scholarly journals Biocide Treatment of Invasive Signal Crayfish: Successes, Failures and Lessons Learned

Diversity ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 29 ◽  
Author(s):  
Stephanie Peay ◽  
Stein Johnsen ◽  
Colin Bean ◽  
Alison Dunn ◽  
Roar Sandodden ◽  
...  
Keyword(s):  
Habitat Complexity ◽  
Open Water ◽  
Project Planning ◽  
Lessons Learned ◽  
Synthetic Pyrethroid ◽  
Aquatic Communities ◽  
Project Leadership ◽  
Signal Crayfish ◽  
Native Crayfish ◽  
Biocide Treatment

Signal crayfish, as an invasive alien species in Europe, have caused impacts on aquatic communities and losses of native crayfish. Eradication of recently established populations may be possible in small ponds (<2.5 ha) and short lengths of small watercourses using a nonselective biocide. Between 2004 and 2012, a total of 13 sites in the U.K. were assessed for suitability. Six were treated with natural pyrethrum and crayfish were successfully eradicated from three. In Norway, five sites were assessed and two sites were treated with a synthetic pyrethroid, cypermethrin, both successfully. In Sweden, three sites were treated with another synthetic pyrethroid, deltamethrin, all successfully. Defining the likely extent of population was critical in determining the feasibility of treatment, as well as the ability to treat the whole population effectively. Important constraints on projects included site size, habitat complexity, environmental risks, cooperation of landowners and funding availability. Successful projects were manageably small, had good project leadership, had cooperation from stakeholders, had access to resources and were carried out within one to three years. Factors influencing success included treating beyond the likely maximum geographical extent of the population and taking care to dose the treated area thoroughly (open water, plus the banks, margins, inflows and outflows). Recommendations are given on assessing the feasibility of biocide treatments and project-planning.

MANAGEMENT OF UNCERTAINTY AND RISK IN OFFSHORE PETROLEUM DEVELOPMENT

2002 ◽  
Vol 42 (1) ◽  
pp. 113
Author(s):  
P. Behrenbruch
Keyword(s):  
Development Planning ◽  
Project Planning ◽  
Lessons Learned ◽  
Capital Expenditures ◽  
Remedial Action ◽  
Case Histories ◽  
Wide Range ◽  
Petroleum Development ◽  
Petroleum Reserves ◽  
Management Of Uncertainty

Uncertainty in petroleum development projects is most often associated with petroleum reserves. It is the limited amount of subsurface data typically available during the time of development planning that creates this situation. Risks are associated not only with reservoir uncertainty but also with wells and production facilities. Risks for offshore projects, as compared to those onshore, are further compounded by very large capital expenditures and less flexibility in catering for subsurface surprises, or remedial action in case of engineering blunders.These concepts are illustrated using case histories of successful and failed projects. Lessons learned from these and other projects are then summarised and processes for uncertainty and risk management are outlined. Risk and uncertainty cover a wide range of issues, and relate to geoscience, reservoir engineering, well technology, facilities engineering, operations, and project planning and evaluation.

scholarly journals Effect of habitat complexity on the distribution of Ceriodaphnia quadrangula (O. F. Müller, 1785) (Crustacea: Cladocera) in a deep lake

2010 ◽  
Vol 47 (2) ◽  
pp. 51-58 ◽  
Author(s):  
Małgorzata Adamczuk
Keyword(s):  
Surface Layer ◽  
Brood Size ◽  
Habitat Complexity ◽  
Littoral Zone ◽  
Open Water ◽  
The Other ◽  
Pelagic Zone ◽  
Submerged Vegetation ◽  
Deep Lake ◽  
Ceriodaphnia Quadrangula

Effect of habitat complexity on the distribution of Ceriodaphnia quadrangula (O. F. Müller, 1785) (Crustacea: Cladocera) in a deep lake The aim of the study was to compare the density, body size, and reproduction of the cladoceran, Ceriodaphnia quadrangula (O. F. Müller, 1785), in various habitats of Lake Piaseczno (38.8 m deep) in eastern Poland. Samples were taken in the littoral zone (from emergent and submerged vegetation, as well as from open water and the surface layer of water above submerged vegetation) and in the pelagic zone (from the epilimnion, metalimnion, and hypolimnion). The results show that C. quadrangula prefers the littoral zone, as it achieves there much higher values of the analysed variables than in the pelagic zone. The number and size of adults (including ovigerous females), as well as brood size achieved equally high values in emergent and submerged vegetation, and much lower values in the other habitats (including pelagic ones). Juveniles also preferred to stay in the littoral zone but displayed clear preferences to none of the habitats.

