International journal of fisheries and aquatic research, Mar 1, 2017
Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture... more Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture, shrimps culture and maricultur. With respect to the shrimp culture industry, disease outbreaks have been the primary cause of production loss during the last two decades. Disease outbreaks not only result from the mere presence of a pathogen in the system, a compromised health status of the cultured animals in combination with suboptimal environmental conditions are also factors facilitating disease outbreaks. Therefore, disease prevention and control should not only focus on implementing biosecurity measures, but must be performed in an integral approach involving, among others, adequate nutrition, enhancing the immunity of the cultured animals and maintaining a good water quality. The basic principle of the biofloc system is to recycle waste nutrients, in particular nitrogen, into microbial biomass that can be used in situ by the cultured animals or be harvested and processed into feed ingredients. So far, very few studies investigated the immunological potential of the biofloc technology although it is widely known that microorganisms, their cell components or their metabolites can act as immunostimulants that enhance the shrimp innate immune system and provide improved protection against pathogens.
Research Opinions in Animal & Veterinary Sciences, 2015
The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological... more The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological and biochemical parameters of great sturgeon (H. huso) juveniles for a period of 8 weeks. After 8 weeks of rearing, the mean weight was 527.27±6.82g, 467.91±18.81g and 431.02±24.25g in densities of 1.5, 3 and 6 kg/m2, respectively with no significant differences among treatments (P>0.05). A significant difference (P<0.05) was observed in haematocrit and eosinophil at treatment 1.5 kg/m2 on 30th and 60th day of rearing period, but the other haematological parameters including red blood cells (RBC), and lymphocyte, neutrophil and monocyte showed no significant effect with stocking density (P>0.05). WBC count showed significant increase in 1.5, 3 and 6 kg/m2 at 60 day of the experiment. Cortisol and glucose increased significantly on day 30 at the level of 3 kg/m2. Our results showed that rearing density had no major effect on the growth and some haematological parameters suggesting that great sturgeon exhibited lower stress responses to high stocking density. However, increasing stocking density exhibited significant effect on eosinophil, haematocrit and WBC count as well as cortisol and glucose.
Research Opinions in Animal & Veterinary Sciences, 2015
The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological... more The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological and biochemical parameters of great sturgeon (H. huso) juveniles for a period of 8 weeks. After 8 weeks of rearing, the mean weight was 527.27±6.82g, 467.91±18.81g and 431.02±24.25g in densities of 1.5, 3 and 6 kg/m2, respectively with no significant differences among treatments (P>0.05). A significant difference (P<0.05) was observed in haematocrit and eosinophil at treatment 1.5 kg/m2 on 30th and 60th day of rearing period, but the other haematological parameters including red blood cells (RBC), and lymphocyte, neutrophil and monocyte showed no significant effect with stocking density (P>0.05). WBC count showed significant increase in 1.5, 3 and 6 kg/m2 at 60 day of the experiment. Cortisol and glucose increased significantly on day 30 at the level of 3 kg/m2. Our results showed that rearing density had no major effect on the growth and some haematological parameters suggesting that great sturgeon exhibited lower stress responses to high stocking density. However, increasing stocking density exhibited significant effect on eosinophil, haematocrit and WBC count as well as cortisol and glucose.
The influence of stocking density (1.5, 3 and 6 kg.m-2) was investigated on biochemical plasma in... more The influence of stocking density (1.5, 3 and 6 kg.m-2) was investigated on biochemical plasma including: Cortisol, Glucose and Cholesterol level of Beluga juveniles, for a period of 8 weeks. The mean weight at the start of trial was 143±0.29 g. Concentration of cortisol, glucose and plasma Cholesterol at the start trial was 8.57±1.1 ng.ml-1 , 70.12±3.6 mg.dl-1 , and 46±17.5mg.dl-1 respectively. Cortisol and glucose concentrations showed significantly difference between treatments 3 and 6 kg.m-2 on 30 th day of rearing, but on 60 th day of rearing cortisol and glucose concentrations had no significant difference among treatments. Cholesterol level had significant difference at treatment 1.5 kgm-2 on 30 th and 60 th day of rearing as compared to treatment 3 and 6 kg.m-2 and control group, Cholesterol concentration had no significant difference among treatments 3 and 6 kg.m-2. Results showed that rearing density had no a major effect on the growth, biochemical parameters of Beluga.
