Jurnal Teknologi Perikanan dan Kelautan

IDENTIFIKASI SAMPAH LAUT (MARINE DEBRIS) DI PANTAI PINTU KOTA DAN PANTAI AIRLOUW, KOTA AMBON

Muhammad Tarmizi Kubangun, Intan Rabiyanti, Agus Wahyudi, Kamal Mewar — Wed, 29 May 2024 13:32:04 +0700

Marine debris consists of solid organic and inorganic materials that do not easily decompose, accumulate, scattering across the sea and beaches. The waste problem remains a fundamental problem that has yet to be resolved in various parts of the world, including Ambon City. The data collection techniques were direct observation and waste sampling. Determination of the research location was adjusted to the tidal schedule in August 2023 at Pintu Kota Beach and Airlouw Beach, Ambon City. Results of the study showed that the types of waste obtained were plastic bottles, plastic cups, plastic pieces, plastic packaging, coconut fiber, dry leaves, logs, iron cans, iron scrap, sandals, pampers, cloth, styrofoam, sponges, paper, and others. The results of measuring rubbish at Pintu Kota Beach and Airlouw Beach fall into the mega-debris (>1 m) and macro-debris (>2.5 cm - <1 m) categories, but most of it is in the macro-debris category (>2.5 cm - <1 m), namely 2 cm - 1.74 m. The mass of waste with a high average yield was observed at Pintu Kota Beach, ranged from 100 g at low tide to 121 g at high tide. Meanwhile, the average mass of waste at Airlouw Beach was relatively low at 58 g at high tide and 61 g at low tide. Plastic waste and non-plastic waste were more commonly found during high flood tide. This is possibly due to high rainfall in the east monsoon in Ambon City, which causes currents and waves to carry garbage up to the coast.

PENINGKATAN PERTUMBUHAN IKAN LELE (Clarias gariepinus) DAN IKAN NILA (Oreochromis niloticus) MELALUI BIOPELET

Wed, 29 May 2024 14:02:31 +0700

Biofloc material in aquaponics has been successfully produced into biopellets. However, the efficacy of these biopellets in enhancing fish growth and survival requires testing. This research aims to increase the survival and growth of catfish (Clarias gariepinus) and nile tilapia (Oreochromis niloticus), as well as the efficiency of the fish farming system, by utilizing biopellets made from biofloc as feed. The research was conducted using a factorial design method, with three repetitions and two types of treatment, namely fish species (sangkuriang catfish and red tilapia) and pellet types, namely commercial pellets, biopellets, and a combination of both pellets. Fish 5 g weight were kept in an aquarium size 40 x 60 x 40 cm³, with a density of 0.4 fish/L per aquarium. Biopellets formulation was carried out using biofloc and tapioca flour in a ratio of 7:5. Fish were fed 2 times a day. The variables measured were survival and growth rate, both in weight and length. A significant interaction (p: 0.035) between fish species and feed types was observed in the fourth week, where the combination feed was significantly higher (p: 0.042) than the biopellets for both types of fish. This shows that biopellet can produce good growth and survival rates when combined with commercial pellets. However, the combination feed did not perform the highest efficiency in both types of fish.

KARAKTER MORFOLOGIS DAN KOMPOSISI UKURAN UDANG GALAH HASIL TANGKAPAN BUBU DI SUNGAI KAYAN, KABUPATEN BULUNGAN

Wed, 29 May 2024 14:39:08 +0700

The morphological characters are important information in the enrichment of scientific data of species in taxonomy knowledge and understanding the size variations associated with fishing activity aspect and its environment. The utilization of giant prawns in Kayan River produces many kinds of sizes and morphologic characters with have not been scientifically reported. The research aims to analyze the morphological characters and size composition of giant prawns (Macrobrachium spp.) in Kayan River, Bulungan Regency. The research was carried out from January to March 2023. Sampling was conducted 12 times with 30 individuals per sampling (a total of 360 individuals). Data collected include sex, chela pereiopods, color, abdomen, carapace, rostrum, uropods, walking legs, swimming legs, and genitals. The research results showed that the characteristics of shrimp patterns were bluish-green, brownish-green, yellowish-green, and white-green. Male and female prawns had similarities in the 5 greenish blue pole segments and brown claw tips a mud-like shape with a rough texture, and leg spines with 5 walking legs, and 5 swimming legs, but the difference between the claws and spines was that the male has bigger. The total length composition was formed into 9 classes with a size range of 8.4-26.2 cm, carapace length range of 2.9-9.9 cm, abdomen length of 5.4-14.5 cm, and weight composition of 5.0-245 g.

