Fish Community Assessment in Serayu Moveable Dam Post-Catastrophic Mortality

Isolated headwater streams in mined watersheds may have good water quality and fish habitat, yet be disconnected from immigration sources by stream segments impaired by acid mine drainage (AMD). Studies of fish and macroinvertebrate communities, habitat, and a number of hydrochemical parameters in Monday Creek, Ohio, show that AMD eliminates fish communities and severely limits macroinvertebrate communities in directly affected tributaries. Isolated headwaters in the heavily mined Monday Creek watershed have relatively good water quality and habitat, but poor fish communities. Comparison of isolated Monday Creek headwaters with non-isolated reaches in unmined watersheds indicates that differences in fish communities are attributable to isolation. Fish communities in isolated headwaters have lower Indices of Biotic Integrity (IBI) than comparable non-isolated communities, reduced species numbers, and lower numbers of individuals, despite suitable habitat as measured by the Qualitative Habitat Evaluation Index (QHEI). Comparison of macroinvertebrate communities shows higher Invertebrate Community Indices (ICI), and no apparent species loss, which can be attributed to the obligate flight stage in the life cycle of many macroinvertebrates, which enables them to overcome aquatic barriers. The implication of this research is that there is an opportunity for recovery of depleted fish communities in large AMD-isolated areas with good water quality, suitable habitat, and intact macroinvertebrate communities, by downstream treatment or source control of AMD to create aquatic corridors for fish immigration.

ABSTRACT: This research was purposed to reveal and discover fish community in Serayu river at Banyumas Residency, Central Java, Indonesia. Research was done in two years which replicated each 3 months, since October 2009 till July 2011. Data analysis including: aquatic physical and chemical parameter and plankton species variation, fish abundance, fish species diversity and domination, age structure, condition factor, fecundity, Gonade Growth Level (GGL), Gonade Growth Index (GGI), and environmental factor and fish community structure relationship. Analysis done in this research were diverse analysis with software: Plymouth Routines in Multivariate Ecological Research (Primer), Cluster, and Multi Dimensional Scalling (MDS). During research fishes caught were as many as 3,871 fishes divided to 29 species, 20 families, and 11 ordos. Aquatic qualities factor including aquatic physical and chemical parameters and plankton species variation in Serayu river at Banyumas Residency were in good condition and suitable for fishes life. Cyprinidae family found as most varied species and most founded species in individual number at Serayu river in Banyumas Residency. There were low species diversity, but there weren’t found any dominance. Fish abundance in Serayu river increasing toward downstream, but discovered otherwise with fish diversity. Fish community in area toward upstream from Serayu Adjustable Dam differs with fish community in area toward downstream from Serayu Adjustable Dam. Serayu Adjustable Dam existence causing on decreasing fish species abundance and diversity in Serayu river at Banyumas Residency; thus, decrease fish community quality both in area before and after the dam. Fish growth pattern and reproduction profile in Banyumas Residency are not ideal. KEY WORDS: Fish community, abundance, diversity, domination, upstream and downstream, Serayu river, Serayu Adjustable Dam, and pattern and reproduction. About the Author: Dr. Susanto is a Senior Lecturer at the FKIP UMP (Faculty of Education and Teacher Training, Muhammadiyah University of Purwokerto), Jalan Raya Dukuhwaluh, Purwokerto City, Central Java, Indonesia. For academic purposes, the author can be contacted via e-mail at: susanto280266@gmail.com How to cite this article? Susanto. (2015). “Fish Community in Serayu River, Banyumas Residency, Central Java, Indonesia” in EDUCARE: International Journal for Educational Studies , Vol.8(1) August, pp…. Bandung, Indonesia: Minda Masagi Press and UMP Purwokerto, ISSN 1979-7877. Chronicle of the article: Accepted (July 15, 2015); Revised (August 3, 2015); and Published (August 25, 2015).

