scholarly journals Evaluation of the Distribution of Shrimp Species Found in Southern Benin Through the Lake Nokoué-ocean Complex

2021 ◽  
Author(s):  
Sèlomè Wilfried Sintondji ◽  
Amoussou Sylvain Gozingan ◽  
Zacharie Sohou ◽  
Matthieu Taymans ◽  
Katrijn Baetens ◽  
...  
Keyword(s):  
Life Cycle ◽  
Literature Review ◽  
Temporal Dynamics ◽  
Life Cycles ◽  
The European Union ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Favorable Environment ◽  
Spatio Temporal ◽  
Southern Benin

Abstract BackgroundThe export of shrimp to the European Union was one of the mainstays of the Beninese economy. It is an income-generating activity for the populations living along lake Nokoué. The lack of a fisheries management strategy has caused a drastic decline in shrimp production in lake Nokoué since 2003. To remedy this problem, it is necessary to hypothesize on their spatio-temporal dynamics in the lake Nokoué-Cotonou channel complex. This is investigated by combining a literature review on their life cycles and habitat suitability with spatio-temporal evolution of salinity obtained from in-situ observations.ResultsThe literature review recognizes the presence in southern Benin of species of the genus Macrobrachium, Atya and Desmocaris (seven, two and one respectively) and five species of marine shrimps belonging to three genera: the genus Penaeus, the genus Holthuispenaeopsis and the genus Parapenaeus. From information on the ecology and physical environment it is shown that adults of the species of the genus Macrobrachium and genus Atya have a favorable environment in lake Nokoué from August to November, their larvae must remain in the lake from December to June to ensure their survival. The species of the genus Desmocaris, which carry out their entire life cycle in fresh water, can stay in lake Nokoué from August to November. The species of the genus Penaeus can find a favorable environment in lake Nokoué from December to June but their larvae can only survive in the sea. Finally, the species of the genus Holthuispenaeopsis and Parapenaeus spend their entire life cycle at sea.ConclusionsThis work allows understanding contrasted life cycles of shrimp’s genera Macrobrachium and Atya compared to Penaeus in a complex ecosystem characterized by strong saline variation. This research allows to predict the presence or absence of shrimp’s genera Macrobrachium, Atya, Desmocaris and Penaeus in a lake system, on the basis of salinity distribution, for a sustainable management of their exploitation.

scholarly journals The Circular Economy: An Exploratory Case Study from the Paper and Retail Industries

2021 ◽  
Vol 7 (4) ◽  
pp. 379-394
Author(s):  
Peter Jones ◽  
Daphne Comfort
Keyword(s):  
Economic Growth ◽  
Life Cycle ◽  
Literature Review ◽  
Circular Economy ◽  
Paper Industry ◽  
Business World ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Exploratory Case Study

Recent decades have witnessed increasing interest in the concept of the circular economy within both the business world and political circles. The circular economy spans the entire life cycle of products from product design through production, marketing, and consumption, to waste management, recycling, and re-use, and enthusiasm for putting the concept into practice has been identified across different sectors of the economy. This exploratory case study reviews how some of the leading companies in the paper and retail industries, have publicly addressed the circular economy. The case study outlines the nature of the circular economy, provides a cameo literature review of published work on the circular economy, describes the approach adopted for the case study, reports the findings of the review of how the leading companies in the paper and retail industries have addressed the circular economy, and discusses some wider issues. Keywords: circular economy, case study, paper industry, retail industry, greenwash, economic growth

Epoxidation of juvenile hormone was a key innovation improving insect reproductive fitness

2021 ◽  
Vol 118 (45) ◽  
pp. e2109381118
Author(s):  
Marcela Nouzova ◽  
Marten J. Edwards ◽  
Veronika Michalkova ◽  
Cesar E. Ramirez ◽  
Marnie Ruiz ◽  
...  
Keyword(s):  
Life Cycle ◽  
Juvenile Hormone ◽  
Reproductive Performance ◽  
Reproductive Fitness ◽  
Fitness Cost ◽  
Evolutionary Significance ◽  
Methyl Farnesoate ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Key Innovation