ASOSIASI KUDA LAUT (Hippocampus sp.) PADA EKOSISTEM LAMUN DI PESISIR UTARA PULAU BINTAN

Nur Hasikin, Fadhliyah Idris, Aditya Hikmat Nugraha — Thu, 30 May 2024 08:29:57 +0700

Bintan Island is one of the areas in Indonesian waters where the seagrass ecosystem is distributed. The seagrass ecosystem serves as habitat for maintenance and spawning for various marine biota, including seahorses. At least seven types of seahorses are reported to live in the waters of Bintan Island. This research aims to determine the type and cover of seagrass, identify the type and the density of seahorses in the seagrass ecosystem, and determine the relationship between the condition of the seagrass ecosystem and the presence of seahorses in North Bintan waters. This research was carried out on May-June 2023 the north coast of Bintan Island. There are three stations in this research: Sebong Pereh, Sebong Lagoi, and Sakera. Seagrass cover was taken using the quadrat transect method, and seahorse data collection was carried out in the seagrass ecosystem observation area using the visual census method on transects measuring 100x100 m. Seven types of seagrass were found in this study, dominated by Enhalus acoroides and Thalassia hemprichii. The highest seagrass coverage was found in Sebong Lagoi Waters (60.61%). Two species of the seahorses are found in this study, namely Hippocampus kuda and Hippocampus comes. Hippocampus kuda was more dominant than Hippocampus comes. Based on PCA analysis, there was a relationship between seahorse density and seagrass coverage. The high seagrass coverage has an impact on the high density of seahorse.

DETERMINASI STRUKTUR STOK IKAN KEMBUNG LELAKI MENGGUNAKAN METODE PCR-RFLP DI WPP-NRI 711, 572, DAN 573

Dinda Febta Meliyana, Ali Mashar, Zairion Zairion — Thu, 30 May 2024 08:53:14 +0700

The Indian mackerel (Rastrelliger kanagurta) has important economic value for fishers. High exploitation pressure affects the existence of stocks and balance of the fish in nature. The effectiveness of fisheries management needs to be done, namely by studying a stock structure. A study on the stock structure with genetic analysis can show the genetic status of the stock and gene flow in each stock in the population. This information can be used for the basis of fisheries resource management. The study aims to analyze diversity and genetic structure, as well as stock structure of Indian mackerel in IFMA 711, 572, and 573 using a molecular approach. DNA isolation and extraction yielded 20 total DNA per site (six locations), and it was amplified by PCR method. There were 109 of 120 samples of PCR result which continued to the RFLP stage. The results of the single band cutting process by restriction enzyme (RFLP) were identified using the Popgene32 program. Enzymes that can show polymorphism are AluI and HaeIII. The Indian mackerel stocks from IFMA 711, 572, and 573 are genetically close, indicating that they are a single stock unit. However, genetic distance visualized by dendrogram shows the stock forms two separate clades. It is more effective for statistical purposes to have a separate management unit.

PENGUKURAN KEMAJUAN PELABUHAN PERIKANAN DI INDONESIA

Thomas Nugroho, Mulyono Mulyono, Ernani Lubis, Didin S. Damanhuri — Mon, 03 Jun 2024 10:54:25 +0700

The existence of fishing ports are expected to support the national logistics system of fish, starting from production, storage, and distribution so that it can control prices and meet the raw material needs of the domestic fish processing and consumption industry. However, in its development, the existence of fishing ports in Indonesia has not become an attraction as a landing place for caught fish due to limited market access, so the production of fish landed and sold at fishing ports is lower than outside fishing ports. The research method applied was quantitative using production indices and fish production value, production concentration, export share and shift-share analysis, and productivity index. The aim of the research is to measure the progress of fishing ports at a macro level. The research results obtained show that the amount of production and production value of fish landed fluctuates. This shows the uncertainty a number of fish production landed at fishing ports in Indonesia. The production increase index and average production value per species of fish were 49.26 and 96.52 percent, respectively. The production volume of fish landed was concentrated in type C and D fishing ports. The export market share for fresh chilled fish commodities were dominated by markets in neighboring countries, namely Malaysia, Singapore, Japan, and China. In terms of technical efficiency and costs, the value obtained was less than one. The research conclusion is that fishing ports in Indonesia have not developed stagnantly and tend to experience setbacks.

POTENSI BAHAYA AKTIVITAS BONGKAR MUAT KAPAL JALA JATUH DI PELABUHAN PERIKANAN NUSANTARA MUARA ANGKE JAKARTA

Rafi Dwi Ananda Putra, Budhi Hascaryo Iskandar, Wazir Mawardi — Mon, 03 Jun 2024 12:55:28 +0700

