scholarly journals Analysis of the death causes in sturgeon fish on a farming environment

2021 ◽  
Vol 9 (3) ◽  
pp. 160-164
Author(s):  
N. L. Hubanova ◽  
R. O. Novitskiy ◽  
A. V. Horchanok ◽  
L. A. Bajdak ◽  
N. M. Prysiazhniuk
Keyword(s):  
Water Quality ◽  
Physiological State ◽  
Acipenser Baerii ◽  
The Third ◽  
Organic World ◽  
Artificial Breeding ◽  
Fish Product ◽  
System Restoration ◽  
Loss Of Appetite ◽  
Sturgeon Fish

Artificial breeding of sturgeon fish ensures the preservation of the species as a component of the organic world system, restoration of the population and obtaining a high-quality and valuable fish product. The fact of a significant number death of Siberian (Lena) sturgeon (Acipenser baerii) raised on a farm (Dnipropetrovsk region, Ukraine) was investigated. A complex of hydrochemical, ichthyological, hydrobiological, mycological and microbiological research methods was used. It was found that due to the violation of the technological conditions for keeping sturgeon fish in the enterprise, there were changes in their behavior, peculiarities in movement, loss of appetite with the death of a significant number of fish. An increase in water temperature by two degrees, technical work nearby the pools led to a deterioration in water quality, a change in the behaviour of fish and its death. This case is an example of the lack of education in employees from enterprise, the economy of the owner’s funds: the norms for planting fish of the third and fourth years of life have been violated. No infectious diseases were found in the fish pools. As a result of this work, recommendations were made on the conditions of keeping sturgeons, maintaining the water quality at the proper level, using various types of feed and vitamins to restore the physiological state of animals and to prevent the occurrence of such situations in the future.

scholarly journals Results of the Combined Application of Various Schemes of Stimulation of Caviar Ovulation in Sterlet Producers Under Conditions of Regulated Systems

2020 ◽  
pp. 51-55
Author(s):  
Arthur Tumenov ◽  
Ahmediyar Dzhunusov ◽  
Serik Bakiyev
Keyword(s):  
Pituitary Gland ◽  
Physiological State ◽  
Biological Indicators ◽  
Acipenser Baerii ◽  
Synthetic Drugs ◽  
Combined Application ◽  
Acipenser Gueldenstaedtii ◽  
Acipenser Ruthenus ◽  
Sterlet Acipenser Ruthenus ◽  
Sturgeon Fish

The article presents the results of studies of schemes for stimulating ovulation of sturgeon caviar during rearing under conditions of regulated systems. Sturgeon (Acipenseridae) fish are characterized by high quality caviar and meat, and therefore are one of the main objects of cultivation in modern aquaculture. The achievement of sexual maturity of sturgeon fish when grown in facilities with a closed water supply cycle depends on the compliance with temperature and oxygen conditions, as well as species and the general physiological state of the fish itself. In modern aquaculture of sturgeon fish, the main species of cultivation are the following: beluga (Huso huso), Russian sturgeon (Acipenser gueldenstaedtii), Siberian sturgeon (Acipenser baerii), sterlet (Acipenser ruthenus) and their hybrids. Sterletт (Acipenser ruthenus) in comparison with other species of sturgeon fish reaches puberty at a much earlier date. The studies were carried out on the basis of LLP “Educational and Scientific Complex of Pilot Industrial Production of Aquaculture”. As it is known, pituitary injections and synthetic drugs activating the pituitary gland of sturgeons are used to stimulate producers. The study used sexually mature sterlet (Acipenser ruthenus) injected according to the combined stimulation schemes for carp pituitary gland and synthetic preparations “Surfagon”, “Nerestin-5”. To determine the effectiveness of using combined stimulation schemes for carp pituitary gland and synthetic preparations “Surfagon”, “Nerestin-5”, sterlet producers (Acipenser ruthenus) were divided into 3 groups of 20 individuals. As a result of the studies, the following fish-breeding and biological indicators of sterlet producers (Acipenser ruthenus) have been determined: weight of fish, weight of eggs obtained, as well as percentage of eggs to the total weight of fish.

