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M C J Verdegem - One of the best experts on this subject based on the ideXlab platform.
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Stocking Density dependent growth of dover sole solea solea
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P <0.06). A significant relation between Stocking Density and productivity was found. Productivity peaked at a Stocking Density of 7.4 kg/m2. The underlying mechanisms causing reduced average individual growth with increasing Stocking densities are still poorly understood. Therefore, systematic behavioural studies focusing on the mechanisms causing depressed growth with increasing Stocking Density are recommended for future research.
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Stocking Density-dependent growth of Dover sole (Solea solea)
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P
E Schram - One of the best experts on this subject based on the ideXlab platform.
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Stocking Density dependent growth of dover sole solea solea
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P <0.06). A significant relation between Stocking Density and productivity was found. Productivity peaked at a Stocking Density of 7.4 kg/m2. The underlying mechanisms causing reduced average individual growth with increasing Stocking densities are still poorly understood. Therefore, systematic behavioural studies focusing on the mechanisms causing depressed growth with increasing Stocking Density are recommended for future research.
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Stocking Density-dependent growth of Dover sole (Solea solea)
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P
Dapeng Li - One of the best experts on this subject based on the ideXlab platform.
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high Stocking Density alters growth performance blood biochemistry intestinal histology and muscle quality of channel catfish ictalurus punctatus
Aquaculture, 2018Co-Authors: Mohamed M Refaey, Dapeng Li, Xing Tian, Zhimin Zhang, Xi Zhang, Li Li, Rong TangAbstract:Abstract Stocking Density is one of the major factors affecting production and welfare of fish in aquaculture. This study investigated the effect of different Stocking densities on growth, feed efficiency, blood biochemistry, histometric response, muscular composition, and flesh quality of channel catfish Ictalurus punctatus. Fish were cultured at low, medium, and high Stocking Density of 50, 150, and 300 fish m−3, respectively, for 60 days in the recirculating aquaculture system. Fish growth and feed efficiency significantly decreased with increasing Stocking Density. Serum concentrations of glucose, triglyceride, and total cholesterol, as well as the activities of both aspartate aminotransferase and alanine aminotransferase, significantly elevated as Stocking Density increased. High Stocking Density led to the decline in serum levels of thyroid hormones. The villi length and its number, as well as the size of goblet cells in the intestine, were negatively affected by high Stocking Density. There was a significant Density-dependent decrease in muscular fat content, diameter of dorsal muscle fiber, intensity of muscular bundles, and percentage of muscular bundles area in dorsal muscle. However, the percentage of the intramuscular connective tissue showed a significant increase in fish reared at high Stocking Density. Fish stocked in high Density exhibited the decrease in muscle pH, drip loss, and frozen leakage rate. Overall, the increased Stocking Density could cause the unfavorable impacts on growth, feed efficiency, histological change, and flesh quality of I. punctatus.
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effect of Stocking Density on growth and serum concentrations of thyroid hormones and cortisol in amur sturgeon acipenser schrenckii
Fish Physiology and Biochemistry, 2012Co-Authors: Dapeng LiAbstract:This study investigated the effects of different Stocking densities on growth and serum concentrations of thyroid hormones and cortisol in Amur sturgeon, Acipenser schrenckii. Fish were reared at low, medium, and high Stocking densities (initial experimental densities were 0.30, 0.75, and 1.78 kg m−2, respectively) for 70 days. The results showed that high Stocking Density had negative effects on growth and feeding efficiency, and altered serum levels of thyroid hormones and cortisol in Amur sturgeon. A significant decrease in specific growth rate was observed as Stocking Density was increased. The feeding rate decreased significantly in the medium and high Density groups, indicating that high Stocking Density reduced the food consumption of sturgeon. Food conversion ratio increased with increasing Stocking Density, suggesting that high Stocking Density might inhibit fish growth through decreasing food conversion efficiency. Serum concentrations of total triiodothyronine, free thyroxine, and free triiodothyronine were inversely related to Stocking densities, whereas serum total thyroxine level of sturgeon stocked at different densities remained stable. Also, higher Stocking Density resulted in an elevation of serum cortisol level, indicating that the sturgeon stocked at the higher Density experienced Density-dependent physiological stress. These results suggest growth suppression caused by high Stocking Density might be related to both crowding stress and the declines in peripheral circulating levels of thyroid hormones, as well as associated with the reductions in both food consumption and food conversion efficiency.
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Effect of Stocking Density on growth of juvenile Acipenser schrenckii
Journal of Applied Ecology, 2002Co-Authors: Ping Zhuang, Dapeng Li, Mingxue Wang, Zheng Zhang, Longzhen Zhang, Tao ZhangAbstract:: The effect of Stocking Density on growth of juveniles Acipenser schrenckii was studied, and the results showed that juveniles Acipenser schrenckii reared for 28 days in a flowing water system under different Stocking densities of 0.232, 0.665, 1.347, and 2.469 kg.m-2 grew in allometry. There were no significant differences between the final and initial SV under the four treatments. The growth efficiency, DWG, NY, and SGR of juveniles were decreased with the increase of Stocking densities. However, the FCR and NY were increased with the increase of Stocking densities. There were significant differences between these parameters under the low and high densities treatment after 28 days. Moreover, there was a significant negative linear correlation between Stocking Density (D) and special growth rate (SGR).
J W Van Der Heul - One of the best experts on this subject based on the ideXlab platform.
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Stocking Density dependent growth of dover sole solea solea
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P <0.06). A significant relation between Stocking Density and productivity was found. Productivity peaked at a Stocking Density of 7.4 kg/m2. The underlying mechanisms causing reduced average individual growth with increasing Stocking densities are still poorly understood. Therefore, systematic behavioural studies focusing on the mechanisms causing depressed growth with increasing Stocking Density are recommended for future research.
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Stocking Density-dependent growth of Dover sole (Solea solea)
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P
A Kamstra - One of the best experts on this subject based on the ideXlab platform.
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Stocking Density dependent growth of dover sole solea solea
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P <0.06). A significant relation between Stocking Density and productivity was found. Productivity peaked at a Stocking Density of 7.4 kg/m2. The underlying mechanisms causing reduced average individual growth with increasing Stocking densities are still poorly understood. Therefore, systematic behavioural studies focusing on the mechanisms causing depressed growth with increasing Stocking Density are recommended for future research.
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Stocking Density-dependent growth of Dover sole (Solea solea)
Aquaculture, 2006Co-Authors: E Schram, J W Van Der Heul, A Kamstra, M C J VerdegemAbstract:Dover sole were reared at 6 different Stocking densities between 0.56 and 12.6 kg/m2 with duplicate tanks for each treatment. The experiment lasted for 55 days. Water quality effects on growth were minimised by making the flow rate per tank proportional to the feeding load. Individual initial and final weights were determined for all fishes to calculate the specific growth rate and the coefficient of variation within each culture tank. The specific growth rate of Dover sole significantly decreased with increasing Stocking Density. Mortality increased significantly with increasing Stocking Density. The difference between initial and final CV (?CV) increased with Stocking Density (P
