scholarly journals Analysis of hunting management and reliability of variable sizes in calculations of wild boar population dynamics

2021 ◽  
pp. 9-24
Author(s):  
Marko Ivanovic ◽  
Vukan Lavadinovic
Keyword(s):  
Population Dynamics ◽  
Population Growth ◽  
Wild Boar ◽  
Analysis Data ◽  
Wild Boar Population ◽  
Professional Literature ◽  
Hunting Management ◽  
The Impact ◽  
Hunting Ground

The analysis performed in this study focused on the hunting management of wild boar in the hunting ground "Dulenska reka", as well as on the impact of knowledge of the species and its monitoring in the field, which can lead to an incredible difference in hunting management The aim of this study was to analyze wild boar management and determine the differences between the variables used to calculate population dynamics. For the purposes of the analysis, data from planning documents and professional literature were used, and the calculations of population dynamics were performed in Excel. The results indicate that the number of wild boar in the hunting ground is increasing, and the consequence of different sizes in the calculations of population dynamics as well as the mismatch of planned and realized shooting can be the reasons that directly affect population growth.

scholarly journals Linking individual phenotype to density-dependent population growth: the influence of body size on the population dynamics of malaria vectors

2011 ◽  
Vol 278 (1721) ◽  
pp. 3142-3151 ◽  
Author(s):  
Tanya L. Russell ◽  
Dickson W. Lwetoijera ◽  
Bart G. J. Knols ◽  
Willem Takken ◽  
Gerry F. Killeen ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Body Size ◽  
Population Growth ◽  
Vector Control ◽  
Anopheles Gambiae ◽  
Phenotypic Expression ◽  
Phenotypic Traits ◽  
Density Dependent ◽  
Individual Fitness ◽  
The Impact

Understanding the endogenous factors that drive the population dynamics of malaria mosquitoes will facilitate more accurate predictions about vector control effectiveness and our ability to destabilize the growth of either low- or high-density insect populations. We assessed whether variation in phenotypic traits predict the dynamics of Anopheles gambiae sensu lato mosquitoes, the most important vectors of human malaria. Anopheles gambiae dynamics were monitored over a six-month period of seasonal growth and decline. The population exhibited density-dependent feedback, with the carrying capacity being modified by rainfall (97% w AIC c support). The individual phenotypic expression of the maternal ( p = 0.0001) and current ( p = 0.040) body size positively influenced population growth. Our field-based evidence uniquely demonstrates that individual fitness can have population-level impacts and, furthermore, can mitigate the impact of exogenous drivers (e.g. rainfall) in species whose reproduction depends upon it. Once frontline interventions have suppressed mosquito densities, attempts to eliminate malaria with supplementary vector control tools may be attenuated by increased population growth and individual fitness.

scholarly journals Damage caused by red deer (Cervus elaphus) & wild boar (Sus scrofa) in forest hunting grounds in Serbia

2009 ◽  
pp. 15-32 ◽  
Author(s):  
Dragan Gacic ◽  
Milorad Danilovic
Keyword(s):  
Population Structure ◽  
Wild Boar ◽  
Systematic Study ◽  
Cervus Elaphus ◽  
Sus Scrofa ◽  
Red Deer ◽  
Natural Food ◽  
Beech Forests ◽  
Hunting Management ◽  
Hunting Ground

The systematic study and assessment of the damage by big game in forest hunting grounds in Serbia was infrequent, although the damage was evident. The objective of this paper is to identify the rates and types of damage by red deer and wild boar at three localities: (1) fenced part of the hunting ground 'Crni Lug' (Srem), (2) fenced part of the hunting ground 'Podunavsko Loviste Plavna' (Southwestern Backa), and (3) fenced rearing centre 'Lomnicka Reka' (Mt. Veliki Jastrebac). The damage was not recorded on locality (1). The damage on locality (2) (new polar plantations) and locality (3) (beech forests) was caused by red deer. The main causes of the damage were excessive density and disturbed population structure (sex and age), nonharmonised forest and hunting management, shortage of natural food, especially of pasture areas.

scholarly journals Disease-mediated piglet mortality prevents wild boar population growth in fenced overabundant settings