Jala Jatuh Fishing Boat is the second most numerous squid fishing vessel at Muara Angke Fisheries Port. Unloading is the main activity conducted after the vessel docks at the pier. This activity is suspected to have the potential for work accidents, thus requiring the identification of potential hazards in this loading and unloading activity. This study aims to identify loading and unloading activities on Jala Jatuh Fishing Boat, calculate the hazard consequences for each loading and unloading activity on the ship, and provide recommendations to maintain safety and prevent accidents that can occur to workers involved in the process. The methods used in this research were observation and interviews with the captain, crew members, and cargo handlers. The analysis included descriptive analysis and grouping of the hazard consequences of each activity based on AS/NZS 4360: 1999 where there are five types of hazard consequences. The research findings indicated that there were 71 activities involved in the unloading process. Among these, 8 (11%) activities were categorized as non-hazardous, 40 (56%) activities as mild hazards, 19 (27%) activities as moderate hazards, 0 (0%) activities as severe hazards, and 4 (6%) activities as fatal hazards. Attention should be given to occupational safety during the unloading activities, such as ensuring the availability of personal protective equipment (PPE), especially during the unloading process, and having certified drivers to prevent fatal accidents.

OBSERVASI DAERAH PENANGKAPAN IKAN DI PERAIRAN LAUT JAWA DAN SELAT MAKASSAR

Tue, 04 Jun 2024 08:47:35 +0700

Fishing grounds in the Java Sea and Makassar Strait are important fishing areas for fishermen. The aim of this research is to analyze the process of determining fishing ground (DPI), explain the results of observations of water temperature and salinity in each DPI that has been determined, and identify the type of catch, using the Tirta Putra Kencana I Fishing Boat (fishing equipment purse seine). This research was conducted at Java Sea and Makassar Strait from December 2022 until April 2023. The research methodology employed was observation and the analysis used was descriptive analysis. Primary data were obtained through on-site observations, including the determination of FG and the measurement of temperature, and salinity at each FG location. The selection of FG is based on several criteria, including fishing license areas, non-interference with commercial shipping, safe water conditions, and minimal impact from adverse weather in the region. Temperature and salinity measured indicated that, on average, the Java Sea and the Makassar Strait waters exhibited similar characteristics. However, FG near the coastline showed lower temperatures and higher salinity levels. The predominant catch consists of shortfin scad (Decapterus macrosoma) dan Indian scad (Decapterus russelli) inhabiting offshore waters, followed by coastal species such as Indian oil sardine (Sardinella sp.). Large pelagic fish species were more commonly captured in the western fishing grounds.

PERBANDINGAN NILAI TARGET STRENGTH IKAN GABUS (Channa striata) DAN IKAN LELE (Clarias gariepinus)

Octa Risandes, Arthur Brown, Isnaniah Isnaniah — Tue, 04 Jun 2024 08:31:48 +0700

Catfish has an elongated and slender body, with a relatively large head and a wide mouth. Its skin is smooth and dark, often leaning towards black or bluish-gray, adorned with small white spots. On the other hand, snakehead boasts fine, greenish-gray scales with small black spots on its dorsal and lateral sides. Snakehead possesses well-developed swim bladders, whereas catfish has underdeveloped ones. The objective of this research is to measure the Target Strength (TS) values of catfish and snakehead based on their length and weight, as well as to compare the TS values between the catfish and snakehead concerning their swim bladders using a splitbeam echosounder. The measurements were conducted ex-situ in a water tank, with the fish tethered using monofilament lines, maintaining a distance of approximately 1 m between the transducer surface and the fish. The results of this study revealed that the average TS value for catfish was -55.79 dB, while snakehead fish exhibited an average TS value of -50.89 dB. The higher TS value of snakehead could be attributed to their larger size in terms of length and weight. Additionally, snakehead is well-developed swim bladders played a role in this discrepancy, whereas catfish, despite having swim bladders, had them in an underdeveloped state and exhibited smaller dimensions in both length and weight.

BIOLOGI REPRODUKSI IKAN PEPETEK (Leiognathus equula) DI PESISIR PERAIRAN CILINCING, JAKARTA UTARA

Wed, 05 Jun 2024 15:01:59 +0700

Ponyfish (Leiognathus equula) is one of the demersal fish that is widely caught in the coastal waters of Cilincing and has quite significant value because it is consumed by most of the Cilincing community both in fresh and dried form. This study aims to analyze the reproductive aspects of the fish. Sample data collected include total length, weight, and reproductive aspects. This research was conducted in March-July 2023. Fish samples were collected using gill net (mesh size 1-2 inches). The results obtained a total of 150 ponyfish (52 males and 98 females), the length-weight relationship of the fish was W = 0.1682L^2.0979 (males) and W = 0.0169L^2.9941 (females). The gonad maturity of female ponyfish spread from maturing to mature gonads, and gonad maturity stage of male ponyfish spread from immature to mature gonads. Based on gonad maturity and gonad somatic index, spawning occured around June and July. Fecundity of ponyfish ranged 108,287-362,667 oocytes. Oocytes diameter ranged 0.18-0.514 mm, based on the distribution of oocytes, ponyfish is thought to have a total spawner type.