Hamilton Harbour is a large (21 km2) protected harbour located at the western end of Lake Ontario that was designated as an Area of Concern in 1985 by the International Joint Commission. As part of the designation, the fish community was deemed “impaired.” One of the long-term goals of the Hamilton Harbour Remedial Action Plan is to rehabilitate the fishery to a state, at least in part, to what it was prior to the degrading effects of industrial and municipal pollution, habitat loss, and invasive species. Since the Area of Concern designation, the nearshore fish community has been monitored regularly via a federal boat electrofishing program (1988–2013) and more recently, by a trap net program (2006–2012). During the study period, the harbour underwent significant physical and biological change which was related to both lake-wide (e.g. Dreissenids) and localized harbour events (e.g. habitat restoration). The fish community was assessed temporally using two indices of ecosystem health, the Great Lakes Index of Biotic Integrity and Proportion of Piscivore Biomass, and species-specific catch trends at unaltered sites or sites modified by habitat restoration. Early on, the fish community was dominated by tolerant species characteristic of degraded, eutrophic environments and piscivore abundance was low. The fish community responded positively to ecosystem actions during the first decade that improved water quality, increased physical habitat and reduced invasive species, but further progress was confounded by the interactions with other factors in the last decade that included new invasive species and a decline in water quality. Fish community assessments in the last decade, using both the indices found that the fish community was still impaired and dominated by non-native and pollution tolerant species. The Index of Biotic Integrity was a suitable indicator of ecosystem health strengthened by a consistent assessment with the Proportion of Piscivore Biomass index. A science based refinement of the existing Index in the future would benefit the ability to assess nearshore fish assemblages in the context of conservation goals.

Riparian land use remains one of the most significant impacts on stream ecosystems. This study focuses on the relationship between stream ecosystems and riparian land use in headwater regions. Four riparian land types including forest, grassland, farmland, and residential land were examined to reveal the correlation between stream water and fish communities in headwater streams of the Taizi River in north-eastern China. Four land types along riparian of 3 km in length were evaluated at 25, 50, 100, 200 and 500 m widths, respectively. Generally, the results found a significant relationship between riparian land uses and stream water quality. Grassland was positively correlated with water quality parameters (conductivity and total dissolved solids) at scales from 100 to 500 m riparian width. Farmland and residential land was negatively correlated with water quality parameters at scales from 25 to 500 m and from 50 to 200 m riparian widths, respectively. Although the riparian forest is important for maintaining habitat diversity and fish communities, the results found that only fish communities were significantly correlated with the proportion of riparian farmland. Farmland had a positive correlation with individual fish abundance within a riparian corridor of 25 to 50 m, but a negative correlation with fish diversity metrics from 25 to 100 m. This study indicates that effective riparian management can improve water quality and fish communities in headwater streams.

A comparison of passive and active gear in fish community assessments in summer versus winter

A data-mining framework for exploring the multi-relation between fish species and water quality through self-organizing map.

Water quality and fish species are studied in selected catchments of Lake Victoria. The major aim of the study is to establish the relationship between the environmental quality and fish communities in the selected study sites of Lake Victoria. Physico-chemical characteristics of water in selected sites were determined on-site while nutrients and heavy metals were determined in the laboratory using standard methods. Fish samples were collected using experimental multi- filament gillnets with varying mesh sizes. Fish identification was done using external morphological characteristics and identification keys. Physico-chemical results in Thruston bay revealed rise in water column temperature and turbidity as compared to those measured by earlier studies on the lake. Dissolved oxygen (DO) ranged from 0.9 mg L -1 in Yala catchment to 11.56 mg L -1 in Thruston bay. Phosphorus (P) ranged from 9.78 � g L -1 to 120.67 � g L -1 in Thruston bay and in Yala catchment, it ranged from 185.2 � g L -1 to 1526.9 � g L -1 . The nitrate-nitrogen loading in the Geita catchment ranged from 130 to 7465 kg N between the years 2006 and 2008. The results in the inshore sites show a potential for higher photosynthetic rates than in the offshore sites implying that there is more food for the fish in the inshore sites than in the offshore sites. Results further reveal that in Thruston bay there are 13 fish species and Haplochromines dominate the fish catch in terms of numbers. Heavy metals including mercury resulting from artisanal and commercial gold mining in the Geita study site were also detected in the discharges into the lake. This paper also presents measures for the sustain- able management of the lake environment, its quality and fisheries.

