scholarly journals PHYSIOLOGICAL INDICES OF BELUGA AND SHIP AND THEIR INTERSPECIFIC HYBRIDS IN FISH-FARM CONDITIONS

2020 ◽  
Vol 2020 (4) ◽  
pp. 154-164
Author(s):  
Elena Mikhailovna Evgrafova ◽  
Olga Pyatikopova ◽  
Irina Bedritskaya ◽  
Ekaterina Pavlovna Yakovleva ◽  
Anisia Victorovna Dubovskaya ◽  
...  
Keyword(s):  
Interspecific Hybrids ◽  
Relative Weight ◽  
Physiological Status ◽  
Morphophysiological Indicators ◽  
Sturgeon Species ◽  
Experimental Base ◽  
Acipenser Nudiventris ◽  
Second Year ◽  
Growing Conditions ◽  
Land Vertebrates

The objects of research are Beluga (Huso huso, Linnaeus), sturgeon spike (Acipenser nudiventris, Lovetsky) and their interspecific hybrids of artificial generation grown on the Research and Experimental Base BIOS (the Astrakhan region) by using the basin method. To assess the physiological status of fish, a set of morphophysiological indicators (absolute and relative weight of gills, heart, liver, and gonads) were used. The dynamics of the indices of the corresponding viscera of Beluga and sturgeon spike and their interspecific hybrids in the second year of cultivation was studied. The necessity for the research is explained by the fact that most work performed was carried out on land vertebrates and on fish of natural generation. There have been presented the average values of morphophysiological indices for each of the four groups of unmixed sturgeon species and their hybrids. The obtained values of the studied parameters of sturgeon species can be used for further monitoring of the fish growing conditions using the basin method.

scholarly journals Genetic variation and relationships of seven sturgeon species and ten interspecific hybrids

2013 ◽  
Vol 45 (1) ◽  
pp. 21 ◽  
Author(s):  
Xiaomin Zhang ◽  
Wenhua Wu ◽  
Linmiao Li ◽  
Xufa Ma ◽  
Jinping Chen
Keyword(s):  
Genetic Variation ◽  
Interspecific Hybrids ◽  
Sturgeon Species

scholarly journals Interspecific hybridization of sturgeon species affects differently their gonadal development

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 1-10 ◽  
Author(s):  
Z. Linhartová ◽  
M. Havelka ◽  
M. Pšenička ◽  
M. Flajšhans
Keyword(s):  
Interspecific Hybridization ◽  
Germ Cells ◽  
Sertoli Cells ◽  
Interspecific Hybrids ◽  
Gonad Development ◽  
Gonadal Development ◽  
Genetic Origin ◽  
Ploidy Levels ◽  
Sturgeon Species ◽  
Fertile Hybrids

Gonad development in fish is generally assumed to be negatively influenced by interspecific hybridization, resulting in sterility or sub-sterility. However, this is not the case in sturgeons (Acipenseridae), in which fertile hybrids are common. In the present study, we investigated gonad development in several sturgeon interspecific hybrids and purebred species. Six interspecific hybrid groups and three purebred groups were analyzed including 20 hybrid specimens with even ploidy, 40 specimens having odd ploidy levels, and 30 purebred specimens. Hybrids of species with the same ploidy (even ploidy – 2n, 4n) exhibited normally developed gonads similar to those seen in purebred specimens. In contrast, hybrids of species differing in ploidy (odd ploidy – 3n) did not display fully developed gonads. Ovaries were composed of oocytes or nests of differentiating oocytes that ceased development in early stages of meiosis (pachytene to zygotene) with a higher content of adipose and apoptotic tissue. Testes contained single spermatogonia along with Sertoli cells and spaces lacking germ cells. The obtained results showed that gonad development was influenced by genetic origin and ploidy of the sturgeon hybrids and were consistent with full fertility of hybrids with even ploidy. Sterility of females, but possibly limited fertility of males, is suggested for hybrids with odd ploidy.

scholarly journals PRELIMINARY RESULTS OF EXPERIMENTAL WORK ON PRODUCING OFFSPRING AND COMPARATIVE EVALUATION OF PURE SPECIES (WHITE STURGEON, FRINGEBARBEL STURGEON) AND THEIR INTERSPECIES HYBRIDS (WHITE STURGEON × FRINGEBARBEL STURGEON AND FRINGEBARBEL STURGEON × WHITE STURGEON)

2020 ◽  
Vol 0 (1) ◽  
pp. 111-117
Author(s):  
Ekaterina Yakovleva ◽  
Valentina Shevchenko ◽  
Vera Gnucheva
Keyword(s):  
Experimental Work ◽  
Survival Rates ◽  
White Sturgeon ◽  
Pure Species ◽  
Growth And Survival ◽  
Interspecies Hybrids ◽  
Sturgeon Species ◽  
Experimental Base ◽  
Comparative Results ◽  
Hybrid Forms

