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Tactile Pleasures and Female Subjectivity in Kate Chopin’s A Pair of Silk Stockings 认领 引用
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作者 Mengyao Li 《Journal of Contemporary Educational Research》 2026年第5期329-336,共8页
This paper analyzes Kate Chopin’s novella A Pair of Silk Stockings using a dual perspective of sensory criticism and haptic aesthetics to shift the attention from the usual readings based on themes of consumerism and... This paper analyzes Kate Chopin’s novella A Pair of Silk Stockings using a dual perspective of sensory criticism and haptic aesthetics to shift the attention from the usual readings based on themes of consumerism and mother-daughter conflict.The paper proposes that the use of a sensorial lens to investigate the experiences of women in Kate Chopin’s literature would enable us to gain a more detailed appreciation of the nature of female subjectivity as portrayed in her writing.Using the concept of embodied perception in a detailed analysis of tactile encounters experienced by the character Mrs.Sommers,this paper attempts to illustrate how tactile pleasures enable her brief moments of embodied agency where she transcends her designated social roles. 展开更多
关键词 Kate Chopin A Pair of Silk Stockings Haptic aesthetics Sensory criticism Female subjec
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Effects of stocking rate on growth performance,energy and nitrogen utilization,methane emission,and grazing behavior in Tan sheep grazed on typical steppe 认领 引用 被引量：2
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作者 Hairen Shi Pei Guo +8 位作者 Jieyan Zhou Zhen Wang Meiyue He Liyuan Shi Xiaojuan Huang Penghui Guo Zhaoxia Guo Yuwen Zhang Fujiang Hou 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2025年第4期1234-1245,共12页
Understanding livestock performance in typical steppe ecosystems is essential for optimizing grassland-livestock interactions and minimizing environmental impact.To assess the effects of different stocking rates on th... Understanding livestock performance in typical steppe ecosystems is essential for optimizing grassland-livestock interactions and minimizing environmental impact.To assess the effects of different stocking rates on the growth performance,energy and nitrogen utilization,methane(CH4)emissions,and grazing behavior of Tan sheep,a 2-year grazing experiment in the typical steppe was conducted.The grazing area was divided into 9 paddocks,each 0.5 ha,with 3 spatial replicates for each stocking rate treatment(4,8,and 13 sheep per paddock),corresponding to 2.7,5.3,and 8.7 sheep ha–1.The results showed that the neutral detergent fiber(NDF)and acid detergent fiber(ADF)contents of herbage varied between grazing years(P<0.05),with a positive correlation between stocking rate and crude fiber content in the herbage(P<0.05).Dry matter intake(DMI)decreased with increasing stocking rate(P<0.05),and the average daily gain(ADG)was highest at 2.7 sheep ha–1(P<0.05).Compared to 2.7 and 8.7 sheep ha–1,the5.3 sheep ha–1treatment exhibited the lowest nutrient digestibility for dry matter,nitrogen,and ether extract(P<0.05).Fecal nitrogen was lowest at 8.7 sheep ha–1(P<0.05),while retained nitrogen as a proportion of nitrogen intake was highest.Digestive energy(DE),metabolic energy(ME),and the ratios of DE to gross energy(GE)and ME to GE were highest at 8.7 sheep ha–1(P<0.05).In contrast,CH_4 emissions,CH_4 per DMI,and CH4E as a proportion of GE were highest at 2.7 sheep ha–1(P<0.05).Stocking rate and grazing year did not significantly affect rumen fermentation parameters,including volatile fatty acids,acetate,propionate,and the acetate/propionate ratio.At 8.7sheep ha–1,daily grazing time and inter-individual distance increased,while time allocated to grazing,walking,and ruminatingesting decreased as stocking rates increased(P<0.05).This study highlights the importance of adjusting stocking rates based on the nutritional value of forage and grazing year to optimize grazing management. 展开更多
关键词 stocking rate methane emissions energy and nitrogen utilization grazing behavior
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Visualization of strontium marking in dorsal fin rays of Megalobrama amblycephala for fish stocking 认领 引用
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作者 Tao JIANG Yahua ZHU +4 位作者 Hongbo LIU Xiubao CHEN Junren XUE Quinton PHELPS Jian YANG 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2025年第3期1014-1021,共8页
