TORANI: Journal of Fisheries and Marine Science
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Study of Maximum Sustainable Yield of Rabbitfish (Siganus sp.) in Makassar Waters
Full text linkThis study aims to estimate the potential of fish resources which include catch per unit effort (CPUE), Maximum Sustainable Yield (MSY), optimum efforts, exploitation rates and total allowable catch (TAC) of Rabbitfish in Makassar waters. This study uses time-series data, namely annual data from the fisheries statistics report at the Office of Marine and Fisheries Service, South Sulawesi Province from 2007 until. 2016. The method used to predict fish resource potential in the study is the Surplus Production method referring to the Schaefer model. The results of the study showed that the average production and standard efforts in the 10-year period were 78.8 tons per year and 1304 standard units per year respectively. The estimation results obtained by MSY and the optimum efforts of rabbitfish per year were 104 tons and 1142 standard units, respectively and total allowable catches (TAC) are 82.979 tons per year. The level of utilization of rabbitfish resources in Makassar waters in the last three years has been overexploitation
Potencial utilization of skipjack tuna (Katsuwonus pelamis) in Bone Bay
Full text linkThe skipjack tuna (Katsuwonus pelamis) resource in Bone bay has long been exploited, but information about the sustainable potential of this fish resource in Bone bay waters is still very limited. The aim of this research is to estimate potential of fish resources that include catch per unit effort (CPUE ), the maximum sustainable yield (MSY), optimum effort, exploitation rate and total allowable catch (TAC) of skipjack tuna in the waters of Bone bay. This study uses time series data, namely annual data from the fisheries statistics report at Marine and Fisheries Service, South Sulawesi Province from 2006-2015. The method used to estimate the potential of fish resources in this study is the surplus production method with the Schaefer model. The results showed that the average production and standard efforts in the 10-year period were 14689.7 tons and 914 standard units respectively. The estimation results obtained MSY and optimum effort per year are 22561.4 tons and 1730 standard units, and allowed catches (TAC) of 18049.2 tons per year. The level of exploitation of skipjack tuna resources in the waters of Bone Bay does not over exploited every year except in 2017.Keywords: potential of fish resources, skipjack tuna (Katsuwonus pelamis), MSY, TAC, Bone bay
Phytochemical analysis and antibacterial activity of Staurogyne sp. in fish disease bacteria
Full text linkThis study was aimed to identify the potential use of active compounds extracted from Staurogyne sp as an antibacterial agent to control disease-causing bacteria in fish. Staurogyne sp, an aquatic plant collected from Bantimurung, South Sulawesi were subjected to allelochemical compound. Plant extracts were tested to five bacteria including four types of bacterial pathogen, such as Aeromonas hydrophilla, Edwardsiella ictaluri, Streptococcus agalactiae, and Flavobacterium columnare, and one bacterial sensing quoroum, Chromobacterium violaceum. Based on phytochemical analysis, Staurogyne’s extracts derived from both stem and root contained flavonoids, phenols, and antioxidants compounds with the concentration of 0.018 mgQE/g, 0.3471 mgGAE/g, and 1004,391 IC50 µg/mL, respectively. In addition, Staurogyne plant extracts derived from both their stem and root has also produced both saponins and glycosides compounds. Plant extracts derived from Staurogyne’s leaves revealed three major chemical compounds such as flavonoids (0.77 mgQE/g), phenol (0.0629 mgGAE/g), and glycosides (+). However, no antioxidants and saponin compounds were detected. Applying plant extracts as an antibacterial on five disease-causing bacteria causing diseases in aquaculture, such as Aeromonas Hydrophilla, Edwardsiella ictaluri, Streptococcus agalactiae, Flavobacterium columnare, and Chromobacterium violaceum bacterials revealed that at concentration of 0.1 g the Staurogyne sp extracts did not influence all the bacterials growth. However, by application of plant extract at concentration of 0.2 g on the growth media,three out of 5 tested bacterials (Aeromonas hydrophilla, Edwardsiella ictaluri, and Streptococcus agalactiae) showed intermediate inhibition responses on bacterial growth. The growth of remaining two bacterials pathogen, Flavobacterium columnare and Chromobacterium violaceum at 0.2 g plant extract of Staurogyne sp was not affected. This study revealed that the use of active compound derived from Staurogyne sp would be potential to be used in inhibiting disease-causing bacterial in fish in future. However, optimum concentration of the plant extracts, in particular on the inhibition of the growth of disease-causing bacteria in fish is still needed to adjust.Key words: Antibacterial, aquatic plant, Staurogyne sp, fish diseas
Correlation of environmental factors and spatial distribution of moluscs communities in mangrove reboisation areas of Seribu Islands, Indonesia
