Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management)
Journal of Tropical Fisheries Management (JPPT) is a scientific journal that is published electronically and in print related to research results, and scientific proposals on biodiversity, fisheries biology, fish stock studies, fisheries policies, ecosystem-based fisheries management, fishing technology, fishery product utilization, trade fish, fisheries management area planning, and local wisdom in tropical fisheries management to realize sustainable fisheries resources. 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Departement of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University
After the article is submitted and published in this journal, it is fully copyrighted by the Journal of Tropical Fisheries Management. If excerpts from other copyrighted works are included, authors must obtain written permission from the copyright owner and give credit to the source in the article. Then, authors or reader is allowed to copy, share, and redistribute articles/material in any form. But it must still include the appropriate source and credit because the article in this journal is licensed by Creative Commons Attribution 4.0 International License (CC BY 4.0).
Habitat and Population Structure of Lobster from Southern of West Java
Losbter is a an important and highly economical resources on Coastal Area, in Indian Ocean, including southern part of Java. The research on there area in Pamengpeuk (Garut), South Cianjur, Ujung Genteng conducting to evaluate of habitat and distribution, water quality and population structure. The research result shown the lobster larvae dominant on coastal and near beach, and adult lobster on deeper zone than larvae, and water quality relatively good. The species dominant found are Panulirus homarus and Panulirus pennicilatus) with composition 48%:52%. The size structure in Ujung Genteng relatively growth rapidly than Cianjur and Pamengpeuk. The finding of lobster research in this area are environmental quality appropriate where P homarus and penniculatus as dominat species, with good growth rate.
Indian Ocean, Environmental Status, Distribution, Composisi and Growth
Copyright (c) 2024 Jurnal Pengeloaan Perikanan Tropis (Journal of Tropical Fisheries Management)
Reproductive Biology Status Reproductive Biology Status of Moonfish (Mene maculata) in Palabuhanratu Bay during West Monsoon
The moonfish (Mene maculata) is a demersal fish with important ecological and economic value. The high use of pitcher fish as food fish has the potential to disrupt reproductive patterns, recruitment and stock availability of pitcher fish resources, for which information on reproductive biology is minimal during the west monsoon. This research aims to analyze the reproductive biology status of moonfish in Palabuhanratu Bay. The research period took place from September 2021 to February 2022 (representing the west monsoon), with a sample of 522 fish. Fish samples were taken using a simple random sampling method at Palabuhanratu Nusantara fishing port. The data was analysis to obtain the sex ratio, allometric growth pattern, spawning season, the reproductive potential, and the size at maturity. Results shown that the sex ratio was 1:0.76, which is dominated by male fish. Moonfish have a negative allometric growth pattern. The peak of spawning season during the study period was in September and October. Reproductive potential ranges from 11,988 to 21,164 eggs. The spawning pattern of moonfish is indicated as total spawner. The result of Spearman-Karber method analysis showed that the size of the first maturity of female and male moonfish (Lm50) was 143 mm and 150.5 mm TL, respectively. So, female moonfish mature gonads earlier than male fish.
Moonfish, Palabuhanratu Bay, reproductive potential, Spawning season
The Boosting the Economy of Mariculture in Marine Conservation Areas to Improve the Economy of Small Islands in the Thousand Islands
Mariculture is a form of blue economy activity that has the potential to produce food supplies, employment, and long-term sustainability. Sustainability is usually determined by the quality of the habitat and environment embedded in conservation programs. The existence of conservation related to mariculture stimulates sustainability as a driver of fish biomass, a healthy environment, and high production. A study on boosting the blue economy in conservation areas is important to determine the ability of conservation to support fishery production. The study was conducted in the Seribu Islands in buffer zones and settlements where aquaculture is already developed. The results show that aquaculture activities do not yet adhere to the principles of the blue economy. In general, an increase in conservation status can increase production to a limited extent. Over 15 years of average aquaculture operations, there has been an increase in income, but it is low yet significant. Similarly, coral cover has not shown significant development, and production increases are only significant when coral cover exceeds 30%. Therefore, it can be explained that improving ecosystem quality is essential to strengthening the blue economy. Keywords: Blue Economy, Conservation, Marine Economy, Seribu Island, Small Island.