Typical errors and violations of biotechnics of artificial breeding of pacific salmon

2020 ◽  
pp. 13-23
Author(s):  
Ekaterina Grinberg
Keyword(s):  
Production Process ◽  
Preventive Measures ◽  
Pacific Salmon ◽  
Fish Farming ◽  
Important Condition ◽  
The Third ◽  
Fish Breeding ◽  
Artificial Breeding ◽  
Strict Compliance

In two parts of the article, more than 70 errors and violations of the Biotechnics of artificial breeding of Pacific salmon in salmon hatcheries are collected and summarized, which lead to an immediate or delayed deterioration of the quality of reared fry and a decrease in their survival rate. Deviations from the biological basis of fish farming are shown and possible consequences of such errors or violations are predicted. In the first part of the article (#7,2020) there were General errors (throughout the entire fish-breeding process), as well as violations of Biotechnics during the work with producers, collecting eggs and preparing them for incubation, in the second part-violations of Biotechnics during the incubation of eggs, holding pre-larvae, rearing and release of young. Their correction, prevention or minimization of consequences will significantly improve the quality of sexual products and offspring from producers, increase the linear and weight gain of juveniles during rearing, improve the coefficient of feed payment, reduce the time of rearing, improve the epizootic situation by developing immunity in fry and mobilizing other protective reactions of their body, significantly reduce waste at all stages of the production process, increasing survival by 10–15%. In conclusion, it is noted that the first and most important condition for an efficient salmon hatchery is the creation of optimal environmental conditions at each stage of the production process. The second condition is strict compliance with the Biotechnics of artificial salmon breeding and the complex of veterinary and sanitary, fish-breeding and meliorative and therapeutic and preventive measures. The third is the availability of competent specialists who regularly improve their skills in accredited Universities to implement, control and manage the first two conditions.

Water quality of the Beli Lom river

1999 ◽  
Vol 39 (8) ◽  
pp. 55-62 ◽  
Author(s):  
Anastasios I. Stamou ◽  
Bogdana Koumanova ◽  
Stoyan Stoyanov ◽  
Georgy Atanasov ◽  
Konstantinos Pipilis
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Finite Difference ◽  
Treatment Plant ◽  
Quality Characteristics ◽  
Order Model ◽  
The Third ◽  
Do Concentration

A general methodology for the study of water quality in rivers is presented. The paper consists of four parts. In the first part the general characteristics of the area of study, which is the Beli Lom river, and its major pollution sources are presented. The effluent of the Razgrad Wastewater Treatment Plant (RWWTP) has been identified as the most significant pollution point source, due to the inadequate performance of the plant. The second part deals with data collection and processing. Four series of data have been collected, including physical, flow and water quality characteristics. In the third part a 1-d, finite-difference, second-order model is presented. In the fourth part, the model is calibrated, for the determination of its main coefficients, and is successfully verified by predicting the BOD and DO concentrations in the Beli Lom river for all series of data. Finally, the model has been applied to determine the maximum BOD and minimum DO effluent concentrations of the RWWTP, so that a minimum DO concentration is maintained throughout the river.

THE FIRST DESCRIPTION OF CHICKENPOX AS A DISEASE, BY WILLIAM HEBERDEN THE ELDER (1710-1801) IN 1767

PEDIATRICS ◽  
1970 ◽  
Vol 45 (4) ◽  
pp. 588-588
Author(s):  
T. E. C.
Keyword(s):  
The Body ◽  
The Third ◽  
Millet Seed ◽  
The Face ◽  
The Common ◽  
Loss Of Appetite ◽  
Full Maturity