SUMMARY 1. Piscivores (annual stocking of 1000 individuals ha−1 of 0+ pike and a single stocking of 30 kg ha−1 of large 20–30 cm perch) were stocked in seven consecutive years in a shallow eutrophic lake in Denmark. The stocking programme aimed at changing food‐web structure by reducing zooplanktivorous and benthivorous fish, with resultant effects on lower trophic levels and ultimately water quality.2. The fish community and water quality parameters (Secchi depth, concentrations of total phosphorus, chlorophyll a and suspended solids) were monitored between 1996 and 2000 and relationships were evaluated between predatory fish and potential prey and between zooplanktivorous or benthivorous fish and water quality parameters. In addition, potential consumption of piscivorous fishes was calculated.3. The density of fish feeding on larger zooplankton or benthos (roach >15 cm, crucian carp >15 cm) declined distinctly during the study period. This effect was attributed to predation by large (>50 cm) pike. Based on scale readings, we cautiously suggest that the stocking of 0+ pike boosted the adult pike population to produce an unexpected impact in later years. Conversely, no direct impact of stocked 0+ pike was detected on 0+ roach.4. A major decline in the recruitment strength of 0+ roach was observed in 2000. A combination of (i) the indirect effect of large pike preying on adult roach, with negative effect on roach reproduction and (ii) the direct predation effect of 0+ pike and/or 1+ and 2+ perch recruited in the lake, provides the most likely explanation of this phenomenon.5. A marked increase in Secchi depth in 2000 and declining trends in suspended solids, chlorophyll‐a and total phosphorus concentrations were observed. These changes may also be attributable to changes in the fish community, although the relationships were not straightforward.6. This 7‐year study indicates that piscivorous fish may be a significant structuring force in shallow eutrophic lakes, suggesting that stocking piscivores can increase predation pressure on cyprinids. However, the general lack of impact of 0+ pike points to the need of refining current stocking practices in several countries across Europe.

The development along the river has tremendously affected the ecological health of the river environment, where the changes and disturbance of the environment could lead to deterioration of water quality and habitat destruction. This study aimed to assess the ecological health of the Pahang River through the integration of the Fish-Base Index (FBI) and Water Quality Index (WQI). The fish community, habitat conditions, and water quality survey were conducted monthly from 2007 until July 2010 at twenty-one (21) sampling sites. There are four (4) related fish characteristics were used to calculate the fish index: (i) species richness and composition, (ii) trophic composition, (iii) habitat and spawning area, (iv) fish health and abundance, and eight (8) water quality parameters were measured and used to compute WQI. Based on the survey result, most of the sampled fish species are native to the Pahang River, with the cyprinid family as the dominant species. The water column species have decreased from upstream to downstream, while the demersal and/or benthic species have shown an increasing pattern toward the downstream area. The IBI result indicates that the value is high in the upstream area, followed by the downstream and middle stream area. The IBI result is consistent with the WQI results that clearly state the WQI is higher at the upstream and lowest at the middle stream area. Human activities were identified as one factor that reduced the biotic composition and water quality in certain areas, especially KM3. In contrast, extensive human activities such as logging, land use changes, wastewater discharge, agriculture, and aquaculture activities were recognized as the main pollution sources in the middle and downstream areas. The F-IBI and WQI results clearly show a positive correlation between increasing human activities and perturbation. The integration of these indices can offer a more accurate and safer evaluation of the ecological health of a river. Therefore, the combination of the fish base index and water quality index is a valuable tool for assessing the ecological health of a river, and its integration can provide a more reliable and comprehensive ecological assessment.

With the captured fisheries sector as a livelihood for residents around Jatigede, it is feared that water quality will decline. Another function of the Jatigede Reservoir is to irrigate irrigation canals, control floods, source PLTA power, and raw water to serve the people of Sumedang, Indramayu, and Cirebon city. The intended purpose is to determine the quality of water in the Jatigede Reservoir. This research was carried out in Jatigede Reservoir from November 2020 to August 2021, using the survey method. The method of determining the location used a purposive sampling method, carried out at five stations representing Jatigede Reservoir. The water quality parameters used are temperature, pH, dissolved oxygen, and brightness. The results of observations of water quality in Jatigede Reservoir with temperatures ranging from 28°C-29°C, pH ranging from 6.67–8.35, dissolved oxygen ranging from 6.8–7.83 mg/l and brightness ranging from 70-93.8 cm indicate that the water quality of the Jatigede Reservoir is still categorized into good water quality and is ideal for capture fisheries sector activities in the Jatigede Reservoir. The results of the status of water quality in the waters of the Jatigede Reservoir are included in the category of Fulfill Quality Standards to Lightly Polluted, and the average Pollution Index value ranges from 1.75 to 3.01 in class II water quality standards and 0.86-1.94 in class III water quality standards. Water quality in Jatigede Reservoir during the research was influenced by the input of river flow in the form of organic and inorganic waste. Water pollution control strategies can be carried out by increasing the inventory and identification of pollutant sources, improving waste management, determining the capacity of the pollution load, increasing knowledge and community participation in waste management, increasing supervision of wastewater development, and improving water quality monitoring.

