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Nekton
Published by Politeknik Negeri Sambas
ISSN : 27762742     EISSN : 27762734     DOI : https://doi.org/10.47767/nekton
Core Subject : Economy, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science Social Sciences
Penerbitan jurnal NEKTON dua kali setiap tahun, yaitu pada bulan Maret dan Oktober. Ruang lingkup bidang perikanan meliputi agribisnis perikanan, teknologi hasil perairan, budidaya perairan, teknik penangkapan dan pada bidang kelautan terkait ilmu kelautan.
Arjuna Subject : Ilmu Sosial - Ilmu Sosial (Lain-Lain)
Articles 67 Documents
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Reef fish community structure in the waters of small islands Central Bangka Regency Adibrata, Sudirman; Adi, Wahyu; Angelia, Fera; Komarullah, Umam; Dedi, Dedi; Akbar, Arham Hafidh; Maulana, Eka; Sapriyadi, Sapriyadi; Sofyan, Sofyan; Aldia, Dia; Animah, Animah; Ayu, Citra; Gunawan, Robi; Mahatir, Muhammad; Sandri, Sandri; Evitulistiono, Rizki; Febrianto, Febrianto; Efendi, Muhammad Ichsan; Susanto, Agung; Alqodri, Muhammad Faris; Adriyansyah, Nico; Hafizah, Adisti; Ferizal, Jemi
Nekton Vol 4 No 1 (2024): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v4i1.724

Abstract

This study aimed to analyze the community structure of reef fish in the small island waters of Central Bangka. The research was conducted in March 2022 in the waters of Bebuar Island, Ketugar Island, Ketawai Island, and Gusung Asam Central Bangka Regency, Bangka Belitung Islands Province. The coral reef survey method uses purposive sampling and the coral reef fish visual census with data analysis of abundance, diversity index, uniformity, and dominance. In-site water quality measurements included six parameters: temperature, salinity, current, brightness, depth, and pH. The results showed that coral reef cover from 44.60 - 87.00% with the medium to very good category. The abundance of reef fish from 1 to 3 individuals/m2 was dominated by 18 species of the Pomacentridae family. The reef fish diversity index ranged from 2.47 to 2.90, including the medium category. The uniformity index value ranged from 0.79 - 0.94, including the high category, indicating that the species found were evenly distributed across all stations. The dominance index value ranges from 0.07 to 0.15, including low, where no species dominates significantly and the fish are evenly distributed. Temperature, brightness, pH, and salinity are factors that support the growth of coral and reef fish. A water current speed of 0.05 – 0.20 m/s is quite helpful in cleaning coral reefs from mud and can supply oxygen. Water conditions were categorized as good and fulfilled the seawater quality standards.
Conditions of community socio-economic activities in the Lappa Fisihing Landing Base Area, Sinjai District Hamjan, Dewi Febriani
Nekton Vol 4 No 1 (2024): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v4i1.736

Abstract

The Lappa Fish Landing Base located in Sinjai Regency is a type D fishing port that operates daily. The fishing port not only performs fish landing activities but the existence of PPI Lappa Sinjai is known for its various socio-economic activities and is one of the centers of economic circulation in Sinjai. The research aims to find out the socio-economic activities of the community in the PPI Lappa Sinjai Area, to find out how much PPI Lappa contributes to fishermen and the community around the PPI Lappa fishing port, and to find out how the community's socio-economic activities have changed with the existence of the PPI Lappa. A qualitative research method using a descriptive-analytical approach was used. Data collection was conducted using interviews, observations, and documentation. Data analysis techniques included data collection, data reduction, data presentation, and drawing conclusions or verification. This research provides an overview of the socio-economic activities of the community in the PPI Lappa area, Sinjai, which is dominated by production, processing, and marketing activities. PPI Lappa contributes to increasing employment and marketing activities by processing businesses, the UMKM, and tourism. The community makes efforts to use responsible fishing ports to support the socio-economic sustainability of fishing ports.
Catfish growth using maggot supplementary feed in Sambas sub-district Saifullah, Saifullah; Istiqamah, Nur; Sari, Ulia
Nekton Vol 4 No 2 (2024): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v2i2.556

Abstract

Feed is the largest aspect of cost expenditure in the operation of aquaculture activities. One commodity that is widely cultivated is catfish, which is easy to adapt, easy to maintain, and has a faster harvest time. The purpose of this study was to analyze the cost savings of catfish enlargement feed using supplementary Magot feed. Catfish enlargement business with a stocking amount of 3000 tails for Mr. Joko and 2000 tails for Mr. Munazi with a percentage of feed expenditure, namely 62% for Mr. Munazi and 55% for Mr. Joko. Both of them provide additional magot feed resulting in a profit of 1,075,000 IDR, for Mr. Munazi and for Mr. Joko of 2,040,000 IDR, with an R / C ratio value of Mr. Munazi 1.326 > 1 and Mr. Joko 1.463 > 1 so that their business is feasible to run. And can save costs for the procurement of pellets amounting to 1,260,000 IDR, and Mr. Joko 1,600,000 IDR or 38% for Mr. Munazi and 45% for Mr. Joko when compared to using 100% pellets.
Optimizing goldfish hatchery of the oranda variety Carassius auratus to improve cultivation performance at BSD fish farm Iskandar, Andri; Nurfauzi, Eka Haris; Carman, Odang; Indriastuti, Cecilia Eny; Siregar, Budyansah
Nekton Vol 4 No 2 (2024): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v2i2.760