2020 ◽  
Vol 66 (2) ◽  
Author(s):  
Jose A. Barasona ◽  
María A. Risalde ◽  
Jose A. Ortíz ◽  
David Gonzalez-Barrio ◽  
Azlan Che-Amat ◽  
...  
Keyword(s):  
Population Growth ◽  
Wild Boar ◽  
Wild Boar Population ◽  
Piglet Mortality

scholarly journals Mast seeding in deciduous forests of the northern Apennines (Italy) and its influence on wild boar population dynamics

2013 ◽  
Vol 70 (5) ◽  
pp. 493-502 ◽  
Author(s):  
Andrea Cutini ◽  
Francesco Chianucci ◽  
Roberta Chirichella ◽  
Emanuela Donaggio ◽  
Luca Mattioli ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Wild Boar ◽  
Northern Apennines ◽  
Deciduous Forests ◽  
Mast Seeding ◽  
Wild Boar Population

scholarly journals Wild boar management (Sus scrofa L.) in the Republic of Serbia

2020 ◽  
pp. 47-60
Author(s):  
Vukan Lavadinovic ◽  
Zoran Popovic ◽  
Dejan Beukovic ◽  
Kristijan Cokoski
Keyword(s):  
Wild Boar ◽  
Population Abundance ◽  
Wild Boar Population ◽  
Game Species ◽  
The Past ◽  
Hunting Management ◽  
Management Plans ◽  
Crop Damages ◽  
The Republic ◽  
Human Wildlife Conflict

Wild Boar is an autochthonous big game species important for the domestic hunting sector. In the past decades this species is increasing in number across Europe, which influences the extent of crop damages and intensity of the human-wildlife conflict. In this study Wild Boar hunting management was analyzed both at the national and regional level. For that purpose data from management plans of 272 hunting grounds were used. Beside the management plans, this study includes a survey of 377 hunters. The results indicate that Wild Boar population abundance is increasing in the Republic of Serbia, partially because the planned and realized shooting are not harmonized. There are differences in hunting management between the regions of Vojvodina and Central Serbia. The survey has shown that among domestic hunters Wild Boar is a popular game species, especially due to the attractive way of hunting.

scholarly journals Drivers of large-scale spatial demographic variation in a perennial plant

2020 ◽  
Author(s):  
Gesa Römer ◽  
Ditte M. Christiansen ◽  
Hendrik de Buhr ◽  
Kristoffer Hylander ◽  
Owen R. Jones ◽  
...  
Keyword(s):  
Growth Rate ◽  
Population Dynamics ◽  
Environmental Factors ◽  
Population Growth ◽  
Spatial Variation ◽  
Population Growth Rate ◽  
Forest Understory ◽  
Environmental Drivers ◽  
Vital Rates ◽  
The Impact

AbstractTo understand how the environment drives spatial variation in population dynamics, we need to assess the effects of a large number of potential drivers on the vital rates (survival, growth and reproduction), and explore these relationships over large geographical areas and long environmental gradients. In this study, we examined the effects of a broad variety of abiotic and biotic environmental factors, including intraspecific density, on the demography of the forest understory herb Actaea spicata between 2017 and 2019 at 40 sites across Sweden, including the northern range margin of its distribution. We assessed the effect of potential environmental drivers on vital rates using generalized linear mixed models (GLMMs), and then quantified the impact of each important driver on population growth rate (λ) using integral projection models (IPMs). Population dynamics of A. spicata were mostly driven by environmental factors affecting survival and growth, such as air humidity, soil depth and forest tree species composition, and thus those drivers jointly determined the realized niche of the species. Soil pH had a strong effect on the flowering probability, while the effect on population growth rate was relatively small. In addition to identifying specific drivers for A. spicata’s population dynamics, our study illustrates the impact that spatial variation in environmental conditions can have on λ. Assessing the effects of a broad range of potential drivers, as done in this study, is important not only to quantify the relative importance of different drivers for population dynamics but also to understand species distributions and abundance patterns.

