Aquatic Science and Technology最新文献_第2页

Effect of Different Salinity Concentrations on the Chemical analysis and Time Appearance of Feces for Cyprinus Carpio 不同盐度浓度对鲤粪便化学分析及时间形态的影响

Aquatic Science and Technology Pub Date : 2019-04-22 DOI: 10.5296/AST.V7I2.14539

H. Hilali, M. S. Al-Khshali

{"title":"Effect of Different Salinity Concentrations on the Chemical analysis and Time Appearance of Feces for Cyprinus Carpio","authors":"H. Hilali, M. S. Al-Khshali","doi":"10.5296/AST.V7I2.14539","DOIUrl":"https://doi.org/10.5296/AST.V7I2.14539","url":null,"abstract":"The present study was conducted to investigate the effect of high salinity on some stress parameters of common carp (Cyprinus carpio), which gradually exposed to salt concentrations of 5, 10 and 15g/liter, as well as tap water (water without chlorine) (control 0.1g/liter) for 90 days. Eighty fish were randomly distributed on eight glass tanks with 2 replicates, 10 fish / replicate at average weight of 15 ± 3 g, to study the effect of salinity on the time appearance of feces and, the chemical analysis of the body composition .The results showed that the appearance time of feces was decreased with the rise of salt concentrations of common carp. As the passage of food through digestive tract took less time in high salinities. and the appearance of feces was after 4.16 hours of feed intake in a salt concentration of 15 g/liter, whereas it started after 5.22 hours in a saline concentration of 10 g/l and after 6.11 in a salt concentration of 5g/l in comparison with the control treatment (6.17 hours). Regarding the chemical analysis of the body composition, it was found that the moisture dropped with the rise of salinity, as it mounted to 77.09, 74.94 and 73.80% in the salt concentrations 5,10 and 15 g/l respectively, in comparison with the control treatment (78.45%).The percentage of protein decreased to 14.19, 13.89 and 13.74% in the salt concentrations 5, 10 and 15 g/l respectively, in comparison with the control treatment (14.28%).The percentage of fat amounted to 5.71, 5.68, and 5.66% in the salt concentrations 5,10 and 15 g/l respectively, in comparison with the control treatment (5.73%). whereas the percentage of ash was increased to 3.01, 5.40 and 6.80% with the increase in salinity to 5,10 and 15 g/l respectively ,compared with the control treatment (1.80%).","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129568740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Temperature Resistant Extracts Prepared from the Perinereis aibuhitensis and Its Antioxidative Characterization 一种耐温提取物及其抗氧化性能的研究

Aquatic Science and Technology Pub Date : 2019-04-16 DOI: 10.5296/AST.V7I2.14673

Xuanjin Wu, Zhongzheng Zhou, Wei Wu, Yang Li, Kong Ming, Chen Xiguang

{"title":"A Temperature Resistant Extracts Prepared from the Perinereis aibuhitensis and Its Antioxidative Characterization","authors":"Xuanjin Wu, Zhongzheng Zhou, Wei Wu, Yang Li, Kong Ming, Chen Xiguang","doi":"10.5296/AST.V7I2.14673","DOIUrl":"https://doi.org/10.5296/AST.V7I2.14673","url":null,"abstract":"The Perinereis aibuhitensis (P. aibuhitensis), a traditional Chinese medicine, has a function of delaying senilityaccording to “Compendium of Materia Medica”. It is considered a useful animal model in antioxidant activity tests. The P. aibuhitensis has already been utilized as biochemical responses to speciﬁc pollutants and the food supply for various birds. In the present work, the extracts from P. aibuhitensis were prepared by the traditional decocting method and the biocompatibility was characterized by hemolysis and MTT tests. The materials showed no hemolytic for the hemolysis rate (lower than 0.2 %) while exhibited moderate cytotoxic effects on HUVECs (Human Umbilical Vein Endothelial Cells). In extracellular antioxidant activity against O2¯ and ·OH, the extracts from P. aibuhitensis could eliminate O2¯ and ·OH efficiently. In cellular ROS level tests, the ROS level was reduced effectively after treated with P. aibuhitensis extracts. The extracts had a potential prospect as a biological antioxidant to reduce redundant reactive oxygen species damage and great signiﬁcance for humans health.","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125256906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hormonal Regulation of Fish Adaptation to Atypical Fluctuations in Temperature and Oxygen Regime of a Water Body 鱼类对非典型水体温度和氧状态波动的适应的激素调节

