Toman fish (Channa micropeltes Curvier, 1831) is one type of fish that is commonly found in the Koto Panjang hydropower reservoir. This fish belongs to the Channidae family, and is the largest fish of the genus Channa. Changes in water conditions in the Koto Panjang Hydroelectric Reservoir can affect the condition of organisms in the waters. The availability of food in the waters will affect th…
Mixing of tofu liquid waste with palm oil mill liquid waste and added with EM4 (fertilizer) has been carried out and is proven to increase the content of organic matter. This research was conducted in March - April 2019. To find out the best fertilizer concentration for growing Chlorella sp., 7 fertilizer treatments were made namely: P0 + (0% + 400 mL Dahril Solution 1), P0- (0%), P1 (40% ), P2…
Pariaman Regency coastal area is affected by current and tide from Indian Ocean that contribute the presence of microplastic in that area. To understand the microplastic types and density, a research has been conducted in May-July 2019. There were 3 sampling sites (Pantai Mangguang, Pantai Ampalu and Pantai Gandoriah) and there were 3 plots (50x50 cm) placed in each site. Sediment inside the pl…
Carrying capacity is defined as the ability of aquatic environment to support the life of organisms in that area. A research aims to determine the carrying capacity and the number of floating net cages which can be operated in Tepian Batu Lake based on total phosphorus concentrations. The research was conducted from June to July 2019. Sampling was determined at 3 locations, namely Station 1 (in…
carrying capacity is defined as the ability of aquatic environment to support the life of organisms in that area. The study aimed to determine the aquatic carrying capacity for aquaculture fishing of Sungai Paku Reservoir, Kampar Kiri District Kampar Regency Riau Province. The carrying capacity is determined based on Total-P concentration. The research was conducted during June to July 2019. Wa…
There were many activities in kolong of tin post mining in Baran Timur Village, Karimun Regency, Kepulauan Riau Province, contributed organic and inorganic materials that influenced concentration of nutrient (N and P) in the water and affect phytoplankton abundance and finally trophic state of waters. This research aims to know the trophic state waters of kolong tin post mining in Baran Timur V…
Tanjung Balam lake is an oxbow lake located around the Kampar River and receive water from that river. A research aims to understand the primary productivity based on oxygen method and the thropic state based on carbon concentration (gC/m3/day) was conducted in June-July 2019. There were three sampling stations, Station 1 (inlet), Station 2 (in the middle lake) and Station 3 (outlet). In each …
Pristolepis grootii Bleeker is one of freshwater fishes that inhabit the Pekak Lake. A study aims to find out the reproductive biology aspectsof P.grootiihas been done in November 2017 to January 2018. Samples were caught using fishing lines and samplings were done 4 times, once/ 2 weeks. Parameters measuredweresex ratio, gonad maturity level, and gonad somatic index (GSI). Total fish sampled w…
The activities of petroleum drilling, ferry ports and leakages of underwater pipeline caused oil pollution in the coastal area of the Mengkapan Village. The presence of oil pollution may trigger gene mutation in specific bacteria and it may produce biosurfactants for degrading the oil. A study aims to investigate the biosurfactant producing bacteria in the coastal of Mengkapan village was condu…
Koto Panjang Reservoir is one of the reservoirs in Riau Province which has a primary function as a hidropower source and has been used for floating cage fish culture activities. Increasing fisheries activities in the dam site will increase organic matter that enter the water and as a consequence it affects water quality in general. A study aims to understand the organic matter load in the dam s…
Macrobrachium mammilodactylus is a type of freshwater shrimp that inhabits the Terminal AKAP Lake. The population of freshwater shrimp in this lake is relatively high and its indicate that reproduction of the shrimp was succeed. To understand the reproduction biology of the shrimp, a study has been carried out from February to March 2018. Sampling were conducted 4 times, once/week. Totally 107 …
Many activities in Tanjung Putus Lake contributes the input of organic and an-organic matter that affects the water quality, especially nutrient concentration in waters. A research aims to understand the trophic state of the Tanjung Putus Lake based on TSI has been conducted on March, 2018. There were 3 station namely station 1 (inlet area), station 2 (in the middle of lake) and station 3 (outl…
The noodle industry liquid waste is rich in ammonia and TSS and thus need to be processed before being flown to environment. A research aims to reduce the ammonia and TSS on liquid waste using biofilters has been conducted in March-April 2018.The noodle industry liquid waste (175 liters) was treated using a batch system that was consisted of 1 anaerob and 2 aerob tanks and an Eichhrornia crassi…
The increment of the number of floating cages in the Koto Panjang Dam may result on increment of organic materials in the water and thus affect the presence of phytoplankton. A study aims to understand the phytoplankton composition around the cages area was conducted on April-May 2018. Samplings were conducted 3 times, once/week. There were 3 stations namely Station 1 area with 100-150 floating…
Many activities in Tanjung Putus Lake contributes the input of organic and an-organic matter that influence the water quality, especially nutrient concentration in the waters. A research aims to understand the trophic state of the Tanjung Putus Lake’s water based on Vollenweider’s Trophic Index (TRIX), was conducted on March-April 2018. There were 3 stations namely Station 1 (inlet area), S…
On the coast of Mengkapan Village there is a mangrove forest covering an area of ± 30 Ha. The condition of mangrove forest has been changed due to domestic waste and oil spills. Secondary impact of mangrove ecosystem changes affect the associated organisms such as gastropods. To understand the community structure of gastropods in that mangrove ecosystem, a research was conducted on February-Ma…
Telescopium telescopium has significant ecological and economical role in the mangrove ecosystem. However, information on the distribution and density of this snail is rare. To understand the distribution pattern of this snail in the mangrove ecosystem of Mengkapan Village, a study has been conducted on February 2018. There were 3 transect lines, in the human inhabitant area (S1), in the ecotou…
Periphyton is a sessile microscopic organism that attach on certain substrate. Research aims to determine the type and abundance of periphyton on plastic substrate has been carried out in April-May 2018 in the Sail River. There were three sampling stations, namely S1 (in the upstream), S2 (in the middle) and S3 (in the downstream). Samplings were conducted once/week for a 3 weeks period. The pe…
Mangroves serve as habitat for mangrove snail, includingEllobiumaurisjudae. A research aims to understand the relationship between the density of the mangrove andthe abundance of snail (E.aurisjudae) was conducted in February 2018. There were 3 stations namely S1 (settlement area), S2(ecotourism area) and S3 (natural mangrove forest). Sampling was done three times, once a week.In each station, …
Periphyton algae commonly attach in submerged object such as wood, rock, coral, carbonic or silica sand, and other algae. The role of periphyton in mangrove ecosystem is as bioindicator of water quality predictors.A study aims to determine the composition of periphyton algae in the root of mangrove trees in the Mengkapan Village wasdone in February - April 2018. Periphyton samples were scrapped…