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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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Identifikasi Molekuler Udang Penaeid dengan Pendekatan DNA Barcoding Saleky, Dandi; Dailami, Muhammad; Manan, Jemmy; Manumpil, Abraham Welliam
Nekton Vol 2 No 2 (2022): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (467.987 KB) | DOI: 10.47767/nekton.v2i2.395

Abstract

Penaeid Shrimp (Crustacea: Decapoda) is an important fishery commodity in human life both in terms of economy, ecology, and nutrition. Penaeid shrimp are widely distributed and abundant on the coast of Merauke and become one of the leading commodities in the fisheries sector. The identification problem in the Penaeid shrimp group is a problem that still often occurs today. Identification problems are often not carried out because they are considered unimportant even though they can be important information for conservation and sustainable management. This study was conducted to identify the Penaeid Shrimp from Payum Beach, Merauke Regency, Papua by using a DNA barcoding approach with the Cytochrome Oxidase I Gene. The results of the analysis showed that the species of specimens was Mierspenaeopsis sculptilis (Heller, 1862) with a similarity level of 97.38%. Genetic distance and level of DNA similarity are very influential in phylogenetic reconstruction. Identification with DNA barcoding has succeeded in identifying species quickly and accurately and can be used to confirm previously identified species based on morphological characters.
Identifikasi Spesies Mangrove dengan Menggunakan Sistem Pesawat Udara Kecil Tanpa Awak di Kawasan Ekosistem Mangrove Sedari, Kabupaten Karawang, Jawa Barat Sewiko, Roni; Sagala, Herlina Adelina Meria Uli; Yulandhita, Yulandhita; Pattirane, Chrisoetanto P.
Nekton Vol 2 No 2 (2022): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1888.493 KB) | DOI: 10.47767/nekton.v2i2.397

Abstract

Remote sensing is one of the effective methods of monitoring mangrove ecosystems. One of the challenges in implementing this method is image resolution. Access to large-resolution imagery as a basic material for spatial analysis is not cheap. Unmanned small aircraft systems (SPUKTA) or drones are able to answer these challenges. Orthophotos obtained from the acquisition of drones are capable of producing large-resolution imagery. This method is then implemented in conservation areas, to facilitate the process of identifying mangrove species in the area. The drone was flown at an altitude of 150 m with a pavement value of 85% for 4 flying missions. The result of processing 1614 aerial photos into orthophotos produced images with a GSD resolution of 4.75 cm/pix. These images are then analyzed with on-screen digitization techniques and visual interpretation. From the total area of the study area of 46.48 ha obtained the digitization results of Rhizophora sp. with a total area of 24.68 ha, Avicennia sp. 7.64 ha, dead mangroves 0.19 ha, and non-vegetation 13.97 ha.
Rekonstruksi Tsunami Mentawai dengan Menggunakan COMCOT v1.7 Ratuluhain, Eva Susan; Noya, Yunita A.; Pradjoko, Eko; Rahman, Rahman; Hukubun, Ronald D.
Nekton Vol 2 No 2 (2022): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (793.853 KB) | DOI: 10.47767/nekton.v2i2.403

Abstract

Many studies on the Mentawai tsunami have been carried out. Still, not many have reviewed the validation of run-up height compared to the results of field studies in the same year as the Mentawai tsunami on October 25, 2010. The survey of the Mentawai tsunami reconstruction using COMCOT v1.7 aims to validate The tsunami run-up height of the model output was compared with the results of the field study by the GITST Team in 2010. Validation of the model was carried out using the Aida parameter, by calculating the ratio of the comparison between the model output and the field study results. The study location of the model is divided into 3 layers, namely layer01 covering Sipora Island, North Pagai Island, and South Pagai Island, layer02 covering North Pagai Island and South Pagai Island, and layer03 with the focus of observation on Sibigau Island, with bathymetric resolution used for each layer. 464 m, 232 m, and 77 m so that the propagation at the observation site can be seen clearly. The height of the modeled tsunami ranged from 2.5 – 11.2 meters, with a maximum run-up height observed on Sibigau Island of 11.2 meters, and the time range for the tsunami arriving on land was 5 – 15 minutes. The comparison ratio between the model results and the field study is K = 0.9 and k (standard deviation) = 0.16. Based on the comparison ratio, the model output is close to the actual result.
Diversifikasi Produk Ikan Asap Cakalang (Katsuwonus pelamis) dengan Penambahan Ekstrak Kulit Manggis Terhadap Mutu Sensorik Radjawane, Christy; Badaruddin, M. Iksan; Yekwan, Makdalena
Nekton Vol 2 No 2 (2022): October
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.168 KB) | DOI: 10.47767/nekton.v2i2.405

