scholarly journals Evaluation of genetic polymorphism of proteins in stellate sturgeon Acipenser stellatus (Pall) in aquaculture with reference to economically valuable traits

2021 ◽  
Vol 937 (3) ◽  
pp. 032033
Author(s):  
Elena Shishanova ◽  
Grigory Shishanov ◽  
Dmitry Isaev
Keyword(s):  
Genetic Polymorphism ◽  
Survival Rates ◽  
Natural Populations ◽  
Natural Environments ◽  
Economic Traits ◽  
Allelic Variants ◽  
Stellate Sturgeon ◽  
Size Growth ◽  
Economically Valuable Traits ◽  
Acipenser Stellatus

Abstract One of the main goals of sturgeon aquaculture is the restoration and renewal of wild populations of sturgeon fish in nature, which creates a tension between selective breeding with maintenance of valuable economic traits in a homozygous state and the need to conserve genetic diversity ensuring fitness in natural environments. It is generally assumed that important economic characteristics, such as body weight and size, growth rate, fecundity, etc., as well as fitness in fish, are associated with heterozygosity and genetic polymorphism of some key metabolic enzymes. It remains unclear whether aquaculture conditions can be as a whole selection factor in favor of certain allelic variants of these enzymes. To establish the relationship between some economic traits and enzymatic polymorphism, we studied the distribution of allelic variants of LDH-3, AAT-2, FGM, and Est enzymes in stellate sturgeon reared in aquaculture. We revealed a frequency bias of some allelic variants of the studied enzymes in a cohort of fish from the generation bred in aquaculture compared to the frequencies of those alleles in wild natural populations. Our study suggests that industrial breeding promotes selection in the direction of reducing size but increasing survival rates, which correlates with certain allelic variants.

scholarly journals MDR1 gene–related clonal selection and P-glycoprotein function and expression in relapsed or refractory acute myeloid leukemia

Blood ◽  
2001 ◽  
Vol 97 (11) ◽  
pp. 3605-3611 ◽  
Author(s):  
Marry M. van den Heuvel-Eibrink ◽  
Erik A. C. Wiemer ◽  
Marjan J. de Boevere ◽  
Bronno van der Holt ◽  
Paula J. M. Vossebeld ◽  
...  
Keyword(s):  
Acute Myeloid Leukemia ◽  
Genetic Polymorphism ◽  
Myeloid Leukemia ◽  
De Novo ◽  
Clonal Selection ◽  
Survival Rates ◽  
Mdr1 Gene ◽  
Allelic Variants ◽  
P Glycoprotein ◽  
Acute Myeloid

The expression of P-glycoprotein (P-gp), encoded by theMDR1 gene, is an independent adverse prognostic factor for response and survival in de novo acute myeloid leukemia (AML). Little is known about MDR1 expression during the development of disease. The present study investigated whether MDR1 gene– related clonal selection occurs in the development from diagnosis to relapsed AML, using a genetic polymorphism of the MDR1 gene at position 2677. Expression and function of P-gp were studied using monoclonal antibodies MRK16 and UIC2 and the Rhodamine 123 retention assay with or without PSC 833. No difference was found in the levels of P-gp function and expression between diagnosis and relapse in purified paired blast samples from 30 patients with AML. Thirteen patients were homozygous for the genetic polymorphism ofMDR1 (n = 7 for guanine, n = 6 for thymidine), whereas 17 patients were heterozygous (GT). In the heterozygous patients, no selective loss of one allele was observed at relapse. Homozygosity for the MDR1 gene (GG or TT) was associated with shorter relapse-free intervals (P = .002) and poor survival rates (P = .02), compared with heterozygous patients. No difference was found in P-gp expression or function in patients with AML with either of the allelic variants of the MDR1 gene. It was concluded that P-gp function or expression is not upregulated at relapse/refractory disease and expression of one of the allelic variants is not associated with altered P-gp expression or function in AML, consistent with the fact that MDR1 gene–related clonal selection does not occur when AML evolves to recurrent disease.

