Готові списки джерел за темами / Earthworms Population viability analysis

Зміст

  1. Статті в журналах
  2. Дисертації
  3. Книги
  4. Частини книг
  5. Тези доповідей конференцій
  6. Звіти організацій

Добірка наукової літератури з теми "Earthworms Population viability analysis"

Автор: Grafiati
Опубліковано: 4 червня 2021
Оновлено: 7 лютого 2022

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Earthworms Population viability analysis".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Earthworms Population viability analysis"

1

Reed, J. Michael. "Population Viability Analysis." Auk 120, no. 1 (2003): 237. http://dx.doi.org/10.1642/0004-8038(2003)120[0237:pva]2.0.co;2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Cuthbert, Richard. "Population Viability Analysis." Biological Conservation 114, no. 1 (November 2003): 153. http://dx.doi.org/10.1016/s0006-3207(02)00402-0.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Fieberg, John. "Population viability analysis." Journal of Biogeography 31, no. 3 (February 24, 2004): 515–16. http://dx.doi.org/10.1046/j.0305-0270.2003.01027.x.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

SHAFFER, MARK L. "Population Viability Analysis." Conservation Biology 4, no. 1 (March 1990): 39–40. http://dx.doi.org/10.1111/j.1523-1739.1990.tb00265.x.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Boyce, M. S. "Population Viability Analysis." Annual Review of Ecology and Systematics 23, no. 1 (November 1992): 481–97. http://dx.doi.org/10.1146/annurev.es.23.110192.002405.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Reed, J. Michael. "Population Viability Analysis." Auk 120, no. 1 (January 1, 2003): 237–39. http://dx.doi.org/10.1093/auk/120.1.237.

Повний текст джерела
Анотація:
Abstract The following critiques express the opinions of the individual evaluators regarding the strengths, weaknesses, and value of the books they review. As such, the appraisals are subjective assessments and do not necessarily reflect the opinions of the editors or any official policy of the American Ornithologists' Union.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Rexstad, Eric. "Population Viability Analysis." Wildlife Society Bulletin 32, no. 2 (June 2004): 606–7. http://dx.doi.org/10.2193/0091-7648(2004)32[606:br]2.0.co;2.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Beier, Paul, S. R. Beissinger, and D. R. McCullough. "Population Viability Analysis." Journal of Wildlife Management 67, no. 4 (October 2003): 890. http://dx.doi.org/10.2307/3802694.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Diogéne, J., M. Dufour, G. G. Poirier, and D. Nadeau. "Extrusion of earthworm coelomocytes: comparison of the cell populations recovered from the species Lumbricus terrestris, Eisenia fetida and Octolasion tyrtaeum." Laboratory Animals 31, no. 4 (October 1, 1997): 326–36. http://dx.doi.org/10.1258/002367797780596068.

Повний текст джерела
Анотація:
Coelomocytes were extruded from three earthworm species: Lumbricus terrestris, Eisenia fetida and Octolasion tyrtaeum. Featuring a simple low-vacuum holding device, the proposed methodology allows the recovery of cells with minimum risk of contamination by faecal material. The viability of O. tyrtaeum coelomocytes was highly reproducible (average 93%), with an average yield of 0.92 × 106 viable cells per earthworm. Cell viability for L. terrestris and E. fetida averaged ~68% but the cell yields were higher (respectively 1.67 × 106 and 1.28 × 106). Large inter-individual differences in cell yields were observed with L. terrestris. Flow cytometric analyses indicated species to species differences in cell populations. Coelomocytes from E. fetida were the smallest with ~57% of the total viable cells recovered being monitored between 2 and 10 µm. Large granulated cells (≥20 µm) were detected in fairly large proportions in L. terrestris and O. tyrtaeum [~52 and ~96%, respectively) while they were less abundant in E.fetida (~9%). Using the vital dye neutral red to assess functional integrity, average cellular uptakes were significantly higher for L. terrestris and O. tyrtaeum than for E. fetida (2.94, 2.66 and 0.64 µg/2 × 105 cells, respectively). In summary, the extrusion methodology herein described is applicable for the recovery of coelomocytes from a wide range of earthworm sizes and species. Moreover, this study strengthens the fact that extruded coelomocytes could be used for the evaluation of cell dysfunction and/or cell death following an in vitro and/or in vivo treatment.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Li, Yiming, and Li Dianmo. "Advance in population viability analysis." Biodiversity Science 02, no. 1 (1994): 1–10. http://dx.doi.org/10.17520/biods.1994001.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Дисертації з теми "Earthworms Population viability analysis"