Hatchery release is a common and effective practice for protecting and restoring wild resources,and the success of the practice is commonly assessed using mark-recapture technology.We investigated the use of different... Hatchery release is a common and effective practice for protecting and restoring wild resources,and the success of the practice is commonly assessed using mark-recapture technology.We investigated the use of different dimensional X-ray imaging techniques for the strontium(Sr)marking of fish fin rays for stocking.Megalobrama amblycephala juveniles were marked by culturing specimens in 800-mg/L SrCl2·6 H2O solution,the cross-sections of dorsal fin rays were subsequently obtained,and the concentrations Sr was analyzed by 2 D imaging using an electron probe X-ray microanalyzer.Our preliminary findings indicate that the immersion marking method is effective for the Sr marking of fin rays in experimental fish.Moreover,we generated a bird’s-eye-view 3 D mesh image of the Sr concentrations,which can provide a more comprehensive information for fish stocking than that using normal 2 D imaging. 展开更多
关键词 fishery restocking stock enhancement calcified tissue chemical marking microchemistry effectiveness evaluation
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The billion-dollar business hidden in stockings:How the silver economy influences medical textile industry 认领 引用
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作者 Zhong Mengxia 《China Textile》 2025年第4期24-25,共2页
Driven by the accelerating global aging population and increasing health consciousness, compression stocking market is experiencing rapid growth. According to the latest data from Grand View Research, the global compr... Driven by the accelerating global aging population and increasing health consciousness, compression stocking market is experiencing rapid growth. According to the latest data from Grand View Research, the global compression therapy market reached $4.25 billion in 2024, with medical compression stockings, as a core segment, boasting a compound annual growth rate(CAGR) of nearly 6%. 展开更多
关键词 silver economy compression therapy medical textile industry compression stocking market global compression therapy market health consciousness aging population compound annual growth rate
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Dietary organic acids ameliorate high stocking density stress-induced intestinal inflammation through the restoration of intestinal microbiota in broilers 认领 引用 被引量：14
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作者 Dong Dai Guanghai Qi +5 位作者 Jing Wang Haijun Zhang Kai Qiu Yanming Han Yuanyuan Wu Shugeng Wu 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2023年第2期745-759,共15页
Background:High stocking density(HSD)stress has detrimental effects on growth performance,intestinal barrier function,and intestinal microbiota in intensive animal production.Organic acids(OA)are widely used as feed a... Background:High stocking density(HSD)stress has detrimental effects on growth performance,intestinal barrier function,and intestinal microbiota in intensive animal production.Organic acids(OA)are widely used as feed addi-tives for their ability to improve growth performance and intestinal health in poultry.However,whether dietary OA can ameliorate HSD stress-induced impaired intestinal barrier in broilers remains elusive.In this study,a total of 528 one-day-old male Arbor Acres broilers were randomly allocated into 3 treatments with 12 replicates per treatment including 10 birds for normal stocking density and 17 birds for HSD.The dietary treatments were as follows:1)Normal stocking density+basal diet;2)HSD+basal diets;3)HSD+OA.Results:HSD stress can induce increased levels of serum corticosterone,lipopolysaccharides,interleukin-1β,tumor necrosis factor-α,and down-regulated mRNA expression of ZO-1,resulting in compromised growth performance of broilers(P<0.05).Dietary OA could significantly reduce levels of serum corticosterone,lipopolysaccharides,interleukin-1β,and tumor necrosis factor-α,which were accompanied by up-regulated interleukin-10,mRNA expres-sion of ZO-1,and growth performance(P<0.05).Moreover,OA could down-regulate the mRNA expression of TLR4 and MyD88 to inhibit the NF-κB signaling pathway(P<0.05).Additionally,HSD stress significantly decreased the abundance of Bacteroidetes and disturbed the balance of microbial ecosystems,whereas OA significantly increased the abundance of Bacteroidetes and restored the disordered gut microbiota by reducing competitive and exploita-tive interactions in microbial communities(P<0.05).Meanwhile,OA significantly increased the content of acetic and butyric acids,which showed significant correlations with intestinal inflammation indicators(P<0.05).Conclusions:Dietary OA ameliorated intestinal inflammation and growth performance of broilers through restor-ing the disordered gut microbial compositions and interactions induced by HSD and elevating short-chain fatty acid production to inhibit the TLR4/NF-κB signaling pathway.These findings demonstrated the critical role of intestinal microbiota in mediating the HSD-induced inflammatory responses,contributing to exploring nutritional strategies to alleviate HSD-induced stress in animals. 展开更多
关键词 Broiler High stocking density Intestinal inflammation Intestinal microbiota Organic acid Short-chain fatty acid
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Effects of dietary tryptophan and stocking density on the performance,meat quality,and metabolic status of broilers 认领 引用 被引量：11