Copyright (c) 2024 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management) https://creativecommons.org/licenses/by-sa/4.0
Production Shock Phenomenon: An Overview of (Scomberoides sp; Megalaspis sp; and Decapterus sp) Production in Sunda Strait-Indonesia
In the last decade, fishery production has decreased (production shock) due to causes such as excess effort, climate change, and implications of inappropriate policies. The consequences of the policy also increase the risk and vulnerability of fish stocks and affect food security. This research was conducted in the Sunda-Indonesia Strait in 2019 using production data, efforts, and the results of interviews with fishers in Lempasing Landing Port-Lampung. The analysis carried out included the CPUE trend as an indicator of productivity, MSY analysis, and prediction models of changes in effort patterns in 3 species of Decapterus, Scomberoides, and Megalaspis sp. The results obtained during 2010-2019 show that the three fish species' production has decreased, including efforts. Efforts to catch Decapterus decreased 27.3% per year, Scomberoide decreased efforts by 18.8% per year, and Megalaspis decreased rates of efforts by 14.32% per year. The productivity assessed from CPUE appears to be increasing, which is influenced by a decrease in the effort. Stock potential with the three species' Fox model shows an under fishing status, which means the high stock or low effort. The production that decreases during under fishing indicates a production shock due to reduced fish stocks or decreased fishing capacity. The potential for production shock can increase due to natural disasters and inappropriate policies.
Production Shock, Small Scale Fisheries, Productivity, Food Security, Fisheries Policy, Sunda Strait.
Copyright (c) 2025 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management) https://creativecommons.org/licenses/by-sa/4.0
Density, Water Quality Suitability and Size Distribution of Pokea Clams (Batissa violacea var. celebensis, von Martens 1897) at Lasolo River Southeast Sulawesi
The pokea density and its size distribution are different in every place and time which influenced by water quality. This study aimed to determine the density and suitability of water quality, and size distribution of pokea at Lasolo River, Southeast Sulawesi. Pokea samples were collected randomly in all water segment every month for 1 year in the area of Lasolo River, North Konawe. Some samples of pokea were collected using the wide range of tangge fishing gear (traditional tool/ traditional fishing gear) as much as 6 pull times. In the process of collecting the sample of water quality, it was done simultaneously with the samples of shell. The shell density in every place and time was analyzed using the Mann-Whitney test. The preferences of pokea in water quality were analyzed using Principal Component Analysis (PCA) and Group Analysis (CA) in the package of multivariate statistical program (XLSTAT). The results of this analysis showed that the density of the middle of estuary was significantly different (higher) than its density in the initial and final regions which found upstream (lowest density) and in the estuary area, while the density of pokea was not significantly different in each month of observation. The pokea were dominantly found in small size (1.62-2.10-3.09-3.57 cm). The size of the pokea were distributed in all water segment, which were so many in May and June. The preferences habitat of pokea were the slow-flowing, high-brightness, and deep water.
Batissa violacea, clams, density, size, water quality
Ecoregional Site Study on Small Islands: A case study of the significance of flora for fisheries in the Anambas Islands
The formation of the Anambas Islands was a form of earth's surface dynamics that occurred over millions of years. In the process, there were at least eight land formations on the Sunda shelf. This evolution of the earth's surface led to the emergence of large islands on the Sunda shelf along with small islands around them. This also makes the Sundanese shelf part of the volcano's volcanic route. The Bunguran Formation was a bedrock complex that is thought to originate from deep-sea sediments of the Jurassic-Cretaceous age. The rocks are quite old, indicating that this formation was exposed to the surface and formed islands in the arc of the Anambas Islands group. All of these natural processes create a unique type of ecosystem, namely a rocky beach ecosystem, where the rocks at the study location were large rocks with cliffs on some of the coastlines. Meanwhile, sloping and protected locations allow the dust substrate to mix with sand to create a thin mud that allows mangrove forests to grow. Development in Anambas was carried out to grow the economy in this region. The Regional Government consistently develops in various fields. Some that stand out are the fisheries, tourism, and oil and gas sectors. It was believed that forests play a role in maintaining fisheries stocks on the coast, especially mangrove forests. Because of this, there was a need for a study that could display the flora profile in the Anambas Islands ecoregion. The results of the study show 23 species of flora in coastal forests and seven species of mangroves.
Feasibility of Ray Processing Business in Cilacap, Central Java
Stingrays constitute a demersal fish variety prominently distributed in Indonesia, particularly in Cilacap. The flesh of stingrays is widely consumed and undergoes various forms of processing. In Cilacap, stingrays are notably transformed into salted fish, emerging as export commodities such as fillet meat, leather crafts, bones, fins, and gills. The research conducted on stingray processing aims to assess the business feasibility in Cilacap, Central Java, spanning from March to April 2022, specifically in the Menganti Village. Primary data was garnered through interviews with 10 respondents, comprising both fishermen and stingray processors. The analysis of primary data, focusing on business feasibility, reveals that the stingray processing venture is highly viable. This is evidenced by the Break Even Point (BEP) with an average R/C ratio of 11.6, surpassing the threshold of 1.0, indicative of favorability. The Payback Period (PBP) for the investment stands at four months, with an accompanying average profit of Rp. 396,892,142.9.