1

Ramula, Satu. "Population viability analysis for plants : practical recommendations and applications." Doctoral thesis, Stockholm : Department of Botany, Stockholm University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-845.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Hartup, Wendi Winter. "Assessing persistence of two rare darter species using population viability analysis models." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/HARTUP_WENDI_17.pdf.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Strem, Rosa I. "Population viability analysis of the blue-throated macaw (Ara glaucogularis) using individual-based and cohort-based PVA programs." Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1219175814.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Cobanoglu, Aziz Emre. "Identification Of Demographic Structure And Population Viability Analysis Of Gazella Subgutturosa In Sanliurfa." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611676/index.pdf.

Повний текст джерела
Анотація:
Goitered gazelle (Gazella subgutturosa) is an Asian antelope species and it is classified as Vulnerable by IUCN. They have an economic, esthetic and cultural value
therefore, they had been hunted and domesticated for a long time. Additional human disturbance over years nearly led goitered gazelle populations in Turkey to extinction. Today in Turkey, only natural population of goitered gazelle lives in Sanlurfa. In this theses, demographic structure and population parameters of natural population goitered gazelle in Sanliurfa is studied. Line transect and regular surveys are performed to collect data about demographic structure of the population such as sex ratio and group composition. Line transect sampling, which is a distance sampling technique, is used to estimate population size and density of the population. GPS collared goitered gazelles are monitored for fecundity and survival rate. Data is collected for 18 from July 2008 to December 2009 during 32 field surveys. Four main transect samplings have been performed and including transect samplings that are done during regular surveys, 90 line transects are walked. Population sizes and densities were estimated to be (average ±
standard error) 242 ±
184 and 2.302 ±
1.590 individual per km2 for July 2008
365 ±
179 and 3.476 ±
1.707 individual per km2 for January 2009
319 ±
111 and 3.039 ±
1.059 individual per km2 for June 2009 and lastly, 317 ±
243 and 3.019 ±
2.315 for November 2009. Survival rate is estimated to be 0.276, 0.540 and 0.585 for calves, 1 year old and 2+ years olds respectivelty, and fecundity is estimated to be 0.4. This preliminary study shows that according to Population Viability Analysis results, natural goitered gazelle population in Turkey will be extinct in next 10 years if more effective conservation is not performed.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Wakamiya, Sarah M. "A habitat and population viability analysis for potential peregrine falcon reintroductions in southern Illinois /." Available to subscribers only, 2008. http://proquest.umi.com/pqdweb?did=1650505341&sid=3&Fmt=2&clientId=1509&RQT=309&VName=PQD.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Robinson, Christopher. "Metapopulation viability of swamp rabbits (Sylvilagus aquaticus) in southern Illinois." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1282.

Повний текст джерела
Анотація:
Swamp rabbits (Sylvilagus aquaticus) in southern Illinois exist as a metapopulation due to loss and fragmentation of the bottomland hardwood forests in which they live, making their persistence in the state uncertain. I ran a spatially-explicit population viability analysis (PVA) on the metapopulation, using a habitat suitability map I created and life history parameters drawn from the literature. I varied parameters related to reproduction, survival, catastrophes, dispersal, and carrying capacity from 50 to 150% of the initial value of each parameter to compare their effects on extinction risk. I modified the map to test the effects of potential habitat loss, fragmentation, and the addition of dispersal corridors on the swamp rabbit metapopulation in southern Illinois. Under baseline conditions, the model suggested about a 20% chance of quasi-extinction (90% metapopulation decline) in 25 years. Changes in fecundity values and the effects of catastrophic flooding had the greatest effect on the risk of extinction, causing quasi-extinction probabilities to range from 0 to 100% and 0 to 87%, respectively. In contrast, changing dispersal values yielded the least impact on the risk of extinction (18-24%), and all other parameters had moderate impacts on the model. Removing groups of the largest habitat patches increased the risk of extinction, whereas removing groups of the smallest habitat patches decreased the risk of extinction, suggesting that small patches could act as population sinks with a negative impact on swamp rabbit persistence. Decreasing patch fragmentation per se reduced the risk of extinction slightly. The addition of dispersal corridors made no significant impact on the probability of extinction. My findings indicate that more research estimating fecundity and the effect of catastrophic floods on swamp rabbits in Illinois is required to more accurately predict swamp rabbit persistence in the state. I also suggest that managers should work to decrease the effect of flooding on the population by improving upland habitat, or decrease fragmentation by increasing the area of bottomland hardwood forests around existing habitat patches. Lastly, I suggest managers focus on preventing further habitat fragmentation into small patches, which will mitigate the creation of potential sink populations and will enable current populations to persist.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Colteaux, Benjamin C. "The Status of Snapping Turtles (Chelydra serpentina) in Virginia: Population Viability, Demography, Regulatory Analysis, and Conservation." VCU Scholars Compass, 2017. https://scholarscompass.vcu.edu/etd/5162.

