Asian Journal of Fisheries and Aquatic Research

The present study was conducted to figure out the heavy metals (Cd, Co, Cu, Fe, Hg, Mn, Mo, Ni, Pb and Zn) concentrations in water, sediments and fish species from the Rupsha River, Khulna, Bangladesh to spot the heavy metal contamination level. Heavy metals are dangerous because they're non-biodegradable and having an extended half-life period. The heavy metal contamination could also be an excellent concern, especially for aquatic life. The metal concentration within the water sample from the Rupsha River was significantly above the rule values of WHO and USEPA respectively. Moreover, the concentration of metal within the sediments was also greater than the respective probable effect concentrations of the sediment quality guidelines. Furthermore, consistent with the fish standards, these studied fish species weren't found to be contaminated by heavy metals. It’s concluded that each of the heavy metals from the whole sample didn't exceed the standard maximum level. This study demonstrated that water of Rupsha River isn't safe for aquatic organisms also like humans in terms of Pb, Cd and Cr contents as accumulated through consumption.

This research aims to analyze the policy about Citarum Harum and analyze social economy condition fisheries resource from freshwater on floating cage Saguling Reservoir, West Bandung District. This research was conducted in Saguling Reservoir, West Bandung District, starting in August until November 2019. The method of data collection was carried out by survey methods, the technique of taking respondents using a purposive sampling technique. This research data consists of two types of data, namely primary data and secondary data. Analysis of the data used in this research includes the Likert Scale and business analysis. The result of the analysis policy influence use Likert Scale has an average index value at 8562%. This average index means the influence of policy citarum harum is considered very well by related stakeholders. Analysis of social-economic conditions The aquaculturist has good economic potential. Seen from the result of income and business analysis on each cultivator showing value Rp.17.125.000/3month and RCR value as big as 1,922.

Cikeruh River is one of the tributaries of the Citarum River which has received a variety of inputs, which can affect the river water quality and cause pollution. Macrozoobenthos is an organism that can determine the pollution of waters. This research aims to determine the spatial distribution of macrozoobenthos communities in the Cikeruh River as the indicator of pollution. This research was conducted in July 2019 - August 2019 using the field survey method. The data collection technique used is purposive sampling, setting 5 stations based on environmental factors and land use around the river flow. The parameters observed were the physical-chemical parameters of the waters, physical-chemical parameters of the substrate and macrozoobenthos as biological parameters as indicators of pollution, as well as calculating the abundance of macrozoobenthos, diversity index, uniformity index, species deficit and morisita index. The results of the macrozoobenthos spatial distribution along the Cikeruh River flow differed at each location of observation. At station 1 found several intolerant species Heptagenia sp., Tipula sp., Leptophelbia sp., Polycentrophus sp. and Enallagma sp., station 2 found several facultative species Melanoides tuberculata, Lymnaea sp., Tarebia granifera, Sulcospira testudinaria, and Corbicula fluminea,, station 3 found several facultative species Melanoides tuberculata, Lymnaea sp., Tarebia granifera, Sulcospira testudinaria, Pomacea canalicuta and Corbicula fluminea, station 4 found several facultative species Melanoides tuberculata, Tarebia granifera, Sulcospira testudinaria and Corbicula fluminea, and station 5 found intolerant species Chironomus sp., Tubifex sp., and Lumbriculus sp. The abundance of macrozoobenthos is around 590 ind/m² - 7420 ind/m². Diversity index ranges from 0.46-1.85. The uniformity index ranges from 0.16 to 0.64. Species deficits at each station are different. Cikeruh River morisita index ranging from 0.14 to 0.80 which is in the uniform category.

This research was conducted in May 2018 until September 2018, aimed at analyzing the eating habits of nilem fish which are kept in the waters of CV Agri Insan Mandiri, Tegalsari Village, Kadungora District, Garut Regency, West Java. The research method used was purposive sampling for sampling water quality and plankton abundance, as well as simple random sampling method for sampling nilem fish as a data source for eating habits. Data on mineral content in dissolved soil and minerals in the waters is used as supporting data that determines the presence of natural feed. Based on the results of this research, it was found that in the Minapaddy waters found 7 phyla including Bacillariophyta, Euglenophyta, Chlorophyta, Cyanophyta, Ochrophyta, Cryptophyta and Rodophyta. Bacillariophyta and Euglenophyta are the most common phyla. Natural feeds favored by nilem fish come from Bacillariophyta with a total of 10 genera, while those that are not favored come from Euglenophyta with 2 genus. The composition of dissolved minerals Calcium (Ca), Potassium (K), Iron (Fe) and Silica (Si) exceeds the normal requirements for phytoplankton, especially Bacillariophyta, so that the abundance of plankton is comparable to Euglenophyta which is not utilized by nilem.

Tomini Gulf coast inhabited by various ethnic groups in Indonesia, one of Gorontalo. The coastal area Gorontalo Tomini Bay stretches from the border Bone Bolango - Mongondow Bolaang South (North Sulawesi) to Pouhuwato - Parigi Moutong (Central Sulawesi). The purpose of this research for the inventory of local knowledge Gorontalo related to astronomy and movement of pelagic fish in the Gulf of Tomini. Based on this research, there is local wisdom that still retained fishermen off the coast of Gorontalo, Tomini, like the seasons, currents and astronomy (astrology). Fishermen off the coast of Gorontalo, Tomini, referring to the constellation as a direction and a benchmark in the utilization of fishery resources.

Collecting data in this study done by observation and interviews with several respondents fishermen. Respondents were determined by purposive sampling (intentionally). Data collection for this study from September 2017 until February 2019. Similarly Discussion Forum Focus (Focus Group Discussion, FGD) in several places on local wisdom for the season, currents and  astronomy.