Effects of conservation wetlands on stream habitat, water quality and fish communities in agricultural watersheds of the lower Mississippi River Basin

Yi’an Reservoir is located on a major tributary of the Baoquan River and hosts abundant aquatic resources, with Cyprinus carpio, Carassius auratus, and Hemiculter leucisculus as the dominant fish species. Water quality parameters significantly shape fish gut microbiota, which in turn plays a crucial role in host physiological functions. This study aimed to characterize the water quality parameters in Yi’an Reservoir and identify the microbial communities in both the aquatic environment and fish guts (C. carpio, C. auratus, and H. leucisculus) through 16S ribosomal RNA sequencing. The objective was to examine the associations of water quality parameters and aquatic environmental microbiota with the assembly of gut microbial communities in fish inhabiting this reservoir system. The water quality parameters showed significant site-specific differences, of which temperature and dissolved oxygen were highest at Location B, while pH was highest at Location A. The Cyanobium_PCC-6307 was identified as a major differentially abundant taxon at the genera level across different sampling sites. Furthermore, the gut microbiota of the same fish species exhibited substantial variation across different sampling sites. Redundancy analysis identified distinct environmental drivers at each location. Specifically, pH, conductivity, and total dissolved solids (TDS) showed positive correlations with the gut microbiota at Location A. In contrast, temperature, dissolved oxygen (DO), and the environmental abundance of Cyanobium PCC-6307 were positively correlated with the gut microbiota at Locations B and C. This study provides important insights for the conservation and management of aquatic resources in reservoir ecosystems.

Fish communities and environmental variables during dry season in Pampanga estuary (Philippines)

In this contemporary era, wetlands and the entire aquatic diversity are suffering from major pollution problem. Not only the aggregation of higher population in metropolitan causes the production of plenty of solid, liquid and gaseous wastes, but also the high-technological industries contribute to a mammoth of wastes in the ecosystem. During the process of industrial effluent discharge into the water bodies, the toxic substances available in these wastes can affect the aquatic flora and fauna, resultantly disturbing the entire system and constituting human health hazards indirectly or directly. The objective of this study was to estimate the nutritional value of the liver and intestine of fish which is being discarded as waste during fish processing and pollution status by calculated water quality index (WQI) and comparison of both wetlands during diverse seasons. WQI of Harike Wetland was observed to be 56.68 which indicates that water quality in this wetland is “poor”, while at Nangal Wetland WQI was calculated to be 39.54 and comes under “good” water quality and safe for the entire ecosystem. HPI (heavy metal pollution index) for Harike Wetland was observed 144.9 and for Nangal Wetland was 3.12, indicating heavy load of heavy metal pollution at test sample site. MI (metal index) value was also detected higher at test sample site (4.76) as compared to that at control site (0.22). The mean total n-3 and n-6 polyunsaturated fatty acids (PUFAs) declined in the liver of test fish samples (Harike Wetland) as compared to control fish (Nangal Wetland) samples except in winter season. Similarly, mean total saturated fatty acids (SFAs) were also found to decline significantly (p<0.05) in the liver of test fish sample as compared to control fish sample during autumn and winter seasons. Significant (p<0.05) decline of mean total n-3 PUFAs (except winter) and total n-6 PUFAs (except rainy) in the intestine of test fish sample was observed during all the seasons when compared to control fish samples. However, total SFAs were found to increase in the intestine of test fish samples as compared to control fish samples during all the studied seasons. In the present investigation, fluctuations recorded in the water quality parameters and major groups of FAs in the tissues were due to the geographical location and pollution load in the fish samples taken from Harike Wetland.

A study of the Vila-Vicosa small hydroelectric development, situated on the Ardena river (hydrographical basin of the river Douro, Portugal) was carried out for one year, with the purpose of evaluating the existence of differences in the fish communities found downstream and upstream of the development. A characterization of the system was made, bearing in mind morphological, hydrological and physical and chemical characteristics and studying the structure and dynamics of the fish communities. With the collected data on physical and chemical parameters a study of its space-time variation was made. Moreover, with the data relative to the fish communities a study of the space-time variation of some parameters was carried out. After the analysis of the data, it is possible to conclude that the Ardena river is a lotic system with water of good quality and that the functioning of the hydroelectric plant does not produce variations of the values of the parameters measured. The results obtained for the space-time variation of the fish community reveal some alterations in its distribution.