Повний текст джерела
Анотація:
Snapping turtles (Chelydra serpentina) are being harvested in unprecedented numbers in the United States (US) to meet the needs of international markets. Over three million live snapping turtles from farm and wild caught stock were exported from the US to Asia in 2012-14 alone. In the Commonwealth of Virginia, records indicate that 29,860 snapping turtles were commercially harvested between 2000 and 2015. Size limits are often used to regulate harvest pressure in snapping turtles and other game species. I analyzed the historic harvest of eleven US states to test the efficacy of minimum-size limit regulations at reducing commercial harvest pressure. Further, I conducted a four-year mark-recapture study on three Virginia waterways that have each experienced a different level of historic commercial harvest. As part of the larger mark/recapture project, I conducted radio telemetry on 23 turtles to examine seasonal, body size, and sex-specific effects on home range size of snapping turtles in a lotic system. I incorporated survival and growth rates from this study, demographic rates from the literature, and state-collected harvest rates into a hybrid age/stage population matrix model to estimate the population growth rate at three harvest levels (0%, 21%, 58%) that were estimated based on annual commercial landing reports on file with the Virginia Department of Game and Inland Fisheries. I used the model to test population viability under multiple size limit regulations, and used sensitivity analyses to identify adult stages most critical to the overall population growth rate. Based on model estimates, size-limits were effective at reducing harvest by 30-87% in years with high harvest pressure. However, most size limit regulations result in the removal of larger breeding adults, which has been shown to be detrimental to long term population viability. Based on radio-telemetry data, I found evidence that snapping turtles utilize lotic and lentic habitats differently, which can have implications for management of this iconic species. Matrix population modelling predicted that population densities at the moderate and high harvest site were reduced by 47% and 62%, respectively, when compared to the no harvest site. Model results indicate that, while an increase to the minimum-size limit in 2012 protected a larger portion of the population, that the commercial harvest of snapping turtles in the Commonwealth of Virginia is not sustainable under current state regulations. Our analysis suggests that minimum-size limits of 35.6 cm curved carapace length or greater will maintain viable populations by protecting a larger portion of reproducing snapping turtles within a population.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Kappler, Rachel Hope. "Exploring the Population Viability of Green Ash (Fraxinus pennsylvanica) with a Stage-Based Model." Bowling Green State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1528132089275356.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Muiznieks, Britta Dace. "Population viability analysis of Puerto Rican parrots an assessment of its current status and prognosis for recovery /." Connect to this title online, 2003. http://www.lib.ncsu.edu/theses/available/etd-06192003-121313/unrestricted/etd.pdf.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Hagen, Christian Andrew. "A demographic analysis of lesser prairie-chicken populations in southwestern Kansas : survival, population viability, and habitat use /." Search for this dissertation online, 2003. http://wwwlib.umi.com/cr/ksu/main.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Книги з теми "Earthworms Population viability analysis"

1

Keedwell, R. J. Use of population viability analysis in conservation management in New Zealand. Wellington, N.Z: Dept. of Conservation, 2004.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Aldridge, Cameron L. Developing a habitat-based population viability model for greater sage-grouse in southeastern Alberta, 2001 report. Edmonton: Alberta Sustainable Resource Development, 2001.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Zhili︠a︡ev, G. G. Zhiznesposobnostʹ populi︠a︡t︠s︡iĭ rasteniĭ. Lʹvov: NANU In-t ėkologii Karpat, 2005.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Baral, Hem Sagar. The state of Nepal's birds, 2004. Kathmandu: Dept. of National Parks and Wildlife Consevation, 2005.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Inskipp, Carol, Hem Sagar Baral, and Tim Inskipp. The state of Nepal's birds, 2010: Indicators for our changing world. Kathmandu: Bird Conservation Nepal, 2011.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Osmundson, Douglas B. Population status and trends of Colorado pikeminnow of the Upper Colorado River, 1991-2005: Final report. Grand Junction, CO: U.S. Fish and Wildlife Service, Colorado River Fishery Project, 2009.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Osmundson, Douglas B. Population status and trends of Colorado pikeminnow of the Upper Colorado River, 1991-2005: Final report. Grand Junction, CO: U.S. Fish and Wildlife Service, Colorado River Fishery Project, 2009.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Schwartz, Charles C. Cumulative effects model verification, sustained yield estimation, and population viability management of the Kenai Peninsula, Alaska brown bear. Juneau, AK (P.O. Box 25526 Juneau 99802): Alaska Dept. of Fish and Game, Division of Wildlife Conservation, 1999.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

