scholarly journals Radiofrequency identification (RFID) reveals long-distance flight and homing abilities of the stingless bee Melipona fasciculata

Apidologie ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 240-253 ◽  
Author(s):  
Patrícia Nunes-Silva ◽  
Luciano Costa ◽  
Alistair John Campbell ◽  
Helder Arruda ◽  
Felipe Andres Leon Contrera ◽  
...  
Keyword(s):  
Management Strategies ◽  
Stingless Bee ◽  
Rfid Technology ◽  
Long Distance ◽  
Forest Reserve ◽  
Return Rates ◽  
Bee Conservation ◽  
Flight Capacity ◽  
Radiofrequency Identification ◽  
Translocation Experiments

AbstractDetermining bee flight capacity is crucial for developing management strategies for bee conservation and/or crop pollination and purposes. In this study, we determined the flight distance of the stingless bee Melipona fasciculata using the radiofrequency identification (RFID) technology. For this, we conducted two translocation experiments using workers equipped with RFID microsensors: (1) release of bees at seven distances between 100 and 3000 m from experimental colonies in Belém, Brazil, and (2) at six distances between 1500 and 10,000 m at Carajás National Forest Reserve. Return rates of workers were negatively correlated to release distance, with typical flight distances of 2 km, but a maximum homing distance of 10 km. Use of RFID tags revealed how past experiments may have greatly underestimated homing abilities of stingless bees.

scholarly journals High Temperatures Decrease the Flight Capacity of Diaphorina citri Kuwayama (Hemiptera: Liviidae)

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 394
Author(s):  
Carlos A. Antolinez ◽  
Tobias Moyneur ◽  
Xavier Martini ◽  
Monique J. Rivera
Keyword(s):  
Relative Humidity ◽  
High Temperatures ◽  
Insect Pest ◽  
The United States ◽  
Diaphorina Citri ◽  
Long Distance ◽  
Flight Duration ◽  
Custom Made ◽  
Flight Capacity ◽  
Low Humidity

Diaphorina citri Kuwayama (Hemiptera: Liviidae), commonly known as Asian citrus psyllid (ACP), is an invasive insect pest and the vector of the bacterium causing Huanglongbing (HLB), a lethal disease of citrus. In the United States, ACP has been established in all citrus-producing zones, all of which have different environmental conditions. The spread of ACP and, more importantly, HLB, has progressed differently depending on the state, with more rapid spread in Florida and Texas than in California. Climatic variations between the regions are likely a strong factor in the difference in the rate of spread. Despite this, it is unknown how the flight capacity of D. citri is influenced by high temperatures (>30 °C) and subsequently, low humidity experienced in California but not in Texas or Florida. In this study, by using a custom-made, temperature-controlled flight mill arena, we assessed the effect of high temperatures on the flight capacity and flight propensity of D. citri under low (20–40%) and high (76–90%) relative humidity conditions. We found that temperature and humidity influence the propensity to engage in short or long-distance flight events. Psyllids exposed to temperatures above 43 °C only performed short flights (˂60 s), and a high relative humidity significantly decrease the proportion of long flights (≥60 s) at 26 and 40 °C. The flight capacity for insects who engaged in short and long flights was significantly affected by temperature but not by humidity. For long flyers, temperature (in the 26–43 °C range) was negatively correlated with distance flown and flight duration. The most favorable temperature for long dispersion was 26 °C, with suboptimal temperatures in the range of 32–37 °C and the least favorable temperatures at 40 and 43 °C. In conclusion, D. citri is able to fly in a broad range of temperatures and efficiently fly in high and low humidity. However, temperatures above 40 °C, similar to those experienced in semi-arid environments like Southern California or Arizona, are detrimental for its flight capacity.

scholarly journals A Fast Hybrid Strategy-Based RFID Tag Identification Protocol

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xinyan Wang
Keyword(s):  
Rfid Technology ◽  
Identification Performance ◽  
Total Response ◽  
Tag Identification ◽  
Hybrid Strategy ◽  
Rfid Tag ◽  
Rfid Systems ◽  
Radiofrequency Identification ◽  
Critical Problems ◽  
Transmission And Reflection