Biodiversity and Vulnerability of Fisheries Resources in Berau Bay, West Papua Province
Berau Bay, located in West Papua Province, is one of Indonesia's marine areas rich in biodiversity. This aquatic ecosystem is a crucial habitat for various fish species, which hold ecological and economic value for the local communities reliant on fisheries. However, increased human activities, including intensive fishing, pollution, and climate change, pose severe threats to the sustainability of fish resources in this region. This research aims to assess the biodiversity and vulnerability levels of fish resources in the waters of Berau Bay. The methods used include field surveys, fish sampling, species identification analysis, and calculating the diversity index. The vulnerability levels of fish resources are determined by categorizing their conservation status according to the IUCN Red List. The study results indicate that Berau Bay has a relatively high level of biodiversity with low dominance. The highest biodiversity index value in Berau Bay waters is 3.35, dominated by the families Carangidae and Scombridae. The vulnerability analysis results show that 85.71% have a low vulnerability level. However, several species exhibit high vulnerability due to excessive fishing activities, pollution, and climate change. These findings emphasize the importance of implementing effective conservation measures to ensure the sustainability of fish resources in this area. Efforts to protect habitats, manage sustainable fishing practices, and educate the local community are expected to reduce vulnerability and enhance the sustainability of the Berau Bay aquatic ecosystem.
Biodiversitas, Kerentanan Sumberdaya Ikan, Konservasi Perikanan, Papua Barat, Teluk Berau
Water Quality in the Habitat of Sembilang Fish (Plotosus canius) in the Estuary of Langsa City
Sembilang Fish (Plotosus canius) is one of the fish found in estuarine waters, and it's quite popular with the community. Excessive fishing by the community causes the habitat of sembilang fish to be threatened to decrease. The purpose of this study was to determine the water quality and examine the environmental conditions of sembilang fish in the dry season and rainy season in the estuary waters of Langsa City as the basis for domestication. This study used a descriptive method by collecting water quality data at 3 research stations and collecting fish data that was taken from fishermen's catches in Langsa estuary waters. The results showed that the water quality parameters observed in the dry season and rainy season in the estuary were still in decent condition for the life and existence of sembilang fish. Season greatly affects the body weight of both male and female fish. In the dry season, the female weight ranges from 120–220 g and the male 120–240 g, while in the rainy season, the female weight ranges from 134-572 g and the male 136–260 g.
Domestication, Estuary, Sembilang Fish, Water Quality, Langsa City.
Copyright (c) 2024 Journal of Tropical Fisheries Management
Analisis Pola Pertumbuhan Ikan Ekor Kuning (Caesio cuning) Yang Didaratkan Di Kawasan Pelabuhan Ikan Muara Angke, Jakarta
Yellowtail Fusilier (Caesio cuning) is one of the fish caught by fishermen landed in Kaliadem, which is then sold at Muara Angke Fish Market, Jakarta. (Caesio cuning) has high economic value and has been widely consumed by various circles of society. This study aims to determine the heavy relationship with morphometric variation of (Caesio cuning) to obtained fish growth pattern. The collection of 30 fish samples was carried out in April 2018 with a survey method at the Muara Angke Fish Market. Morphological observations were carried out traditionally using a ruler with 0.01 mm accuracy and weighed using analytical scales with an accuracy of 0.01 gr. The analysis used for morphometric and fish weight measurement data is multiple linear regression. The results obtained that the overall morphometric character affects fish weight by 98.4%, where the morphometric characters in the mouth length (PM) have a positive effect on fish body weight with a p-value of 0.048 and coefficients of 21.843. This figure can be assumed that every time there is an addition to the mouth length of 1cm, it will increase by 21.8gr fish body weight with category positive allometric growth pattern.
Sustainability Status Analysis of Seaweed Cultivation (Eucheuma cottonii) in Barru Regency: Rap-Seaweed Modification Method
Barru Regency is one of the largest seaweed producing areas in South Sulawesi. The sustainability of seaweed cultivation is influenced by various factors, including ecological, economic, social, institutional and technological. This study aims to analyze sustainability status of seaweed cultivation in Barru Regency. The method used is Multidimensional Scaling (MDS) approach which is analyzed by RAP SEAWEED. Several parameters from each dimension were analyzed to assess existing condition of seaweed cultivation in Barru Regency. The results showed that seaweed cultivation in Barru Regency was classified as quite sustainable on social and technological dimensions and was classified as less sustainable on institutional, economic and ecological dimensions. Parameter analysis using stress, R-Square, and monte carlo values shows accuracy of model and attributes are feasible for use in analysis. The results of sustainability status analysis which are still classified as lacking need to be addressed by taking into account several attributes that have high sensitivity in leverage analysis. Evaluation of attributes for increasing sustainability score can be a basic consideration in formulating a strategy for sustainable management of seaweed cultivation in Barru Regency
Eucheuma cottonii, RAP-SEAWEED, seaweed, sustainable
Reproductive Biology of Baronang Fish (Siganus guttatus, Bloch 1787) in the Seribu Archipelago, Jakarta
One important aspect of managing rabbitfish is conducting studies on their reproductive biology. The aim of this research is to examine aspects of the reproductive biology of rabbitfish, which include sex ratio, size at first maturity of gonads, spawning type, spawning season, and reproductive potential. This research was carried out five times, namely from November to December 2014 and April to June 2015 in the Seribu Islands. A total of 210 sample fish were observed, consisting of 64 female fish and 146 male fish. The results showed that the sex ratio of rabbitfish was unbalanced, the growth pattern was isometric, the average reproductive potential of rabbitfish was 96 000 eggs, and the spawning type was total spawning.