Abstract The increasing demand for aquatic products has caused the need to increase production, t... more Abstract The increasing demand for aquatic products has caused the need to increase production, trying to minimize environmental damage, which has begun to be succeeded with the recent development of new systems such as bioflocs technology (BFT), which is based on the manipulation of Carbon to Nitrogen (C/N) ratios. So, the purpose of this study was to evaluate the effects of increasing C/N ratios with different dietary protein levels in bioflocs (BFT) system on growth performance, body composition, water quality and blood biochemical parameters of juvenile common carp. A total number of 750 fish with initial average weight of 17 ± 0.05 g were randomly divided and stocked into 30 fiberglass tanks with a volume of approximately 250 L of water (1.7 kg/m3). Treatments used in this study included 3 levels of C/N ratio, (C/N15, C/N20, C/N25) and 3 levels of dietary protein contained 25%, 30% and 35% in three replicates with a control group contained 35% dietary protein and water change during the 8 weeks of experiment. Fish were fed three times a day with the different diets at the daily rate of 3% body weight. Also, molasses just was added as a carbon sources to the bioflocs treatments after each feeding. Based on the result, the poor growth parameters and feed utilization were observed in C/N ratio of 25 at 35% dietary protein which were significantly different compared with control. The result of body composition showed that different C/N ratios at different dietary protein levels significantly effected body composition of fish in compared with control. The blood biochemical parameters showed different C/N ratios at different dietary protein levels significantly affected the amount of total protein, globulin, albumin and glucose values of fish in BFT treatments compared with control. Furthermore, the C/N ratio of 15 showed the lower variation of water total ammonia and nitrite than other C/N ratios in different dietary protein levels. In general, growth and feeding parameters, body composition, blood biochemical parameters of fish and water quality was suitable for common carp juveniles rearing in bioflocs system with C/N ratio of 15 at 25% dietary protein level.
Effects of feeding frequency on growth, feed conversion ratio, survival rate and water quality of... more Effects of feeding frequency on growth, feed conversion ratio, survival rate and water quality of white leg shrimp (Litopenaeus vannamei, Abstract This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ratio and survival rate of white leg shrimp (Litopenaeus vannamei) post-larvae in 56 days. Final mean weights obtained for 2 and 4 times/day (6.73 ± 0.09 g and 6.98 ± 0.15 g, respectively) were significantly lower than treatment 6 times/day (8.56 ± 0.16 g) (P<0.05). There was significant difference for feed conversion ratio (FCR) of treatment 6 times/day with treatments 2 and 4 times/day (P<0.05) and the best FCR value was obtained from treatment 6 daily feeding. Special growth rate (SGR) of shrimps were fed 6 times /day was significantly higher than other types of feeding (3.05 ± 0.05%, P<0.05).Best survival rate was obtained in 6 times per day treatment. Salinity, dissolved oxygen and temperature had no difference among treatments (P&...
The influence of stocking density (1.5, 3 and 6 kg.m -2 ) was investigated on biochemical plasma ... more The influence of stocking density (1.5, 3 and 6 kg.m -2 ) was investigated on biochemical plasma including: Cortisol, Glucose and Cholesterol level of Beluga juveniles, for a period of 8 weeks. The mean weight at the start of trial was 143±0.29 g. Concentration of cortisol, glucose and plasma Cholesterol at the start trial was 8.57±1.1 ng.ml -1 , 70.12±3.6 mg.dl -1 , and 46±17.5mg.dl -1 respectively. Cortisol and glucose concentrations showed significantly difference between treatments 3 and 6 kg.m -2 on 30 th day of rearing, but on 60 th day of rearing cortisol and glucose concentrations had no significant difference among treatments. Cholesterol level had significant difference at treatment 1.5 kgm -2 on 30 th and 60 th day of rearing as compared to treatment 3 and 6 kg.m -2 and control group, Cholesterol concentration had no significant difference among treatments 3 and 6 kg.m -2 . Results showed that rearing density had no a major effect on the growth, biochemical parameters of ...
Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture... more Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture, shrimps culture and maricultur. With respect to the shrimp culture industry, disease outbreaks have been the primary cause of production loss during the last two decades. Disease outbreaks not only result from the mere presence of a pathogen in the system, a compromised health status of the cultured animals in combination with suboptimal environmental conditions are also factors facilitating disease outbreaks. Therefore, disease prevention and control should not only focus on implementing biosecurity measures, but must be performed in an integral approach involving, among others, adequate nutrition, enhancing the immunity of the cultured animals and maintaining a good water quality. The basic principle of the biofloc system is to recycle waste nutrients, in particular nitrogen, into microbial biomass that can be used in situ by the cultured animals or be harvested and processed into feed ingredients. So far, very few studies investigated the immunological potential of the biofloc technology although it is widely known that microorganisms, their cell components or their metabolites can act as immunostimulants that enhance the shrimp innate immune system and provide improved protection against pathogens.
International Journal of Fisheries and Aquatic Studies, 2016
This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ra... more This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ratio and survival rate of white leg shrimp (Litopenaeus vannamei) post-larvae in 56 days. Final mean weights obtained for 2 and 4 times/day (6.73 ± 0.09 g and 6.98 ± 0.15 g, respectively) were significantly lower than treatment 6 times/day (8.56 ± 0.16 g) (P
International Journal of Fisheries and Aquatic Studies, 2019
The aims of the research are to determine the hematological response of Java Barb which is expose... more The aims of the research are to determine the hematological response of Java Barb which is exposed to heavy metal lead (Pb) at different doses. Water pollution occurs due to industrial activities that contain toxic materials which are increasing with the development of industrialization. One of the heavy metals that cause pollution in Sidoarjo, East Java Indonesia waters is lead (Pb). Heavy metal in waters at can affect the life of aquatic biota, especially fish. Lead (Pb) enter the body of an organism through the food chain, gills or diffusion through the surface of the skin. Lead enters the fish cause toxic effect that increase in oxidative stress, organ damage and changes in the biochemical profile of the blood which indicates metabolism in the body is disturbed. Metabolic disorders will affect the growth of cultivated fish Java Barb (Barbonymus gonionotus), is one type of freshwater fish that is widely cultivated in Indonesia but is very sensitive to changes of water quality. The research was an experimental using a completely randomized design consisting of 5 treatments and 4 replications. The treatment are differences in lead doses, namely A (0 ppm), B (0.66 ppm), C (1.32 ppm), D (1.98 ppm) and E (2.65 ppm). The parameters of observation were total erythrocytes, hemoglobin, total leukocytes and leukocytes differential, blood glucose and cortisol. Data obtained were analyzed using Anova to determine the effect of treatment. Differences between treatments were analyzed using Duncan's multiple distance test. The results showed that distribution of different lead doses increase the number of leukocytes and reduce the total erythrocytes, hemoglobin hematocrit, leukocytes differential, blood glucose and cortisol.
The increasing demand or aquatic products has caused the need to increase production, trying to m... more The increasing demand or aquatic products has caused the need to increase production, trying to minimize environmental damage, which has begun to be succeeded with the recent development o new systems such as biofocs technology (BFT), which is based on the manipulation o Carbon to Nitrogen (C/N) ratios. So, the purpose o this study was to evaluate the eeects o increasing C/N ratios with dierent dietary protein levels in biofocs (BFT) system on growth perrormance, body composition, water quality and blood biochemical parameters o juvenile common carp. A total number o 750 sh with initial average weight o 17 ± 0.05 g were randomly divided and stocked into 30 berglass tanks with a volume oo approximately 250 L o water (1.7 kg/ m 3). Treatments used in this study included 3 levels o C/N ratio, (C/N15, C/N20, C/N25) and 3 levels o dietary protein contained 25%, 30% and 35% in three replicates with a control group contained 35% dietary protein and water change during the 8 weeks oo experiment. Fish were ed three times a day with the diierent diets at the daily rate o 3% body weight. Also, molasses just was added as a carbon sources to the biofocs treatments ater each eeding. Based on the result, the poor growth parameters and eed utilization were observed in C/N ratio o 25 at 35% dietary protein which were signiicantly diierent compared with control. The result o body composition showed that diierent C/N ratios at diierent dietary protein levels signicantly eected body composition oo sh in compared with control. The blood biochemical parameters showed diierent C/N ratios at dii-erent dietary protein levels signiicantly aaected the amount o total protein, globulin, albumin and glucose values o sh in BFT treatments compared with control. Furthermore, the C/N ratio o 15 showed the lower variation o water total ammonia and nitrite than other C/N ratios in dierent dietary protein levels. In general, growth and eeding parameters, body composition, blood biochemical parameters o sh and water quality was suitable or common carp juveniles rearing in biofocs system with C/N ratio oo 15 at 25% dietary protein level.