Aquatic Science and Technology Pub Date : 2019-03-31 DOI: 10.5296/AST.V7I2.14444

O. Potrokhov, O. Zinkovskyi, M. Prychepa, Y. Khudiiash

{"title":"Hormonal Regulation of Fish Adaptation to Atypical Fluctuations in Temperature and Oxygen Regime of a Water Body","authors":"O. Potrokhov, O. Zinkovskyi, M. Prychepa, Y. Khudiiash","doi":"10.5296/AST.V7I2.14444","DOIUrl":"https://doi.org/10.5296/AST.V7I2.14444","url":null,"abstract":"Recently, the water temperature significantly exceeded the climatic norms for the studied region of Ukraine. Water is heated to 30ºC with a decrease in the concentration of dissolved oxygen in shallow water. In this connection, the change in the hormone content in the blood plasma of carp, roach, rudd, perch and ruff in response to these factors has been studied. Most of the fish species studied in June respond by increasing the cortisol content in the blood by 1.2–3.3 times to an increase in water temperature. Fish quite successfully adapts after a month's stay in conditions of high water temperature to 31ºC, and the level of cortisol is reduced. The content of thyroid hormones in the blood of the rudd, roach and ruff is quite high and after a month of adaptation to the existing factors. This indicates an increased activity in their metabolic processes. The content of somatotropin and prolactin in the blood of the studied fish species decreases 2.4–5.0 and 1.9–7.7 times, respectively, in response to an increase in temperature and a decrease in the oxygen concentration in water. This should lead to a decrease in the rate of fish growth and change in the activity of osmotic exchange. However, hormonal reactions are species-specific in nature to the existing factors. Perch and roach are less plastic to increase water temperature. Carp most favorably tolerates an increase in water temperature and a decrease in oxygen concentration.","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116572746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Reviewer Acknowledgements 审核人确认

Aquatic Science and Technology Pub Date : 2019-03-26 DOI: 10.5296/ast.v7i1.14567

Maggie Liu

引用次数: 0

Evaluation of the Effects of Different Inclusion Rates of Balanites aegyptiaca Seed Oil on the Growth Performance and Survival of Clarias anguillaris Fries 埃及巴兰籽油不同包合率对鳗鲡生长性能和成活率的影响

Aquatic Science and Technology Pub Date : 2019-03-18 DOI: 10.5296/AST.V7I1.14519

Mariama Sagne, J. Fall, Abdoulaye Loum, I. Thiaw, Diegane Ndong, M. Diouf, D. Sow

{"title":"Evaluation of the Effects of Different Inclusion Rates of Balanites aegyptiaca Seed Oil on the Growth Performance and Survival of Clarias anguillaris Fries","authors":"Mariama Sagne, J. Fall, Abdoulaye Loum, I. Thiaw, Diegane Ndong, M. Diouf, D. Sow","doi":"10.5296/AST.V7I1.14519","DOIUrl":"https://doi.org/10.5296/AST.V7I1.14519","url":null,"abstract":"One of the main problems facing aquaculture is the lack and high price of fishmeal and fish oil supply. The continued growth of aquaculture production cannot depend on these finite fisheries resources. It is imperative that inexpensive and readily available alternatives that do not compromise fish growth and product quality are found. It is in this specific context that this study consisting of a test of the Balanites aegyptiaca seed oil incorporated in the feed of Clarias anguillaris fries was conducted.The experiment lasted eight (8) weeks and included five treatments of two tanks each. This corresponds to a total of 10 tanks for 150 fries with a stocking density of 15 fish per tank. Five diets supplemented with 0% (R.0), 1% (R.1), 2% (R.2), 3% (R.3) and 4% (R.4) of the lipid source were administered twice daily for eight weeks. Growth was regularly monitored and mortalities recorded to assess the effects of each diet. The results revealed significant effects on growth performance and survival of Clarias anguillaris fries. For the average weight gain and the specific growth rate, the best result was obtained with the fish fed with diet containing 2% Balanites aegyptiaca seed oil (R.2). The best feed conversion ratio was recorded with the diet incorporating 2% of this oil. The best survival rates (66.67% and 70%) were observed in fries fed with diets incorporating respectively 2% and 3% of the oil. The experimental study has shown that a 2% incorporation rate is the most appropriate for the successful rearing of Clarias anguillaris fries.","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133751507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Relationship Between Digital Egg Coloration and Egg Survival in Landlocked Fall Chinook 内陆秋季奇努克雀卵数字化着色与卵存活率的关系