Methyl farnesoate (MF) plays hormonal regulatory roles in crustaceans. An epoxidated form of MF, known as juvenile hormone (JH), controls metamorphosis and stimulates reproduction in insects. To address the evolutionary significance of MF epoxidation, we generated mosquitoes completely lacking either of the two enzymes that catalyze the last steps of MF/JH biosynthesis and epoxidation, respectively: the JH acid methyltransferase (JHAMT) and the P450 epoxidase CYP15 (EPOX). jhamt−/− larvae lacking both MF and JH died at the onset of metamorphosis. Strikingly, epox−/− mutants, which synthesized MF but no JH, completed the entire life cycle. While epox−/− adults were fertile, the reproductive performance of both sexes was dramatically reduced. Our results suggest that although MF can substitute for the absence of JH in mosquitoes, it is with a significant fitness cost. We propose that MF can fulfill most roles of JH, but its epoxidation to JH was a key innovation providing insects with a reproductive advantage.

Rice metabolic regulatory network spanning its entire life cycle

2021 ◽  
Author(s):  
Chenkun Yang ◽  
Shuangqian Shen ◽  
Shen Zhou ◽  
Yufei Li ◽  
Yuyuan Mao ◽  
...  
Keyword(s):  
Life Cycle ◽  
Regulatory Network ◽  
Entire Life ◽  
Entire Life Cycle

Assessment of driving quality and its impact on changes in the technical condition of self-driving cars

2020 ◽  
pp. 24-26
Keyword(s):  
Artificial Intelligence ◽  
Life Cycle ◽  
Computer Technology ◽  
Technical Condition ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Machine Maintenance ◽  
Current Task ◽  
Self Driving Cars

The article describes the current task of developing and improving existing technologies for machine maintenance throughout the entire life cycle. The use of modern achievements in the field of computer technology, digitization of information, as well as the development of artificial intelligence technologies, will allow you to get new scientific and engineering results aimed at managing the technical condition of machines in operation.

scholarly journals Assessment of the Logistic System of Fuel Life Cycle Using the LCA Method

2016 ◽  
Vol 20 (3) ◽  
pp. 125-134
Author(s):  
Aleksander Marek ◽  
Piotr Kardasz ◽  
Mikolaj Karpinski ◽  
Volodymyr Pohrebennyk
Keyword(s):  
Life Cycle ◽  
Rapeseed Oil ◽  
Functional Unit ◽  
Operation Time ◽  
Diesel Oil ◽  
Butyl Alcohol ◽  
Oil Refining ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Management Processes

AbstractThis paper presents the logistic system of fuel life cycle, covering diesel oil and the mixture of rapeseed oil and butanol (2:3 ratio), using the Life-Cycle Assessment (LCA) method. This method is a technique in the field of management processes with a view to assessing the potential environmental hazards. Our intention was to compare the energy consumption needed to produce each of the test fuels and emissions of selected substances generated during ithe production process. The study involved 10,000 liters of diesel and the same amount of rapeseed oil and butanol mixture (2:3 ratio). On the basis of measurements the following results were obtained. To produce a functional unit of diesel oil (i.e. 10,000 liters) it is necessary to extract 58.8 m3 of crude oil. The entire life cycle covering the consumption of 10,000 liters of diesel consumes 475.668 GJ of energy and causes the emission to air of the following substances: 235.376 kg of COx, 944.921 kg of NOx, 83.287 kg of SOx. In the ease of a functional unit, to produce a mixture of rapeseed oil and butanol (2:3 ratio) 10,000 kg of rapeseed and 20,350 kg of straw should be used. The entire life cycle of 10,000 liters of a mixture of rapeseed oil and butyl alcohol (2:3 ratio) absorbs 370.616 GJ of energy, while emitting the following air pollutants: 105.14832 kg of COx, 920.03124 kg of NOx, 0.162 kg of SOx. Analysis of the results leads to the conclusion that it is oil refining which is the most energy-intensive and polluting process in the life cycle of diesel. The process consumes 41.4 GJ of energy, and causes a significant emission of sulfur oxides (50 kg). In the production of fuel that is a mixture of rapeseed oil and butyl alcohol (2:3 ratio), rape production is the most energy-intensive manufacturing process is (absorbs 53.856 GJ of energy). This is due to the long operation time of the farm tractor and combine harvester. The operation of these machines leads also to the emission of a significant amount of pollution in the form of COx (2.664 kg) and NOx (23.31 kg).

