scholarly journals Identifying knowledge gaps for successful restorative aquaculture of Ostrea edulis: a bibliometric analysis

2022 ◽  
Vol 1 ◽  
pp. 103
Author(s):  
Camilla Bertolini ◽  
Roberto Pastres
Keyword(s):  
Restoration Ecology ◽  
Web Of Science ◽  
Environmental Changes ◽  
Limiting Factors ◽  
Ostrea Edulis ◽  
Research Directions ◽  
North West ◽  
Main Research ◽  
The North ◽  
Global And Local

Background: Active restoration is necessary to enhance the recovery of Ostrea edulis reefs, which contribute to many ecosystem services. Restoration can be integrated within aquaculture practices, bringing positive environmental changes while maximising space utilisation. The restoration project MAREA (MAtchmaking Restoration Ecology and Aquaculture) aims to bring back O. edulis in the North-West Adriatic addressing the feasibility of its cultivation. Both successful restoration and sustainable aquaculture require a thorough understanding of the ecological needs, as the requirements of both activities need to be harmonized. Therefore, one of the preliminary activities before embarking on the pilot was the completion of a thorough literature review to identify research directions and gaps required for ‘restorative aquaculture’, aiming to gather the most up to date O. edulis knowledge on a global and local scale.  Methods: Internet (Web of Science, Scopus, Google scholar) and physical resources (libraries) were searched for all available global and local knowledge on O. edulis. Bibliometrix was used to identify the main research topics using keywords, titles, and abstracts analyses. Studies were then manually screened and summarised to extract knowledge specific to restoration and aquaculture. Results: While restoration studies are recent, evidence for the loss of this species and potential causes (and solutions) have been discussed since the end of the 19th century. While diseases were a leading cause for reef loss, substratum limitation appears to be one of the leading limiting factors for both restoration and aquaculture of O. edulis, and was already mentioned in the early texts that were found. Conclusions: The review highlighted that restoration success and aquaculture feasibility depend upon the crucial stage of settlement. The project ‘MAREA’ will therefore increase its focus on this stage, both in terms of timing, location, and materials for settlement plates placement.

scholarly journals Identifying knowledge gaps for successful restorative aquaculture of Ostrea edulis: a bibliometric analysis

2021 ◽  
Vol 1 ◽  
pp. 103
Author(s):  
Camilla Bertolini ◽  
Roberto Pastres
Keyword(s):  
Ecosystem Services ◽  
Restoration Ecology ◽  
Environmental Changes ◽  
Larval Settlement ◽  
Limiting Factors ◽  
Ostrea Edulis ◽  
North West ◽  
Main Research ◽  
The North ◽  
Global And Local

Background: Active restoration is necessary to enhance the recovery of Ostrea edulis reefs, which contribute to many ecosystem services. Restoration can be integrated within aquaculture practices, bringing positive environmental changes while maximising space utilisation. The restoration project MAREA (MAtchmaking Restoration Ecology and Aquaculture) aims to bring back O. edulis in the North-West Adriatic addressing the feasibility of its cultivation. Both successful restoration and sustainable aquaculture require a thorough understanding of the ecological needs, as the requirements of both activities (e.g. to maximise ecosystem services, seed production, settlement for maintaining population and for starting a new culture) need to be harmonized. Therefore, one of the preliminary activities before embarking on the pilot was the completion of a thorough literature review to identify research directions and gaps required for ‘restorative aquaculture’, aiming to gather the most up to date O. edulis knowledge on a global and local scale.  Methods: Internet (Web of Science, Scopus, Google scholar) and physical resources (libraries) were searched for all available global and local knowledge on O. edulis. Bibliometrix was used to identify the main research topics using keywords, titles and abstracts analyses. Studies were then manually screened and summarised to extract knowledge specific to restoration and aquaculture.   Results: While restoration studies are recent, evidence for the loss of this species and potential causes (and solutions) have been discussed since the end of the 19th century. While diseases was a leading cause for reef loss, substratum limitation appears to be one of the leading limiting factors for both restoration and aquaculture of O. edulis, and was already mentioned in the early texts that were found. Conclusions: Information regarding the best materials, location and timing for larval settlement were collated in this review, and the focus of MAREA will be shifted to the crucial stage of settlement.