Tag collision is one of the critical problems in radiofrequency identification (RFID) technology which can be widely used to identify objects using tag attachment automatically. Through the transmission and reflection of wireless radiofrequency signals, noncontact identification is realized. However, when multiple tags respond to the reader simultaneously, a collision occurs, significantly degrading the identification performance of RFID systems. To tackle the tag collisions, we propose a fast hybrid strategy-based RFID anticollision (FHS-RAC) protocol. Based on the conventional query tree algorithm, the proposed FHS-RAC makes full use of collision bits and the total response bits to achieve the faster tag identification. Extensive simulations and experiments verify the feasibility and effectiveness of our proposed scheme.

scholarly journals College Students’ Use of Relational Management Strategies in Email in Long-Distance and Geographically Close Relationships

2008 ◽  
Vol 13 (2) ◽  
pp. 381-404 ◽  
Author(s):  
Amy Janan Johnson ◽  
Michel M. Haigh ◽  
Jennifer A. H. Becker ◽  
Elizabeth A. Craig ◽  
Shelley Wigley
Keyword(s):  
College Students ◽  
Close Relationships ◽  
Management Strategies ◽  
Long Distance ◽  
Relational Management

scholarly journals Online retail returns management

2016 ◽  
Vol 46 (6/7) ◽  
pp. 584-605 ◽  
Author(s):  
Michael Bernon ◽  
John Cullen ◽  
Jonathan Gorst
Keyword(s):  
Management Strategies ◽  
Management Process ◽  
Online Retail ◽  
Content Type ◽  
Return Rates ◽  
Qualitative And Quantitative ◽  
Online Sales ◽  
Management Processes ◽  
Managerial Implications ◽  
Returns Management

Purpose – With the rapid growth of consumer sales being fulfilled through omni-channel retailing, the purpose of this paper is to explore the subsequent impact on the levels of consumer retail returns experienced through online sales and the emergent returns management strategies being affected by retailers in relation to network configuration and returns management processes. Design/methodology/approach – The authors uses a mixed methods approach from an interpretive perspective. It is appropriate to describe the approach in terms of convergent design, since the authors have collected both qualitative and quantitative data. Findings – Return rates for online retailing can be double those for stores, while return levels for “considered purchases” remain similar. The findings suggest that omni-channel returns management has yet to fully mature and the authors find challenges for network design and returns processes in offering a seamless solution. Research limitations/implications – For practitioners the authors identify a number of challenges and offer insights to improve performance in returns management process, while for academic colleagues the authors propose a number of avenues for further research both in the qualitative and quantitative fields. Originality/value – While a significant body of extant literature exists, in researching the generalized retail returns management process this paper make a contribution by addressing the emergent managerial implications of omni-channel retail returns.

Do utility corridors affect movements of small terrestrial fauna?

2009 ◽  
Vol 36 (6) ◽  
pp. 488 ◽  
Author(s):  
Susan M. Carthew ◽  
Briony Horner ◽  
Katherine M. W. Jones
Keyword(s):  
South Australia ◽  
Native Forest ◽  
Vertebrate Species ◽  
Long Distance ◽  
Forest Reserve ◽  
Linear Forest ◽  
Significant Difference ◽  
Future Work ◽  
The Impact ◽  
Bassiana Duperreyi

Linear forest clearings created by utility corridors have the potential to fragment landscapes, create edge effects and isolate populations of plants and animals. Here, we investigated the impact of utility corridors on small terrestrial fauna inhabiting Nangwarry Native Forest Reserve, south of Penola in south-eastern South Australia. Twelve sites straddling linear clearings of two widths (1.5 and 4.2 m) were surveyed over 2 years with 53 traps arranged as five transects at each site. This resulted in a total of 933 captures of 18 vertebrate species, including four amphibians, eight reptiles and six mammals. Propensity for capture near edges v. interiors, distances moved between recaptures and willingness to cross linear clearings varied among species, and was not related to taxa groups. For example, the small skink Bassiana duperreyi was extremely mobile and crossed tracks regularly. At the other extreme, the frog Neobatrachus pictus was more likely to be caught on interior transects and was never recorded moving between captures. The small dasyurid Antechinus flavipes was the most regularly caught species, and made both short- (<50 m) and long-distance (>1500 m) movements, with longer moves made by dispersing juveniles. Movements by this species often involved clearing crossings, although these were more likely when time between recaptures was longer, particularly for females. However, the overall rate of crossings for this species was not different from that expected if movements were random. In conclusion, the relatively narrow utility corridors studied here did not appear to affect the mobility of the majority of vertebrates significantly, with approximately half of the 85 movements recorded being of animals crossing a clearing, and no significant difference between the proportion crossing the wider (4.2 m) and the narrower (1.5 m) clearings. The present study is one of only a handful investigating movement patterns in reptiles and amphibians, particularly in relation to disturbances. However, sample sizes were small for some species, and future work should focus on those species that look to be either particularly mobile or sedentary, and encompass responses to the wider (up to 15 m) permanent tracks in the region.