Abstract

The business of cultivating ornamental fish is quite popular because its sales are profitable for cultivators. Ornamental fish also have attractive colors; therefore, many people are interested in this commodity. One ornamental fish commodity that is in great demand is the oranda goldfish Carassius auratus, which has a variety of colors, unique movements, and body shapes. The annual increase in market demand for oranda goldfish reaches 95,000 fish annually, and each year, there is an increase in the production of 3,000 fish of around 3% each year. This study was carried out in an effort to explore technical information on goldfish cultivation so that the information obtained can be disseminated widely and used as a reference source for the community so that it will add value to the benefit of improving sustainable welfare. The results of the study show that the technique of spawning oranda goldfish can be performed naturally using a substrate in the form of a water hyacinth. The average fecundity produced by one female parent oranda goldfish was 6429 eggs, with a presentation hatching rate of 74% and a presentation survival rate of 64%.
Fluxes of carbon dioxide gases (CO2) in the mangrove soil of Passo Village, Ambon City Rahman, Rahman; Ratuluhain, Eva Susan; Fakaubun, Fahrul Rozy; Soukotta, Imanuel Villian Trayanta
Nekton Vol 4 No 2 (2024): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v2i2.856

Abstract

Mangrove ecosystems play a significant role in carbon absorption. However, the accumulation of organic matter in mangrove sediments undergoes decomposition, which triggers the release of CO2 gas flux. This study aimed to analyze the CO2 gas flux in mangrove sediments of Negeri Passo, Ambon City. Gas data collection was performed using cylinder canopies at the three observation stations. Gas was passed through the syringe five times with an interval of 30s. Gas concentration analysis was carried out using the gas chromatography method, while CO2 flux was analyzed with flux equations referring to slope regression, volume and area of the scope, temperature, molecular weight of the gas, ideal gas settings, and time constants based on gas intake intervals. The results showed that the average CO2 concentration in St. 1 was 465.14 ± 96.52 ppm, and was the lowest compared to St. 2 and St. 3 with values of 638.60 ± 90.05 ppm and 630.98 ± 54.09 ppm, respectively. Meanwhile, the average CO2 flux was 50.44 mg/m2/hour. The largest CO2 gas flux was observed at St. 2 at 103.69 mg/m2/hour. Meanwhile, the lowest flux was found at St. 3, which was 16.24 mg/m2/hour. Based on this, it can be concluded that] the mangrove ecosystem in Negeri Passo has a higher concentration of CO2 gas than the average concentration of climate change stabilization scenarios. However, the CO2 flux was lower than that at other locations in the Ambon Dalam Bay area. In addition, the potential for significant carbon sequestration based on the Tier 1 model approach indicated that mangrove ecosystems in this location play an important role in climate change mitigation.
Identification and level of ectoparasite intensity in goldfish (Carassius auratus) at fishery product inspection and certification center fish seed center Ma'arif, Nur Ikhsan; Wirastuti, Aisyah Yoni; Saraya, Muhammad Agsa; Fauziyah, Nasywa Nur; Nofreeana, Andri
Nekton Vol 4 No 2 (2024): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v4i2.861

Abstract

Diseases and parasites that attack the fish body are often encountered in ornamental fish cultivation, so they can reduce the quality of the fish and cause fish death. Ectoparasites are parasites found outside the fish body. This study aimed to determine the type and intensity level of ectoparasite distribution in goldfish (Carassius auratus) cultivated at the Fishery Product Inspection and Certification Production Center (PPISHP) Fish Seed Center (BBI) Ciganjur, South Jakarta. A location survey and random sampling from three different rearing ponds were used. The goldfish samples obtained were 60 fish from three ponds in BBI Ciganjur. The results showed that the highest level of intensity of the Argulus sp. parasite was found in pond 2, the highest level of intensity of the Trichodina sp. parasite was found in pool 1, and the highest level of Lernea sp. parasite intensity was found in pools 1 and 3. The average infection level of each parasite showed that the intensity was relatively low.
Crispy squid product development (Case Study: PT. Cupa-Cupa Snack) Pangandaran Regency Junianto, Junianto; Veronica, Veronica; Anggraeni, Mella; Musthopa, Andrean Alief
Nekton Vol 4 No 2 (2024): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v4i2.865