The present study was conducted for a period of one year from April 2016 to March 2017 to identif... more The present study was conducted for a period of one year from April 2016 to March 2017 to identify the present status and threats to fish diversity in the wetlands of Chhatak, Bangladesh. A total of 71 fish species, including prawn under 11 orders and 25 families were recorded from the wetlands. Cypriniformes (32.38%) was the most dominant order, followed by Siluriformes (25.35%), Perciformes (19.72%), Synbranchiformes and Channiformes (5.63%), Clupeiformes (4.23%), Decapoda (4.23%), Beloniformes (2.82%), Osteoglossiformes (2.82%), Tetraodontiformes (1.41%) and Cyprinodontiformes (1.41%). Cyprinidae was the most dominant family contributing 20 species. The recorded species were categorized on the basis of availability into four statuses and found as available (40.85%), less available (29.58%), rare (14.08%) and very rare (15.49%). The present study suggested that use of appropriate fishing gears, establishment of the sanctuary, community based fisheries management, stocking of commercially important fish species, implementation of fishing laws and regulation, Government support and fishermen's awareness can save the valuable fish diversity of the study area.
International journal of fisheries and aquatic research, Mar 1, 2017
Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture... more Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture, shrimps culture and maricultur. With respect to the shrimp culture industry, disease outbreaks have been the primary cause of production loss during the last two decades. Disease outbreaks not only result from the mere presence of a pathogen in the system, a compromised health status of the cultured animals in combination with suboptimal environmental conditions are also factors facilitating disease outbreaks. Therefore, disease prevention and control should not only focus on implementing biosecurity measures, but must be performed in an integral approach involving, among others, adequate nutrition, enhancing the immunity of the cultured animals and maintaining a good water quality. The basic principle of the biofloc system is to recycle waste nutrients, in particular nitrogen, into microbial biomass that can be used in situ by the cultured animals or be harvested and processed into feed ingredients. So far, very few studies investigated the immunological potential of the biofloc technology although it is widely known that microorganisms, their cell components or their metabolites can act as immunostimulants that enhance the shrimp innate immune system and provide improved protection against pathogens.
Research Opinions in Animal & Veterinary Sciences, 2015
The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological... more The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological and biochemical parameters of great sturgeon (H. huso) juveniles for a period of 8 weeks. After 8 weeks of rearing, the mean weight was 527.27±6.82g, 467.91±18.81g and 431.02±24.25g in densities of 1.5, 3 and 6 kg/m2, respectively with no significant differences among treatments (P&gt;0.05). A significant difference (P&lt;0.05) was observed in haematocrit and eosinophil at treatment 1.5 kg/m2 on 30th and 60th day of rearing period, but the other haematological parameters including red blood cells (RBC), and lymphocyte, neutrophil and monocyte showed no significant effect with stocking density (P&gt;0.05). WBC count showed significant increase in 1.5, 3 and 6 kg/m2 at 60 day of the experiment. Cortisol and glucose increased significantly on day 30 at the level of 3 kg/m2. Our results showed that rearing density had no major effect on the growth and some haematological parameters suggesting that great sturgeon exhibited lower stress responses to high stocking density. However, increasing stocking density exhibited significant effect on eosinophil, haematocrit and WBC count as well as cortisol and glucose.