reproductive biology, baronang fish, Seribu Archipelago
Optimizing The Potential and Development Strategy of The Mangrove Ecotourism Area in Tangkolak Village, Karawang Regency
The Tangkolak mangrove ecotourism area is one of natural attractions, namely a mangrove forest in Sukakerta Village, East Cilamaya Sub-district, Karawang Regency, West Java Province. The mangrove ecotourism of Tangkolak currently have no management and low visitor. This research aims to describe the potential and identify applicable strategies through internal-external factor analysis within the Tangkolak mangrove ecotourism area. Four station points revealed a potential of 14 mangrove vegetation species and 10 fauna species. The most mangrove species all stations is Rhizophora apiculata, while the dominant fauna is Ciconia sp. The mangrove vegetation in the Tangkolak mangrove ecotourism area exhibits a low diversity index (H') and there’s no dominating species in each stations, whereas the fauna in the area showcases varied diversity index values with Ciconia sp. as the dominant species. Visitors and local fishermen in the surrounding community utilize fishing tools like a fishing rods, traps, and nets when catching fish in the vicinity of the mangrove ecotourism area. The development strategy is determined using SWOT analysis. The results of IFAS and EFAS analyses indicate that the development strategy for the Tangkolak mangrove ecotourism area falls within the coordinates (2.5; 2.6) in quadrant I, signifying a combination of strengths and opportunities (SO strategy).
Potential, Strategy, Mangrove Ecotourism
The Relationship between Seagrass Type Density and CO2 Emissions in Negeri Waai Waters, Salahutu District, Central Maluku Regency
Coastal communities produce both inorganic and organic domestic waste. The waste is partially retained and deposited in seagrass ecosystems and decomposed, which causes the release of CO2 gas. This study aims to analyze the relationship between seagrass density and CO2 gas emissions on the coast of Negeri Waai, Central Maluku Regency. The research method using a cylinder chamber and gas emission analysis refers to gas chromatography analysis (GC-MS) results. The results showed that the largest CO2 emission at station I was found in C. rotundata species at 55.91 mg/m2/hour and the lowest in E. acoroides species at 5.51 mg/m2/hour. While at stations II and III, the largest emissions were found in T. hemprichii species with values of 66.68 mg m2/hour and 33.57 mg/m2/hour, respectively. Meanwhile, the relationship of seagrass density of E. acoroides to CO2 emissions was formulated with y = 11.318x – 8.3343, and the level of correlation was very strong (r = 0.93). The same thing was seen in seagrasses C. rotundata and T. hemprichii with linear regression equations, respectively y = 14.284x + 10.751 (r = 0.9629) and y = 19.085x (r = 0.96 ). It shows that the denser the seagrass, the more organic matter can be decomposed to form CO2 emissions. In addition, high emissions can also be influenced by microalgae epiphytes that respirate, triggering an increase in CO2 emissions in the atmosphere.
CO2 gas emissions, seagrass ecosystems, correlation, climate change.
Morphometric Analysis of Decapterus russelliin Transitional Season 1 Landed at Kaliadem and Muara Angke Fish Market, Jakarta
The aim of this study was to determined reproductive biology (sex ratio, gonad maturity stages, fecundity and size of first maturity) of the sentinel crab (Podophthalmus vigil) in the west Tiworo Strait.Samples were obtained from the bycatch of the crab fishermens using trap.Each sample obtained was indetified thesex,carapace width and body weight were measured. Sex ratio was analyzed using Chi-square test (p<0,05). Gonad maturity levels was observed from changes in gonad morphology and color. The crab fecundity was calculated using the gravimetric method. The crab fecundity was calculated using the gravimetric method. The results of the study obtained a sex ratio of 1: 4.09; showed an imbalance between males and females. The gonad development of male P. vigil was dominated immature gonads, while that of females was dominated by mature gonads. Fecundity of P. vigil ranged from 415,644-3,466,290 eggs, and the size 50% at the first maturity of female crab was 92.29 mm.