Relaxed attitude towards spreading of alien crayfish species affects protection of native crayfish species: case studies and lessons learnt from a Fennoscandian viewpoint

2020 ◽  
Vol 25 (1) ◽  
pp. 39-46
Author(s):  
Japo Jussila ◽  
Lennart Edsman
Keyword(s):  
Competitive Advantage ◽  
Pacifastacus Leniusculus ◽  
Astacus Astacus ◽  
Signal Crayfish ◽  
Aphanomyces Astaci ◽  
Noble Crayfish ◽  
Native Crayfish ◽  
Chronic Carrier ◽  
Highly Virulent ◽  
Crayfish Species

Abstract The spreading of the alien signal crayfish (Pacifastacus leniusculus) is posing an ongoing threat to native European crayfish species in Fennoscandia, like the native noble crayfish (Astacus astacus). The signal crayfish is commonly a chronic carrier of the crayfish plague (Aphanomyces astaci), thus, in addition to being more competitive than noble crayfish, it also has a competitive advantage in this disease over the noble crayfish. The challenges rising from the introduction of the alien signal crayfish to Sweden, Finland and finally also Norway, are similar in nature. The licensed and unlicensed spreading of this species also has a similar history in these countries. In this paper we describe some of the patters of the spread of alien signal crayfish and highlight the detrimental nature of an alien crayfish, accompanied by a highly virulent disease, to native Fennoscandian crayfish and also to native Fennoscandian ecosystems. A halt to the further spreading of alien signal crayfish in Fennoscandia is the only means to ensure successful conservation outcomes for the noble crayfish.

scholarly journals The role of macrozoobenthos and periphyton in bioindication of water resources quality in Uzbekistan

2021 ◽  
Vol 265 ◽  
pp. 01016
Author(s):  
Abdulla Kurbanov ◽  
Natalie Titova ◽  
Zuri Mustaphaeva ◽  
Nargis Atabaeva
Keyword(s):  
Water Resources ◽  
Open Water ◽  
Anthropogenic Pollution ◽  
Aquatic Communities ◽  
Ecological Structure ◽  
Composition And Structure ◽  
Settlement Site

The material was collected during the open water period from March to the end of November 2019. In the period of our research in the basin of the Chirchik river (Boshkizylsay river, Ugam river (pre-settlement site), Chirchik river) were discovered several types of zoobenthos and periphyton. The monitoring was carried out on 8 stations, in total of 64 quantitative samples of macrozoobenthos and periphyton were taken. Anthropogenic pollution causes changes in the composition and structure of aquatic communities, expressed in the change of dominant complexes of organisms, the simplification of the ecological structure, the appearance of highly saprobic species in the composition of the dominants.

Creating an Online Image Database

2013 ◽  
pp. 188-204
Author(s):  
Claudia A. Perry ◽  
Walter E. Valero
Keyword(s):  
Real Life ◽  
Project Planning ◽  
Lessons Learned ◽  
Software Support ◽  
Emerging Trends ◽  
Library And Information Studies ◽  
Information Studies ◽  
Technical Issues ◽  
Queens College

The concept of experiential learning is particularly useful when students are required to create database entries as part of an ongoing, real-life, online experience. A METRO grant in 2005 resulted in an opportunity to use students to create a CONTENTdm database, which, with the continued software support from METRO, has continued and evolved until the present. This case study chapter describes the experience of both faculty and students in the Queens College Graduate School of Library and Information Studies course entitled “Introduction to Digital Imaging.” Sections include a review of related literature, the background, technical issues, and implications for teaching, project procedures and workflow, successes and lessons learned, challenges, next steps, and emerging trends. Of particular interest is the use of out of copyright postcards and the metadata that has resulted from intensive student study and evaluation of the data contained on these cards. Those contemplating a digitization project of their own will be able to learn much about best practices, project planning, management, and the advantages/disadvantages of the CONTENTdm software.