The demography of terrestrial orchids: life history, population dynamics and conservation

2019 ◽  
Vol 192 (2) ◽  
pp. 315-332 ◽  
Author(s):  
Richard P Shefferson ◽  
Hans Jacquemyn ◽  
Tiiu Kull ◽  
Michael J Hutchings
Keyword(s):  
Population Dynamics ◽  
Population Growth ◽  
Abiotic Factors ◽  
Adult Life ◽  
Life Cycles ◽  
Individual Plant ◽  
Vital Rates ◽  
Net Reproductive Rate ◽  
Terrestrial Orchids ◽  
The Impact

Abstract Terrestrial orchid life-cycles are complex and dependent on pollinators and mycorrhizal associates. Worldwide, orchid populations are declining because of urbanization, atmospheric nitrogen deposition and climate change. To advance understanding of the factors determining orchid population viability, we review knowledge about orchid demography, life histories and population dynamics. Orchids can produce thousands of seeds, although few survive to reach maturity, with mortality rates declining from juvenile to adult life states. Flowering and fruiting rates vary widely between years, and many populations, especially of deceptive species, are pollen- and seed-limited. Many species have long lifespans and periods of vegetative dormancy and exhibit costs associated with reproduction, sprouting, vegetative dormancy, growth and size. Population growth rates range from 0.50–2.92 (mean: 0.983 ± 0.026). Although vital rates can fluctuate widely between years and be strongly correlated, these correlations have little impact on population dynamics. Variation in spatial density of fungi and microsite quality, limited dispersal and competition generate density dependence in vital rates. Future research should elucidate the roles of biotic and abiotic factors on population dynamics to underpin effective management for conservation. Understanding the impact of idiosyncratic individual plant behaviour on population dynamics will also improve demographic parameter estimation, including population growth rate and net reproductive rate.

scholarly journals Estimation of the Lethality Rate, Recovery Rate, and Case Fatality Ratio of Classical Swine Fever in Japanese Wild Boar: An Analysis of the Epidemics From September 2018 to March 2019

2021 ◽  
Vol 8 ◽  
Author(s):  
Ryota Matsuyama ◽  
Takehisa Yamamoto ◽  
Yoko Hayama ◽  
Ryosuke Omori
Keyword(s):  
Population Dynamics ◽  
Wild Boar ◽  
Recovery Rate ◽  
Case Fatality ◽  
Classical Swine Fever ◽  
Accurate Estimation ◽  
Detailed Data ◽  
Wild Boar Population ◽  
Case Fatality Ratio ◽  
In The Wild

Understanding the morbidity and lethality of diseases is necessary to evaluate the effectiveness of countermeasure against the epidemics (e.g., vaccination). To estimate them, detailed data on host population dynamics are required; however, estimating the population size for wildlife is often difficult. We aimed to elucidate the morbidity and lethality of classical swine fever (CSF) currently highly prevalent in the wild boar population in Japan. To this end, we estimated lethality rate, recovery rate, and case fatality ratio (CFR) of CSF without detailed data on the population estimates of wild boar. A mathematical model was constructed to describe the CSF dynamics and population dynamics of wild boar. We fitted the model to the (i) results of the reverse transcription polymerase chain reaction (RT-PCR) test for the CSFV gene and the (ii) results of the enzyme-linked immunosorbent assay (ELISA) test for the antibody against CSFV in sampled wild boar. In the 280 wild boar sampled from September 2018 to March 2019 in the major CSF-affected area in Japan, the lethality rate and recovery rate of CSF per week were estimated as 0.165 (95% confidence interval: 0.081–0.250) and 0.004 (0–0.009), respectively. While the estimate of lethality rate of CSF was similar with the estimates in previous studies, the recovery rate was lower than those reported previously. CFR was estimated as 0.959 (0.904–0.981) using our estimate of recovery rate. This study is the first to estimate lethality rate of CSF from the dynamics of CSF epidemics in the wild boar population. Since the value of CFR is sensitive to the value of recovery rate, the accuracy in the estimate of recovery rate is a key for the accurate estimation of CFR. A long-term transmission experiment of moderately virulent strains may lead to more accurate estimation of the recovery rate and CFR of CSF.

scholarly journals Epizootic and epidemiological situation of Trichinella sp. infection in Poland in 2006–2015 in view of wild boar population dynamics

2017 ◽  
Vol 61 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Marian Flis ◽  
Eugeniusz R. Grela ◽  
Dariusz Gugała
Keyword(s):  
Population Dynamics ◽  
Wild Boar ◽  
Fold Increase ◽  
Reservoir Host ◽  
Wild Boar Population ◽  
Annual Population ◽  
Infection Source ◽  
Wild Boar Meat ◽  
Hunting Statistics ◽  
Epidemiological Situation