Both Rosén von Rosenstein (1706-1773)1 and François Boissier de Sauvages (1706-1767)2 came close to differentiating varicella from variola. But, it was left to William Heberden3 to give the first detailed description of chickenpox as a disease sui generis in 1767 as follows: These pocks break out on many without any illness or previous sign: in others they are preceded by a little degree of chillness, lassitude, cough, broken sleep, wandering pains, loss of appetite and feverishness for three days. In some patients I have observed them to make their first appearance on the back, but this perhaps is not constant. Most of them are of the common size of the smallpox but some are less. I never saw them confluent nor very numerous. The greatest number which I ever observed was about twelve in the face, and two hundred over the rest of the body. On the first day of the eruption they are reddish: on the second day there is at the top of most of them a very small bladder about the size of a millet seed. This is sometimes full of a watery and colourless, sometimes of a yellowish, liquor contained between the cuticle and the skin. On the second or at the farthest on the third day from the beginning of the eruption as many of the pocks as are not broken seem arrived at their full maturity, and those which are fullest of that yellow liquor very much resemble what the genuine smallpox are on the fifth or sixth day especially where there happens to be a larger space than ordinary occupied by the extravasated serum.

Upgrading conventional treatment processes for water quality improvement - a pilot study

2002 ◽  
Vol 2 (5-6) ◽  
pp. 165-171
Author(s):  
J.-J. Chen ◽  
H.-H. Yeh ◽  
I.-C. Tseng ◽  
T.-F. Lin ◽  
W.-L. Lai
Keyword(s):  
Water Quality ◽  
Conventional Treatment ◽  
Profile Analysis ◽  
Eutrophic Lake ◽  
Total Hardness ◽  
The Third ◽  
Treatment Processes ◽  
Taste And Odor ◽  
Pilot Plant Test ◽  
Plant Test

Cheng Ching Lake Water Works (CCLWW), located in southern Taiwan, draws its raw water from a eutrophic lake, which is treated by conventional processes, including pre-chlorination, coagulation, sedimentation, filtration, and disinfection. As the taste- and odor-causing compounds from algae cannot be completely removed by conventional treatment processes, and the hardness is high, there are complaints about water quality. In searching for suitable processes to upgrade the existing facilities, a two-year pilot plant test was conducted. In total 13 processes were tested, which could be divided into three groups. The main feature of the first group was the modification of the existing conventional treatment processes, which included eliminating pre-chlorination and incorporating GAC. The second group incorporated pre- and post-ozonation, GAC bed, with or without pellet softening, into the conventional processes. The third group featured membrane processes, mainly nanofiltration (NF) and its various pretreatment processes, such as microfiltration (MF) or ultrafiltration (UF). The results show that although the first group has higher removal rates of dissolved organic and disinfection by-product precursors, as measured by NPDOC and THMFP, respectively, than those from the existing full-scale plants, the improvement in taste and odour was not adequate. For the second group, the dissolved organic parameters and biostability of the finished water were further improved, and half of the total hardness could be removed by pellet softening. However, earthy and fishy odours still could be detected occasionally by flavour profile analysis. Generally speaking, the third group with processes involving NF could produce the highest quality finished water: no matter organic, inorganic, organoleptic parameters, or biostability were concerned.

scholarly journals Evaluation water quality of Diyala River in Iraq using Bhargava method

2018 ◽  
Vol 162 ◽  
pp. 05001
Author(s):  
Nawar Al-Musawi
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
River Water ◽  
Water Quality Index ◽  
Quality Index ◽  
The Third ◽  
Tigris River ◽  
Good For ◽  
Diyala River

Diyala River is a tributary of Tigris River, it is one of the important rivers in Iraq. It covers a total distance of 445 km (275 miles). 32600 km2 is the area that drains by Diyala River between Iraqi-Iranian borders. This research aims to evaluate the water quality index WQI of Diyala River, where three stations were chosen along the river. These stations are D12 at Jalawlaa City at the beginning of Diyala River, the second station is D15 at Baaquba City at the mid distance of the river, and the third station is D17 which is the last station before the confluence of Diyala River with Tigris River at Baghdad city. Bhargava method was used in order to evaluate the water quality index for both irrigation and drinking uses. The results indicated that Diyala river water quality at its beginning was excellent for irrigation and good for drinking, while at the mid distance of the river, it was good for irrigation but heavily polluted and unsafe for drinking. Water quality of the river at the third site was acceptable for irrigation but again severely polluted and unsafe for drinking.