The article presents the comparative results of the experimental work on studying valuable pure species offspring (white sturgeon, fringebarbel sturgeon) and their interspecies hybrid forms (white sturgeon × fringebarbel sturgeon and fringebarbel sturgeon × white sturgeon) in the early stages of ontogenesis. The tests were carried out in the research and experimental base BIOS (the Astrakhan region) in 2019. The fish-breeding and biological characteristics of the producers of parental species that participated in the crossing to produce reciprocal hybrid forms are presented. The interbreeding scheme was developed. The complex study was conducted at the stage of the early ontogenesis. Observing over eggs development took place at all significant stages of embryogenesis. The survival rates of one-day prolarvae of all experimental groups, in relation to the eggs laid for the incubation, and their weight data became the result of the experiment. The results of the experimental work will help to develop proposals for the exploitation of broodstock producers of pure sturgeon species to produce hybrid offspring, which may have increased growth and survival rates both at the stages of embryogenesis and the active feeding of larvae, and during juveniles rearing, which is a promising factor for commercial aquaculture.

scholarly journals Long-Term Follow-Up of the Telemonitoring Weight-Reduction Program “Active Body Control”

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Gabriele Stumm ◽  
Alexandra Blaik ◽  
Siegfried Kropf ◽  
Sabine Westphal ◽  
Tanja Katrin Hantke ◽  
...  
Keyword(s):  
Weight Reduction ◽  
Relative Weight ◽  
First Year ◽  
Weight Changes ◽  
Weight Reduction Program ◽  
The Metabolic Syndrome ◽  
Reduction Program ◽  
Long Term Follow Up ◽  
Second Year

The Active Body Control (ABC) weight-reduction program is based on telemonitoring of physical activity and nutrition together with telecoaching by weekly counseling letters sent by post or by e-mail. The study presented here reports the results of a 1-year follow-up of 49 patients with the metabolic syndrome who had lost weight with the aid of the ABC program in the preceding year. The weight regain after the second year in patients not receiving any further care (“ABC discontinued” group;n=24) and the potential benefit of continuing with the ABC program with monthly counseling letters (“ABC continued” group;n=25) were investigated. The relative weight changes after the first year had been, respectively, −13.4% and −11.4% in the “ABC discontinued” and “ABC continued” groups, and after the second year they decreased by, respectively, 4.4 and 2.8%. However, this difference in weight regains between the two groups was not statistically significant. It is concluded that three-quarters of the weight loss after 1 year is maintained after the second year. The decision whether to continue with the ABC program after 1 year should be made individually.

Harvest management affects yield and persistence of birdsfoot trefoil (Lotus corniculatus L.) in cool summer climates

2004 ◽  
Vol 84 (2) ◽  
pp. 525-528 ◽  
Author(s):  
D. B. McKenzie ◽  
Y. A. Papadopoulos ◽  
K. B. McRae
Keyword(s):  
Dry Matter ◽  
Stand Density ◽  
Lotus Corniculatus ◽  
Birdsfoot Trefoil ◽  
Harvest Management ◽  
Cool Summer ◽  
Simulated Grazing ◽  
Second Year ◽  
Growing Conditions ◽  
Cool Climate

Two studies determined the effect of birdsfoot trefoil harvest managements on persistence, productivity, and species composition under cool summer growing conditions. Single and double cut managements were harvested at 10, 50, and 100% bloom; triple cuts and simulated grazing were also evaluated. Double cut harvest management produced considerably more dry matter yield (DMY) in the first production year, but its advantage over single cuts in the second year depended on bloom at harvest. Harvesting at 10% bloom for single (and perhaps double) cuts appears to be the best system based on DMY, trefoil content, and stand density. Key words: Lotus corniculatus L., growth stage, stand density, simulated grazing, cool climate

scholarly journals BREEDING CHARACTERISTICS OF PERENNIAL FORMS OF INTERSPECIFIC HYBRIDS OF ALLIUMS

2018 ◽  
pp. 18-24
Author(s):  
V. S. Romanov ◽  
A. S. Domblides ◽  
L. Yu. Kan ◽  
A. V. Soldatenko ◽  
M. M. Tareeva
Keyword(s):  
Downy Mildew ◽  
Interspecific Hybrids ◽  
Field Experiments ◽  
Standard Technique ◽  
High Fertility ◽  
Breeding Programs ◽  
Interspecies Hybridization ◽  
Experimental Base ◽  
Number Of Leaves ◽  
The Cross