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作者 Bo Wang Zhizhi Min +2 位作者 Jianmin Yuan Bingkun Zhang Yuming Guo 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2015年第1期90-96,共7页
Background： Highly automated cage-rearing systems are becoming increasingly popular in China. However, a high stocking density can cause oxidative stress and decrease broiler performance. The tryptophan （TRP） deriv... Background： Highly automated cage-rearing systems are becoming increasingly popular in China. However, a high stocking density can cause oxidative stress and decrease broiler performance. The tryptophan （TRP） derivative 5-hydroxytryptophan （5-HT） has been shown to preserve membrane fluidity in birds suffering from oxidative stress Therefore, this experiment was conducted to determine the effects of dietan/TRP supplementation on performance, breast meat quality and oxidative stress in broilers reared in cages with a high or low stocking density. Methods： Female Arbor Acres broilers （25-d-old, n = 144） were randomly allocated to 1 of 4 treatments. The birds were fed a diet based on corn, soybean meal, cottonseed meal and corn gluten meal containing either 0.18 or 0.27% TRP and were housed with stocking densities of 11 or 15.4 birds/m2 in a 2 x 2 factorial experiment. Broiler performance was evaluated from d 25 to 42. Eight birds from each treatment were slaughtered on d 42 and plasma and breast muscle samples were collected to measure biochemical indices. Results： A higher stocking density tended to be associated with reduced weight gain （P 〈 0.10）, and significantly increased plasma glutamic-pyruvic transaminase （GPT） activity （P 〈 0.001）. Increased dietary TRP significantly reduced the activities of lactic dehydrogenase and GPT while increasing total cholesterol in the plasma （P 〈 0.01）, reducing drip loss of breast muscle （P 〈 0.10） and improving feed efficiency （P 〈 0.10）. Conclusions： An increase in dietary TRP, ].S-fold higher than the standard supplementation level, can alleviate oxidative stress as well as improve welfare and feed efficiency in broilers reared in cages with a high stocking density. 展开更多
关键词 Broiler Meat quality Performance Stocking density Tryptophan
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Effects of stocking density on the growth and immunity of Atlantic salmon salmo salar reared in recirculating aquaculture system(RAS) 认领 引用 被引量：4
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作者 WANG Yanfeng CHI Liang +5 位作者 LIU Qinghua XIAO Yongshuang MA Daoyuan XIAO Zhizhong XU Shihong LI Jun 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2019年第1期350-360,共11页
Atlantic salmon reared in recirculating aquaculture system(RAS) may lead to inappropriately high stocking density, because ?sh live in a limited space. Finding the suitable stocking density of Atlantic salmon reared i... Atlantic salmon reared in recirculating aquaculture system(RAS) may lead to inappropriately high stocking density, because ?sh live in a limited space. Finding the suitable stocking density of Atlantic salmon reared in RAS is very important for RAS industry. In this paper, the in?uence of stocking density on growth and some stress related physiological factors were investigated to evaluate the ef fects of stocking density. The ?sh were reared for 220 days at ?ve densities(A: 24 kg/m^3; B: 21 kg/m^3; C: 15 kg/m^3; D: 9 kg/m^3 and E: 6 kg/m^3). The results show that 30 kg/m^3 might be the maximum density which RAS can af ford in China. The stocking densities under 30 kg/m^3 have no ef fect on mortality of Atlantic salmon reared in RAS. However, the speci?c growth rate(SGR), ?nal weight and weight gain in the high density group were signi?cantly lower than the lower density groups and middle density groups. Moreover, feed conversion rate(FCR) had a negative correlation with density. Plasma hormone T_3 and GH showed signi?cant decrease with the increase of the stocking density of the experiment. Furthermore, thyroid hormone(T 3), GH(growth hormone) activities were decreased with stocking density increase. However, plasma cortisol, GOT(glutamic oxalacetic transaminase) and GPT(glutamic pyruvic transaminase) activities were increase with stocking density increase. And the stocking density has no ef fects on plasma lysozyme of Atlantic salmon reared in RAS. These investigations would also help devise effcient ways to rear adult Atlantic salmon in China and may, in a way, help spread salmon mariculture in China. 展开更多
关键词 stocking density growth physiological parameters Atlantic salmon RAS
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Influence of stocking density on growth, body composition and energy budget of Atlantic salmon Salmo salar L. in recirculating aquaculture systems 认领 引用 被引量：6
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作者 刘宝良 刘鹰 +3 位作者 刘子毅 仇登高 孙国祥 李贤 《Chinese Journal of Oceanology and Limnology》 CSCD 2014年第5期982-990,共9页