Research Opinions in Animal & Veterinary Sciences, 2015
The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological... more The influence of stocking density (1.5, 3 and 6 kg/m2) was investigated on weight, haematological and biochemical parameters of great sturgeon (H. huso) juveniles for a period of 8 weeks. After 8 weeks of rearing, the mean weight was 527.27±6.82g, 467.91±18.81g and 431.02±24.25g in densities of 1.5, 3 and 6 kg/m2, respectively with no significant differences among treatments (P&gt;0.05). A significant difference (P&lt;0.05) was observed in haematocrit and eosinophil at treatment 1.5 kg/m2 on 30th and 60th day of rearing period, but the other haematological parameters including red blood cells (RBC), and lymphocyte, neutrophil and monocyte showed no significant effect with stocking density (P&gt;0.05). WBC count showed significant increase in 1.5, 3 and 6 kg/m2 at 60 day of the experiment. Cortisol and glucose increased significantly on day 30 at the level of 3 kg/m2. Our results showed that rearing density had no major effect on the growth and some haematological parameters suggesting that great sturgeon exhibited lower stress responses to high stocking density. However, increasing stocking density exhibited significant effect on eosinophil, haematocrit and WBC count as well as cortisol and glucose.
The influence of stocking density (1.5, 3 and 6 kg.m-2) was investigated on biochemical plasma in... more The influence of stocking density (1.5, 3 and 6 kg.m-2) was investigated on biochemical plasma including: Cortisol, Glucose and Cholesterol level of Beluga juveniles, for a period of 8 weeks. The mean weight at the start of trial was 143±0.29 g. Concentration of cortisol, glucose and plasma Cholesterol at the start trial was 8.57±1.1 ng.ml-1 , 70.12±3.6 mg.dl-1 , and 46±17.5mg.dl-1 respectively. Cortisol and glucose concentrations showed significantly difference between treatments 3 and 6 kg.m-2 on 30 th day of rearing, but on 60 th day of rearing cortisol and glucose concentrations had no significant difference among treatments. Cholesterol level had significant difference at treatment 1.5 kgm-2 on 30 th and 60 th day of rearing as compared to treatment 3 and 6 kg.m-2 and control group, Cholesterol concentration had no significant difference among treatments 3 and 6 kg.m-2. Results showed that rearing density had no a major effect on the growth, biochemical parameters of Beluga.
Abstract The increasing demand for aquatic products has caused the need to increase production, t... more Abstract The increasing demand for aquatic products has caused the need to increase production, trying to minimize environmental damage, which has begun to be succeeded with the recent development of new systems such as bioflocs technology (BFT), which is based on the manipulation of Carbon to Nitrogen (C/N) ratios. So, the purpose of this study was to evaluate the effects of increasing C/N ratios with different dietary protein levels in bioflocs (BFT) system on growth performance, body composition, water quality and blood biochemical parameters of juvenile common carp. A total number of 750 fish with initial average weight of 17 ± 0.05 g were randomly divided and stocked into 30 fiberglass tanks with a volume of approximately 250 L of water (1.7 kg/m3). Treatments used in this study included 3 levels of C/N ratio, (C/N15, C/N20, C/N25) and 3 levels of dietary protein contained 25%, 30% and 35% in three replicates with a control group contained 35% dietary protein and water change during the 8 weeks of experiment. Fish were fed three times a day with the different diets at the daily rate of 3% body weight. Also, molasses just was added as a carbon sources to the bioflocs treatments after each feeding. Based on the result, the poor growth parameters and feed utilization were observed in C/N ratio of 25 at 35% dietary protein which were significantly different compared with control. The result of body composition showed that different C/N ratios at different dietary protein levels significantly effected body composition of fish in compared with control. The blood biochemical parameters showed different C/N ratios at different dietary protein levels significantly affected the amount of total protein, globulin, albumin and glucose values of fish in BFT treatments compared with control. Furthermore, the C/N ratio of 15 showed the lower variation of water total ammonia and nitrite than other C/N ratios in different dietary protein levels. In general, growth and feeding parameters, body composition, blood biochemical parameters of fish and water quality was suitable for common carp juveniles rearing in bioflocs system with C/N ratio of 15 at 25% dietary protein level.