scholarly journals THE EFFECTS OF DIFFERENT CHILLING METHOD AND STORAGE TIME ON THE ORGANOLEPTIC QUALITY OF FRESH SKIPJACK TUNA

2018 ◽  
Vol 9 (2) ◽  
pp. 717-726
Author(s):  
Christina Litaay ◽  
Sugeng Hari Wisudo ◽  
John Haluan Haluan ◽  
Bambang Harianto
Keyword(s):  
Storage Time ◽  
Skipjack Tuna ◽  
Organoleptic Quality ◽  
The Third ◽  
Fish Product ◽  
And Storage

Fish freshness plays an importantant role in determining quality of fish product. Organoleptic is one of sensorik method for determining fish freshness. The fish deterioration mainly affected by temperature. This study aimed to determine the best method for determining organoleptic quality of skipjact tuna based on chilling methods and storage time. Fish sampling were taken from the Seram Sea, Maluku Province. Chilling methods was done by the different ratio between the ice and fish: first was without using ice, second was ratio 1:1 and the third was ratio 1:2. The time storage were 0, 2, 4, and 6 hours.The results showed that chilling methods ratio between the ice and fish of 1:1 with 6 hours storage time provided the best organoleptic quality with eye 8.87, mucus 8.83, gill 8.67, meat 8.73, odour 8.80, and texture 8.86.  Keywords: chilling methods, organoleptics, skipjact tuna

scholarly journals ECOLOGICAL AND PHYSIOLOGICAL ASPECTS OF STURGEON CULTIVATION IN INDUSTRIAL CONDITIONS

2017 ◽  
pp. 128-135
Author(s):  
Angelika Vyachislavovna Kovaleva ◽  
Petr Petrovich Geraskin ◽  
Vadim Alekseevich Grigoriev ◽  
Gennadiy Fedorovich Metallov ◽  
Elena Nikolaevna Ponomareva
Keyword(s):  
Serum Protein ◽  
Bacterial Contamination ◽  
Physiological State ◽  
Physiological Status ◽  
Water Supply Systems ◽  
Natural Habitats ◽  
Stellate Sturgeon ◽  
Lower Volga ◽  
Study Results ◽  
Sturgeon Fish

Physiological state of the stellate sturgeon female species ( Acipenser stellatus ) caught in spring in the fishing area in the Lower Volga delta and the female species farmed at the Bertyulckiy and Lebyahzje sturgeon fish-factories in the Astrakhan region were evaluated by biochemical parameters of blood taken in fish after hypophysial injection. At each sturgeon fish-factories there were revealed 2 groups of fish with different biochemical status. At the Bertyulskiy sturgeon fish-factory in the first group blood values were normal, in the second group the level of serum protein, β-lipoproteids, cholesterol and hemoglobin in blood was lower by 1.5, 4.3, 1.7 and by 1.2 times, correspondingly. At the Lebyahzje sturgeon fish-factory in female species of one group the level of serum protein, β-lipoproteids and cholesterol was even lower: in 1.8, 2.5 and 2.3 times. In the group of stellate sturgeon females with a lower concentration of biochemical components in blood there was revealed excessive total bacterial contamination: at the Bertyulskiy fish-factory - in 3 times, at the Lebyahzje - in 8 times. The results obtained allow to suggest the dependency of the bacterial contamination level on physiological status of fish. Study of stellate sturgeon females caught in spring in the lower reaches of the Volga and females used for fish breeding at the sturgeon fish-factory showed that under equal physiological status the level of total contamination of fish was much higher at the fish-factory, i.e. fish in natural habitats were more resistant to infection. The comparative analysis of physiological status of stellate sturgeon males and females caught in spring in the lower Volga and having similar physiological status revealed, that females during spawning run had higher level of total contamination. The study results can be used for the diagnosis and correction of the physiological state of sturgeons cultivated in ponds with closed water supply systems with the application of artificial feed.

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