Aquatic Science and Technology Pub Date : 2018-12-11 DOI: 10.5296/AST.V7I1.14047

Holiday Robley, M. E. Barnes

{"title":"The Relationship Between Digital Egg Coloration and Egg Survival in Landlocked Fall Chinook","authors":"Holiday Robley, M. E. Barnes","doi":"10.5296/AST.V7I1.14047","DOIUrl":"https://doi.org/10.5296/AST.V7I1.14047","url":null,"abstract":"Digital color values were collected from the eggs of 128 spawns from individual landlocked fall Chinook salmon Oncorhynchus tshawytscha females from Lake Oahe, South Dakota, USA, in 2008, 2009, 2015 and 2016. For all spawns, the mean (SE) a* value, a measure of red-green chromaticness, was 10.99 (0.27), and ranged from 3.98 to 18.71. Mean (SE) b* (yellow-green) was 20.27 (0.32), and ranged from 9.28 to 28.50. Mean (SE) L* (white-black) was 20.73 (0.48), and ranged from 3.98 to 18.71. Egg total color index also showed considerable variation, with a mean (SE) of 23.05 (0.37) and range from 11.70 to 31.64. Egg survival to the eyed-stage was weakly, but significantly, correlated to b* (r = 0.206), L* (r = 0.185), Chroma (r = 0.211), and Entire Color Index (r = 0.211). Spawns with no egg survival had eggs with significantly lower a* values compared to spawns where at least some of the eggs survived to the eyed stage. L*, a*, b*, Chroma, and Entire Color Index varied significantly among the years, but Hue and egg survival to the eyed stage did not. The results of this study indicate a possible link between egg color and landlocked fall Chinook salmon egg survival, possibly due to differences in the diets of feral broodstock females or their ability to deposit bodily carotenoids in the developing eggs.","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134192646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Micralestes eburneensis Daget 1965 (Characiformes: Alestidae), a Near Threatened Fishes of the World 世界近危鱼类之一的小鲵(特征:小鲵科)

Aquatic Science and Technology Pub Date : 2018-11-21 DOI: 10.5296/AST.V7I1.13943

R. J. O. Doffou, F. Konan, G. Aliko, C. Boussou, Y. Bony, G. Gourène

引用次数: 0

Some Spawning Performance Parameters of Cultured Nile Tilapia Oreochromis niloticus, under Brackish Water 咸淡水下尼罗罗非鱼产卵性能参数的研究

Aquatic Science and Technology Pub Date : 2018-10-21 DOI: 10.5296/AST.V7I1.13660

N. Mashaii, F. Rajabipour, M. Jafari, M. Mohammadi, H. Sarsangi, H. Hoseinzadeh, A. Matinfar

引用次数: 2

Bioaccumulation of Metals in Fish from Sarikum Lake 沙里库姆湖鱼类体内金属的生物积累

Aquatic Science and Technology Pub Date : 2018-08-30 DOI: 10.5296/AST.V7I1.13456

L. Bat, Öztekin Yardım, Ayşah Öztekn, F. Şahin

引用次数: 4

Assessment of Anthropogenic Impact of Surface Water Quality, South Africa 地表水质量的人为影响评估，南非

Aquatic Science and Technology Pub Date : 2018-06-19 DOI: 10.5296/AST.V6I2.12837

Dipitseng Manamela, O. Awofolu

{"title":"Assessment of Anthropogenic Impact of Surface Water Quality, South Africa","authors":"Dipitseng Manamela, O. Awofolu","doi":"10.5296/AST.V6I2.12837","DOIUrl":"https://doi.org/10.5296/AST.V6I2.12837","url":null,"abstract":"This article investigates the impact of anthropogenic activities on an important surface water from physico-chemical, chemical and microbial perspectives. The surface water, referred to as Blesbokspruit is in the West Rand District of South Africa. Potential impactors include wastewater treatment plant, mines, farmlands and informal settlements. Water samples were collected from nine purposively selected sampling points and analysed in 2014. The mean values of analysed variables across sampling sites and periods ranged from pH: 7.4-8.4; EC: 93.0 - 146.6 mS/m; TSS: 11.3 – 39.0 mg/L; TDS: 590.3 - 1020.3 mg/L; COD: 15.6- 34.8 mg/L. Those for anions varied from NO3-: 0.2- 2.1 (mg/L) N; PO43- : 0.4-0.9 mg/L and SO42-: 118.6 - 379.5 mg/L. The metallic variables ranged from As: 0.01-0.06 mg/L; Cd: 0.02-0.06 mg/L; Fe: 0.04-0.73 mg/L; Cu: 0.02 – 0.05 mg/L and Zn: 0.05 – 0.15 mg/L. The Faecal coliform varied from 15.9-16878.5 cfu/100 ml; Total coliform: 92.9-430294 cfu/100 ml and HPC from 4322.5-39776 cfu/1ml. Detection of toxic metals and pathogenic organisms above target safety limits indicate unsuitability of the water for domestic use with impact on the health of aquatic ecosystem. The study generally revealed the impact of anthropogenic activities on the surface water quality.","PeriodicalId":219976,"journal":{"name":"Aquatic Science and Technology","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124756787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0