Effects of feeding frequency on growth, feed conversion ratio, survival rate and water quality of... more Effects of feeding frequency on growth, feed conversion ratio, survival rate and water quality of white leg shrimp (Litopenaeus vannamei, Abstract This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ratio and survival rate of white leg shrimp (Litopenaeus vannamei) post-larvae in 56 days. Final mean weights obtained for 2 and 4 times/day (6.73 ± 0.09 g and 6.98 ± 0.15 g, respectively) were significantly lower than treatment 6 times/day (8.56 ± 0.16 g) (P<0.05). There was significant difference for feed conversion ratio (FCR) of treatment 6 times/day with treatments 2 and 4 times/day (P<0.05) and the best FCR value was obtained from treatment 6 daily feeding. Special growth rate (SGR) of shrimps were fed 6 times /day was significantly higher than other types of feeding (3.05 ± 0.05%, P<0.05).Best survival rate was obtained in 6 times per day treatment. Salinity, dissolved oxygen and temperature had no difference among treatments (P&...
The influence of stocking density (1.5, 3 and 6 kg.m -2 ) was investigated on biochemical plasma ... more The influence of stocking density (1.5, 3 and 6 kg.m -2 ) was investigated on biochemical plasma including: Cortisol, Glucose and Cholesterol level of Beluga juveniles, for a period of 8 weeks. The mean weight at the start of trial was 143±0.29 g. Concentration of cortisol, glucose and plasma Cholesterol at the start trial was 8.57±1.1 ng.ml -1 , 70.12±3.6 mg.dl -1 , and 46±17.5mg.dl -1 respectively. Cortisol and glucose concentrations showed significantly difference between treatments 3 and 6 kg.m -2 on 30 th day of rearing, but on 60 th day of rearing cortisol and glucose concentrations had no significant difference among treatments. Cholesterol level had significant difference at treatment 1.5 kgm -2 on 30 th and 60 th day of rearing as compared to treatment 3 and 6 kg.m -2 and control group, Cholesterol concentration had no significant difference among treatments 3 and 6 kg.m -2 . Results showed that rearing density had no a major effect on the growth, biochemical parameters of ...
Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture... more Disease remains a limiting factor for the aquaculture industry including fresh waters aquaculture, shrimps culture and maricultur. With respect to the shrimp culture industry, disease outbreaks have been the primary cause of production loss during the last two decades. Disease outbreaks not only result from the mere presence of a pathogen in the system, a compromised health status of the cultured animals in combination with suboptimal environmental conditions are also factors facilitating disease outbreaks. Therefore, disease prevention and control should not only focus on implementing biosecurity measures, but must be performed in an integral approach involving, among others, adequate nutrition, enhancing the immunity of the cultured animals and maintaining a good water quality. The basic principle of the biofloc system is to recycle waste nutrients, in particular nitrogen, into microbial biomass that can be used in situ by the cultured animals or be harvested and processed into feed ingredients. So far, very few studies investigated the immunological potential of the biofloc technology although it is widely known that microorganisms, their cell components or their metabolites can act as immunostimulants that enhance the shrimp innate immune system and provide improved protection against pathogens.