Assessment of food intensity and growth rate young sevryuga (Acipenser stellatus Pallas, 1771) depending on from the terms of fishing of growing ponds

2021 ◽  
pp. 36-47
Author(s):  
Ksenia Andreyevna Akhmedova ◽  
Lidia Mikhailovna Vasilyeva ◽  
Damelya Khazigaleeva Mazanova ◽  
Svetlana Alekseyevna Gutsulyak ◽  
Adelya Zakirovna Anokhina
Keyword(s):  
Growth Rate ◽  
Food Supply ◽  
Natural Populations ◽  
Water Bodies ◽  
Total Biomass ◽  
Artificial Reproduction ◽  
Feeding Intensity ◽  
Stellate Sturgeon ◽  
Acipenser Stellatus ◽  
Sturgeon Fish

Artificial reproduction of sturgeon fish in the Volga-Caspian basin in modern conditions is the only real opportunity to replenish natural populations with juveniles, therefore, increasing its efficiency is the key to restoring the stocks of these relict fish species. Improving the technological processes of growing juvenile sturgeon fish, including the Caspian stellate sturgeon, the number of which has been rapidly decreasing in recent years, is one of the main tasks at present. We studied the conditions for growing stellate sturgeon larvae in the nursery ponds for artificial reproduction at different periods of their watering. It is known that the stocking of ponds with larvae that have switched to exogenous feeding occurs at the end of June or the beginning of July, this coincides with the time of maximum water heating in nursery ponds to extreme (26–28 °C) values and with a depletion of the food supply in them. Hydrobiological studies were carried out to assess the food supply in water bodies that were watered in the traditional (June 12–14) terms (control option) and earlier (May 28) 2 weeks earlier than usual (experimental option). In addition, the intensity of feeding and the growth rate of juvenile starred sturgeon in the indicated ponds was studied for 20–24 days. The results of the studies performed showed that the food supply in the experimental pond was higher, so the zooplankton was represented by four orders, the biomass on average ranged from 2,8 to 4,6 g/m³, and in the control variant, planktonic organisms were represented by three orders, total biomass from 0,3 to 2,5 g/m³. The same tendency can be traced for zoobenthos. The feeding intensity of stellate sturgeon fry reared in ponds of early watering had indicators in terms of the gastrointestinal tract filling index, fatness coefficient and growth rates higher than the juveniles kept in water bodies of traditional watering periods.

scholarly journals Effects of Inbreeding on Genetic Characteristic, Growth, Survival Rates, and Immune Responses of a New Inbred Line of Exopalaemon carinicauda

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Jiajia Wang ◽  
Jitao Li ◽  
Qianqian Ge ◽  
Zhao Chen ◽  
Jian Li
Keyword(s):  
Immune Responses ◽  
Inbred Line ◽  
Survival Rates ◽  
The Body ◽  
Exopalaemon Carinicauda ◽  
Economic Traits ◽  
Gene Frequencies ◽  
Research Fields ◽  
Ssr Loci ◽  
Genetic Detection

The Exopalaemon carinicauda could be a useful crustacean laboratory animal in many research fields. We newly established an inbred line of Exopalaemon carinicauda named EC4 inbred line by brother×sister mating and keeping to F11 generation. Trends in heterozygosity in the process of producing EC4 inbred line were examined through the characterization of polymorphisms based on gene frequencies of SNP and EST-SSR loci. The results demonstrated that the number of alleles (N), observed heterozygosity (Ho), expected heterozygosity (He), and polymorphism information content (PIC) gradually decreased with the increase of inbreeding generations. The genetic detection results indicated that 9 (29.03%, 9/31) of the SNP loci and 15 (32.61%, 15/46) of the EST-SSR loci were homozygous in F11 generation of EC4 inbred line. The variation of the growth-related traits, the immune responses, and antioxidant status were described in experimental full-sibling inbred populations of E. carinicauda at five levels of inbreeding coefficient (F=0.785, F=0.816, F=0.859, F=0.886, F=0.908) under controlled laboratory conditions. The body weight, body length, and survival rate in EC4 inbred line of all generations were less than the control population. Inbreeding affected the antibacterial activity, phenoloxidase (PO) activity, and superoxide dismutase (SOD) which decreased at the eleventh generation of EC4 inbred line. This study demonstrated that inbreeding had a negative effect on the economic traits and immune response, but our inbred line was established successfully until F11 and confirmed by genetic detection using SNP and EST-SSR loci.

scholarly journals Natural variation in social conditions affects male mate choosiness in the amphipod Gammarus roeselii