scholarly journals Epidemiological Situation on Tick-Borne Borreliosis in the Russian Federation in 2019 Compared to the Period of 2002–2018

2020 ◽  
pp. 131-138
Author(s):  
S. A. Rudakova ◽  
N. A. Pen’evskaya ◽  
A. I. Blokh ◽  
D. A. Savel’ev ◽  
O. E. Teslova ◽  
...  
Keyword(s):  
Russian Federation ◽  
Federal District ◽  
Effective Control ◽  
North Caucasus ◽  
North West ◽  
Main Research ◽  
The North ◽  
Federal Districts ◽  
The Russian Federation ◽  
Epidemiological Situation

Objective: to analyze the epidemiological situation on Ixodidae tick-borne borreliosis in the Russian Federation in 2019 in comparison with the period of 2002–2018.Materials and methods. The paper uses the data contained in Form No. 2 of the state statistical reporting for 2002–2019 and information obtained by the Reference Center for Monitoring Borreliosis of the Omsk Research Institute of Natural Focal Infections from 74 constituent entities of Russia in 2019. The main research method is epidemiological one with the use of modern information technologies.Results and discussion. In Russia, 8048 cases of tick-borne borreliosis (Lyme disease – LD) were recorded (5.48 0/0000) in 2019. The actual indicators of the LD incidence for the whole country and federal districts (FD) in 2019 were within the confidence limits predicted with linear regression based on the study of the dynamics of the epidemic process in 2002–2018 in the vast majority of cases. A steady upward trend in the LD incidence was observed during 2002–2019 in the Central Federal District due to 10 out of 18 entities (Moscow, Belgorod, Lipetsk, Moscow, Bryansk, Voronezh, Kursk, Ryazan, Tambov, Tula regions); in the Southern Federal District because of the Krasnodar Territory and the Volgograd Region; in the North Caucasus Federal District – because of the Stavropol Territory. Despite the fact that a downward trend in the incidence of LD has been established over the past 18 years in the North-West, Volga and Ural Federal Districts, in some subjects of these regions a trend towards an aggravation of the epidemiological situation is observed (the Komi Republic and Chuvashia, Penza Region). In the absence of a pronounced tendency to change in the incidence rate of LD in the Siberian and Far Eastern Federal Districts, Kemerovo Region-Kuzbass, the Republic of Tuva and the Trans-Baikal Territory where a growing trend has been identified require special attention. In the Ural and Siberian Federal Districts, the share of non-erythema forms among laboratory-confirmed cases of LD was higher than in other regions, which merits further study of the genome-specific features of borrelia populations and their carriers. Effective control of the LD epidemiological situation in Russia is possible provided that the control is improved and maintained, and the capacity of preventive measures and zoological-entomological monitoring of the activity and structure of the natural foci of LD is enhanced in the entities with the long-term tendency towards increase in the incidence of the disease. 

scholarly journals A performance management model addressing human factors in the North West provincial administration

2019 ◽  
Vol 17 ◽  
Author(s):  
Kezell Klinck ◽  
Sonia Swanepoel
Keyword(s):  
Service Delivery ◽  
Human Factors ◽  
Performance Management ◽  
Performance Improvement ◽  
North West ◽  
Main Research ◽  
The North ◽  
Managerial Implications ◽  
Provincial Administration ◽  
Improved Performance