Prestige and Prejudice: The Role of Long Distance Big Game Hunting as an Optimal Foraging Decision

2012 ◽  
Vol 77 (1) ◽  
pp. 168-178 ◽  
Author(s):  
Deanna N. Grimstead
Keyword(s):  
Central Place ◽  
Central Place Foraging ◽  
Economic Returns ◽  
Long Distance ◽  
Return Rates ◽  
Small Game ◽  
Game Hunting ◽  
Big Game Hunting ◽  
Foraging Decision

AbstractSignaling theory has much to offer anthropology and archaeology, which is in part why there is an increasing number of applications and healthy debates surrounding how best to apply it. One of those debates surrounds whether big game hunting is a costly signal or simply an aspect of efficient foraging. Grimstead (2010) contributed to this debate by showing that long-distance big-game hunting (greater than 100 km roundtrip) produces higher caloric return rates than does local small-game hunting, despite increased costs of travel and transport for the former. Whittaker and Carpenter (this issue) present a model that also suggests long-distance big-game hunting produces higher economic returns than local foraging but only up to about 50 km. This paper provides further details on the tenets of the Grimstead (2010) paper in response to criticisms by Whittaker and Carpenter (this issue), and then uses a previously published central place foraging model (Cannon 2003) to show that another model also shows long-distance big-game hunting over a distance greater than 100 kilometers roundtrip produces higher returns than local foraging.

scholarly journals A REVIEW PAPER ON POTATO MOP-TOP VIRUS (PMTV): OCCURRENCE, PROPERTIES AND MANAGEMENT

2016 ◽  
Vol 1 (3) ◽  
pp. 129 ◽  
Author(s):  
Aqleem Abbas ◽  
Meysam Madadi
Keyword(s):  
Coat Protein ◽  
Management Strategies ◽  
Triple Gene Block ◽  
Economic Losses ◽  
Tuber Quality ◽  
Potato Tubers ◽  
Long Distance ◽  
Gene Block ◽  
Potato Mop Top Virus ◽  
Important Disease

Potato mop-top virus (PMTV) is a plant pathogenic virus that affects potatoes. The virus was initially reported from Germany but now it has spread throughout Europe, Asia, South America and North America. It is responsible for spraing symptoms (brown arcs/lines, blemishes, and rings) on potato tubers and yellow chevrons or mopping (Shortened internodes) in the leaves and stems of plants grown from infected potato tubers. PMTV causes huge economic losses due to poor tuber quality. It is an important disease in the potato growing areas of the world. PMTV is tubular rod shape and has a single stranded positive sense RNA (+ssRNA) tripartite genome. RNA 1 encodes RdRp (viral RNA-dependent RNA polymerase). Coat protein (20kDa) and a larger protein (91kDa) is encoded by RNA2. RNA2 encodes larger protein (91 kDa) by read through (RT) of the amber termination codon of the coat protein. There are three conserved moldular sets of genes known as triple gene block (TGB) which are coded by RNA3. These TGBs are involved in cell to cell or long distance movement of PMTV. In nature, PMTV is vectored and transmitted by a soil born pathogen (Plasmodiophorid (Spongospora subterranean f.sp. subterranean abbreviated as ‘Sss’) that itself causes the powdery scab disease on tubers. The disease caused by PMTV and Sss are favored by cool and damp conditions. PMTV remain in spore balls of Sss for several years even if the potato is not grown in the field. There are no efficient means to manage the virus nor its vector in an infested field, therefore, preventive measures are essential. Since PMTV along with its vector is causing important disease of potato, so understanding its molecular, biological, physical properties and management strategies is very important.