2021 ◽  
Author(s):  
Konrad Lipkowski ◽  
Sophie Steigerwald ◽  
Lisa M Schulte ◽  
Carolin Sommer-Trembo ◽  
Jonas Jourdan
Keyword(s):  
Population Density ◽  
Sex Ratio ◽  
Natural Variation ◽  
Natural Populations ◽  
Social Background ◽  
Social Conditions ◽  
Background Information ◽  
Male Mating ◽  
Natural Environments ◽  
Male Mate

Abstract The extent of male mate choosiness is driven by a trade-off between various environmental factors associated with the costs of mate acquisition, quality assessment and opportunity costs. Our knowledge about natural variation in male mate choosiness across different populations of the same species, however, remains limited. In this study, we compared male mate choosiness across 10 natural populations of the freshwater amphipod Gammarus roeselii (Gervais 1835), a species with overall high male mating investments, and evaluated the relative influence of population density and sex ratio (both affecting mate availability) on male mate choosiness. We investigated amplexus establishment after separating mating pairs and presenting focal males with a novel, size-matched female from the same population. Our analysis revealed considerable effects of sex ratio and (to a lesser extent) population density on time until amplexus establishment (choosiness). Male amphipods are able to perceive variable social conditions (e.g., sex ratio) and modify their mating strategy accordingly: We found choosiness to be reduced in increasingly male-biased populations, whereas selectivity increases when sex ratio becomes female biased. With this, our study expands our limited knowledge on natural variations in male mate choosiness and illustrates the importance of sex ratio (i.e., level of competition) for male mating decisions in natural environments. Accounting for variation in sex ratios, therefore, allows envisioning a distinctive variation of choosiness in natural populations and highlights the importance of considering social background information in future behavioral studies.

Inbreeding effects among inbred and outbred laboratory colonies of Peromyscus maniculatus

1992 ◽  
Vol 70 (4) ◽  
pp. 820-824 ◽  
Author(s):  
David O. Ribble ◽  
John S. Millar
Keyword(s):  
Performance Measures ◽  
Reproductive Performance ◽  
First Generation ◽  
Peromyscus Maniculatus ◽  
Survival Rates ◽  
Natural Populations ◽  
Outbreeding Depression ◽  
Sibling Pairs ◽  
Laboratory Colonies ◽  
And Control

We examined the effects of sibling matings upon reproductive performance among inbred and outbred laboratory colonies of Peromyscus maniculatus. The inbred colony was founded by 12 females collected from one locality in Alberta and bred for 20 generations, with 35–45 pairs each generation. The outbred colony consisted of first-generation mice born of wild-caught females from diverse areas in Alberta. Consistent with theoretical expectations, there were no differences in reproductive performance between sibling and control (outbred) pairs within the inbred colony of mice. In contrast, sibling pairs had significantly fewer young per litter than control pairs within the outbred colony. Reproductive performance measures (proportion breeding, days from pairing to first litter, number of litters, and total number of offspring produced) were also significantly lower among sibling pairs from the outbred colony than among sibling pairs from the inbred colony. Lastly, we predicted that reproductive performance of the control pairs from the outbred colony would be less than that of control pairs from the inbred colony, due to outbreeding depression. Contrary to our predictions, average litter survival rates were greatest among the outbred colony control pairs. We suggest that the benefits of inbreeding or outbreeding extend broadly across the inbreeding–outbreeding continuum in natural populations of northern Peromyscus.

524 The changes in the parameters of energetic status of the stellate sturgeon Acipenser stellatus Palls spermatozoa after short-time exposure to lead ions in vitro

2003 ◽  
Vol 144 ◽  
pp. s140-s141
Author(s):  
I. Baranowska-Bosiacka ◽  
A. Rzemieniecki ◽  
M. Rutkowska ◽  
G.J. Dietrich ◽  
A. Ciereszko ◽  
...  
Keyword(s):  
Lead Ions ◽  
Time Exposure ◽  
Stellate Sturgeon ◽  
Acipenser Stellatus ◽  
Short Time

The effects of every-other-day feeding on the growth performance of yearling stellate sturgeon, Acipenser stellatus

2017 ◽  
Vol 30 (1) ◽  
pp. 39-46
Author(s):  
Christian Lane ◽  
Elisa J. Livengood ◽  
Richard D. Miles ◽  
Frank A. Chapman
Keyword(s):  
Growth Performance ◽  
Stellate Sturgeon ◽  
Acipenser Stellatus