Abstract

PT Cupa-Cupa Snack is a company in Pangandaran that processes fishery products into snack products, one of which is crispy squid. The number of crispy squid producers in Indonesia is a challenge for companies to develop products to produce innovations that suit market needs and maintain competitiveness. The purpose of this study was to analyze the product development carried out by the cupa-cupa snack company. The study was conducted from August to October 2024. The research method used was the survey method, with interview techniques and observations of crispy squid products that were analyzed descriptively and qualitatively. The results showed that the company has developed in various aspects, such as the addition of raw material suppliers from various regions, the use of faster and more modern production equipment and processes, changing the formulation of non-msg additives that are safe for consumption, using quality aluminum foil packaging, increasing flavor variants, and business-to-business marketing that maintains good and consistent digital presence techniques on various social media, such as Instagram, Facebook, and TikTok, to increase market share and company competitiveness.
Tropical cyclone Lili in the Banda Sea, Indonesia: formation, development, and oceanic interaction Siwasiwan, Moksen; Tubalawony, Simon; Noya, Yunia Anganetjie
Nekton Vol 5 No 1 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i1.919

Abstract

The Banda Sea serves as Indonesia's central region of water mass circulation and receives water flows from the Pacific Ocean, Indian Ocean, and South China Sea. This unique position facilitates significant interactions between the atmosphere and the ocean. This study aims to assess the dynamic factors supporting tropical cyclone Lili's growth in the Banda Sea. This study uses data from the Climate Data Store (CDS) and Marine Copernicus for May 4-12, 2019. The results show atmospheric dynamics, including the presence of low-pressure zones, high air humidity, and other meteorological factors that support the formation and movement of cyclones. During the study period, oceanographic conditions showed varying wind directions from various sources, hindering the wave formation process. Current patterns were observed moving from Australia through Tanimbar waters towards the Banda, Seram, and Timor Seas. In addition, eddy formation was found in Wetar waters, with downwelling processes occurring in the Banda Sea, while upwelling was detected in eastern Seram waters.
Preliminary modeling of tsunami potential in the Tanimbar Islands Ratuluhain, Eva Susan; Noya, Yunita Angnetjie; Kalay, Degen E.; Hukubun, Ronald Darlly
Nekton Vol 5 No 1 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i1.944

Abstract

The Tanimbar Islands are an area of high tectonic activity and are part of the outer arc island chain formed by subduction in the Banda zone. The presence of the Sorong Fault and Tanimbar Fault around the Tanimbar Islands also affects the level of vulnerability to earthquakes and tsunami hazards. The purpose of this study was to predict the tsunami potential and affected area of the Tanimbar Islands. The method of analyzing the height data and predicting the affected area used COMCOT v1.7 software. Model simulations were performed on the domain layer by using linear equations. Earthquake and fault parameter data were obtained from the USGS website using historical earthquakes dated January 10, 2023. Bathymetry data were obtained from the GEBO website at a resolution of 15-arcsecond (464 m). The model simulation results show that the initial wave height value marked by the red contour is 0.22 m and the lowest low tide value marked by the blue contour is -0.4 m. Based on these results, the tsunami potential in the Tanimbar Islands is not dangerous, as the potentially affected areas in the study area are Selu Island, Woluaru Island, Wotap Island, and Molu Island, as well as the small islands in the western part. The simulation results demonstrate the importance of research related to tsunami hazards that may occur in the future so that appropriate mitigation can be planned for the existence of small islands around the Tanimbar Islands.
Analysis of the suitability and carrying capacity of coral reef ecotourism for diving tourism on Karampuang Island, Mamuju District, West Sulawesi Province Arwin, Arwin; Muhammad Askin Putra, Fanella; Machfud Hapitah, Jalil
Nekton Vol 5 No 1 (2025): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v5i1.961

Abstract

Nature tourism is a visit to a tourist spot that is still relatively natural, so it is minimal due to disturbance or pollution. The research objective was to analyze the cover condition, damage status of coral reefs, reef fish species diversity, and carrying capacity of the area for diving tourism development in the Karampuang Island Waters. The research was conducted from August 07 to October 07, 2020, in Karampuang Island, Mamuju Regency, West Sulawesi Province. The land suitability analysis used in the research was guided by the formula and matrix of land suitability for diving tourism and analysis of the area's carrying capacity. Based on the calculation of the research results, live coral cover, with an average of 27.26%, was included in the medium category. With a reef fish diversity index found at four stations ranging from 2.97-3.16, with 12 families, 33 species, and 557 individual fish, Karampuang Island is suitable for the development of diving tourism; the entire research area qualifies as marine tourism, especially diving tourism groups with suitability categories between 88.89-100% and the area reaches 52,740 m2 so that it can accommodate as many as 113 tourists per day.

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