Orientation: The article investigated factors from several perspectives using human resources-related issues of governance, legislation, regulation, organisation, administration and communication, workplace sociology variables pertaining to social and psychological relationships and several other factors that have an impact on the complex matrix of determinants for performance improvement in the public service.Research purpose: This article explored the human factors linked to the performance management (PM) processes and its impact on the effectiveness of service delivery in the North West provincial administration (NWPA). The article isolated the strengths and weaknesses of the system of performance assessment from the human relations perspective, technical usage, the structural–organisational and the strategic perspectives, uniformity, legislative compliance and other possibilities envisaged and emerging.Motivation for the study: The study would deliver a successful and carefully crafted PM model that could be used to remedy the current performance situation through improved and effective communication channels, as well as ongoing feedback, leading to a more productive and motivated workforce. This would ultimately yield improved service delivery for the citizens of the North West Province.Research approach/design and method: To answer the main research questions, sub-questions and objectives of this study, several participants (permanent employees and managers) found in the departments within the NWPA had to respond to diverse instruments of inquiry (questionnaires, interview schedules, expert, operational, strategic and grass-roots opinion, etc.). The study took a sequential mixed-methods approach where interpretivist (qualitative) and positivist (quantitative) approaches were applied as the philosophy and descriptive statistics were used.Main findings: The main findings highlighted all the human factors that mitigated against performance improvement in the NWPA. From the evidence gathered, some departments exhibited problematic manager–subordinate relationships, lack of training, no proper feedback, low staff morale leading to low job satisfaction, lack of leadership as well as broken channels of communication.Practical/managerial implications: The findings revealed that it is important for the NWPA management to undertake the necessary efforts in order to adapt a new strategy and comprehensive model for improved performance, which would ultimately lead towards efficient and effective service delivery in the North West Province.Contribution/value-add: This paper explores the salient human factors to be taken into consideration during performance management in the North West Provincial Administration.

scholarly journals The Trends in Research on the Effects of Biochar on Soil

2020 ◽  
Vol 12 (18) ◽  
pp. 7810
Author(s):  
Taotao Yan ◽  
Jianhui Xue ◽  
Zhidong Zhou ◽  
Yongbo Wu
Keyword(s):  
Web Of Science ◽  
Annual Number ◽  
Future Research ◽  
Research Directions ◽  
Main Research ◽  
Reference Information ◽  
Subject Categories ◽  
The Subject ◽  
Basic Characteristics ◽  
Number Of Publications

The present study used bibliometric methods to analyze the literature regarding the biochar effects on soil that are included in the Web of Science Core Collection database and quantified the annual number of publications in the field and distribution of publications. Using CiteSpace as a visual analytic software for the literature, the distribution of the subject categories, author collaborations, institution collaborations, international (regional) collaborations, and cocitation and keyword clustering were analyzed. The results showed the basic characteristics of the literature related to the effects of biochar on soil. Furthermore, the main research powers in this field were identified. Then, we recognized the main intellectual base in the domain of biochar effects on soil. Meanwhile, this paper revealed the research hotspots and trends of this field. Furthermore, focuses of future research in this field are discussed. The present study quantitatively and objectively describes the research status and trends of biochar effects on soil from the bibliometric perspective to promote in-depth research in this field and provide reference information for scholars in the relevant fields to refine their research directions, address specific scientific issues, and help scholars to seek/establish relevant collaborations in their fields of interests.

scholarly journals The quantitative prediction of tectonic fractures of Longmaxi formation in Dingshan area, southeastern Sichuan Basin

2019 ◽  
Vol 23 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Jiatong Xie ◽  
Qirong Qin ◽  
Cunhui Fan ◽  
Dongfeng Hu ◽  
Hu Li
Keyword(s):  
Oil And Gas ◽  
Rock Fracture ◽  
Quantitative Prediction ◽  
Fracture Density ◽  
Longmaxi Formation ◽  
North West ◽  
Main Research ◽  
Oil And Gas Exploration ◽  
The North ◽  
Fracture Development