C, White Gary, Recovery Program for Endangered Fish of the Upper Colorado River Basin., and U.S. Fish and Wildlife Service., eds. Population status and trends of Colorado pikeminnow of the Upper Colorado River, 1991-2005: Final report. Grand Junction, CO: U.S. Fish and Wildlife Service, Colorado River Fishery Project, 2009.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Schwartz, Charles C. Cumulative effects model verification, sustained yield estimation, and population viability management of the Kenai Peninsula, Alaska brown bear. [Juneau, AK]: Alaska Department of Fish and Game, Division of Wildlife Conservation, 1997.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Частини книг з теми "Earthworms Population viability analysis"

1

Elith, J., and M. A. Burgman. "Habitat Models for Population Viability Analysis." In Ecological Studies, 203–35. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-09389-4_8.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Ralls, Katherine, and Barbara L. Taylor. "How Viable Is Population Viability Analysis?" In The Ecological Basis of Conservation, 228–35. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6003-6_23.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Akçakaya, H. Reşit. "Population Viability Analysis and Risk Assessment." In Wildlife 2001: Populations, 148–57. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2868-1_14.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Durant, S. M., and G. M. Mace. "Species differences and population structure in population viability analysis." In Creative Conservation, 67–91. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-0721-1_4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Knight, Tiffany M. "Using Population Viability Analysis to Plan Reintroductions." In Plant Reintroduction in a Changing Climate, 155–69. Washington, DC: Island Press/Center for Resource Economics, 2012. http://dx.doi.org/10.5822/978-1-61091-183-2_9.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Possingham, Hugh. "The role of population viability analysis in forest management." In Conservation of Australia’s Forest Fauna, 35–39. P.O. Box 20, Mosman NSW 2088, Australia: Royal Zoological Society of New South Wales, 1991. http://dx.doi.org/10.7882/rzsnsw.1991.003.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Lizcano, Diego J., Jorge A. Ahumada, Akisato Nishimura, and Pablo R. Stevenson. "Population Viability Analysis of Woolly Monkeys in Western Amazonia." In The Woolly Monkey, 267–82. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4939-0697-0_15.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Bell, T. J., M. L. Bowles, and A. K. McEachern. "Projecting the Success of Plant Population Restoration with Viability Analysis." In Ecological Studies, 313–48. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-09389-4_12.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Lindenmayer, D. B., and H. P. Possingham. "Applications of Population Viability Analysis in Conservation Biology in Australia." In The GeoJournal Library, 102–10. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0343-2_11.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Pan, Wenshi. "A Population Viability Analysis for the White-Headed Langur in Nongguan Mountains." In The Population Ecology of White-Headed Langur, 213–35. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4118-0_12.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Earthworms Population viability analysis"

1

Lihui Luo, Yaonan Zhang, Yang Wang, Yonglin Wu, and Zhi Xing. "The application and analysis of Population Viability Model of Przewalski's Gazelle." In 2009 Joint Conferences on Pervasive Computing (JCPC). IEEE, 2009. http://dx.doi.org/10.1109/jcpc.2009.5420151.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Amigo, Jorge, Christopher Phillips, and Antonio Salas. "Viability of in-house datamarting approaches for population genetics analysis of snp genotypes." In Proceeding of the 2nd international workshop. New York, New York, USA: ACM Press, 2008. http://dx.doi.org/10.1145/1458449.1458465.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Thiruvengadam, Arvind, Daniel K. Carder, Mohan Krishnamurthy, and Mridul Gautam. "Comparison of Regulated and Unregulated Exhaust Emissions From a Fleet of Multi-Fuel Solid Resource Collection Vehicles." In ASME 2010 Internal Combustion Engine Division Fall Technical Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/icef2010-35053.