Atlantic salmon Salmo salar were reared at four stocking densities--high density D1 （final density -39 kg/m^3）, medium densities DE （-29 kg/m^3） and D3 （~19 kg/m^3）, and low density D4 （-12 kg/m^3）- for 40 day... Atlantic salmon Salmo salar were reared at four stocking densities--high density D1 （final density -39 kg/m^3）, medium densities DE （-29 kg/m^3） and D3 （~19 kg/m^3）, and low density D4 （-12 kg/m^3）- for 40 days to investigate the effect of stocking density on their growth performance, body composition and energy budgets. Stocking density did not significantly affect specific growth rate in terms of weight （SGRw） but did affect specific growth rate in terms of energy （SGRe）. Stocking density significantly influenced the ration level （RLw and RLe）, feed conversion ratio （FCRw and FCRe） and apparent digestibility rate （ADR）. Ration level and FCRw tended to increase with increasing density. Fish at the highest density D~ and lowest density D4 showed lower FCRe and higher ADR than at medium densities. Stocking density significantly affected protein and energy contents of the body but did not affect its moisture, lipid, or ash contents. The expenditure of energy for metabolism in the low-density and high-density groups was lower than that in the medium-density groups. Stocking density affected energy utilization from the feces but had no effect on excretion rate. The greater energy allocation to growth at high density and low density may be attributed to reduced metabolic rate and increased apparent digestibility rate. These findings provide information that will assist selection of suitable stocking densities in the Atlantic-salmon-farming industry. 展开更多
关键词 stocking density Atlantic salmon growth body composition energy budget recirculatingaquaculture system
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Stocking density affects the growth performance and metabolism of Amur sturgeon by regulating expression of genes in the GH/IGF axis 认领 引用 被引量：7
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作者 REN Yuanyuan WEN Haishen +1 位作者 LI Yun LI Jifang 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2018年第3期956-972,共17页
The effects of stocking density on the growth and metabolism of Amur sturgeon were assessed. Amur sturgeon were grown for 70 days at three dif ferent stocking densities(low stocking density, LSD: 5.5 kg/m^3; medium st... The effects of stocking density on the growth and metabolism of Amur sturgeon were assessed. Amur sturgeon were grown for 70 days at three dif ferent stocking densities(low stocking density, LSD: 5.5 kg/m^3; medium stocking density, MSD: 8.0 kg/m^3; and high stocking density, HSD: 11.0 kg/m^3), and the biometric index, muscle composition, and serum biochemical parameters were evaluated. In addition, pituitary, liver, and muscle samples were collected for gene cloning and expression analyses. After 70 days of growth, the fish maintained at HSD had significantly lower fi nal body weight and specifi c growth rate, and a higher feed conversion ratio than those of the fish in the MSD and LSD groups. The HSD group had the lowest lipid and protein concentrations in serum and muscle. The serum cortisol concentration increased significantly in the HSD group, indicating that the stress-response system was activated in these fish. There was no change in the concentration of serum insulin-like growth factor 2(IGF-2), while the concentrations of serum growth hormone(GH) and insulin-like growth factor 1(IGF-1) decreased in the HSD group. The full-length cDNAs of G H and IGF-2 genes(995-bp and 1 207-bp long, respectively), were cloned and analyzed. In the HSD group, the expressions of GH in the pituitary and growth hormone receptor( GHR) and IGF-1 in the liver were down-regulated at the end of the 70-day experiment. In the HSD group, the transcript level of IGF-2 significantly decreased in the liver, but did not change in muscle. Overall, our results indicated that a HSD negatively af fects the growth performance and leads to changes in lipid and protein metabolism in Amur sturgeon. The down-regulated expression of genes related to the GH/IGF axis may be responsible for the poor growth performance of Amur sturgeon under crowding stress. 展开更多
关键词 Amur sturgeon stocking density growth metabolism growth hormone （GH） insulin-like growth factor（IGF） axis
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Turbot Scophthalmus maximus: stocking density on growth, pigmentation and feed conversion 认领 引用 被引量：6
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作者 马爱军 陈超 +3 位作者 雷霁霖 陈四清 庄志猛 王印庚 《Chinese Journal of Oceanology and Limnology》 2006年第3期307-312,共6页