Abstract

Skipjack fish is a prima donna for Sorong City, West Papua fishing communities. In general, the people of Sorong City process skipjack into smoked fish. The smoking process is carried out using traditional techniques where the smoke source is in direct contact with the raw material, thus significantly affecting the appearance of smoked fish. Using mangosteen rind extract, carried out with a precipitating process before the fish is smoked, will give a more attractive color and appearance. The mangosteen rind extract used can be used as a natural coloring agent to give fish a more attractive color when smoked traditionally. This study aims to determine the effect of mangosteen rind extract on the sensory quality of smoked skipjack and determine the best concentration of mangosteen rind extract on smoked skipjack products. This study uses an experimental method where the research is carried out by giving treatment to the object of research with 3 treatments, 15 panelists, and tested using the Kruskal Wallis test. Statistically, the addition of mangosteen rind extract to smoked skipjack products significantly affected the product's sensory value, and the best sensory test of smoked skipjack products with the addition of mangosteen rind extract was in treatment A2 and the lowest was in treatment A0.
Komposisi dan Kerapatan Jenis Alga di Taman Wisata Perairan Laut Banda di Kabupaten Maluku Tengah Rombe, Katarina Hesty; Rahman, Abdul; Mardiana, Mardiana; Rosalina, Dwi
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.383

Abstract

The purpose of this study was to identify the type of algae, calculate the composition, density, diversity index, similarity index, and dominance index, and measure water quality parameters in the waters of the Banda Sea marine tourism park in central Maluku Regency. The method used in this study is a line transect method and a quadrant frame measuring 1m x 1m. There are 3 stations used with 5 replications each. The results showed that there were three divisions of algae, namely Chlorophyta, Phaeophyta, and Rhodophyta, with details of the species obtained were Amphiroa fragilissima, Boodlea composita, Boergesenia forbesii, Cladophora, Chaetomorpha crassa., Dictyota dichotoma, Gracilaria edulispuntia, Halimeda macrophyopuntia. tuna, Padina australis, Ulva compressa, Ulva reticullata, and Valonia ventricosa. The Chorophyta division of 66% obtained the highest species composition value, the highest density was obtained by the Amphiroa fragilissima species of 0.205. In addition, the ecological index such as (1) the diversity index was in the medium category with a value range of 1.35-1.97, (2) the similarity index was included in the high category with a value range of 0.72-0.86 which indicates that the ecosystem is in a stable condition and the dominance index of the three stations shows a value close to one, namely 0.87-1 which indicates that there is a tendency for one species to dominate. The measurements of water quality parameters such as temperature, salinity, and currents show that they are optimal for algae growth.
Kajian Potensi Usaha Budidaya Ikan Lele (Clarias batrachus) (Studi kasus: “BUMdes Tengguli” di Desa Tengguli Kecamatan Sajad) Januardy, Uray; Saifullah, Saifullah; Hanif, Hanif
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.400

Abstract

Every fishery activity has potential which is highly dependent on the type of business and fishery resources available at the location of the activity. One of them is the potential for cultivating businesses in great demand by the community. The purpose of this research is to examine the potential for catfish farming in tarpaulin ponds at the Tengguli BUMDes. This type of research is quantitative research with a quantitative descriptive study approach. The research method uses financial analysis combined with environmental analysis focusing on water quality. The results of the research based on the financial aspect show that the costs incurred amount to IDR 8,986,166 including fixed costs and variable costs. Meanwhile, the profit earned was IDR 3,013,834/production. The BEP value is 299.5 kg/period at a minimum price of IDR 22,465.41/kg. An RCR value of 1.33 > 1 means efficient and profitable, a marketing margin of IDR 4,000, and a farmer's share value of 99% > 40% means efficient. While from the environmental aspect, the value of pH 5, temperature 29°C, DO 15.4 mg/l, nitrate 0 mg/L, phosphate 1.0 mg/L, and ammonia 0 mg/l did not cross the PP No. 82 of 2001 (class II).
Pengaruh Pemberian Probiotik Lactobacillus sp. dan Bacillus sp. dengan Dosis yang Berbeda pada Media Pemeliharaan Terhadap Pertumbuhan dan Kelangsungan Hidup Udang Vaname (Litopenaeus vannamei) Dewi, Ima Citra; Subariyanto, Subariyanto; Ernawati, Ernawati
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.444