Copyright (c) 2023 Journal of Tropical Fisheries Management
Reproductive Biology of Sentinel Crab (Podophthalmus vigil) in The West Tiworo Strait, South Konawe, Southeast Sulawesi
fecundinty, podophthalmus vigil, reproductive biology, sex ratio, tiworo strait
Otolith Growth Ring Pattern of Pangasius polyuranodon from Kampar and Siak River, Riau Province
Juaro (Pangasius polyuranodon) are found in the Kampar River and Siak River in Riau Province. The waters of the Kampar river are still in accordance with the quality standards and the waters of the Siak River are indicated by liquid waste pollution as evidenced by the results of air quality measurements, namely free CO2, BOD, Phosphate which are below the quality standard according to Government Regulation No. 82 of 2001. Decreased air quality can affect fish growth. and from the circular pattern of otolith growth. This study aims to determine the growth pattern of juaro fish in the waters of the Kampar and Siak rivers. This research was conducted in March – June 2019. The research method used a survey method. The otolith was sharpened using the Windarti (2013) method to see the growth circle pattern. Furthermore, the pattern and number of Dark Growth Circles (LPG) were seen using a microscope. 60 fish samples were taken (30 fish from the Kampar River and 30 from the Siak River). The results of the study showed that the LGP muscle of juaro fish from the Kampar River had 1 dark circle, while in the Siak River the darkest circle opened 3 pieces. These results concluded that the growth rate of juaro fish in the Kampar River and Siak River had experienced obstacles/disruptions in their lives.
Juaro (Pangasius polyuranodon), Otolith, Growth Pattern, Kampar River, Siak River.
Budget value of mangrove ecosystem services in The Coastal Area of Dumai City
Mangrove ecosystem services in the coastal area of Dumai City have a value for the availability of goods and services that are utilized by the community in the vicinity. The purpose of the study was to assess the balance of mangrove ecosystem services in the coastal area of Dumai City. The data collection method in this study was a survey and interview method with the help of a questionnaire, besides that, literature review and discussions with mangrove ecosystem experts were also carried out. Data analysis used the identification of mangrove ecosystem services with a fishbone diagram approach and an assessment of the availability of ecosystem services using the bukhard model. The results of the study stated that most of the coastal communities of Dumai City benefited from the existence of the mangrove ecosystem for service providers and regulatory services. The largest service provider provided by the mangrove ecosystem is providing fish and crustacean resources such as shrimp and crabs, while the largest regulatory service that is useful is as a barrier to abrasion and reducing ROB flooding. The results of the assessment of the availability of mangrove ecosystem services indicate that in general the demand for mangrove ecosystem services exceeds the supply/capacity of mangrove ecosystem services (negative value), especially settlements, industries, resorts and hotels, and restaurants. This value states that the potential of the mangrove ecosystem has been utilized beyond the limit, so that sustainable management is needed in the utilization of the mangrove ecosystem.
bukhard model, coastal of Dumai City, mangrove ecosystem services, social-ecological system.
Heavy Metal Content in Green Mussels (Perna viridis) Cultivated in Ketapang Village, Tangerang Regency
The aims of the study were: (1) to test the metal content in green mussels; (2) testing the metal content in seawater for aquaculture activties; and (3) calculating green mussel business income. The research was conducted in May-July 2022 at four locations, three locations in the green mussel cultivation area and the fourth location in the green mussel collection area owned by a fisherman. Selection of sampling locations by purposive sampling. Primary data was collected by field survey methods and interviews with 9 green mussel cultivators. Secondary data was obtained from the Department of Maritime Affairs and Fisheries of the Tangerang Regency and scientific publications, including other research supporting data. Data analysis of metal content in green mussels according to the Indonesian National Standard (SNI) No. 7387-2009; Analysis of heavy metal content in seawater refers to the government regulation No 22 of 2021 concerning on the implementation of environmental protection and management seawater quality standards, especially for marine life; identification of trap catches was analyzed descriptively; analysis of green mussels chart business income using net income (𝜋), R/C ratio, and payback period. The results showed that the metal content in green mussels at location 1 exceeded the threshold value compared to the other three locations; all metal content in sea water does not exceed the threshold value. This means that the mussels can still be consumed by the public and the waters are good for mussel cultivation. Mud grouper is the main catch of traps associated with green mussel cultivation sites and the highest R/C in respondents No. 1 and 6 with a payback period of <3 years, showing that the rate of return on business capital is categorized as fast.
