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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 77 Documents
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Marine Macro-Debris Pollution on the Coast of Negeri Haruku Village Juliana Wilmiena Tuahatu; Gratia Dolores Manuputty; Marlin Chrisye Wattimena; Fahrul Rozy Fakaubun
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1108

Abstract

Marine debris is an environmental issue of both national and global concern, particularly marine macro-debris. This study was conducted to determine the level of marine macro-debris pollution along the coast of Negeri Haruku village. Data were collected at three sites considered representative of the Negeri Haruku coastline. A 100-m shoreline transect was used for data collection and divided into 20 segments, from which five segments were randomly selected for sampling. The Clean Coast Index (CCI) was calculated to assess beach cleanliness, while the Plastic Abundance Index (PAI) was used to measure the proportion of plastic debris relative to the total amount of beach debris. The results showed that plastic debris dominated other debris types at all observation sites. This was reflected in the PAI values, namely 4.82 at the site near the river mouth, indicating high plastic density; 1.51 at Hii Beach, indicating moderate plastic density; and 6.09 at Totu Beach, indicating high plastic density. Totu Beach had the highest CCI value of 22.2, indicating a very dirty condition, while the site near the river mouth had a CCI value of 12.6, indicating a dirty condition. In contrast, Hii Beach was classified as clean, with a CCI value of 3.82. A paradoxical pattern was also observed in this study: even at a site with no apparent human activity, debris density was higher (5.55 ± 0.77 items/m²) than at the other two sites. This suggests that the debris may have originated from other locations and been transported by ocean currents. Based on the Clean Coast Index, only Hii Beach was classified as clean, whereas the site near the river mouth and Totu Beach were classified as dirty.
Socio-Economic Study of Traditional Fishermen in Sayolo Village Papua as a Basis for Affirmative Welfare Programs Anna Dara; Hendry Jems Yoel Aidore; La Ode M Aslan
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1112

Abstract

Traditional fishers in coastal areas of Papua face limitations in fishing technology, access to capital, and market access, which contribute to the low welfare levels of fishing households. This study aimed to analyze the socioeconomic conditions of traditional fishers in Sayolo Village, Teminabuan District, South Sorong Regency, and to formulate the need for affirmative programs to improve their welfare. This study employed a descriptive qualitative and quantitative approach through field observations, in-depth interviews, questionnaires administered to 30 fisher household heads, and Focus Group Discussions (FGDs) involving relevant stakeholders. The results showed that 70% of respondents worked as full-time fishers, with educational attainment predominantly at the elementary school level (53%). Average fish catches ranged from 30–45 kg per week during the peak fishing season and declined to 15–20 kg per week during unfavorable seasons. Net income ranged from approximately IDR 200,000 to IDR 650,000 per week, which remained below the Provincial Minimum Wage. Operational cost structures were dominated by fuel expenses, accounting for 45–55% of total costs, thereby increasing income vulnerability among fishers. Existing affirmative programs included fishing gear assistance, fish processing training, and village financial support; however, their implementation remained uneven. The policy implications suggest the need to strengthen fishers’ institutions, improve access to financial capital, provide post-harvest facilities, and promote the empowerment of coastal women based on local resource potential.
The Effect of Suspended Solids on Phytoplankton Abundance and Water Quality Dynamics in Intensive Shrimp Ponds in Kraksaan, Probolinggo, Indonesia Chandika Lestariaji; Aang Setyawan Anjasmara; Indra Febriantoro; Hendra Poltak; Desilina Arif; Asthervina Widyastami Puspitasari; Ahmad Yani; Akbar Falah Tantri; Saidin Saidin; Fataha Ilyas Hasan
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1149