Juvenile turbot （Scophthalmus maximus） the initial stock densities at 0.28, 0.87, 1.12, 1.16, 2.75 were reared in five different experiment groups in kg/m^2 respectively for the study of the density effect on growth... Juvenile turbot （Scophthalmus maximus） the initial stock densities at 0.28, 0.87, 1.12, 1.16, 2.75 were reared in five different experiment groups in kg/m^2 respectively for the study of the density effect on growth, pigmentation and feed coefficient rate. The experiment lasted for 60 days with final stock densities at 1.91, 6.31, 8.86, 11.97, 17.67 kg/m^2 respectively. Result showed that, in the same experiment condition, the stocking density has a positive effect on growth in low density and negative in high density. The SGR （special growth rate） was 3.189, 3.304, 3.447, 3.341, and 3.087 respectively. The uniformity of weight distributing among experiment groups decreased with increasing density. The stocking density had positive effect on feed coefficient rate. Group 1 had the least feed coefficient rate 0.96, and highest at 1.25 in Group 5, the highest density group. High stocking density inhibited the growth and increased the feed coefficient rate. The stocking density had negative relationship to pigmentation improvement for whitened fish. 展开更多
关键词 turbot （Scophthalmus maximus） stocking density growth feed coefficient pigmentation improvement
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Effect of stocking density on performances of juvenile turbot(Scophthalmus maximus)in recirculating aquaculture systems 认领 引用 被引量：7
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作者 LI Xian LIU Ying Jean-Paul BLANCHETON 《Chinese Journal of Oceanology and Limnology》 CSCD 2013年第3期514-522,共9页
Limited information has been available about the influence of loading density on the performances of Scophthalmus maximus,especially in recirculating aquaculture systems(RAS).In this study,turbot(13.84±2.74 g;ave... Limited information has been available about the influence of loading density on the performances of Scophthalmus maximus,especially in recirculating aquaculture systems(RAS).In this study,turbot(13.84±2.74 g;average weigh±SD)were reared at four different initial densities(low 0.66,medium 1.26,sub-high 2.56,high 4.00 kg/m^2)for 10 weeks in RAS at 23±1℃Final densities were 4.67,7.25,14.16,and 17.47 kg/m^2,respectively,which translate to 82,108,214,and 282 percent coverage of the tank bottom.Density had both negative and independent impacts on growth.The final mean weight,specific growth rate(SGR),and voluntary feed intake significantly decreased and the coefficient of variation(CV)of final body weight increased with increase in stocking density.The medium and sub-high density groups did not differ significantly in SGR,mean weight,CV,food conversion rate(FCR),feed intake,blood parameters,and digestive enzymes.The protease activities of the digestive tract at pH 7,8.5,9,and 10 were significantly higher for the highest density group,but tended to be lower(not significantly)at pH 4 and 8.5 for the lowest density group.The intensity of protease activity was inversely related to feed intake at the different densities.Catalase activity was higher(but not significantly)at the highest density,perhaps because high density started to induce an oxidative effect in turbot.In conclusion,turbot can be cultured in RAS at a density of less than 17.47 kg/m^2.With good water quality and no feed limitation,initial density between 1.26 and 2.56 kg/m^2(final:7.25 and 14.16 kg/m^2)would not negatively affect the turbot cultured in RAS.For culture at higher density,multi-level feeding devices are suggested to ease feeding competition. 展开更多
关键词 turbot stocking density growth protease activity
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Permanence and global attractivity of stage-structured predator-prey model with continuous harvesting on predator and impulsive stocking on prey 认领 引用 被引量：2
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作者 焦建军 陈兰荪 +1 位作者 Juan J.Nieto Torres Angela 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2008年第5期653-663,共11页
We investigate a stage-structured delayed predator-prey model with impulsive stocking on prey and continuous harvesting on predator. According to the fact of biological resource management, we improve the assumption o... We investigate a stage-structured delayed predator-prey model with impulsive stocking on prey and continuous harvesting on predator. According to the fact of biological resource management, we improve the assumption of a predator-prey model with stage structure for predator population that each individual predator has the same ability to capture prey. It is assumed that the immature and mature individuals of the predator population are divided by a fixed age, and immature predator population does not have the ability to attach prey. Sufficient conditions are obtained, which guarantee the global attractivity of predator-extinction periodic solution and the permanence of the system. Our results show that the behavior of impulsive stocking on prey plays an important role for the permanence of the system, and provide tactical basis for the biological resource management. Numerical analysis is presented to illuminate the dynamics of the system. 展开更多
关键词 stage-structured, impulsive stocking continuous harvesting global attractivity permanence
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Effects of Temperature,Salinity and Stocking Density on Larval Survival and Growth of Reciprocal Crosses Between Two Strains of Pacific Oysters,Crassostrea gigas 认领 引用 被引量：2