Tectonic fractures are a significant factor for production of the Longmaxi formation in Dingshan area. The analyse of the distribution and development degree of tectonic fractures is the main research method in present-day. Based on the data of field outcrops and borehole core, the new method-binary method is put forward by rock fracture and energy value to decide tectonic fracture development. According to the method the fitting formula is offered between the relation of the value of rock fracture, energy and the fracture density. Compared the fracture density predictive value and the observed value of 15 wells, all wells relative error less than 25%. The prediction results are accurate. According to the fitting formula of fracture development and distribution in the study area are obtained. The results show that the fracture density is high as a whole of the Longmaxi formation in Dingshan area. Whole shows by south east to gradually reduce the trend of the north west. Supported the future of the oil and gas exploration to provide geological basis and guidance in Dingshan area.

scholarly journals The annual growth and reproductive cycle of the ascidian Dendrodoa grossularia (van Beneden)

1954 ◽  
Vol 33 (1) ◽  
pp. 33-48 ◽  
Author(s):  
R. H. Millar
Keyword(s):  
Annual Cycle ◽  
East Coast ◽  
The Other ◽  
Botryllus Schlosseri ◽  
Ostrea Edulis ◽  
Histological Changes ◽  
North West ◽  
Crepidula Fornicata ◽  
The North ◽  
Speci Mens

This paper is the second of a series dealing with the annual cycle of growth andreproduction in British ascidians; a previous paper (Millar, 1952) dealt with the speciesDiplosoma listerianum (Milne Edwards), Ciona intestinalis (Linnaeus),Ascidiella aspersa (Muller), andBotryllus schlosseri (Pallas)The present investigation is concerned with the growth, the course of sexual reproduction and establishment of new generations, and the histological changes in the gonad throughout the year, in the ascidianDendrodoa grossularia (family Styelidae).Samples were examined from two widely separated localities: Fambridge in the River Crouch, Essex; and Farland Point, Isle of Cumbrae, in the Firth of Clyde. The specimens from Essex were dredged from a depth of about 2 m. (below L.W.O.S.T.), and were attached to the empty shells of the European oyster,Ostrea edulis L. and to the shells ofCrepidula fornicata L. The speci-mens from the Firth of Clydewere attached to stones on sheltered parts of the shore. The animals here extended over a zone of the shore from about Chart Datum+ 2.5 ft. (0.76 m.) to about Chart Datum+ 7.5 ft. (2.29 m.): Only in very sheltered positions, such as under large boulders, did Dendrodoa occur in abundance. The two habitats were thus very different in nature, one being sublittoral on the south-east coast of Britain and the other being littoral on the north-west coast. The value of comparisons is limited by the different nature of the conditions to which the sublittoral and the littoral populations were exposed.The observations on growth in the Clyde extended over most of 1951 and 1952, and nineteen samples were taken.

scholarly journals Development of Sustainable Thinking by Information Literacy

2021 ◽  
Vol 13 (3) ◽  
pp. 1287
Author(s):  
Angela Repanovici ◽  
Cristina Salcă Rotaru ◽  
Cristinel Murzea
Keyword(s):  
Information Literacy ◽  
Web Of Science ◽  
Scientific Information ◽  
Close Correlation ◽  
Research Direction ◽  
Research Directions ◽  
Main Research ◽  
Qualitative Research Study ◽  
New Research ◽  
Scientometric Study

Developing the sustainable thinking of students is an important preoccupation of specialists, teachers, and civil society. Information literacy represents the development of students’ skills to search, identify, evaluate, and ethically use scientific information. Is there a connection between sustainable thinking (ST) and information literacy (IL)? Through a scientometric study in the Web of Science (WOS) database, the authors identify clusters of keywords, analyze the articles identified in WOS, and identify the main research directions and the existing concepts. At the same time, a qualitative research study is performed regarding the opinions of students who participated in the IL class. By corroborating and interpreting the results obtained by the two previously mentioned research, the authors demonstrate a close correlation between the two, thus creating an extended map of these concepts, a limited map of the concepts used, and a theoretical map of the concepts. The connection between information literacy and the development of ST is demonstrated, thus creating the premise for a new research direction.

