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Markus T. Lasut
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Jurnal Aquatic Science & Management, Gedung A Lantai 1, Pascasarjana, Universitas Sam Ratulangi, Jln. Kampus UNSRAT Bahu, Manado 95115, INDONESIA
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Sulawesi utara
INDONESIA
AQUATIC SCIENCE & MANAGEMENT
Published by Universitas Sam Ratulangi
ISSN : 23374403     EISSN : 23375000     DOI : https://doi.org/10.35800/jasm.v10i1.37485
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Journal of AQUATIC SCIENCE & MANAGEMENT publishes scientific articles of original research based on in-depth scientific study in the field of aquatic science and management, covering aspects of limnology, oceanography, aquatic ecotoxicology, geomorphology, fisheries, and coastal management, as well as interactions among them.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 4 Documents
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Search results for , issue "Vol. 12 No. 2 (2024): OCTOBER" : 4 Documents clear
Macroalgae community structure on Kumeke Island, East Bolaang Mongondow Regency, North Sulawesi Province, Indonesia Valina, Rahmi; Asthisa, Dias; Pangalila, Novelia M.A.; Timumu, Farhan A.; Kasim, Fitra M.A.
AQUATIC SCIENCE & MANAGEMENT Vol. 12 No. 2 (2024): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i2.58391

Abstract

Macroalgae is one of the potential biological resources in Indonesian waters that has many important roles, from an ecological to an economic perspective. The aim of this research is to analyse the structure of macroalgae communities found in the waters of Kumeke Island, East Bolaang Mongondow Regency, Indonesia. The method used in this research is a survey with descriptive data analysis. Determining the sampling station point is carried out by purposive sampling, namely by selecting an area based on the presence of macroalgae. Macroalgae sampling used the line transect method with a quadratic sampling technique with a size of 1.5 x 1.5 m. The research results showed that the types of macroalgae found were 11 species, consisting of 3 species of Chlorophyta, 4 species of Phaeophyta, and 4 species of Rhodophyta. The density of macroalgae species is dominated by Rhodophyta (38%), Phaeophyta (31%), and Chlorophyta (30%). The total density of macroalgae is 9–46 ind/m². The diversity index ranges from 1.154 to 2.234 in the medium category, the uniformity index ranges from 0.481 to 0.932 in the high category, and the dominance index ranges from 0.114 to 0.338 in the low category.
Assessment of the pollution status of the coastal waters of Kotabunan Village, East Bolaang Mongondow Regency (North Sulawesi Province, Indonesia) using the pollution index (IP) Asthisa, Dias; Valina, Rahmi; Musada, Zulkarnain; Ilahude, Satrio; Lesi, Inka
AQUATIC SCIENCE & MANAGEMENT Vol. 12 No. 2 (2024): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i2.58395

Abstract

This study aims to assess the pollution status of the coastal waters of Kotabunan Village, East Bolaang Mongondow Regency, North Sulawesi Province, Indonesia, using the pollution index (PI). The water quality parameters monitored include temperature, Total Dissolved Solid (TDS), pH, Dissolved Oxygen (DO), and salinity. Analysis of water quality data was compared with class III water quality standards based on Government Regulation Number 22 of 2021. The results of the water quality analysis showed that the temperature ranged from 28.4 - 31.5 0C, TDS ranged from 2100 - 3120 mg/L, pH ranged from 7.93 - 8.24, DO ranged from 2.8 - 6.2 mg/L, and salinity ranged from 18.5 - 34 ppt. Based on these facts, the pollution index of these waters is 2.4 - 6.2 which indicates a light-moderate pollution status.
Business performance evaluation of tuna handlines operated in fish aggregating device areas: a case study in Bone Regency, South Sulawesi Province, Indonesia Pontoh, Peggy; Rumpa , Arham; Asia; Kun, Anang Rahmat; Krisnafi , Yaser; Syamsuddin , Muhidin; Rasdam; Kasim , Muh.; Runtukahu, Muhammad Ikhsan Zulfatan; Baroqi, A. Riza; Timur, Putra Satria
AQUATIC SCIENCE & MANAGEMENT Vol. 12 No. 2 (2024): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i2.59462

Abstract

The difference in fishermen's catches each year tends to fluctuate at different fishing locations; this is due to the still low efficiency and productivity of fishing efforts. The purpose of the study was to evaluate the performance of tuna handline businesses operated in fish aggregating device areas at fishing grounds in FMAs 713 and 714. The results show that in the period of 2020-2023, the development of catch rates each year fluctuated, while the average value of catch rates for each vessel based on the highest season occurred in the East Season and the lowest in the Transition Season I. Likewise, the average catch rate based on the time of the month of capture is highest in June, July, and November. The results of the analysis of production factors that influence the catch are the time of the month of fishing, fuel use, ice use, and number of crew members, while the factors of trip length, ship GT, and engine capacity do not have a direct influence. The information from this evaluation is very much needed by fishermen and stakeholders to optimise the performance of tuna handlines in fish-aggregating device areas.
Dynamics of fish catch results from handline fishing gear and sustainable solutions for tuna fisheries in a rumpon area Soghirun, Muh.; Rumpa, Arham; Kasim, Nurdin; Ohorella, Rafi; Pontoh, Peggy; Baroqi, A. Riza; Satria Timur , Putra Satria Timur; Runtukahu, Muh. Ikhsan Zulfatan; Novita Ayu Wulandari
AQUATIC SCIENCE & MANAGEMENT Vol. 12 No. 2 (2024): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i2.59789

Abstract

Rumpon, as a fish-aggregating device, has long been used by tuna handline fishermen in Bone Bay, South Sulawesi Province, Indonesia. Information on the characteristics of tuna handline fishing in the area is very limited and is very much needed as study material for tuna fishing strategies and fisheries policies. This research aims to understand the results of handline catches and sustainable solutions for tuna fisheries in rumpon areas. The data used is the result of observations using 19 ships based at PPI Lonrae and data collection for 5 years (2018-2022). The results show that the composition of the main catch is dominated by yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus), and skipjack tuna (Katsuwonus pelamis). In general, the size of fish that are not suitable for catching for the yellowfin tuna, bigeye tuna, and skipjack tuna, consecutively, is 54.0%, 45.1%, and 31.9%. This finding further clarifies that the percentage of tuna and skipjack tuna that are not suitable for catching is still very large. Continuous and large-scale fishing of juvenile tuna could cause fish resources to continue to decline in the future. Technically, what fishermen need to understand is, in addition to the strategy of lowering fishing gear deeper, the time of fishing and the type of bait used.

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