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作者 MENG Lingxin XU Chengxun LI Qi 《Journal of Ocean University of China》 SCIE CAS CSCD 2022年第4期1017-1026,共10页
The Pacific oyster Crassostrea gigas is one of the most widely cultivated aquaculture species and contributes signifi-cantly to total seafood production for human beings.However,mass mortality occurred frequently,and ... The Pacific oyster Crassostrea gigas is one of the most widely cultivated aquaculture species and contributes signifi-cantly to total seafood production for human beings.However,mass mortality occurred frequently,and in some regions almost all oysters died during seed production and grow-out stage.In order to explore whether hybridization breeding can improve its growth and survival,a complete diallel cross between a selected strain‘Haida No.1’(S)and an orange shell variant(O)of C.gigas was carried out.The larval growth and survival were compared among hybrids and purebred strains at temperatures of 16,20,24,28 and 32℃;salinities of 15,20,25,30 and 35;and stocking densities of 0.5,1,2,4 and 8 larvae mL−1.Under different environments,the hybridization between two strains of C.gigas showed the heterosis of growth and survival.The mean shell height and survival rate of the two reciprocal crosses(OS,SO)were significantly higher than those of the two purebred strains(SS,OO)under all environ-mental conditions.In particular,OS showed greater heterosis than the purebred strains and SO progeny.The results showed that the productive traits of the‘Haida No.1’could be improved by crossing with the orange shell line.Meanwhile,the results from this study also indicated that hybridization between the two strains of C.gigas may be a promising way for breeding new variety with high survival rate. 展开更多
关键词 Crassostrea gigas heterosis larvae temperature salinity stocking density survival growth
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Effects of feeding and stocking density on digestion of cultured Atlantic salmon Salmo salar L. 认领 引用 被引量：1
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作者 孙国祥 郑纪盟 +1 位作者 刘宝良 刘鹰 《Chinese Journal of Oceanology and Limnology》 CSCD 2014年第6期1320-1328,共9页
The combined effects of feeding rate(0.8%,1.0%,and 1.2%initial body weight/day),feeding frequency(two,three,and four times/day) and stocking density(10,15,and 20 kg/m3) in recirculating aquaculture systems(RAS) on gro... The combined effects of feeding rate(0.8%,1.0%,and 1.2%initial body weight/day),feeding frequency(two,three,and four times/day) and stocking density(10,15,and 20 kg/m3) in recirculating aquaculture systems(RAS) on growth performance,digestion and waste generation of Atlantic salmon(Salmo salar L.) were investigated in an 8-week orthogonal experiment(L9(3)3) with a constant daily water renewal at 7.50%of total volume.No mortality occurred during the experimental period.Feed conversion ratio(FCR) varied from 0.90 to 1.13 and specific growth rate(SGR) ranged from 0.48%to 0.69%/day.SGR,thermal growth coefficient(TGC) and FCR were not significantly(P>0.05) affected by the three factors,while net protein utilization(NPU) was significantly(P<0.05) affected.Apparent digestibility coefficients(ADC) of dry matter in the present study were in the range 66.12%-73.55%.ADC in protein,lipid and energy were statistically different among all treatments and in the range of 90.07%-93.67%,81.54%-89.15%,and67.55%-71.87%,respectively.The proportion of mean total ammonia nitrogen excreted ranged from 1.37%to 1.64%of feed nitrogen at steady state,and the concentration of nitrogenous and phosphorus compounds were differently correlated to the three factors.The results will provide valuable reference data for culture management decisions in the Atlantic salmon farming industry. 展开更多
关键词 Atlantic salmon Salmo salar L. aquaculture feeding strategy stocking density growth digestion
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Stocking density effects on growth and stress response of juvenile turbot(Scophthalmus maximus) reared in land-based recirculating aquaculture system 认领 引用 被引量：2
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作者 LIU Baoliang JIA Rui +3 位作者 ZHAO Kuifeng WANG Guowen LEI Jilin HUANG Bin 《Acta Oceanologica Sinica》 SCIE CAS CSCD 2017年第10期31-38,共8页