Abstract

In semi-intensive aquaculture, not all the feed given can be digested by shrimp; therefore, appropriate technology, namely, the use of probiotics, is needed. This study aimed to analyze the effect of probiotics in rearing media on the growth and survival of vannamei shrimp and to identify the optimal dose. This study used a completely randomized design (CRD). The variables used were growth rate, survival, and water quality (salinity, temperature, pH, dissolved oxygen, and ammonia). Data analysis was performed using Analysis of Variance (ANOVA). Data demonstrating a significant effect were analyzed using Tukey's continuation test. The results of this study indicate that the administration of probiotics to vannamei shrimp rearing media has a significant effect on the absolute weight and daily growth rate of shrimp. Meanwhile, the survival of vannamei shrimp did not have a significant effect on their growth of vannamei shrimp. The average water quality temperatures were 25 °C in the morning and 27 °C in the afternoon. The average morning pH was 7 and the evening pH was 7, the average salinity was 30 ppt, the DO average was 5.6, and the ammonia average was 0.3. The best dose in the study was treatment C with added probiotics at a dose of 2.5 ml/l.
Analisis Potensi Ekowisata Bahari di Pulau Larea-Rea Kabupaten Sinjai Wahyuni, Ayu; Subariyanto, Subariyanto; Rahmah, Nur
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.445

Abstract

Each region has a different potential depending on its natural resources. Therefore, a separate study is needed to determine its potential; for example, it's potential for marine ecotourism. This study aims to determine potential strategies for developing marine ecotourism on Larea-Rea Island. This study used a descriptive qualitative method. The data collection techniques included observations and structured interviews. Data were analyzed using SWOT analysis by looking at the potential of using the Strengths, Weaknesses, Opportunities, and Threats found on Larea-Rea Island. The results of this study show that Larea-Rea Island has the potential to develop into a marine ecotourism area. The results of the SWOT analysis show that there are four alternative appropriate management strategies for building marine ecotourism on Larea-Rea Island:1) maximizing the promotion of marine tourism on Larea-Rea Island, 2) improving roads to tourist sites, 3) repairing and equipping facilities and infrastructure for tourism activities, and 4) conducting community development to become tour guides and tourism insights, and the importance of maintaining tourist sites.
Pengaruh Tinggi Air dan Padat Tebar yang Bervariasi terhadap Pertumbuhan dan Kelangsungan Hidup Benih Ikan Lele Sangkuriang (Clarias gariepinus) Nurdini, Nurdini; Lahming, Lahming; Patang, Patang
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.465

Abstract

The growth of catfish seeds can be influenced by many factors including high water and seed stocking density. The research objective was to analyze the effect of high air and stocking density of different fish on the growth and maintenance of Sangkuriang catfish fry. This type of quantitative research with an experimental approach. The research was an experiment using a completely randomized design (CRD) factorial. Data processing uses SPSS Version 22 with two-way ANOVA analysis if there are differences, it will be followed by Tukey HSD. The research analysis showed that there was an effect of varying stocking density treatments on the survival of fish fry and absolute growth, while the high air treatment only had an effect on the survival of Sangkuriang catfish fry. The research yielded a water height of 13 cm and a stocking density of 15 individuals/liter was the treatment with the highest survival rate for catfish seeds with a value of 74.4%, while for exclusive weight growth, the treatment was 10 cm water height and a stocking density of 15 individuals/liter of 0.94 g.
Sebaran Jenis Ikan Pelagis yang Ditangkap Menggunakan Pancing Ulur pada Rumpon di Laut Pemangkat Kabupaten Sambas Heriyansah, Heriyansah; Saifullah, Saifullah
Nekton Vol 3 No 1 (2023): March
Publisher : Politeknik Negeri Sambas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/nekton.v3i1.475

Abstract

FAD technology has an indirect impact on the development of fishery stocks, thereby increasing the diversity of fish species in the FAD area. This study aimed to determine the types of pelagic fish caught using handlines around FADs. The target of this study was traditional fishermen. This research was conducted using survey methods and was directly involved in the fishing process. Fishing was carried out using handlines with specifications consisting of the main line, weight, swivel, fishing line, and hook. Fish catch samples were measured every week starting on the fourth week after the FADs were installed, with consideration of the regularity of the sample observation interval, the weather, and the fishermen's readiness. Data analysis was performed using tabulation, and the composition of the number and percentage of each type of catch was analyzed descriptively, which is presented in the form of a picture. The results showed that the types of fish caught were large trevally (Selaroides leptolepis) with an average catch of 10.1 kg/trip, mackerel (Rastrelliger sp.) with an average catch of 4.2 kg/trip, Kuwe (Caranx ignobillis) with an average catch of the average catch is 0.9 kg/trip and lastly the Tetengkek snakehead (Megalaspis cordyla).

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