Journal of Tropical Fisheries Management

The Relationship between Seagrass Type Density and CO2 Emissions in Negeri Waai Waters, Salahutu District, Central Maluku Regency

2024-02-20T13:30:30+07:00

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.

Optimizing The Potential and Development Strategy of The Mangrove Ecotourism Area in Tangkolak Village, Karawang Regency

2024-02-20T14:25:03+07:00

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).

Reproductive Biology of Baronang Fish (Siganus guttatus, Bloch 1787) in the Seribu Archipelago, Jakarta

2024-02-20T14:30:28+07:00

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.

Sustainability Status Analysis of Seaweed Cultivation (Eucheuma cottonii) in Barru Regency: Rap-Seaweed Modification Method

2024-02-20T14:34:12+07:00

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

Analisis Pola Pertumbuhan Ikan Ekor Kuning (Caesio cuning) Yang Didaratkan Di Kawasan Pelabuhan Ikan Muara Angke, Jakarta

2024-03-14T11:04:50+07:00

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.

Water Quality in the Habitat of Sembilang Fish (Plotosus canius) in the Estuary of Langsa City

2024-03-26T15:29:15+07:00

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.