Full text linkMangrove reforestation is often carried out in various regions or regions, but information about the relationship of environmental factors and the distribution of fauna associations is still very minimal. The Principal Component Analysis (PCA) study on the correlation of environmental factors and the spatial distribution of the molusks community in the Seribu Islands mangrove reforestation area was conducted in March 2014 with the aim of analyzing environmental factors for the diversity and presence of the molusks. Environmental factors are measured insecurely, while the moluccan community is collected by making line transects and plots measuring 10 x 10 m2 and in the size of 10 x 10 m2, a small plot of 1 x 1 m2 is made. The results of the study show that environmental factors are not so different between stations and do not exceed the quality standard for the lives of 4 species of mollusks, where the parameters of aquatic pH are the environmental factors that most influence their distribution.Keywords: environmental factors, distribution, mollusks community, mangrove reforestation, Seribu Island
Impact of sedimentation to sponge on coral reef ecosystems in Hoga and Sampela Island, Wakatobi Archipelago
Full text linkSponge is marine organism from porifera phylum which is a filter feeder (filtering food). Sponge can be degraded by high sediment suspended seawater, which causing a sponge body blockage, which will inhibit the growth of the sponge and even experienced death. This study aims to analyze the sponge coverage, sponge species identification and the relationship between sponge coverage and sedimentation rate. Underwater Photo Transect (UPT) was used in this study at three (3) depths i.e. 3 m, 6 m, and 10 m. The results showed that sponge coverage in high sedimentation rate is lower and there are 17 sponge species were found which were divided in to 14 family. In addition to sedimentation, water quality also greatly affects sponge coverage, such as currents, dissolved organic matter, salinity, and turbidity. One cause of sedimentation comes from the land, such as the transfer of land functions. Sponge\u27s existence will continue to be threatened by physical and chemical pressure, and sedimentation if exploitation cannot be controlled.Keywords: sponge, sedimentation, water quality, land change
Study of aquatic plants and ecological- physics Tempe Lake, Sulawesi Selatan
Full text linkAquatic plants are an indicator of the fertility of an aquatic region. The waters of Lake Tempe are the largest waters of the lake area in South Sulawesi. Lake Tempe is located in the western part of Wajo District, precisely in Tempe District, about 7 km from Sengkang City towards the banks of the Walanae River in southern Sulawesi. The area is about 13,000 ha with a maximum depth of 5.5 m and can reach more than 30,000 ha during floods, and during the dry season, the inundation area reaches only 1,000 ha with a maximum depth of 1 m, located above the continental and Australian and Asian plates. This lake is one of the tectonic lakes in Indonesia. Every year silting the lake occurs. The Tempe hydro vegetation and eco-physical research were carried out in October 2017. The purpose of this study was to record aquatic plant species that live in Tempe Lake and observe ecological changes and physical properties of Lake Tempe. Aquatic plants are expected to be able to filter lake water. The results obtained are physical conditions of sharp-smelling water, unpleasant taste, dark brown, and cloudy color. Chemical indicators of NH3-N waters (0.2976-0.0634), PO4-P (0.0172-0.0844) NO2-N (undetectable), NO3-N (1.7131-1.9335), Sulphate (27.761900 - 37.047620), DO (6.88-7.18) and pH (7.88-8.02). There are 14 species of aquatic plants found in these waters. The most dominant species is water hyacinth. In the case of Tempe lake water vegetation results in siltation of the lake area.Keywords: Aquatic plant, Biodiversity, Species, Tempe lake
The Ability of biofilter sponge demospongiae class with various forms of growth towards the turbidity and total suspended solid
Full text linkThe sponge is an invertebrate animal from phylum porifera that lives permanently and filters out what is in the water column. The sponge has various forms of growth, including massive, branching, and submissive. Each form of growth is indicated to have different filtering abilities, so this research needs to be done. This study aims to determine whether the ability to filter (biofilter) Turbidity and Total Suspended Solid sponge depends on the form of growth (Massive, Submassive, and Branching). This research was conducted from September to October 2016. Taking sponges in the waters of Barranglompo Island, testing was carried out at the Hatchery Marine Station at Hasanuddin University, Barranglompo Island and measurements of water quality parameters were carried out at the Chemical Oceanography Laboratory, Department of Marine Sciences, Faculty of Marine and Fisheries, Hasanuddin University. The acclimatization process needs to be done to adapt the sponge before being given treatment. Each aquarium is filled with seawater that has been mixed with sediments as much as 0.17 mg/l. Then each form of sponge growth is put into an aquarium with the same body volume of 500 cm3 and sees the ability to filter it for 10 hours and 24 hours. After that, water samples were taken at each aquarium to measure turbidity parameters, Total Suspended Solid, and Total Organic Materials. The results showed that at 10 hours and 24 hours the sponge with submassive growth forms filtered more particles in the water column than massive and branching growth forms, while sponge with branching growth forms run into stress and death after filtering for 24 hours.Keywords: growth pattern, biofilter, sediment, sponge