Abstract

Intensive cultivation of whiteleg shrimp (Litopenaeus vannamei) has the potential to increase suspended solids concentrations, which can affect water quality and phytoplankton community structure. This study aims to analyze the effect of reducing Total Suspended Solids (TSS) concentrations through the application of a filtration system on phytoplankton abundance and water quality dynamics in intensive ponds. The study was conducted in intensive shrimp ponds in Kraksaan District, Probolinggo Regency, East Java, using an observational-experimental approach comparing pond conditions without filtration, mechanical filtration, and chemical filtration. The parameters observed included TSS, phytoplankton abundance, and several water quality parameters such as temperature, clarity, pH, dissolved oxygen (DO), salinity, nitrate, and orthophosphate. The results showed that mechanical filtration was able to reduce TSS most effectively with a range of 38–47 mg/L compared to chemical filtration (57–63 mg/L) and without filtration (81–91 mg/L). The decrease in TSS was followed by an increase in water clarity and DO concentration. The highest phytoplankton abundance was found in the mechanical filtration treatment (2,870–3,084 ind/L), followed by chemical filtration (2,121–2,291 ind/L), while without filtration showed the lowest abundance (1,062–1,401 ind/L). These results indicate that reducing TSS through the filtration system increases light penetration, thus supporting phytoplankton photosynthetic activity. Overall, the application of filtration systems, especially mechanical filtration, plays an important role in improving water quality and increasing phytoplankton productivity, thus potentially supporting ecosystem stability and the sustainability of intensive vannamei shrimp farming systems.
Contribution of Fishermen’s Wives to Household Income in Kawal Village, Bintan Regency Gita Pesona; Haidawati Haidawati; Fitria Ulfah
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1114

Abstract

Fisher households are coastal community groups that depend heavily on unpredictable marine catches, resulting in fluctuating household income. This condition encourages fishermen’s wives to participate in economic activities to help meet household needs. This study aimed to analyze the contribution of fishermen’s wives to household income in Kawal Urban Village, Bintan Regency. A quantitative descriptive method was employed, with purposive sampling used to select respondents. Data were analyzed by calculating total costs, total revenue, total income, and the percentage contribution of wives’ income to household income. The results showed that fishermen’s wives engaged in ten types of work: processed food seller, tailor, small-scale retailer, teacher, domestic helper, clothing reseller, fisher, religious teacher, babysitter, and food stall operator. Each occupation had different cost and income structures, resulting in varying contributions to household income. The highest average income was obtained from operating a food stall, while the lowest income came from low-capital service work. The percentage contribution of fishermen’s wives to household income ranged from 7.69% to 51.63%, with the highest contribution from the food stall business.
Relationship of Physicochemical Water Parameters and Sediment Characteristics to the Growth of Eucheuma cottonii Cultivated Using the Longline Method on Karampuang Island, West Sulawesi Chairul Mahfud; Rahmat Januar Noor; Muhammad Aswad; Muh Ansar; Irma Yulia Madjid
Nekton Vol 6 No 1 (2026): Nekton
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i1.1154

Abstract

Seaweed is an economically valuable commodity with the potential to improve the welfare of coastal communities, including Eucheuma cottonii. However, E. cottonii cultivation faces challenges from extreme changes in aquatic conditions and sediment input from river estuaries, which may inhibit its growth. This study aimed to analyze the relationship between physicochemical water parameters and sediment characteristics and the growth of E. cottonii cultivated using the longline method on Karampuang Island, West Sulawesi. A quantitative approach was applied through a field experiment using a completely randomized design (CRD) on three longline stretches over 30 days. Water quality and sediment parameters were analyzed descriptively, while relationships among variables were tested using partial correlation analysis. The results showed that most physicochemical water parameters were within the optimal range, except for current velocity, which was relatively low at 0.11 m/s. Sediment at the study site was dominated by medium sand, with a dynamic daily sedimentation rate ranging from 0.08 to 0.43 g/L/hour. The absolute growth of E. cottonii reached 477.00 g, with an average daily growth rate of 16.66 g/day. Partial correlation analysis showed that the growth of E. cottonii was closely associated with sedimentation rate and salinity. The cultivation of E. cottonii using the longline method on Karampuang Island showed positive growth, supported by suitable physicochemical water conditions, although sedimentation remained dynamic.
Estimation of White Trevally (Decapterus macrosoma) Stock in the Waters of Nusa Laut, Maluku, Indonesia Habib Harlino Rofi Latuconsina; Imanuel Villian Trayanta Soukotta; Fahrul Rozy Fakaubun; Wildan Tino; Milyan Uli Latue; Muhammad Fahrul Barcinta; Domey Moniharapon
Nekton Vol 6 No 2 (2026): Nekton (Issue in Progress)
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i2.1099