The Climate, Environment and Industries of Stone Age Greece: Part III

1968 ◽  
Vol 33 ◽  
pp. 1-29 ◽  
Author(s):  
E. S. Higgs ◽  
C. Vita-Finzi ◽  
D. R. Harris ◽  
A. E. Fagg ◽  
S. Bottema
Keyword(s):  
Environmental Changes ◽  
Structural Factors ◽  
The South ◽  
Human Occupation ◽  
North West ◽  
North East ◽  
The North ◽  
Last Glaciation ◽  
South West ◽  
Maximum Elevation

In the second article of this series, brief mention was made of a cave at Kastritsa, near Lake Ioannina, whose talus had yielded an industry reminiscent of the last phase at the shelter of Asprochaliko. The evidence for an increase in the size of Lake Ioannina during the Last Glaciation was also outlined. The purpose of this paper is to consider the concomitant environmental changes in relation to the evidence for human occupation.Lake Ioannina lies at 469 metres above sea-level. To the north-east stands the Mitsikeli ridge, with a maximum elevation of 1,810 metres and separated from the Pindus range by the gorge of the upper Arakhthos (fig. 1). To the south-west lies the Tomarokhoria plateau, which in places rises to over 1,900 metres. The basin, a typical polje, is cradled by limestones which range in age from the Upper Triassic to the Upper Eocene. The Flysch of the Pindus borders it on the south-east. The lake lies along the axis of the Perama syncline, which runs north-west-south-east parallel to the Mitsikeli anticline and the Stavraki anticline; faulting is common. The basin would seem to owe its existence primarily to structural factors, although solution doubtless contributed to its present form.

scholarly journals Pesticide knowledge and safety practices in farm workers from Tubah Sub-Division, North West Region, Cameroon

2019 ◽  
Vol 1 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Charlie C. Nguemo ◽  
Margaret Tita ◽  
Mosaad A. Abdel-Wahhab
Keyword(s):  
Human Health ◽  
Environmental Changes ◽  
Farm Workers ◽  
Safety Measures ◽  
Safety Practices ◽  
North West ◽  
The North ◽  
West Region ◽  
Outer Cover ◽  
Structured Questionnaire

This study aimed to evaluate the safety measures practiced by farmers with use of pesticides in Tubah Sub-Division. The data gathered would be useful for drafting policies related to use of pesticides to reduce its effects  on human health and the environment. This survey was carried out in November 2016 in Tubah Sub-Division, Mezam Division of the North West region of Cameroon. A structured questionnaire was administered to 120 homesteads of the study area. The results revealed that 94.2% of the farmers were untrained in pesticide safety measures, 30.8% did not observe any safety interval before consuming freshly treated crops and 25.8% did not read instructions on pesticide labels before handling. Fifty five percent of the farmers did not use any protective equipment, 79.2% practiced careless pesticide disposal, 13.3% stored pesticides in stores and 7.5% stored pesticides inside their houses. Eighty percent of the families stored their crops via hanging in the house and smoking the crops, while 10.8% stored their crops in sealed bins. Water washing followed by removing the outer cover was applied as a crop cleaning procedure prior to cooking or consumption. Major symptoms such as headache, wheezing, dizziness and skin problems were observed in the homesteads. Some environmental changes observed after application of pesticides were damage of non-target plants and disappearance of insects. It could be concluded that in Bambili, farmers lacked proper knowledge regarding safe handling and use of pesticides and the adverse effects of improper pesticide use to human health and the environment.  

SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

1990 ◽  
Vol 48 (3) ◽  
pp. 58-59
Author(s):  
Daryl A. Cornish ◽  
George L. Smit
Keyword(s):  
Morphological Characteristics ◽  
Oreochromis Mossambicus ◽  
Breeding Cycle ◽  
Limited Information ◽  
North West ◽  
The North ◽  
Sem And Tem ◽  
Sperm Development ◽  
Ultrastructural Characteristics ◽  
The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

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