International Journal of Fisheries and Aquatic Studies, 2016
This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ra... more This study is conducted to evaluate the effect of feeding frequency on growth, feed conversion ratio and survival rate of white leg shrimp (Litopenaeus vannamei) post-larvae in 56 days. Final mean weights obtained for 2 and 4 times/day (6.73 ± 0.09 g and 6.98 ± 0.15 g, respectively) were significantly lower than treatment 6 times/day (8.56 ± 0.16 g) (P
International Journal of Fisheries and Aquatic Studies, 2019
The aims of the research are to determine the hematological response of Java Barb which is expose... more The aims of the research are to determine the hematological response of Java Barb which is exposed to heavy metal lead (Pb) at different doses. Water pollution occurs due to industrial activities that contain toxic materials which are increasing with the development of industrialization. One of the heavy metals that cause pollution in Sidoarjo, East Java Indonesia waters is lead (Pb). Heavy metal in waters at can affect the life of aquatic biota, especially fish. Lead (Pb) enter the body of an organism through the food chain, gills or diffusion through the surface of the skin. Lead enters the fish cause toxic effect that increase in oxidative stress, organ damage and changes in the biochemical profile of the blood which indicates metabolism in the body is disturbed. Metabolic disorders will affect the growth of cultivated fish Java Barb (Barbonymus gonionotus), is one type of freshwater fish that is widely cultivated in Indonesia but is very sensitive to changes of water quality. The research was an experimental using a completely randomized design consisting of 5 treatments and 4 replications. The treatment are differences in lead doses, namely A (0 ppm), B (0.66 ppm), C (1.32 ppm), D (1.98 ppm) and E (2.65 ppm). The parameters of observation were total erythrocytes, hemoglobin, total leukocytes and leukocytes differential, blood glucose and cortisol. Data obtained were analyzed using Anova to determine the effect of treatment. Differences between treatments were analyzed using Duncan's multiple distance test. The results showed that distribution of different lead doses increase the number of leukocytes and reduce the total erythrocytes, hemoglobin hematocrit, leukocytes differential, blood glucose and cortisol.
The increasing demand or aquatic products has caused the need to increase production, trying to m... more The increasing demand or aquatic products has caused the need to increase production, trying to minimize environmental damage, which has begun to be succeeded with the recent development o new systems such as biofocs technology (BFT), which is based on the manipulation o Carbon to Nitrogen (C/N) ratios. So, the purpose o this study was to evaluate the eeects o increasing C/N ratios with dierent dietary protein levels in biofocs (BFT) system on growth perrormance, body composition, water quality and blood biochemical parameters o juvenile common carp. A total number o 750 sh with initial average weight o 17 ± 0.05 g were randomly divided and stocked into 30 berglass tanks with a volume oo approximately 250 L o water (1.7 kg/ m 3). Treatments used in this study included 3 levels o C/N ratio, (C/N15, C/N20, C/N25) and 3 levels o dietary protein contained 25%, 30% and 35% in three replicates with a control group contained 35% dietary protein and water change during the 8 weeks oo experiment. Fish were ed three times a day with the diierent diets at the daily rate o 3% body weight. Also, molasses just was added as a carbon sources to the biofocs treatments ater each eeding. Based on the result, the poor growth parameters and eed utilization were observed in C/N ratio o 25 at 35% dietary protein which were signiicantly diierent compared with control. The result o body composition showed that diierent C/N ratios at diierent dietary protein levels signicantly eected body composition oo sh in compared with control. The blood biochemical parameters showed diierent C/N ratios at dii-erent dietary protein levels signiicantly aaected the amount o total protein, globulin, albumin and glucose values o sh in BFT treatments compared with control. Furthermore, the C/N ratio o 15 showed the lower variation o water total ammonia and nitrite than other C/N ratios in dierent dietary protein levels. In general, growth and eeding parameters, body composition, blood biochemical parameters o sh and water quality was suitable or common carp juveniles rearing in biofocs system with C/N ratio oo 15 at 25% dietary protein level.
The present study was conducted for a period of one year from April 2016 to March 2017 to identif... more The present study was conducted for a period of one year from April 2016 to March 2017 to identify the present status and threats to fish diversity in the wetlands of Chhatak, Bangladesh. A total of 71 fish species, including prawn under 11 orders and 25 families were recorded from the wetlands. Cypriniformes (32.38%) was the most dominant order, followed by Siluriformes (25.35%), Perciformes (19.72%), Synbranchiformes and Channiformes (5.63%), Clupeiformes (4.23%), Decapoda (4.23%), Beloniformes (2.82%), Osteoglossiformes (2.82%), Tetraodontiformes (1.41%) and Cyprinodontiformes (1.41%). Cyprinidae was the most dominant family contributing 20 species. The recorded species were categorized on the basis of availability into four statuses and found as available (40.85%), less available (29.58%), rare (14.08%) and very rare (15.49%). The present study suggested that use of appropriate fishing gears, establishment of the sanctuary, community based fisheries management, stocking of commercially important fish species, implementation of fishing laws and regulation, Government support and fishermen's awareness can save the valuable fish diversity of the study area.
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