Abstract

The potential of marine resources from the Banda Sea, particularly the waters of Nusa Laut, represents an important economic aspect for local fishers. Several fishing fleets targeting scad, including mini purse seine vessels, are widely distributed in the area, with continuous exploitation activities occurring every week. This study aimed to analyze the growth pattern, mortality, and sex ratio of white scad (Decapterus macrosoma) in Nusa Laut waters, landed at Arumbai Market, Ambon. The research was conducted using a survey method from January to June 2025, with a total sample of 150 individuals. Data were analyzed based on growth pattern, fish mortality, and sex ratio analyses. The results showed that the asymptotic length (L∞) was estimated at 24.7 cm total length (TL), with a growth coefficient (K) of 0.61 year⁻¹ and a theoretical age at zero length (t₀) of −0.25 year. The fishing mortality (F) value was 0.46 year⁻¹, the total mortality (Z) was 1.80 year⁻¹, and the natural mortality (M) was 1.34 year⁻¹, resulting in an exploitation rate (E) of 0.25. The sex ratio analysis conducted from February to June indicated that the proportion of male and female fish was in a balanced condition, with a ratio of 1:1. Based on the exploitation analysis, the length corresponding to half of the asymptotic length (L∞/2 = 12.35 cm TL) indicated that the captured fish were still relatively small. Therefore, the biological characteristics of white scad caught in Nusa Laut waters, Central Maluku, and landed at Arumbai Market, Ambon City, indicate that the fish are predominantly captured at a small size with a relatively low exploitation level.
Quality Characteristics of Tuna Trim Surimi Patties with Added Carrageenan: Proximate, Sensory, and Physical Analyses Muh Kasim; Nurlaeli Fattah; Ida Astuti; Daniel Heintje Ndahawali; Rusli Rusli; Sri Wahyuni Firman; Endang Gunaisah
Nekton Vol 6 No 2 (2026): Nekton (Issue in Progress)
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v6i2.1190

Abstract

Tuna trim is a fishery by-product with potential for processing into surimi-based value-added products. This study evaluated the effects of κ-carrageenan concentrations (0.5%, 1.0%, and 1.5% w/w; two replications per treatment) on the proximate composition, sensory characteristics, and physical quality of tuna trim surimi patties. Proximate parameters, including moisture, ash, protein, fat, and crude fiber, were analyzed according to AOAC methods. Sensory evaluation was conducted using a 5-point hedonic scale for texture, taste, color, and flavor, while physical quality was assessed using folding and biting tests. Descriptive statistics were calculated for all parameters, and differences among treatments were analyzed using the Kruskal–Wallis test (α = 0.05) because the small number of replications did not meet the normality assumption required for parametric ANOVA. The results showed that carrageenan addition did not significantly affect any proximate or sensory parameter (p > 0.05). Moisture content ranged from 60.66–63.89%, ash from 1.88–1.94%, protein from 12.27–13.05%, fat from 0.145–0.207%, and crude fiber from 5.97–6.40%. Although the sensory differences were not statistically significant, the 1.0% κ-carrageenan treatment yielded the highest mean sensory scores and the best physical quality, achieving Grade A in the folding test and a chewy texture in the biting test. In contrast, patties containing 0.5% and 1.5% κ-carrageenan tended to break during physical testing. Therefore, 1.0% κ-carrageenan represents the most promising formulation for further development of tuna trim surimi patties.

Page 8 of 8 | Total Record : 77

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