In breeding programs agriculture, interspecies hybridization is an important tool for creating a genetically updated source material in the breeding of varieties. The material consisted of perennial plants of interspecific hybrids of onions BC2(F3-5(A. cepa x A. fistulosum)), BC1(F1-5(A. cepa x A. vavilovii)), F5(A. cepa x A. altaicum) and their inbred offspring. As standard on biometrics and the susceptibility of plants with downy mildew used a variety of onion Odintsovets, as this grade participated in the conduct of the saturating crosses of onion and perennial species A. fistulosum L., A. altaicum Pall. Field experiments were carried out according to the standard technique in conditions of the Moscow region at the experimental base of FSBSI FSVC. Based on the results of the research highlighted in the form of combinations of the cross A. cepa x A. vavilovii and A. cepa x A. fistulosum and A. cepa x A. altaicum interest to breeding in number of leaves, length of leaves, number of seedstalks, the height of the seedstalks, high fertility and relatively high resistance to Peronospora destructor. Forms combination of the cross A. cepa x A. vavilovii was characterized by uniformity the number of seedstalks (5-7 PCs), the height of the seedstalks (96 cm) and resistance to downy mildew (1.0-1.5 score). Forms combination of the cross A. cepa x A. fistulosum stood uniformity by the number of seedstalks (5 PCs), the height of the seedstalks (85-96 cm), resistance to downy mildew (1.0-1.5 score) and a high fertility rate (over 60%). On the basis of the company "regrowth – mass setting of seeds" in each combination of mating types was allocated a separate form, which was distinguished by precocity: BC1(F5(A. cepa x A. vavilovii)) (86 days), BC2(F5(A. cepa x A. fistulosum)) (63 days), I1F5(A. cepa x A. altaicum) (61 days).

SEASONAL PERFORMANCE OF MORPHOPHYSIOLOGICAL INDICATORS FOR EXAMPLE THE YOUNG OF RUSSIAN STURGEON, ACCORDING TO THE FEEDING MODE AND FOOD COMPOSITION

2017 ◽  
pp. 107-116
Author(s):  
Aliya Baimuratovna Akhmedzhanova ◽  
Miburo Zachary ◽  
Yurii Viktorovich Alymov ◽  
Alexander Alekseevich Kokoza
Keyword(s):  
Physiological State ◽  
Food Composition ◽  
Russian Sturgeon ◽  
Physiological Status ◽  
Average Weight ◽  
Feeding Mode ◽  
Acipenser Gueldenstaedtii ◽  
Loss Of Weight ◽  
Morphophysiological Indicators ◽  
Combined Feed

The article presents the results of the accelerated recovery after loss of weight and physiological status after wintering, for example, Russian sturgeon ( Acipenser gueldenstaedtii , Brandt) juveniles aged 1+…2+ years in LLC "Fish farm "Aquatrade" (the Astrakhan Region). There was determined weight, length, fatness of fishes, content of hemoglobin, whey protein, lipids, cholesterol in blood, erythrocytes sedimentation rate at the age of 18 months (before wintering), 24 months (after wintering), 25 and 26 months (in the feeding process), 31 months (after recovering period). Before wintering the young was characterized by optimum physiological rates, after wintering (age 24 months) physiological state got worse; weight loss made 7-8%; fatness decreased from 0.48 ± 0.03 to 0.45 ± 0.4 units. At the first stage of the experiment after wintering the young was fed by compound feed "Aquarex 48/17" (higher content of lipids and protein, experiment) and "Aquarex 45/12" (standard recipe, control). Feed duration was not longer than 25 days. Growth rate of the young under experiment appeared higher that that under control: on average, weight of fishes aged 25 months made 600 ± 21.1 (experiment) and 560 ± 2.6 g (control). Further feed of the young aged before 26 months, and further up to 31 months with standard recipy feed both in experiment and in controll showed more intensive growth in the experimental group: at the end of experiment weight of fishes made 1064.5 ± 33.8 (experiment) and 727.2 ± 32.9 (control). Young physiological status greatly optimized. Short-term feeding of the sturgeon young after wintering with combined feed "Aquarex 48/17" shortens the period of recovering from losses of weight and physiological status to 5 days and shoprtens time and costs of growing commodity product.

