Water quality and fish diversity in the Brantas River, East Java, Indonesia

The purpose of this study is to describe the presence of species diversity and composition in Bratas River. Fish sampling was conducted in dry and rainy seasons in five locations, namely Batu City, Blitar City, Tulungagung regency, Jombang Regency, and Mojokerto Regency, East Java. This study collected 295 individual fishes belonging to 12 species. The 162 individuals were obtained in the dry season, while 133 individuals were captured in rainy season. The most dominant species was mujahir (Oreochromis mosambica) followed by keting (Mystus paniceps) and kutuk (Channa striata). The fish abundance significantly varied among study sites, while that of species richness and diversity did not differ significantly. Fish diversity in high elevation was the lowest, while that in relatively middle elevation was the highest. Compared to the previous report, fish species diversity in Brantas was decreasing, some species were not found. Three species were considered as exotic include Oreochromis mosambica, Clarias batracus, Oreochromis niloticus.

show abstract

“…Fig. 5 the similarity of fish composition among study sites and between Source: several studies [20], [22], [26]…”

Section: A Resultsmentioning

confidence: 99%

Diversity of Fish Species in Several Sites Along the Brantas River East Java Indonesia

Ahmad

Hakim

Retnaningdyah

et al. 2021

International Journal of Biology and Biomedical Engineering

View full text Add to dashboard Cite

show abstract

“…If commercial harvesting of glass eels were to be intensified in the future, this could bring them potentially close to an extinction vortex, i.e., a situation in which reduced population size and increased demographic variance either induce spatial fragmentation or a reduction in population adaptive potential [93,94]. Furthermore, the rapid development of infrastructure during the last two decades in this part of Indonesia has already resulted in fragmentation and reduced habitat availability, as well as water pollution associated with industrial waste and agricultural run-off [95][96][97][98].…”

Section: Discussionmentioning

confidence: 99%

Assessing Temporal Patterns and Species Composition of Glass Eel (Anguilla spp.) Cohorts in Sumatra and Java Using DNA Barcodes

et al. 2021

View full text Add to dashboard Cite

Anguillid eels are widely acknowledged for their ecological and socio-economic value in many countries. Yet, knowledge regarding their biodiversity, distribution and abundance remains superficial—particularly in tropical countries such as Indonesia, where demand for anguillid eels is steadily increasing along with the threat imposed by river infrastructure developments. We investigated the diversity of anguillid eels on the western Indonesian islands of Sumatra and Java using automated molecular classification and genetic species delimitation methods to explore temporal patterns of glass eel cohorts entering inland waters. A total of 278 glass eels were collected from monthly samplings along the west coast of Sumatra and the south coast of Java between March 2017 and February 2018. An automated, DNA-based glass eel identification was performed using a DNA barcode reference library consisting of 64 newly generated DNA barcodes and 117 DNA barcodes retrieved from BOLD for all nine Anguilla species known to occur in Indonesia. Species delimitation methods converged in delineating eight Molecular Operational Taxonomic Units (MOTUs), with A. nebolusa and A. bengalensis being undistinguishable by DNA barcodes. A total of four MOTUs were detected within the glass eel samples, corresponding to Anguilla bicolor, A. interioris, A. marmorata, and A. nebulosa/A. bengalensis. Monthly captures indicated that glass eel recruitment peaks in June, during the onset of the dry season, and that A. bicolor is the most prevalent species. Comparing indices of mitochondrial genetic diversity between yellow/silver eels, originating from several sites across the species range distribution, and glass eels, collected in West Sumatra and Java, indicated a marked difference. Glass eels displayed a much lower diversity than yellow/silver eels. Implications for the management of glass eel fisheries and species conservation are discussed.

show abstract

“…Indonesia waters are very vulnerable to climate or weather change. The weather anomalies that happened in 2016/2017 was caused by natural phenomena, namely the El Nino and La Nina and also the changes in SST (Hayati, 2017) Chlorophyll-a is a pigment from phytoplankton that plays a role in the photosynthesis process. Chlorophyll-a is also used as an indicator of water fertility, which is indicated by the SSC concentration in these waters.…”

Section: Potential Lemuru Fishing Groundmentioning

confidence: 99%

Oceanographic variability and its influence on pelagic fish catch in the Bali Strait

Sambah

Oktavia

Kusuma³

et al. 2020

Berkala Penelitian Hayati

View full text Add to dashboard Cite

The existence of pelagic fish resources is greatly influenced by the condition of the waters which are described through its relationship with the oceanographic parameters. As a dominant species in Bali Strait, lemuru fish (Sardinella lemuru) have catch dynamics that vary each year. Oceanographic factor influence the number of fish catch in Bali Strait, in which global phenomena such as ENSO and IOD also have a role in influencing the migration of marine resources. This research aims to analysis annual variation of Sea Surface Temperature (SST) and Sea Surface Chlorophyll-a (SSC) in Bali Strait, and its effect on fish catch. The method applied a quantitative descriptive with correlation analysis and spatial analysis using Geographical Information System approach. The analysis described a significant impact of oceanographic parameters on pelagic fish catch. SSC has a significant impact on the number of fish catch which describes a positive correlation, and it illustrated a time interval between the highest concentration of SSC and the period of fishing peak season. It also impacts the fishing trip and the distribution of fishing ground that spread along the area of the Indian Ocean to Bali Strait. SSC has a significant impact on the number of fish catch which describes a positive correlation, and it illustrated a time interval between the highest concentration of SSC and the period of fishing peak season. It also impacts the fishing trip and the distribution of fishing ground that spread along the area of the Indian Ocean to Bali Strait

show abstract

Water quality and fish diversity in the Brantas River, East Java, Indonesia

Cited by 21 publications

References 0 publications

Diversity of Fish Species in Several Sites Along the Brantas River East Java Indonesia

Diversity of Fish Species in Several Sites Along the Brantas River East Java Indonesia

Assessing Temporal Patterns and Species Composition of Glass Eel (Anguilla spp.) Cohorts in Sumatra and Java Using DNA Barcodes

Oceanographic variability and its influence on pelagic fish catch in the Bali Strait

Contact Info

Product

Resources

About