Stocking density is widely recognized as a critical factor in aquaculture and a potential source of long-term stress.The influence of stocking density on growth and stress response of juvenile turbot（Scophthalmus max... Stocking density is widely recognized as a critical factor in aquaculture and a potential source of long-term stress.The influence of stocking density on growth and stress response of juvenile turbot（Scophthalmus maximus, ~3–75g, initial to final weight） was examined in fish held under low（LD, ~0.21–5.31 kg/m^2, initial to final density）,medium（MD, ~0.42–10.81 kg/m^2） and high stocking density（HD, ~0.63–14.27 kg/m^2） for 120 days in a recirculating aquaculture system（RAS）. In this trial, the growth curve for weight of juvenile turbot in RAS, all fitted by the Schnute model. No significant difference was found in growth performance among the three densities until at the final sampling（Day 120）. The final weight and body weight increase（BWI） in the HD group were significantly lower than in other groups（P〈0.05, weight：（75.83±2.49） g,（75.39±2.08） g,（65.72±2.86） g and BWI：（2 436.12±28.10）%,（2 421.29±4.64）%,（2 097.88±20.99）% in LD, MD and HD groups, respectively）. Similarly, the specific growth rate（SGR）, feed conversion ratio（FCR） and coefficient of variation for weight（CV_w） were adversely affected by high stocking density（P〈0.05）. However, there was no difference in survival and Fulton＇s condition factor（K） of turbot among the different groups. Physiological analyses demonstrated a clear increase in the plasma cortisol level and an obvious decrease in growth hormone（GH） concentration in the HD group on Day120（P〈0.05）. There was no significant effect of stocking density on plasma glucose, Cl– and protein levels. All these findings would provide a reference for selecting the optimal stocking density of juvenile turbot in RAS. 展开更多
关键词 growth performance recirculating aquaculture system Scophthalmus maximus stress physiology stocking density
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Effects of osmotic pressure, temperature and stocking density on survival and sexual reproduction of Craspedacusta sowerbii 认领 引用
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作者 Yuan-Wei ZHANG Xiao-Fu PAN +3 位作者 Xiao-Ai WANG Wan-Sheng JIANG Qian LIU Jun-Xing YANG 《Zoological Research》 SCIE CSCD 2016年第2期90-95,共6页
The effects of osmotic pressure, temperature and stocking density on medusae survival of Craspedacusta sowerbii were examined. The medusae were shown to be sensitive to the variations of osmotic pressure. And the surv... The effects of osmotic pressure, temperature and stocking density on medusae survival of Craspedacusta sowerbii were examined. The medusae were shown to be sensitive to the variations of osmotic pressure. And the survival time was 〈90 h at 34 mOsm/L and it declined rapidly with rising osmotic pressure. The peak survival time of 〉200 h was recorded at 0.2 mOsm/L. Comparing with 27℃ and 32 ℃ treatments, 23 ℃ treatment yielded lower activities at a range of 8-13/min. However, there was a longer survival time. A non-linear relationship existed between survival time and stocking density. Lower density resulted in larger body size. And sexual reproduction resumed after breeding for 〉22 days. Newly-formed polyps and medusae appeared subsequently but only in the higher-density groups of 10, 14 and 18 ind./L. It suggested that the number of newly-formed polyps and medusae was highly dependent on stocking density. That is, a higher stocking density produced more organisms. However, newly-formed medusae died within one month and none grew a diameter of 〉5 mm. 展开更多
关键词 Craspedacusta sowerbfi Osmotic pressure Temperature Stocking density
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Effect of Alum-Amended Litter and Stocking Density on Ammonia Release and Footpad and Hock Dermatitis of Broilers 认领 引用
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作者 ZHANG Hong-fang JIAO Hong-chao +1 位作者 SONG Zhi-gang LIN Hai 《Agricultural Sciences in China》 CSCD 2011年第5期777-785,共9页
Two experiments were conducted to evaluate the effect of alum on ammonia emission,live performance,and health of broilers.In experiment 1,the effect of alum(0,2,and 4%)supplementation on the emission of ammonia was me... Two experiments were conducted to evaluate the effect of alum on ammonia emission,live performance,and health of broilers.In experiment 1,the effect of alum(0,2,and 4%)supplementation on the emission of ammonia was measured.The effects of alum-treated litter and stocking density(12,16,and 20 birds m-2)on the live performance and incidence of footpad and hock dermatitis were investigated in experiment 2.Alum supplementation in chicken excreta significantly decreased pH from 8.06 to 5.27 and 3.62 by 2 and 4%alum treatments,respectively.Ammonia emission rate was reduced 73.0 and 75.8%by 2 and 4%alum treatments,respectively.The suppressed litter urease activity was detected in 4%alum treatment.Alum-amended litter(1 kg m-2)decreased atmosphere ammonia concentrations by 30%in broiler house.Alum-amended litter maintained a lower pH until 35 d of age.Body weight(BW)gain was decreased by alum treatment in the period of 4-7 wk of age.Higher stocking density(20 birds m-2)increased BW gain in the first 3 wk of age but decreased BW gain during the period of 4-7 wk of age.Neither alum nor stocking density treatments had a significant effect on feed intake and feed efficiency.Alum-treated litter had no detrimental effect on the development of footpad and hock burns.In contrast,high stocking density(20 bird m-2)increased the incidence of footpad and hock lesion.The result suggests that the decreased litter pH and suppressed bacterial urease activity by alum treatment is responsible for the decreased ammonia emission.At high stocking density,the increased litter moisture content should be responsible,at least partially,for the development of footpad and hock lesions. 展开更多
