Carrying capacity is an ability of aquatic environment to support the life of aquatic organisms and itcan be determined based on dissolved oxygen concentration. To understand the dissolved oxygen based carrying capacity in the Sungai Paku reservoir, a research has been conducted in June-July 2019. Water samples were taken in three stations, Station 1 (riverine zone), Station 2 (transition zone)…
Trophic State Index can be used to determine the trophic state of waters. The TSI is using physical, chemical and biological approach to determine the trophic state and the result will be more representative for analyzing the trophic state of waters. A research aims to understand the trophic state of the Sungai Paku Reservoir, has been conducted in May - June 2019. There were three sampling sta…
Carrying capacity is defined as the ability of aquatic environment to support the life organism in that area. This study aimed to assess the aquatic carrying capacity of the Perupuk Lake for extensive fishing. The carrying capacity was determined based on primary productivity using the chlorophyll concentration, which is indicating the existence of phytoplankton in waters. A study was conducted…
Carrying capacity is an ability of aquatic environment to support the life of organism in aquaculture. This research aims to determined carrying capacity based on dissolved oxygen for fish net cage. It was conducted on June-July 2019 in PLTA Koto Panjang Reservoir Batu Bersurat Village. Sampling was determined at 3 locations namely Station 1 (tourism area and arround of this station there were …
The decaying rate is the quantity of organic matter that can be decomposed by bacteria per unit time. To determine the decaying rate or the load of organic matter in the Inundation of PLTA Koto Panjang Reservoir, Batu Bersurat village, research was conducted on June-July 2019. There were three stations namely station 1(tourism area and arround of this station there were palm’s plantation), st…
Mangrove area in the Nagari Gasan Gadang has been damage due to human activities and the damage negatively affects bivalve living in that area. A research aims to understand species and density of bivalve was conducted in July 2019. There were 3 stations with 3 plots/station and 5 sub plots/plot. In each sub plot the bivalve were collected by hand. There were 2 bivalve species present, they we…
In the Nagari Kuranji Hilir river there is a restricted area and it is known as “lubuk larangan”. As it is a habitat for T.tambroides, a rare endemic fish species. A research aims to find out a proper method to manage the Nagari Kuranji Hilir river restricted area in order to safe T.tambroides population was conducted on April to August 2019. A quantitative approach method was applied by ob…
Mangrove ecosistem in Kampung Madong is inhabited by numerous aquatic organism, including fish. This study aims to determine the types of fish caught in the mangrove ecosystem of Kampung Madong. This research was conducted in March-April 2019. The method used in the research was survei method on three sampling area observation with four sampling in a month. The analyzed include morphology, mor…
Batang Mahat River is one of the rivers which empties to PLTA Koto Panjang Dam. Batang Mahat estuary around PLTA Koto Panjang Dam is one of the fishing grounds. This study was aimed to obtain information about the water chemical and physical characteristics and biology (plankton) Batang Mahat around PLTA Koto Panjang Dam. This research was conducted in March-May 2019. The observation stations w…
This study aims to determine the type and abundance of gastropods in the mangrove ecosystem in Madong Village. This research was conducted in July 2019 which is located in Kampung Madong Tanjungpinang Kepulauan Riau. Gastropod sampling using the line transects method. At the research location, there were 3 stations and each station consisted of 3 quadrants measuring 1x1 m. The results of the st…
Ompok hypophthalmus is one of valuable commodity, and it is a native species in the Riau. High intensity of uncontrolled fishing causes the extinction of that species. A research aims to understand the growth rate, mortality, and exploitation rate of the fish in the Lubuk Siam Lake has been conducted in May-July 2019. The fish was sampled using gill nets. Data were analyzed using FiSAT II pro…
The Koto Panjang Hydroelectric Reservoir has changed environmental conditions because of Floating Net Cages (FNC) activities. This condition change the water quality. Zooplankton was biology parameters to determine the changes water quality because zooplankton community is sensitive to changes in aquatic environmental conditions. This research was aims to understand the structure of the zooplan…
Abstract Mangrove forest in the Apar Village has been degraded due to anthroponegic activities. The activities counducted in that area damage the mangrove and thus negatively affects gastropods living in that area. A research aims to identify gastropods species and density was conducted in july 2019. There was 2 stations, with 3 plots/station and 5 subplots/plot. In each subplot, the gastrop…
ABSTRACT Mystus nigriceps is a fish that in habit the Tapung River. To understand the morphometrical and meristical characteristics and growth pattern of this fish, a research had been conducted from April to May 2018. There were 100 fishes (99.68-190.6 mm SL and 4.92-49.32 gr BW) were captured. There were 30 characteristics measured and 9 meristical characteristics counted. Results shown tha…
Abstract Anabas testudineus Bloch is one of freshwater fishes that inhabit in the Lubuk Siam Lake. To understand the type of food consumed by A. testudineus, a research has been conducted at July to August 2019 . Sampling was conducted once/ two weeks interval for two months. There were 97 fishes captured, but 22 of them had empty stomach and they can not be used for stomach content analysis. …
Abstract Rawa Mekar Jaya village is a mangrove conservation forest area. However anthropogenic activities conducted in that area damage the mangrove and thus negatively affects crabs living in that area. A research aims to identify crab species and its density was conducted in July 2019. There were 3 stations, with 3 plots/station and 5 sub plots/plot. In each sub plot, the crab were collect…
ABSTRACT Periphyton is a sessile microscopic organism that attach on certain substrate. A research aims to understand types and abundance of periphyton attached in the lotus leaves present in the Bandar Kayangan dam has been conducted in January to February 2019. There were 3 stations, around floating caged fish culture (Station 1), in the water closed to Tectona grandis plantations (Statio…
Abstract In the Marunggai River there is a restricted area and it is known as “lubuk larangan”, as it is a habitat of Tor tambroides, a rare endemic fish species. A research aims to find out a proper method to manage the Marunggai River restricted area in order to safe the T.tambroides population was conducted in April to August 2019. A quantitative approach method was applied by interview…
ABSTRACT Indragiri River has high biological resources as necton, gastropods, plankton and the others. There are activities antropogenic can affect the distribution of Pilsbryochonca exillis. P. exillis has good ecological and economic potential. This study aimedto determine the distribution and density of P. exillis in the Indragiri river, Lubuk Terentang village, Kuantan Singingi Regency,…
ABSTRACT Peat swamp waters in Sontang Village have experienced land-use changes, due to logging and forest burning activities, will affect the type of Gastropods that live in the peat swamp habitat. This study aims to identify gastropods that live in peat swamp waters in Sontang Village. This research was conducted in April-May 2019, in the sampling areas 1, II and III. Sampling were c…