Relation Between Egg Size, Growth, and Natural Mortality of Larval Fish

1975 ◽  
Vol 32 (12) ◽  
pp. 2503-2512 ◽  
Author(s):  
D. M. Ware
Keyword(s):  
Death Rate ◽  
Egg Size ◽  
Larval Fish ◽  
Juvenile Fish ◽  
Survival Rates ◽  
Fish Eggs ◽  
Trophic Relations ◽  
Size Growth ◽  
Dependent Growth ◽  
Eggs And Larvae

A set of density-dependent growth and survivorship equations is derived from evidence that the instantaneous death rate in the sea is inversely proportional to particle size. The survivorship equation reproduces several well-known phenomena observed in fish populations. It predicts: 1) that winter and spring spawning species ought to produce larger eggs than summer spawners, 2) that it is advantageous for species that spawn in batches to produce progressively smaller eggs in spring and summer, and 3) that the death rate of a cohort of fish should decrease continuously as the survivors grow and approach the critical size.The biological basis for the observed variation in the size of pelagic fish eggs and larvae is thought to be due primarily to trophic relations within the pelagic community. It is suggested from what is known of the relative abundance and foraging capabilities of different sized particles, that the survival rates of larval and juvenile fish should increase as they grow and occupy a progressively higher position in the food chain.

scholarly journals Pampean lizard assemblage from subtropical Brazil: a temporal analysis

2011 ◽  
Vol 83 (4) ◽  
pp. 1345-1358 ◽  
Author(s):  
Gisele R. Winck ◽  
Tiago G. Dos Santos ◽  
Sonia Z. Cechin
Keyword(s):  
Environmental Changes ◽  
Seasonal Pattern ◽  
Natural Populations ◽  
Temporal Analysis ◽  
Natural Environments ◽  
Human Occupation ◽  
Environmental Disturbances ◽  
Pampa Biome ◽  
History Of ◽  
Recruitment Period

The increasing human occupation of natural environments is one of the greatest threats to biodiversity. To mitigate the negative anthropogenic effects, it is necessary to understand the characteristics of natural populations and the natural history of species. A study was conducted with an assemblage of lizards from a disturbed area of the Pampa biome, from February 2001 to January 2004. The assemblage showed a unimodal seasonal pattern, with the recruitment period occurring during the warmer months. The captures were seasonal for two of the three monitored years, and concentrated within warmer months. The minimum temperature explained the number of catches for the assemblage as a whole. However, when the species were analyzed individually, the temperature only explained the seasonal occurrence of Teius oculatus. The abundance of species was significantly different in the third year of study for Cercosaura schreibersii and Ophiodes striatus. This latter species was no longer registered in the study area from May 2003 until the end of the study. Therefore, O. striatus may be more sensitive to environmental changes, considering the events of change in vegetation during the study. With frequent and increasing environmental disturbances, it is necessary to take conservation measures and encourage the increase of knowledge on Pampean lizards.

Formation and composition of trait melon (Сucumis melo L.) collection

2021 ◽  
pp. 98-108
Author(s):  
OH Kholodniak ◽  
OO Kholodniak ◽  
SL Pavlova
Keyword(s):  
Plant Breeding ◽  
Land Reclamation ◽  
Abiotic Factors ◽  
Phenotypic Variability ◽  
Starting Material ◽  
Biological Traits ◽  
Economic Traits ◽  
Economically Valuable Traits ◽  
History Of ◽  
Water Problems

The aim of the article was to present the results on the formation of a trait collection of melons at the Southern State Agricultural Experimental Station of the Institute of Water Problems and Land Reclamation of NAAS of Ukraine, which contains 57 specimens (one botanical species, one subspecies and three varieties) from 11 countries. Results and Discussion. The collection includes specimens with 35 economically valuable traits, which can be useful for the lecture course Plant Breeding and as starting material for breeding research institutions. Each specimen was comprehensively studied and evaluated for performance and resistance to biotic and abiotic factors and described in terms of morphological features for three years. In addition to the species diversity, the trait collections included specimens with different levels of expression of valuable economic and biological traits. The collection also included specimens selected by phenotypic variability of individual traits or their combinations. The results of multi-year work with the melon collection specimens allowed us to identify sources of valuable economic traits with high levels of their expression, which are of interest for the lecture course Plant Breeding. Conclusion. The history of the melon breeding in Ukraine is shown; breeding varieties, which are most widespread or were a significant breeding achievement in solving certain problems, are presented. The collection can be used in plant breeding and as starting material in research and educational institutions.

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