关键词 ammonia stocking density litter alum broilers
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Comparative Study on Various Methods of Pressure in Compression Stockings 认领 引用
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作者 LI Jiecong KE Sicheng XIE Hong 《Journal of Donghua University(English Edition)》 CAS 2019年第1期52-61,共10页
A series of self-designed and woven compression stockings were used in this pressure comparison experiment. In order to compare the differences of the garment pressure values exerted by the compression stockings with ... A series of self-designed and woven compression stockings were used in this pressure comparison experiment. In order to compare the differences of the garment pressure values exerted by the compression stockings with different structure parameters among three methods. The experiments were carried out with Flexi force sensors. The pressure value of nine pairs of compression stockings on five subjects and the model leg was collected, and the tensile force of the every section of these stockings was collected to calculate the pressure according to Laplace's equation. The data analysis results show that the pressure values of the compression stockings obtained by comparing the three methods have great differences in various testing methods. There is a significant correlation between processing parameters and stitch density(SD). The pressure design of the compression stockings should be based on the actual wearing of the pressure. 展开更多
关键词 compression stocking pressure study cylinder parametr(CP) elastic motor parrametor(EMP)
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Optimization of Stocking Density for the Sea Cucumber, Apostichopus japonicus Selenka, Under Feed-Supplement and Non-Feed-Supplement Regimes in Pond Culture 认领 引用 被引量：10
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作者 QIN Chuanxin DONG Shuanglin +4 位作者 TAN Fuyi TIAN Xiangli WANG Fang DONG Yunwei GAO Qinfeng 《Journal of Ocean University of China》 CAS 2009年第3期296-302,共7页
Optimal stocking densities were investigated for the sea cucumber Apostichopusjaponicus Selenka under feed-supplement and non-feed-supplement regimes in net enclosures for 333 d. Substantial weight loss occurred durin... Optimal stocking densities were investigated for the sea cucumber Apostichopusjaponicus Selenka under feed-supplement and non-feed-supplement regimes in net enclosures for 333 d. Substantial weight loss occurred during the aestivation phase （AE）. Decreased growth rates were also observed during the winter phase （WT）. In contrast, sea cucumbers showed rapid growth during the spring （SP） and autumn （AU） phases. Feeding regimes considerably influenced the growtb performance, i.e., sea cucumbers grew faster under feed-supplement regime than under non-feed-supplement regime （P 〈 0.05）. The average survival rates of sea cucumbers under feed-supplement regime were higher than those under non-feed-supplement regime for both the autumn phase and spring phase, but the differences were only significant for the latter phase （P〈 0.05）. The fitted B-N curves showed that the optimal stocking densities, in terms of net production, were 22.3 ind. m^-2 for feed-supplement regime and 14.1 ind. m^-2 for non-feed-supplement regime. 展开更多
关键词 sea cucumber Apostichopusjaponicus stocking density feed-supplement non-feed-supplement yield
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STUDY ON RELATIONSHIPS AMONG SEEDLING QUALITY AND SURVIVAL RATE, STOCKING PERCENTAGE AND GROWTH 认领 引用
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作者 赵春梅 王庆成 陈祥伟 《Journal of Northeast Forestry University》 1994年第2期37-45,共9页
Effects of various seedling classes and root cutting treatments on the survival rate, stocking Percentage and the growth of height and collar diameter in young stands of korean pine (Pinus koraiensis), mongolian scots... Effects of various seedling classes and root cutting treatments on the survival rate, stocking Percentage and the growth of height and collar diameter in young stands of korean pine (Pinus koraiensis), mongolian scots pine (Pin us sylvestris var.mangolica),Dahurian larch (Larix gmelini), korean spruce (Picea koraiensis), anur cork tree(Phellodendron amurensis). manchurian ash (Fradinus mandshurica) and anur linden (Tilia amurensis) were studied in this paper. The results show that the survival rate, stocking Percentage and the growth of height and collar diameter of the I class seedlings are better than that of the n and III classes seedlings. so it is very important to select I class seedlings for increasing the quality of afforestation. 展开更多
关键词 Seeding classification Survival rate Stocking Percentage
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