Commercial-Grade Item Dedication for Nuclear Safety-Related Application

2010 ◽  
Author(s):  
Yao-Tung Hsu ◽  
Ming-Huei Chen
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Personal Responsibility ◽  
Control Device ◽  
Project Planning ◽  
Nuclear Safety ◽  
Lessons Learned ◽  
Commercial Grade ◽  
Equipment Qualification

This paper describes the general practice and lessons learned from Commercial-Grade Item dedication for nuclear safety-related system applications in Taiwan. The dedication process qualified the commercial off-the-shelf components to be applied as basic components. In past fifteen years, Institute of Nuclear Energy Research (INER) has actively performed the dedication service to help local nuclear power plants solve their procurement problems of nuclear grade items, due to reduced availability of qualified suppliers and/or obsolete issues of qualified components. The Scope of dedication includes material, electrical and mechanical components located in mild and harsh environment. Thousands of components such as piping, fitting, breaker, relay, motor, and control device etc., have already been dedicated to and successfully used in local nuclear power plants. The Commercial-Grade Item dedication process is based on EPRI documentations. Besides, the technical evaluation and equipment qualification are included during the dedication process. The requirements for equipment qualification are described in IEEE standards. Although the codes and standards for dedication in Taiwan refer to those in USA, the challenges may happen due to different regulators, utility, manufacture’s quality culture, and personal responsibility. The key to successful dedication will be dependent on the well-defined component requirements and good project planning. This paper introduces the self-reliant experiences in dedication and economic benefit to local nuclear power plants.

Corporate Memory: Lessons Learned from Innovative Human Factors Researchers

1996 ◽  
Vol 40 (4) ◽  
pp. 274-277
Author(s):  
Robert J. B. Hutton ◽  
Gary Klein
Keyword(s):  
Project Management ◽  
Problem Solving ◽  
Human Factors ◽  
Air Force ◽  
Lessons Learned ◽  
Research Projects ◽  
Management Skills ◽  
Project Leadership ◽  
Decision Method ◽  
Corporate Memory

Lessons learned from experienced researchers can provide an invaluable resource for any organization. The purpose of this project was to interview successful researchers from the Armstrong Laboratory (AL/HEA) at Wright-Patterson AFB to learn from some of their successful projects. The ultimate goals of the project were threefold: to provide AL/HEA with an alternative way to capture and describe the successes of their researchers; to identify themes that emerged from these projects regarding researchers' problem-solving, project leadership, and project management skills; and finally, to provide recommendations to the organization which would promote and support ways to increase opportunities for successful projects. Eleven interviews were conducted. Each of the researchers was interviewed about a project that had provided some concrete benefit to the Air Force. We used a form of the Critical Decision method to elicit 15 accounts. Several themes were identified that characterized the research projects, and recommendations were made to encourage the initiative of laboratory personnel and increase opportunities for successes.

Application of Context Sensitive Design for Meihe Freeway

2012 ◽  
Vol 178-181 ◽  
pp. 1202-1208
Author(s):  
Xu Tao
Keyword(s):  
Environmental Protection ◽  
Public Interest ◽  
Project Planning ◽  
Lessons Learned ◽  
Stakeholder Values ◽  
Ecological Balance ◽  
Context Sensitive ◽  
Transportation Projects ◽  
National Environment ◽  
Highway Project

Increasing public interest and concern about transportation projects impacts on the national environment. Context Sensitive Design (CSD) is among the most significant concepts to emerge in highway project planning, design, and construction in recent years. However, CSD needs to be felt its way to effectual practice through a multitude of trials and misconceptions in China. The objective of paper is to summarize activities and finding in the CSD field during Meihe Freeway construction. Meihe Freeway is a successful CSD project. As a Meihe CSD team number, the author presents the CSD approach, addresses context sensitive solutions to CSD issues with flexible concepts. The paper illustrates issues and lessons learned from CSD alignment design with consideration of constrained budget, stakeholder values, ecological balance and environmental protection.

scholarly journals Progress on water data integration and distribution: a summary of select US Geological Survey data systems

2015 ◽  
Vol 18 (2) ◽  
pp. 226-237 ◽  
Author(s):  
David Blodgett ◽  
Jessica Lucido ◽  
James Kreft
Keyword(s):  
Design Patterns ◽  
Open Water ◽  
Lessons Learned ◽  
Geological Survey ◽  
Quality Data ◽  
Web Pages ◽  
Data Systems ◽  
Water Quality Data ◽  
Data Infrastructure ◽  
The Status

Critical water-resources issues ranging from flood response to water scarcity make access to integrated water information, services, tools, and models essential. Since 1995 when the first water data web pages went online, the US Geological Survey has been at the forefront of water data distribution and integration. Today, real-time and historical streamflow observations are available via web pages and a variety of web service interfaces. The Survey has built partnerships with Federal and State agencies to integrate hydrologic data providing continuous observations of surface and groundwater, temporally discrete water-quality data, groundwater well logs, aquatic biology data, water availability and use information, and tools to help characterize the landscape for modeling. In this paper, we summarize the status and design patterns implemented for selected data systems. We describe how these systems contribute to a US Federal Open Water Data Initiative and present some gaps and lessons learned that apply to global hydroinformatics data infrastructure.

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