scholarly journals Longevity of Radiofrequency Identification Device Microchips in Citrus Trees

HortScience ◽  
2010 ◽  
Vol 45 (3) ◽  
pp. 451-452 ◽  
Author(s):  
Kim D. Bowman
Keyword(s):  
Plant Growth ◽  
Woody Plant ◽  
Field Research ◽  
Rfid Technology ◽  
Growth And Survival ◽  
Radiofrequency Identification ◽  
Term Identification ◽  
Over Time ◽  
Citrus Trees

Long-term identification of individual plants in the field is an important part of many types of research. In a previous report, we described methods for using implanted radiofrequency identification device (RFID) microchips to tag citrus trees for field research. This report provides an update on the RFID technology for use in plants, the effect of implanted chips on long-term plant growth, and survival of the microchips over time. The microchips were found to have no significant effect on plant health and growth, and most microchips continued to work well through the first 6 years after implantation. Implanted RFID microchips appear useful for long-term tagging of citrus and other woody plant species.

scholarly journals Emergence of African Swine Fever in Poland (2014–2021). Successes and Failures in Disease Eradication

Agriculture ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 738
Author(s):  
Grzegorz Woźniakowski ◽  
Zygmunt Pejsak ◽  
Artur Jabłoński
Keyword(s):  
Wild Boar ◽  
Management Strategies ◽  
African Swine Fever ◽  
Economic Loss ◽  
Wild Boar Population ◽  
Long Distance ◽  
Domestic Pig ◽  
Effective Measure ◽  
Disease Eradication ◽  
Pig Production

African swine fever (ASF) in Poland has been a major concern for pig production for the last seven years. The main constrains in ASF eradication in Poland are due to the high density of wild boar in ASF-affected areas of the country. Other factors, responsible for long-distance ASF spread to new regions of the country, are mainly related to human-mediated activity and lack of awareness of the potential disease threat to pig production. In the case of pig holdings, the only effective measure of ASF prevention is strict implementation of biosecurity rules. Despite many efforts to implement these measures, the disease occurred in a number of voivodeships, poviats and counties of Poland, primarily in eastern Poland; however, starting from 2019, also in the western part of the country. Further recommendations to eradicate ASF in Poland or at least to minimize the economic loss caused by ASF in pig production include effective wild boar population management strategies along with the implementation of strict biosecurity measures. The observations from the last seven years of ASF epizootic in Poland clearly indicate that the disease could not have been effectively controlled in wild boar population and could only be restricted in domestic pig population following severe biosecurity rules. As for ASF spread control in wild boar population, the measures applied in other EU countries include active wild boar carcass search and disposal along with sanitary and reduction hunting. These measures have also been shown non-effective. The only solution for future sustainable pig production in Poland seems to be strict collaboration between pig producers, veterinary inspection, and hunting associations.

scholarly journals Chipless-RFID: A Review and Recent Developments

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3385 ◽  
Author(s):  
Herrojo ◽  
Paredes ◽  
Mata-Contreras ◽  
Martín
Keyword(s):  
Integrated Circuits ◽  
Data Storage ◽  
Low Cost ◽  
Rfid Tags ◽  
Rfid Technology ◽  
Advantages And Disadvantages ◽  
Chipless Rfid ◽  
Recent Developments ◽  
Radiofrequency Identification ◽  
Application Specific

In this paper, a review of the state-of-the-art chipless radiofrequency identification (RFID) technology is carried out. This recent technology may provide low cost tags as long as these tags are not equipped with application specific integrated circuits (ASICs). Nevertheless, chipless-RFID presents a series of technological challenges that have been addressed by different research groups in the last decade. One of these challenges is to increase the data storage capacity of tags, in order to be competitive with optical barcodes, or even with chip-based RFID tags. Thus, the main aim of this paper is to properly clarify the advantages and disadvantages of chipless-RFID technology. Moreover, since the coding information is an important aspect in such technology, the different coding techniques, as well as the main figures of merit used to compare different chipless-RFID tags, will be analyzed.

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