green mussels, heavy metal, Tangerang Regency
Periphyton as a Bioindicator in Pulau Pedalaman Waters, Mempawah Regency, West Kalimantan
Pulau Pedalaman Mempawah Regency is a potential public water area in the form of small lakes and protected forests. Has an important role in the life of microorganisms in waters, but is vulnerable to environmental changes and pollution caused by human activities. This study aims to determine the community structure and saprobity index as well as to determine the condition of the waters based on periphyton in the waters of the Inland Island Region of Mempawah Regency. Sampling and water quality measurements were carried out for 3 months, from September to November 2021 at five research stations. The results showed that 44 genera were identified as belonging to 4 classes, namely Bacillaiophyta, Chlorophyta, Cyanophyta and Euglenophyta. The highest relative abundance of periphyton was Bacillariophyta (84.70%). Followed by Chlorophyta (14.90%), Cyanophyta (0.17%) and Euglenophyta (0.22%). Overall diversity indices from all sampling locations showed high diversity or tended to have fairly stable waters. The saprobity index value was in the light to very light pollution level which was in the Meso/Oligosaprobic and Oligo/mesosaprobic phases.
Periphyton, Bioindicator, Pulau Pedalaman
Mapping of Fish Landing Land Based on Commodities Landed on Banyak Island, Aceh Singkil
Pulau Banyak and Pulau Banyak Barat Districts. play an active role in advancing capture fisheries production, this can be seen from the larger number and size of vessels operated so as to produce larger capture fisheries production. To land and sell their catch, many private entrepreneurs do it in their private holdings, not in government-owned fishing ports. This Tangkahan generally has relatively little land and facilities, but the activities and production are relatively large. This study aims to analyze the catch landed on the Tangkahans of Banyak Island, Aceh Singkil and make a map of the location of the Tangkahans in Pulau Banyak, Aceh Singkil. The method used is in 2 stages, the first stage is conducting a field survey using interview questionnaires, and the second stage is collecting field data (coordinate points of Tangkahan, types of catches and aerial photos of Tangkahan Island many). The location of the research is on Banyak Island, Aceh Singkil. The results of the study showed that there were 12 Tangkahans in Pulawa many, of which 8 units were in Baguk Village and 4 units were in Balai Desai. The catches that landed consisted of Squid, Dencis Fish, Tuna, Coral Anchovy and others. This is because the fishing gear used by Pulau Banyak fishermen is dominated by Bagan.
Inventory of Potential and Community Structure of Mudskipper at Coast of Bahak Indah, Probolinggo- East Java
The coast of Bahak Indah is one of the beaches in Probolinggo Regency where many types of mudskipper are found, but until now, not much is known about the ecological studies related to the mudskipper community. This study aims to inventory the mudskipper community as scientific information for the purpose of habitat conservation. The research was conducted from January to February 2022. Purposive determination of observation stations was based on the presence or absence of mangrove vegetation. Observations at each station used a systematic sampling method with the help of line transects and plots. The data obtained were analyzed including length and weight of fish, species composition, abundance, frequency of presence and Important Value Index. The results of the study found four species of mudskipper, namely: Boleophthalmus pectinirostris, Boleophthalmus boddarti, Periophthalmus chrysospilos and Periophthalmodon schlosseri. All mudskipper populations in mangrove habitats have greater length and weight than coastal habitats without mangrove vegetation. The highest number, species composition, abundance, and frequency of presence of mudskipper species were found in the mangrove vegetated habitat. The highest Important Value Index (INP) was in habitats with mangrove vegetation, namely B. boddarti species with a value of 66.69%, while in coastal habitats without mangrove vegetation, P. chrysospilos species with a value of 73.62%. The results of this study indicate that mangrove vegetation has an important role as an ideal habitat for gelodok fish, so the existence of mangrove vegetation needs to be maintained through conservation and rehabilitation efforts.
abundance, biology index, frequency of presence, mudskipper, species composition
An Ecosystem Approach to Small-Scale Cob Fishery Management through the Assessment of the Fishing Technique Domain in East Bali Waters
Potensi perikanan Karangasem sangat besar dikarenakan terdapat banyaknya sebaran kawasan perikanan tangkap skala kecil di sepanjang wilayah pesisir pantai Karangasem. Tujuan penelitian ini adalah untuk melihat kondisi perikanan tangkap tongkol sekala kecil melalui status domain teknink penangkapan Ikan yang mengacu pada Pengelolaan Perikanan Berpendekatan Ekosistem (EAFM). Berdasarkan hasil perhitungan nilai komposit, status domain teknik penangkapan ikan di Desa Seraya Timur memperoleh skor 68,62. Hasil tersebut mengindikasikan bahwa status EAFM domain teknik penangkapan ikan di Desa Seraya Timur tergolong kategori baik. Namun dari hasil penilaian tersebut masih terdapat dua indikator yang berstatus buruk. Hal ini disebabkan pada penilaian indikator modifikasi alat tangkap >50% hasil tangkapan ikan nelayan di Desa Seraya Timur berukuran dibawah Lm. Dan pada indikator Kapasitas Perikanan dan Upaya Penangkapan menunjukan kondisi yang telah overcapacity
EAFM, fiheries management, fishing techniques, ecosystem, frigate tuna.