scholarly journals Reproductive diapause in Nysius huttoni White (Heteroptera Lygaeidae)

2002 ◽  
Vol 55 ◽  
pp. 308-311
Author(s):  
X.Z. He ◽  
Q. Wang ◽  
A. Carpenter
Keyword(s):  
Life Cycle ◽  
Immature Stages ◽  
Life Stages ◽  
Reproductive Diapause ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Adult Females ◽  
Critical Photoperiod

The induction of reproductive diapause of Nysius huttoni was studied in the laboratory at 20 1C and 60 10 RH under a series of photoperiod regimes 168 h 1410 h 1212 h and 1014 h lightdark Reproductive diapause was considered to have occurred if females failed to lay eggs for 50 days after emergence The sensitivity of different life stages to diapauseinducing photoperiods varied When newly emerged females whose immature stages had been reared at 168 h were transferred to 1014 h and 1212 h 467 and 793 of them entered reproductive diapause respectively However when fifth instar nymphs were transferred from 168 h to 1014 h and 1212 h 100 of adult females entered reproductive diapause If the entire life cycle was maintained at 1014 h and 1212 h 667 and 400 of females entered reproductive diapause respectively The critical photoperiod for reproductive diapause was estimated to lie between 1311 h and 135105 h

scholarly journals Rock ‘n’ use of CO2: carbon footprint of carbon capture and utilization by mineralization

2020 ◽  
Vol 4 (9) ◽  
pp. 4482-4496 ◽  
Author(s):  
Hesam Ostovari ◽  
André Sternberg ◽  
André Bardow
Keyword(s):  
Life Cycle ◽  
Carbon Footprint ◽  
Carbon Capture ◽  
Climate Impacts ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Carbon Capture And Utilization ◽  
Permanent Storage ◽  
N Use

Our LCA-based assessment showed that all considered CCU technologies for mineralization can reduce climate impacts over the entire life cycle due to the permanent storage of CO2 and the credit for substituting conventional products.

scholarly journals Big data technology in construction

2019 ◽  
Vol 97 ◽  
pp. 01032 ◽  
Author(s):  
Nikolay Garyaev ◽  
Venera Garyaeva
Keyword(s):  
Cloud Computing ◽  
Big Data ◽  
Life Cycle ◽  
Construction Industry ◽  
Smart Cities ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Intelligent Buildings ◽  
Big Data Technology

The article presents the results of the analysis of the use of large amounts of data in the construction industry, new trends such as BIM, IOT, cloud computing, intelligent buildings and smart cities with great prospects for application. These problems are related to the presence of huge amounts of data produced by the construction industry during the entire life cycle of a building, which are not fully used for optimizing processes and making decisions in construction.

scholarly journals Life Cycle Work: A Process Study of the Emergence and Performance of Life Cycle Practice

2020 ◽  
pp. 108602661989397 ◽  
Author(s):  
Hanna Nilsson-Lindén ◽  
Andreas Diedrich ◽  
Henrikke Baumann
Keyword(s):  
Environmental Management ◽  
Life Cycle ◽  
Life Cycle Management ◽  
Entire Life ◽  
Entire Life Cycle ◽  
Organization And Management ◽  
Corporate Environmental Management ◽  
Process Study ◽  
And Performance ◽  
Over Time

Life cycle management (LCM) is a concept that goes beyond traditional corporate environmental management, due to its focus on a product’s entire life cycle. The spread of such concepts is usually understood in terms of processes of “diffusion,” whereby ideas spread over time by some inexplicable force. However, diffusion has proven less adequate to describe how ideas spreads in practice. Here, we address this oversight by studying the emergence and performance of what we refer to as life cycle practices. Drawing on an analysis of the development of a sustainability portfolio within a globally operating manufacturing company, we illustrate the kinds of life cycle work involved in dealing with local activities and interests, connecting activities and interests into action nets, performing life cycle practices, and spreading the life cycle idea. Finally, we discuss implications of life cycle work for research in the field of organization and management studies and for LCM research.

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