Повний текст джерела
Анотація:
The refuse truck segment of the heavy duty diesel vehicle population has been identified as the most fuel inefficient sector. This is predominantly due to the stop and go driving pattern associated with these trucks. Constantly evolving emissions norms are forcing large truck fleet operators to explore the economic viability of alternative fueled vehicles to combat the increasing operating costs in terms of retrofit requirements of heavy-duty diesel vehicles. The objective of this study was to determine the emissions benefits and the economic viability of introducing liquefied natural gas (LNG), and LNG-Ultra-low sulfur diesel (ULSD) dual-fueled vehicles into the solid resource collection vehicle fleet (SRCV) in the city of Los Angeles. The 12 vehicles tested in this study were part of a multi-fuel refuse truck fleet. It should be noted that these vehicles are not representative of the state-of-the-art advanced technology engines that power the present day fleets. Vehicles were exercised over the AQMD refuse truck cycle and a newly developed compaction cycle on a heavy-duty chassis dynamometer. Regulated emissions together with a whole spectrum of unregulated speciation including the analysis of 1,3 butadiene with an on-site gas chromatograph was performed. Results showed that PM distance-specific mass emissions from LNG-fueled vehicles were on an average 82% lower than diesel trucks equipped with a DPF. Chemical speciation of exhaust from different fueled trucks indicated a characteristic emissions profile specific to the fuel used in these vehicles. While emissions from LNG vehicles were characterized by carbonyls, and other lower chain hydrocarbon compounds, emissions from diesel vehicles were dominated by polyaromatic hydrocarbons (PAH) and higher chain hydrocarbons.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Tsvyatkova, Daniela. "HEREDITARY FARMING: A SYNERGY PANEL IN THE COMMON AGRICULTURAL POLICY." In AGRIBUSINESS AND RURAL AREAS - ECONOMY, INNOVATION AND GROWTH 2021. University publishing house "Science and Economics", University of Economics - Varna, 2021. http://dx.doi.org/10.36997/ara2021.280.

Повний текст джерела
Анотація:
The use of the potential of the land and the natural resources of the new generations in the separate regions are the main prerequisite and basis for the development of a certain type of multifunctional agriculture. The process of continuity should be seen as a process and not as a one-off action or event. The aim of the study is to analyze the process of inheritance in agriculture, as a socio-economic method for ensuring the viability of rural areas. The analysis is based on empirical evidence - cases from family farms and young heirs in rural areas of Bulgaria. The transfer of farm management to the next generation must be organized. Otherwise, the alternative is clear: resettlement from rural areas, a rapidly aging population and insufficient young people to enter the sector. Recognizing the importance of continuity, the Common Agricultural Policy provides training and funding to encourage young people to engage in agricultural activities.
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Garcia, Alfonso, Trevor Place, Michael Holm, Jennifer Sargent, and Andrew Oliver. "Pipeline Sludge Sampling for Assessing Internal Corrosion Threat." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33113.

Повний текст джерела
Анотація:
Internal corrosion sometimes occurs under deposits of solid particles on the bottom of transmission pipelines. The solids trap water with soluble products and other nutrients which can support the development of microbial communities and may lead to Microbiologically Influenced Corrosion (MIC). Corrosion processes associated with the metabolic activities of specific bacteria have been discussed elsewhere, but the simple presence of large microbial populations may increase the risk of internal corrosion owing to the ability of biofilms to extract and concentrate water at the pipe floor. As a method to monitor the internal corrosion threat in transmission pipelines and recommend mitigating activities for corrosion management, reliable microbial content and corrosion activity correlations are desired. Sludge samples have been obtained from cleaning pigs at the pipe trap and analyzed using Biological Activity Reaction Test (BART™) (or serial dilution test), Dean-Stark analysis, XRD and EDX. These tests provide information about certain bacterial populations, water / solid / hydrocarbon content, and crystalline/elemental composition of these solids, respectively. Despite best efforts, bacterial population/activity of pipeline sludge samples exhibit high variability and are difficult to correlate to actual internal corrosion in a pipeline. Considering that bacterial populations in pipeline sludge may be a meaningful representation of the internal corrosion threat to a transmission pipeline, a more rigorous approach on the sludge sampling procedure is necessary to improve the accuracy and reliability of the bacterial assays. It is also important to control such variables as storage temperature of the samples, exposure to air, and storage duration prior to enumeration — as these may affect the viability of the sample and enumeration results. This report presents historical pipeline sludge analysis data and suggests a method to evaluate data containing high variability. Practical recommendations to reduce data variability through handling and storage of sludge samples are also discussed.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Grad, Michael, Lubomir Smilenov, David Brenner, and Daniel Attinger. "Characterization of Switching Time and Cell Stress in a Gravity-Driven Microfluidic Cell Sorter Based on Hydrodynamic Switching." In ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels collocated with 3rd Joint US-European Fluids Engineering Summer Meeting. ASMEDC, 2010. http://dx.doi.org/10.1115/fedsm-icnmm2010-30977.

