Using spatial data on habitat suitability in estimation of wild boar resources in Russia

Wild boar is one of the most important hunting husbandry resources in Eurasian boreal and temperate forests. In Russia, these animals inhabit a large part of the territory; however, official bodies do not allow public access to relevant and unbiased regional statistics. In parallel with official figures, such statistics have been kept for decades by VNIIOZ (All-Russian Scientific Research Institute for Hunting and Animal Breeding): the resource is estimated using the indirect method of recalculating multiple scores from independent respondents. We compared VNIIOZ long-term datasets with the wild boar habitat suitability distribution in the Russian territory to assess the reliability of these figures and to carry out a pilot evaluation of the need for their adjustment. Our results show a good correlation between the abundance assessment by VNIIOZ and habitat suitability (about 0.7); we also identified several regions where wild boar abundance indicators are sharply dissonant with the existing environmental capacity. We discussed the impact of man-made and natural factors on the population growth rate of wild boar in Russia.</jats:p

Acoustic properties of rare-earth alloys Tb0.27Dy0.73(Fe1-xMnx)1.9

The temperature and magnetic field dependences of transvers sound velocity for series of rare-earth compounds Tb0.27Dy0.73(Fe1-xMnx)1.9 (0<x<0.2) are studied experimentally. The maximum value of [MATH] G-effect has been obtained for concentration x=0.05. Double change of sign of nonlinear frequency shift for magnetoelastic mode in DC magnetic field rate 0<H<15 kOe was observed. The characteristic values of magnetic field strength for the change of sign are in agreement with mechanism of intermode nonlinear interaction

Species structure of small game hunting in the Kirov region at the beginning of the XXI century

An assessment of the species structure and size of small game prey for the spring and autumn-winter hunting seasons on the territory of the Kirov region was made, using a questionnaire survey based on the analysis of the prey of 3220 individuals. Small game includes such species (groups of species) as mallard, Northern shoveler, pintail, teal-whistle, teal cracker (Garganey), Eurasian wigeon, diving ducks, white-fronted goose, bean goose, wood grouse, black grouse, hazel grouse, woodcock, double snipe, snipe, corncrake, wood pigeon, turtle doves, white hare, European hare. The average index of production by species and groups of species per 1 hunter, who went hunting in the spring and autumn-winter seasons, has been calculated. The size of game catch during the spring hunting was 135.8 thousand individuals, in the autumn-winter hunting season -470 thousand individuals. The summation of the results obtained made it possible to estimate the volume of the total (annual) catch of small game in the amount of almost 606 thousand individuals. The main species are the mallard, hazel grouse, white hare, woodcock, black grouse, Eurasian wigeon, teal cracker (Garganey), Northern shoveler, wood grouse, white-fronted goose, bean goose, teal-whistle, their total share is 94.88% of the annual production of small game. The first five species can be assessed as the most massive in production (or popular), the share of each of them is over 10% of the total production, and in total they amount to 70.4%

Species structure of small game hunting in the Kirov region at the beginning of the XXI century

An assessment of the species structure and size of small game prey for the spring and autumn-winter hunting seasons on the territory of the Kirov region was made, using a questionnaire survey based on the analysis of the prey of 3220 individuals. Small game includes such species (groups of species) as mallard, Northern shoveler, pintail, teal-whistle, teal cracker (Garganey), Eurasian wigeon, diving ducks, white-fronted goose, bean goose, wood grouse, black grouse, hazel grouse, woodcock, double snipe, snipe, corncrake, wood pigeon, turtle doves, white hare, European hare. The average index of production by species and groups of species per 1 hunter, who went hunting in the spring and autumn-winter seasons, has been calculated. The size of game catch during the spring hunting was 135.8 thousand individuals, in the autumn-winter hunting season -470 thousand individuals. The summation of the results obtained made it possible to estimate the volume of the total (annual) catch of small game in the amount of almost 606 thousand individuals. The main species are the mallard, hazel grouse, white hare, woodcock, black grouse, Eurasian wigeon, teal cracker (Garganey), Northern shoveler, wood grouse, white-fronted goose, bean goose, teal-whistle, their total share is 94.88% of the annual production of small game. The first five species can be assessed as the most massive in production (or popular), the share of each of them is over 10% of the total production, and in total they amount to 70.4%.</jats:p

Genetic Diversity, Admixture and Analysis of Homozygous-by-Descent (HBD) Segments of Russian Wild Boar

The wild boar is the wild ancestor of the domestic pig and one of the most common species of ungulates. At the beginning of the 20th century, the wild boar was practically exterminated in the European part of Russia. In the period 1935–1988, 7705 boars were caught in various regions of the European part of Russia, the Far East, Ukraine, Belarus, Kyrgyzstan, Kazakhstan, Latvia, Lithuania, Estonia, Tajikistan and resettled in the territory of Russia. Asian and European wild boars dwell the territory of Russia. The aim of our research was to study the genetic diversity and structure of wild boar populations in different regions of Russia using genome-wide genotyping. We have determined the genetic distances, population structure, parameters of genetic diversity and significantly expanded our understanding of the genetic state of the Russian wild boar. For the first time, we calculated autozygosity of the wild boar of the European and Asian subspecies using Homozygous-by-Descent (HBD) Segments analysis, which is important in terms of population recovery. We also found evidence of hybridization between Russian wild boar and domestic pigs. A group of European wild boars showed introgression of the Asian boar into population. The mean level of the inbreeding coefficient in European wild boar was higher than in Asian wild boar, and combined groups of the European boar had higher inbreeding coefficient than Russian wild boars. These results obtained can be used in population management.</jats:p

Genetic Diversity, Admixture and Analysis of Homozygous-by-Descent (HBD) Segments of Russian Wild Boar

The wild boar is the wild ancestor of the domestic pig and one of the most common species of ungulates. At the beginning of the 20th century, the wild boar was practically exterminated in the European part of Russia. In the period 1935–1988, 7705 boars were caught in various regions of the European part of Russia, the Far East, Ukraine, Belarus, Kyrgyzstan, Kazakhstan, Latvia, Lithuania, Estonia, Tajikistan and resettled in the territory of Russia. Asian and European wild boars dwell the territory of Russia. The aim of our research was to study the genetic diversity and structure of wild boar populations in different regions of Russia using genome-wide genotyping. We have determined the genetic distances, population structure, parameters of genetic diversity and significantly expanded our understanding of the genetic state of the Russian wild boar. For the first time, we calculated autozygosity of the wild boar of the European and Asian subspecies using Homozygous-by-Descent (HBD) Segments analysis, which is important in terms of population recovery. We also found evidence of hybridization between Russian wild boar and domestic pigs. A group of European wild boars showed introgression of the Asian boar into population. The mean level of the inbreeding coefficient in European wild boar was higher than in Asian wild boar, and combined groups of the European boar had higher inbreeding coefficient than Russian wild boars. These results obtained can be used in population management

Точное измерение магнитострикции в ферромагнитных пластинах

The paper describes an automated setup for measurement of magnetostrictive strain in ferromagnetic plates and films. The setup uses standard foil strain-gauges and allows the strain measurement in the range 1–2000 ppm at magnetic field up to 2 kOe. Temperature of the sample under test is stabilized with 0:05oС accuracy and can be varied from 10⁰С to 80⁰С. The sample can be rotated, settling the angle between its axis and magnetic field direction in the range 0⁰C-90⁰C. The setup was used to measure magnetostriction vs. magnetic field dependences for metglas, nickel, and permendur plates. The magnetostriction over field derivatives were calculated, which are important for study of magnetoelectric effect in composite structuresВ работе описана автоматизированная установка для измерения магнитострикции пластин и пленок ферромагнитных материалов. В основе работы установки лежит тензометрический метод с использованием стандартных пленочных тензодатчиков. Диапазон измеряемых деформаций составляет 1–2000 ppm в полях до 2 кЭ. Температура образца стабилизирована и может поддерживаться с точностью 0:05oС в диапазоне 10-80 ⁰С. Предусмотрен поворот образца в пределах 0-90 ⁰C. С помощью описанной установки были измерены полевые зависимости магнитострикции метгласа, никеля и пермендюра. Рассчитаны производные от магнитострикции по полю, необходимые для исследования магнитоэлектрического эффекта в композитных структурах

Точное измерение магнитострикции в ферромагнитных пластинах

The paper describes an automated setup for measurement of magnetostrictive strain in ferromagnetic plates and films. The setup uses standard foil strain-gauges and allows the strain measurement in the range 1–2000 ppm at magnetic field up to 2 kOe. Temperature of the sample under test is stabilized with 0:05oС accuracy and can be varied from 10⁰С to 80⁰С. The sample can be rotated, settling the angle between its axis and magnetic field direction in the range 0⁰C-90⁰C. The setup was used to measure magnetostriction vs. magnetic field dependences for metglas, nickel, and permendur plates. The magnetostriction over field derivatives were calculated, which are important for study of magnetoelectric effect in composite structuresВ работе описана автоматизированная установка для измерения магнитострикции пластин и пленок ферромагнитных материалов. В основе работы установки лежит тензометрический метод с использованием стандартных пленочных тензодатчиков. Диапазон измеряемых деформаций составляет 1–2000 ppm в полях до 2 кЭ. Температура образца стабилизирована и может поддерживаться с точностью 0:05oС в диапазоне 10-80 ⁰С. Предусмотрен поворот образца в пределах 0-90 ⁰C. С помощью описанной установки были измерены полевые зависимости магнитострикции метгласа, никеля и пермендюра. Рассчитаны производные от магнитострикции по полю, необходимые для исследования магнитоэлектрического эффекта в композитных структурах