The issue of assessment of efficiency of works on land reclamation fisheries in inland waters of Russia

2021 ◽  
pp. 8-20
Author(s):  
Andrey Dmitrievich Bykov ◽  
Svetlana Yuryevna Brazhnik
Keyword(s):  
Fish Species ◽  
Land Reclamation ◽  
Long Term Results ◽  
Predatory Fish ◽  
Federal State ◽  
Inland Waters ◽  
Ecological Group ◽  
Spawning Grounds ◽  
Commercial Fish

The article considers the issue of assessing the long-term results of work on fisheries reclamation in inland waters of fisheries significance in Russia, carried out by the branches of the Federal State Budgetary Institution “Glavrybvod” on the state task in terms of their effectiveness. The relationship between dredging and clearing of watercourse beds and the dynamics of the number of producers of semi-navigable and non-aquatic fish in these rivers during spawning migrations has not been established. With long-term mowing of wetland vegetation in the shallow waters of reservoirs, deltas of large rivers and estuaries, there is no increase in their commercial fish productivity. A number of examples show the opposite effect of this type of work, which leads to a local deterioration of the ecological state of these reservoirs. At the same time, the repeatedly proven method of combating higher aquatic vegetation in the reservoirs of the south of Russia in low water conditions as biomelioration, based on the introduction of fish, consumers of autotrophic products by regional branches of the Federal State Budgetary Institution “Glavrybvod” is practically not used. When installing artificial spawning grounds in the littoral zone of reservoirs, regular ichthyological monitoring of the effectiveness of spawning on them is not carried out. There are no reliable data confirming the significant positive impact of artificial spawning grounds on the population dynamics of commercial fish species of the limnophilic ecological group under conditions of significant spring water level depletion in Russian reservoirs. When catching predatory and low-value fish species in water bodies, legal obstacles arise due to the fact that the volume of seizure of predatory fish includes commercial objects for which the ODE is established annually and their catch is already carried out according to industrial quotas.

Commercial fish species of inland waters: A model for sustainability assessment and management

2014 ◽  
Vol 497-498 ◽  
pp. 642-650 ◽  
Author(s):  
Vladica M. Simić ◽  
Snežana B. Simić ◽  
Milica Stojković Piperac ◽  
Ana Petrović ◽  
Djuradj Milošević
Keyword(s):  
Fish Species ◽  
Sustainability Assessment ◽  
Inland Waters ◽  
Commercial Fish

scholarly journals Invasive potential of retroperitoneal well-differentiated liposarcomas depending on the extent of sclerosing component in the tumor

2020 ◽  
Vol 25 (2) ◽  
pp. 50-55
Author(s):  
A. Yu. Volkov ◽  
N. A. Kozlov ◽  
S. N. Nered ◽  
I. S. Stilidi ◽  
A. M. Stroganova ◽  
...  
Keyword(s):  
Long Term Results ◽  
Federal State ◽  
Invasive Potential ◽  
Morphological Marker ◽  
Favorable Prognosis ◽  
National Medical ◽  
Well Differentiated ◽  
Organ Invasion ◽  
Primary Retroperitoneal

Objective. To assess the influence of the extent of sclerosing component in the retroperitoneal well-differentiated liposarcoma (WDLPS) on the survival. Material and methods. The retrospective study included 111 patients with primary retroperitoneal WLPS who underwent radical surgical treatment in Federal State Budgetary Institution N.N. Blokhin National Medical Research Center of Oncology. Histological slides of all surgical specimens were reviewed by experienced pathologist and reclassified according to criteria of WHO (2013). Patients were divided into groups depending on the extent of the sclerosing component in the tumor and enrolled in intergroup analysis. We analyzed relationship between extent of the sclerosing component in the tumor and frequency of the pathologically confirmed visceral invasion. Also, we have analyzed the influence of the visceral invasion of WDLPS on the long-term results overall (OS) and recurrence-free (RFS) survival. Results. Pathologically confirmed visceral invasion was revealed in 17% of cases with the sclerosing component less 20%, and in 31% of cases with the sclerosing component more 20%. OS was significantly worse in the group of patients who suffered from WDLPS with visceral invasion than in the group of patients without visceral invasion (p = 0.009; logarithmic criterion). The median OS in the compared groups was 85 (95% CI, 84, 87) and 142 (95% CI, 109, 175) months, the 5-year OS rate was 41% and 86%, respectively. RFS was significantly worse in the group of patients with histologically confirmed visceral invasion than in the group without organ invasion (p = 0.001; logarithmic criterion). Median RFS in the compared groups was 26 (95% CI, 20, 32) and 57 (95% CI, 38, 76) months, 2-year RFS 33% and 85%, respectively. Conclusion. Results of the study demonstrate more aggressive behavior of WDLPS with increasing extent of the sclerosing component. We believe that semi-quantitative counting of sclerosing component in retroperitoneal WDLPS can serve as an effective morphological marker of a less favorable prognosis of the disease.

scholarly journals A review of reproduction biology and spawning/ nursery grounds of the most important Adriatic commercial fish species in the last two decades

2020 ◽  
Vol 61 (1) ◽  
pp. 89-100 ◽  
Author(s):  
Barbara Zorica ◽  
Ana Pešić ◽  
Bojan Marčeta ◽  
Milica Mandić ◽  
Corrado Piccinetti ◽  
...  
Keyword(s):  
Fish Species ◽  
Scientific Knowledge ◽  
Systematic Research ◽  
Commercial Fish ◽  
Nursery Grounds ◽  
Good State ◽  
Reproduction Biology ◽  
The Status ◽  
Scientific Platform

Recently, despite long-term systematic research of the Adriatic Sea ecosystem, the necessity to improve the existing protection of commercially exploited species occurred since the status of many renewable marine stocks were not in good state. In order to realize that review of scientific knowledge gather within the last two decades was required. In this paper emphasis has been placed on all the scientific knowledge concerning the reproductive biology, spawning and nursery grounds of four ecologically and economically important Adriatic fish species – sardine Sardina pilchardus, anchovy Engraulis encrasicolus, European hake Merluccius merluccius, Common pandora, Pagellus erythrinus. Main aim of this review was to establish new scientific platform that in near future should result with better conservation measures that will insure long-term sustainability of exploited marine living resources.

scholarly journals Long-term dynamics of radionuclide contamination formation in the industrial іchthyofauna of the Kaniv Reservoir

2021 ◽  
pp. 108-115
Author(s):  
V. Skiba ◽  
N. Prisyazhnyuk ◽  
O. Volkova ◽  
V. Belyaev ◽  
S. Prishlyak
Keyword(s):  
Specific Activity ◽  
The Body ◽  
Predatory Fish ◽  
Entire Body ◽  
137Cs Content ◽  
Specific Content ◽  
Commercial Fish ◽  
Radionuclide Contamination ◽  
Carnivorous Species

The aim the study is to determine the temporal parameters of the long-lived radionuclides specific activity decrease in the commercial fish species of the Kaniv Reservoir for the period 1987–2021. Rutilus rutilus, Scardinius erythrophthalmus, Blissa bjoerkna, Abramis brama, Pelecus cultratus (peaceful species) and Esox lucius, Stizostedion lucioperca (carnivorous species) were selected in the middle and lower parts of the reservoir in January 2021 to determine the current levels of radioactive contamination in the representatives of the commercial ichthyofauna of the Kaniv Reservoir. The specific activity of 90Sr and 137Cs was determined in the entire body of fish by conventional radiochemical and gamma-spectrometric methods. The analysis of the dynamic characteristics of the radionuclides content in the representatives of the reservoir ichthyofauna was carried out on the basis of the results of studies of 90Sr and 137Cs content in fish during 1987–2012 and their specific activity in the body in 2021. In 2021, the average specific activity of 90Sr in fish was 0.6–1.6 Bq/kg, 137Cs - 2.4–13.2 Bq/kg. According to the results of previous studies, the average specific content of 90Sr in the fish of the Kaniv Reservoir decreased by approximately 6.5 times - from 60 ± 30 to 9 ± 3 Bq / kg during 1987-1993, and by 2003 it decreased by another 5 times up to 1.8 ± 0.8 Bq / kg and did not exceed the values recorded in freshwater fish in Ukraine before the Chernobyl accident in 1979–1985. Consequently, during the period of 2003–2021 the levels of 90Sr content in fish from the Kaniv Reservoir remained virtually unchanged. Based on the data on 137Cs accumulation in various feeding types fish in the Kaniv Reservoir, time parameters describing a decrease in the element specific activity were determined. During 1987–2021 the rate of decrease in 137Cs content in peaceful and predatory fish did not differ significantly and amounted to 0.10 ± 0.01 year-1, the period of effective half-decrease was 6.7 ± 0.7 years. Analysis of long-term data made it possible to distinguish 2 periods during which the specific activity of 137Cs in the fish organism decreased at different rates. In 1987-2004, 137Cs content levels in peaceful fish decreased from 70 ± 22 to 6.1 ± 2.2 Bq/kg, in carnivorous species - from 202 ± 41 to 19.8 ± 7.6 B/ kg, i.e. approximately by 10–11 times, which corresponds to a half-decrease of about 6 years. In 2004–2021 the element content in peaceful fish decreased to 2.9 ± 0.7 Bq/kg, in predatory fish - to 7.3 ± 4.1 Bq/kg, that is, by another 2–3 times, which corresponds to a half-decrease of 12 ± 3 years. Thus, it was found that the rate of decrease in 137Cs specific activity in fish slows down over time. The obtained parameters will make it possible to predict with a high degree of accuracy the dynamics of the radionuclide contamination formation in ichthyofauna in the event of artificial radionuclides entering aquatic ecosystems as a result of emergency situations. Key words: Kaniv Reservoir, fish, radionuclides, longterm dynamics, rate of decrease.

427: Long Term Results of Laparoscopic Retroperitoneal Lymph Node Dissection in Clinical Stage I NSGCT

2005 ◽  
Vol 173 (4S) ◽  
pp. 116-117
Author(s):  
Hannes Steiner ◽  
Reinhard Peschel ◽  
Tilko Müller ◽  
Christian Gozzi ◽  
Georg C. Bartsch ◽  
...  
Keyword(s):  
Lymph Node ◽  
Lymph Node Dissection ◽  
Clinical Stage ◽  
Stage I ◽  
Long Term Results ◽  
Retroperitoneal Lymph Node Dissection ◽  
Node Dissection ◽  
Retroperitoneal Lymph Node
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