AbstractIntroduction: The objective was to evaluate the epizootic and epidemiological situation of Trichinella sp. infection in Poland between 2006 and 2015 against the dynamics of the wild boar population and its primary reservoir host.Material and Methods: Boar and porcine trichinosis epizootic analysis was based on General Veterinary Inspectorate data from RRW-6 bulletins. The epidemiological situation was evaluated on the basis of the data supplied by the Department of Epidemiology of the National Institute of Hygiene - National Institute of Public Health. The wild boar hunting harvest and population dynamics were estimated, as these animals remain the basic infection source for humans. Population size and harvest data were obtained from hunting statistics.Results: The study timeframe showed an almost 2.5-fold increase in Trichinella infection cases in wild boars but a significant decline in human cases. In the domestic pig, the incidence rate did not exceed 0.00037%. The highest infection risk exists in West Pomerania, Greater Poland, and Kuyavian-Pomeranian Provinces. Over the study period, the wild boar population increased more than 1.5-fold, while the hunting harvest more than tripled. During the last two seasons the total hunt surpassed 100% of the spring population.Conclusion: Wild boar management by increasing the hunting take of the annual population growth should limit that growth and decrease the take in the future. Thereby, over some years intra-species trichinosis spread should reduce, for a substantial safety gain for wild boar meat.

Long-term population dynamics of the red deer and European roe deer at the protected and not-protected areas in Mountain Crimea

2017 ◽  
Vol 7 (4) ◽  
pp. 65-72
Author(s):  
V. N. Shmagol' ◽  
V. L. Yarysh ◽  
S. P. Ivanov ◽  
V. I. Maltsev
Keyword(s):  
Population Dynamics ◽  
Protected Areas ◽  
Red Deer ◽  
Nature Reserve ◽  
Roe Deer ◽  
Precipitation Amount ◽  
Annual Precipitation ◽  
Population Number ◽  
The Impact

<p>The long-term population dynamics of the red deer (<em>Cervus elaphus</em> L.) and European roe deer (<em>Capreolus</em> <em>capreolus</em> L.) at the mountain and forest zone of Crimea during 1980-2017 is presented. Fluctuations in numbers of both species are cyclical and partly synchronous. Period of oscillations in the population of red deer is about 25 years, the average duration of the oscillation period of number of roe deer is 12.3 years. During the fluctuations in the number the increasing and fall in population number of the red deer had been as 26-47 %, and roe deer – as 22-34 %. Basing on the dada obtained we have assumed that together with large-scale cycles of fluctuations in population number of both red deer and roe deer the short cycles of fluctuations in the number of these species with period from 3.5 to 7.5 years take place. Significant differences of the parameters of cyclical fluctuations in the number of roe deer at some sites of the Mountainous Crimea: breaches of synchronicity, as well as significant differences in the duration of cycles are revealed. The greatest deviations from the average values of parameters of long-term dynamics of the number of roe deer in Crimea are noted for groups of this species at two protected areas. At the Crimean Nature Reserve the cycle time of fluctuations of the numbers of roe deer was 18 years. At the Karadag Nature Reserve since 1976 we can see an exponential growth in number of roe deer that is continued up to the present time. By 2016 the number of roe deer reached 750 individuals at a density of 437 animals per 1 thousand ha. Peculiarity of dynamics of number of roe deer at some sites proves the existence in the mountain forest of Crimea several relatively isolated groups of deer. We assumed that "island" location of the Crimean populations of red deer and European roe deer, their relatively little number and influence of permanent extreme factors of both natural and anthropogenic origination have contributed to a mechanism of survival of these populations. The elements of such a mechanism include the following features of long-term dynamics of the population: the reduction in the period of cyclic population fluctuations, while maintaining their amplitude and the appearance of additional small cycles, providing more flexible response of the population to the impact of both negative and positive environmental factors. From the totality of the weather conditions for the Crimean population of roe deer the recurring periods of increases and downs in the annual precipitation amount may have relevance. There was a trend of increase in the roe deer population during periods of increasing annual precipitation.</p>

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