Copyright (c) 2021 Jurnal Pengelolaan Perikanan Tropis (Journal of Tropical Fisheries Management)
Management Indicators of Layur Fish (Trichiurus lepturus Linnaeus, 1758) in the Sunda Strait
Trichiurus lepturus has an important role at the tropic level and is an economically important fish. The purpose of this study was to examine management indicators in the form of time series of catches per effort (CPUE), asymptotic length over time, exploitation rate, ratio of first caught length (Lc) to first gonad maturity length (Lm), and spawning potential ratio (SPR). ). The research was conducted in the Sunda Strait, samples of fish landed at PPP Labuan, Banten. The analytical method used is long frequency analysis, surplus production model, and SPR analysis. The number of male and female fish observed was 396 and 299 respectively. The minimum length of male layur fish is 438 mm and 421 mm for females. The maximum length of the male layur is 843 mm and the female is 773 mm. CPUE results tend to increase from 0.416 in 2014 to 1.043 in 2019. The exploitation rate (E) of fish is 0.85 which indicates that it has experienced over exploitation. Asymptotic length 938.33 mm. The whitefish caught for the first time at Lc = 579.5 mm had an SPR of 13.10% and at Lm = 718.5 mm it had a fairly high SPR of 31.7%. Catch size occurs before layur fish spawn. SPR below the biological reference point. However, in 2019 there was an increase in catches allegedly due to a pause in fishing due to the tsunami in 2018.
management indicator, spawning potential ratio (SPR), Trichiurus lepturus
Copyright (c) 2022 Journal of Tropical Fisheries Management
Fishing characteristics and spatial distribution of blue swimming crab size (Portunus pelagicus) in the waters of Pati District, Central Java Province
The increasing Blue swimming crab/BSC fishing activity is a response to the high demand of the international market. One of the potential coastal waters for BSC capture fisheries is Pati Regency. However, biological information related to BSC resources is still limited in this area. Therefore, the purpose of this study is to analyze the characteristics of BSC fishing and the size structure of the caught BSC. The study was conducted from December 2020 to March 2021. The method of data collection is observation and interview with fishermen, while the analysis is carried out descriptively. The location of BSC fishing is divided into 3 zones. The characteristics of BSC fishing locations include those related to the distance from the coastline, technical aspects and types of fishing gear, as well as the operational system of capture. The distance from the coastline in zone 1 is about 1-2 miles, zone 2 is about 2-3 miles, and zone 3 is more than 3 miles. The types of fishing gear used in zone 1 are bottom gill net, zone 2 and zone 3 are trapnet. The operational system of capture in zone 1 and zone 2 is carried out with daily trips, while in zone 3 it is carried out with weekly trips (babang). The distribution of carapace width sizes in zone 1 ranges from 44.00-139.00 mm (average 104.80±11.00 mm), in zone 2 it ranges from 72.10-138.00 mm (average 107.90±12.30 mm), and in zone 3 it ranges from 101.40-177.60 mm (average 126.50±11.50 mm).
Blue Swimmer Crab, Fisheries, Spatial distribution, Pati
Analysis of Lead (Pb) in the Coastal of Kupa Kupa Village, South Tobelo Dictrict, North Halmahera Regency
Human activities in coastal waters such as transportation, industry, tourism, settlements, and agriculture are the main factors that cause changes in water quality. Changes in water quality can be the beginning of pollution if the value of the water quality parameter has exceeded the seawater quality standard. One form of marine pollution is heavy metal pollution, and the metal most commonly found in coastal waters is lead (Pb). Therefore, the purpose of this study is to analyze the content of lead (Pb) on the coastal of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. In this study, sampling was carried out using the purposive sampling method, where the water samples used were taken at predetermined points along the coastal waters of Kupa Kupa Village, South Tobelo District, North Halmahera Regency. Sampling of seawater was carried out using a sampling pole with a water depth of 5 m, then the samples were analyzed according to SNI 6989.8.2009. The results of the analysis are then described qualitatively. The results showed that the quality of the coastal waters of Kupa Kupa Village ranged from 32 – 34°C, salinity 27 – 34 ppt, pH 8.9 – 9.3, DO 7.88 – 7.91 mg/l, brightness 1 – 5.9 m, and current 0.05 – 0.12 ms-1. Meanwhile, the concentration of lead (Pb) in water in the coastal waters of Kupa Kupa Village, South Tobelo District, which is in the range of 0.50-0.78 mg/L, where this concentration has exceeded the seawater quality standards. Thus, the coastal waters of Kupa Kupa Village have been contaminated with lead metal which will be threatening for the life of marine biota and will also have an impact on human health.
