akmal Aonullah; Annisa Bias Cahyanurani; Andina Chairun Nisa; Diana Putri Renitasari; Asthervina Widyastami Puspitasari; Aditya Brahmana
Depik Vol 14, No 1 (2025): MARCH 2025
Publisher : Faculty of Marine and Fisheries, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/depik.14.1.43295

Abstract

Mangrove crabs are one of the important fisheries commodities in Indonesia which have made a significant contribution to the lives of coastal communities. This study aims to analyze differences in growth performance of mud crabs reared in different silvofishery ponds to find out the effect of gender and to determine the interaction patterns between silvofishery pond type and gender. This research method uses a Factorial Randomized Block Design (FRBD) which consists of two factors, namely pond type (core pond, trench pond) and sex (male, female) so that it has 6 treatment combinations and 3 replications for each treatment. The initial weight of the test mud crab was 70-75 g. Test animals were kept for 56 days in crab baskets. The results showed that the interaction between pond type and sex had a significant influence on daily growth rate and absolute weight growth but did not significantly influence the feed conversion ratio and feed utilization efficiency. Duncan's further tests showed that the type of pond had a real influence on the feed conversion ratio and feed utilization efficiency. The best Feed Conversion Ratio was found in the core pond treatment with 3.80 1.05 with the highest feed utilization efficiency of 27.67 3.23 %.The survival rate shows values that are not significantly different between all treatments (86.67 100%.). The water quality measurement values during the research were still optimal for the growth of male and female mud crabs. Treatment of core ponds with female crabs (T2K2) showed the best performance in terms of daily growth rate and absolute weight growth of mud crabs. Core pond treatment with female crabs showed the highest daily growth results of 0.82% 0.01% and absolute growth of 42.00 1.00.Keywords:Mud crabSilvofisheryCore PondDitch PondGenderGrowth

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