Length weight relationship and size distribution long shells bakalang (Marcia hiantina Lamarck) in the coastal waters of Labakkang, Pangkep Regency
Full text linkSeagrass ecosystems in the coastal Labakkang Pangkep regency is the habitat of various types of shellfish which is the target of local fishermen catch. One of the many species of shellfish found in this coastal area is the mussel shell (Marcia hiantina L.). This study aims to determine the relationship between the length and weight of the long shell size of mussel shells (Marcia hiantina L.) in the coastal waters catchment of Labakkang. This research was conducted in catching area at three locations in coastal waters of Labakkang based on density of seagrass and population with sampling every month from August 2014 until July 2015 by using descriptive method that is random sampling by measuring the length of shell and weight of each shellfish. The results showed that the constant value (b) of mussel shell (Marcia hiantina L.) in all observation stations ranged from 2,44 to 2,63, meaning growth pattern including negative allometrik means shell length growth faster than body weight with coefficient of determination (R2) ranging from 0,88 to 0,91 means to have a high enough. The distribution of the size of the mussel (Marcia hiantina L.) is found on the smallest C size station with the range 1,50 – 1,88 cm and the middle value of 1,69 cm and the largest with a range of 5,34 - 5,72 cm and the middle value of 5.53 cm.Keywords: Bakalang shell, Length weight, Coastal waters of Labakkang, Allometric negativ
Production analysis and fish betutu marketing (Oxyeleotris marmorata) in Polombangkeng Utara Sub-District,Takalar District
Full text linkPolombangkeng Utara sub-district is one of the sub-districts that has a large potential of capture / land fisheries, with potential capture fisheries data in 2016 amounting to 3,827 tons. This has led to the emergence of microbial fishing businesses that can increase income and welfare of fishermen. Marketing and investment are the biggest obstacles in this fishing effort. The purpose of this study was to determine how much production and opinions of fishermen and marketing of betutu fish. This research was conducted in September 2018 to October 2018. The method used was descriptive qualitative and quantitative by using a questionnaire. The sampling method used was the random sampling method with a total sample of 22 people, of which 14 were fishermen, 6 fishermen were fishing, 1 was a collecting trader and 1 was an exporter. The data analysis used is profit analysis and marketing analysis. The results of the research obtained are the average profit per trip obtained by fishermen bubu Rp. 264,506, - higher than the average profit per trip fishermen fishing for Rp. 41,711, -, while the average profit per trip obtained by collecting traders is Rp. 257,404, - and exporters of Rp. 638,669, -. And the highest marketing margin is found in the marketing channel 2 at the marketing marketing agency, which is Rp. 130,000, and the lowest marketing margin is in the marketing channel 2 at the distributor marketing agency of Rp. 10,000, -. The highest marketing costs incurred by marketing institutions are found in the marketing channel 2 at the marketing marketing agency, which is Rp. 70,000, and the lowest marketing costs are in the marketing channel 2 at the distributor marketing agency of Rp. 6,000, - and the most efficient marketing efficiency is found on channel 2, which is 0.027%.Keywords: Betutu Fish, Bubu Fishermen and Pool and Line, Production, and Marketin
Analysis of land suitability and carrying capacity of rabbitfish (Siganus canaliculatus) culture in seagrass ecosystem in coastal areas of Barru District, South Sulawesi
Full text linkRabbitfish (Siganus canaliculatus) are found in seagrass beds so that they have the potential to be cultivated in the ecosystem. Cultivation activities require appropriate environmental / land requirements and support to be able to live and develop optimally. This study aims to analyze: (1) Suitability of rabbitfish cultivation land in seagrass ecosystem, (2) The carrying capacity of the land for rabbitfish cultivation in the seagrass ecosystem. This research was carried out in the coastal area of Barru Regency in March-April 2017. This study uses a method with the Remote Sensing Technology and Geographic Information Systems (GIS) approach. The types of data collected are oceanographic oceanic parameters consisting of physical factors (temperature, depth, current velocity, and turbidity), and chemical factors (salinity, pH and DO). The results of the study showed that the waters area was suitable ± 135.76 ha. Results estimation of the carrying capacity/capacity of the waters for rabbitfish cultivation with an area of about 81.46 ha or around 407,300 cultivation units or 5000 units / ha (assuming 1 unit of cultivation = 2 m2 (0,0002 ha).Keywords: land suitability, rabbitfish, carrying capacit