Coastal, Content, Kupa kupa, Lead, Tobelo
The Organic Nutrient and Chlorophyll-A Photopigment Variabilities During Coral Bleaching Indication in the Kapoposang Water Park (KWP) Spermonde Makassar Strait
Coral reefs at the Kapoposang’s Water Tourism Park (TWP) Spermonde Island have significant ecological and economical functions but prone to damage and even death. The proneness may occur by the effect of domestic activities or natural disaster. This study aimed to determine the distribution of biological (chlorophyll), chemical (nutrients included nitrate and phosphate) factors in ocean surface water, and to analyze the relationship of biological and chemical factors within coral bleaching event at TWP Kapoposang of Makassar Strait Spermonde. Primary and secondary data carried out during 2000-2020, and data analysis conducted on February to April 2021.The study used time-series data of the Indonesian monsoonal seasons for the last 18-years and Landsat satellite imagery data for coral mapping in 2000, 2005, 2015, and 2020. The results showed that the nutrients distribution tend to horizontally autoctonous and chlorophyll was varying within monsoonal seasons. Finally, nutrient and chlorophyll may be correlated with coral bleaching event at TWP Kapoposang of Spermonde Makassar Strait, respectively.
Kapoposang, autoctonous, chlorophyll, nutrients, coral bleaching
The Population Dynamics of the Exploited White Shells (Meretrix meretrix) at the Kambu River Estuary, Southeast Sulawesi
White shells is one of the types of shellfish that is exploited by the community around the Kambu River estuary whose population dynamics is not known certainty. This study aims to determine the population dynamics of white shells in the Kambu River estuary, Southeast Sulawesi. This research was carried out for six months from August 2021 to January 2022. white shells were collected using garok in all parts of the waters. The shell length was measured using a caliper with an accuracy of 0.05 cm. Data on population structure, growth and mortality of clams was analyzed using FiSAT II version 3,0 software. The results showed that the population structure of white shells were dominated by one size group (young adult) which were distributed. The growth parameters of white shells consisted of asymptotic length (L∞) and growth coefficient (K) were 58,91 mm and 1.1, respectively. Natural mortality (M) of white shells at an annual mean temperature of 28oC was 1,59 yr-1, while fishing mortality (F) and total mortality (Z) of white shells were 3,16 yr-1 and 4,75 yr-1, respectively. The white shells were in an overexploitation condition with an exploitation level (E) of 0,67 yr-1.
Population dynamics, white shells, Meretrix meretrix, Southeast Sulawesi
Condition of Mangrove Bioecology and Their Management: Case Study of Pramuka Island Conservation Area, Karya Island and Panggang Island, Seribu Archipelago National Park
The effectiveness of mangrove management is highly dependent on the knowledge of the condition of mangrove and their environment, which are represented by the mangrove health index and the mangrove environmental quality index. This study aimed to analyze the ecological condition of mangroves in the SPTN III area (Karya Island, Panggang Island, and Pramuka Island) Kepulauan Seribu National Park (Balai Taman Nasional Kepulauan Seribu) area to determine the potential management strategy. This research was conducted in 2020. The analysis carried out were mangrove health and mangrove environmental quality. The Mangrove density in the sapling category throughout the island was very dense category, while the tree and seedling growth categories are only found in a few places. The value of the mangrove environmental quality indicate that the environmental quality of the mangroves in the three islands was in high category (good). The mangrove health index in the three islands in other hand was in low category (bad), though in some places mangroves showed high density. Based on these results, mangrove replantation is the strategy which is mostly recommended for SPTN III.
mangrove ecosystem; mangrove environmental quality; mangrove health; management; Kepulauan Seribu
Potensi Lamun Sebagai Penunjang Ekowisata Bahari di Pantai Ketapang, Desa Batu Menyan, Kecamatan Teluk Pandan, Kabupaten Pesawaran, Provinsi Lampung
The seagrass ecosystem is one of the most productive and important ecosystems. Seagrass ecosystems as ecology for marine biota, fishery production and marine tourism. Tourism is a form of utilizing natural resources for human satisfaction. This research was conducted in September 2021. The research location is on Ketapang Beach, Batu Menyan Village, Teluk Pandan District, Pesawaran Regency, Lampung Province. Ketapang Beach which is a coastal area is used by local residents and business people. In Ketapang Beach, two types of seagrass were found, namely Enhalus acoroides and Thallasia hemperichi. The physico-chemical conditions of the waters are still below the quality standard. The composition of the type of macrozoobenthos is divided into 3 classes, namely Class Gastropods, Bivalves and Asteriodea. The suitability index of the seagrass ecotourism area falls into the appropriate category. The carrying capacity of the seagrass environment is 90 people/day. Overall, Ketapang Beach is suitable for seagrass ecotourism.
Seagrass, Tourism, Land Suitability Index, Environmental Carrying Capacity