DAMAGE POTENTIAL OF THE SWEETCLOVER WEEVIL, SITONA CYLINDRICOLLIS (COLEOPTERA: CURCULIONIDAE), IN THE CANADIAN PRAIRIES

1978 ◽  
Vol 110 (8) ◽  
pp. 883-889 ◽  
Author(s):  
C. H. Craig
Keyword(s):  
Cultural Practices ◽  
Forage Yield ◽  
Sweet Clover ◽  
Damage Potential ◽  
Field Cage ◽  
Canadian Prairies ◽  
Melilotus Officinalis ◽  
Second Year ◽  
Growing Conditions ◽  
Type Of Injury

AbstractAdults of the sweetclover weevil, Sitona cylindricollis Fähr., injure seedling, vegetative, and yearling sweet clover, Melilotus officinalis (L.) Lam. In field cage tests an infestation of 1 weevil: 7 seedlings at the cotyledon stage destroyed less than 5%, and an infestation of 1 weevil: 1 seedling destroyed 100% of the seedlings. Significant reduction of seedlings was caused by infestations of I weevil: 3 or 5 seedlings depending upon growing conditions. An infestation of 4.5 to 9 weevils per emergent second-year plant caused a significant reduction, and an infestation of 18 weevils per plant caused almost total destruction of second-year forage yield. In the Canadian mid-west, weevil populations seldom exceed these minimum threshold values, therefore the weevil should not be considered a deterrent to either stand establishment or to stand retention in the second year. Defoliation of vegetative clover by weevils at the beginning of and mid-way through the critical period, which extends from 15 August to 20 September, caused a 50% loss of second-year forage yield. Because of cultural practices associated with sweet clover production in western Canada this may be the most severe type of injury wrought by the weevil.

scholarly journals Measuring delayed luminescence by FES to evaluate special quality aspects of food samples – an overview

2019 ◽  
Vol 4 (1) ◽  
pp. 410-417
Author(s):  
Peter Stolz ◽  
Jenifer Wohlers ◽  
Gudrun Mende
Keyword(s):  
Food Samples ◽  
Molecular Structures ◽  
Physiological Status ◽  
Farming Practices ◽  
Delayed Luminescence ◽  
Fluorescence Excitation ◽  
Physiological Processes ◽  
Measuring Devices ◽  
Quality Aspects ◽  
Growing Conditions

AbstractThe measuring devices which are used for measuring delayed luminescence by Fluorescence Excitation Spectroscopy (FES) are described. Results are given to show the measured emission of food samples in relation to farming practices (biodynamic, organic, or conventional) and growing conditions. This overview points to the special food-quality aspects which could be evaluated by FES. A relation to molecular structures, the physiological status, or possible physiological processes are discussed as important for the characteristic delayed luminescence after colour- (wavelength-) specific excitation.

Bioindicators of the constants of homeostasis of the internal environment of crustaceans, cultured in different environmental conditions for the purpose of obtaining commodity products

2021 ◽  
pp. 57-69
Author(s):  
Lina Yuryevna Lagutkina ◽  
Aliya Baymuratovna Akhmedzhanova ◽  
Sergey Vladimirovich Ponomarev ◽  
Alexander Sergeevich Martyanov
Keyword(s):  
Environmental Conditions ◽  
The State ◽  
Warm Water ◽  
Physiological Status ◽  
Internal Environment ◽  
Red Claw Crayfish ◽  
Growing Conditions ◽  
High Level ◽  
High Degree ◽  
State Of The Environment

The study of the composition and properties of the internal environment (hemolymph) of crustaceans grown in various conditions has an important ecological and physiological aspect, since a number of characteristics of the physiological status of objects can be used to assess the state of the environment, thus, they can be included in the number of bioindicators. However, the nature of the observed differences between objects grown under different conditions, the features of homeostatic regulatory mechanisms and the limits of the reference values of individual homeostasis constants are often not known. To formulate recommendations regarding the technological process of growing objects of warm-water aquaculture, taking into account the assessment of environmental conditions in dynamics through the analysis of indicators of the state of individuals — bioindicators — it is necessary to compare the state of individuals kept in different conditions. The object of the study was the Australian red claw crayfish Cherax quadricarinatus (Von Martens, 1868), cultivated under various conditions of intensive and semi-intensive cultivation. The studies have revealed that throughout the entire period of cultivation, individuals grown in ponds retained a high level of total protein, cholesterol and β-lipoproteins, in contrast to crayfish cultivated in pools. The values of these indicators as bioindicators indicate a high degree of compliance of the growing conditions with the needs of the studied object. Comparative assessment of fluctuations in the ratio of hemolymph shaped elements in the hemocyte composition between cancers grown under different conditions did not reveal significant differences. It was found that significantly higher growth rates are characteristic of crayfish grown in ponds, in contrast to the group of individuals cultivated in pools. The comparative analysis of bioindicators in different growing conditions presented by the authors of the article supplements information that is of significant interest for monitoring the growing conditions of this representative of warm water aquaculture, which will be valuable for specialists engaged in crustacean breeding.

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