Повний текст джерела
Анотація:
In this work we describe the control and characterization of the switching time and hydrodynamic stress in a microfluidic cell sorter. The device was designed to sort small (<1000) populations of live cells in buffer solution labeled with standard bio-markers such as live dyes or green fluorescent protein (GFP). Sorting occurs through a hydrodynamic switching technique where high-speed solenoid valves control a sheath flow used to steer sorted cells away from the unsorted bulk population. The device is constructed from a reusable hard plastic polymethylmethacrylate (PMMA) chip machined with 127μm × 50μm microchannels and sealed with adhesive tape. Open reservoirs in the chip facilitate pipette access, standard microscope visualization, and a simple disassembly and cleaning procedure. The sorting frequency of this type of device is typically limited by the hydrodynamic switching time. Here, we present a theoretical and numerical analysis of the device switching time. These results show that the sorter switching time t is practically limited by the velocity of the flow and the characteristic length between inlet and outlet channels. We validate this theoretical result with experimental data obtained from flow visualizations, along with experiments conducted to evaluate the repeatability of the hydrodynamic switching scheme and the survival rate of sorted fibroblast cells Manually operated, the sorting frequencies were approximately 10 cells per minute, with switching time constants of approximately 130ms. Current throughput is limited by this switching time to approximately 450 cells per minute. Automation can increase the velocity and reduce the spacing between cells, thereby increasing throughput by at least an order of magnitude. The cell sorter was then tested by manually sorting 100 beads in 7 minutes, and 30 cells in less than 3 minutes, and was successfully used in the framework of a study on the bystander effect occurring during cell irradiation. Experiments with Trypan Blue dye verified that cell viability was maintained during the sorting process.
Стилі APA, Harvard, Vancouver, ISO та ін.
7

ATKOCIUNIENĖ, Vilma, Alvydas ALEKSANDRAVIČIUS, and Romualdas ZEMECKIS. "Public Policy Impact on Prosperity and Resilience of Farms and Agricultural Companies: Lithuanian Case Study." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.128.

Повний текст джерела
Анотація:
The CAP support is mostly focused on the technological modernization of farms, linked with production intensification, and weakly focused on the farms prosperity and resilience. As a result farmers and managers of agricultural companies are only a slightly motivated to produce added value and high quality food products, to use short food supply chains addressing constantly changing consumer needs, or to pay much attention on issues related to climate change. The paper findings are based on the Lithuanian case study carried out as a part of the international research project “Rethinking the links between farm modernization, rural development and resilience in a world of increasing demands and finite resources” (RETHINK). The Lithuanian case study was determining farmers’ behaviour and causal factors in decision-making. The research based on the positive research paradigm, case study, content and descriptive analysis, empirical study methods (answers of two groups of experts experts-professionals and experts-farmers), logical and systematical reasoning, graphic presentation, abstracts and other methods. The present paper is examining the impact of political factors on prosperity and resilience on farms and agricultural companies. The political factors have the highest impact for prosperity of the farms and agricultural companies in Lithuania (as compared to the technical – entrepreneurial, ethical - social factors, and intangible values). The support from the EU and the national funds is not fully in line with the current concept of farms’ modernization and agricultural innovation. The public policy influence on the competitiveness of the agricultural sector is more strengthening than weakening. The results show the main elements that farmers believe should be included in the new concept of rural prosperity, as well as the main strategies adopted to reach prosperity divided into the five sub dimensions: development of the rural social infrastructure and implementation of information technologies; strong self-governance, social awareness and partnership; high culture of life and communication; rural employment and job creation in rural areas, population welfare; economic and social viability, ecology and environmental security of the countryside.
Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Earthworms Population viability analysis"

1

Jager, Yetta, Mark S. Bevelhimer, and Douglas L. Peterson. Population viability analysis of the Endangered shortnose sturgeon. Office of Scientific and Technical Information (OSTI), July 2011. http://dx.doi.org/10.2172/1047606.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Life history, ecology and population viability analysis of the Independence Lake strain Lahontan Cutthroat trout. US Geological Survey, 2006. http://dx.doi.org/10.3133/70179541.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Також вас можуть зацікавити розширені добірки на тему "Earthworms Population viability analysis" для конкретних типів джерел:
Статті в журналах Дисертації Книги
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії