scholarly journals Potential threat of the international aquarium fish trade to silver arawana Osteoglossum bicirrhosum in the Peruvian Amazon

Oryx ◽  
2006 ◽  
Vol 40 (2) ◽  
pp. 152-160 ◽  
Author(s):  
Marie-Annick Moreau ◽  
Oliver T. Coomes
Keyword(s):  
Experimental Studies ◽  
Rural Poor ◽  
Peruvian Amazon ◽  
Potential Threat ◽  
Aquarium Fish ◽  
Foreign Earnings ◽  
Catch And Release ◽  
Part Time ◽  
Management Schemes ◽  
Government Statistics

Silver arawana Osteoglossum bicirrhosum are increasingly popular on the international aquarium fish market, but the routine killing of mouth brooding adults to collect juveniles for the trade may threaten wild populations. We describe the aquarium trade and fishery for silver arawana in the Peruvian Amazon. This is the first such report on the species for South America, and is based on field interviews with trade participants and fishermen, and on a review of government statistics. The regional trade is large, expanding and valuable (over 1 million juveniles worth USD 560,000 exported in 2001), of considerable economic importance to the rural poor, and in urgent need of research, monitoring and management. Outright bans on arawana fishing are likely to be ineffective and to destabilize an export fishery that provides significant part-time employment for the rural poor and substantial foreign earnings. Experimental studies are called for that compare the impacts on arawana yields of alternate fishing techniques, such as catch and release of brooding males, as a basis for developing more effective management schemes in Amazonia.

scholarly journals Determining Firebrand Generation Rate Using Physics-Based Modelling from Experimental Studies through Inverse Analysis

Fire ◽  
2022 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Amila Wickramasinghe ◽  
Nazmul Khan ◽  
Khalid Moinuddin
Keyword(s):  
Wind Velocity ◽  
Forest Fire ◽  
Inverse Analysis ◽  
Vegetation Type ◽  
Experimental Studies ◽  
Generation Rate ◽  
Fuel Load ◽  
Potential Threat ◽  
Collection Data ◽  
Vegetation Species

Firebrand spotting is a potential threat to people and infrastructure, which is difficult to predict and becomes more significant when the size of a fire and intensity increases. To conduct realistic physics-based modeling with firebrand transport, the firebrand generation data such as numbers, size, and shape of the firebrands are needed. Broadly, the firebrand generation depends on atmospheric conditions, wind velocity and vegetation species. However, there is no experimental study that has considered all these factors although they are available separately in some experimental studies. Moreover, the experimental studies have firebrand collection data, not generation data. In this study, we have conducted a series of physics-based simulations on a trial-and-error basis to reproduce the experimental collection data, which is called an inverse analysis. Once the generation data was determined from the simulation, we applied the interpolation technique to calibrate the effects of wind velocity, relative humidity, and vegetation species. First, we simulated Douglas-fir (Pseudotsuga menziesii) tree-burning and quantified firebrand generation against the tree burning experiment conducted at the National Institute of Standards and Technology (NIST). Then, we applied the same technique to a prescribed forest fire experiment conducted in the Pinelands National Reserve (PNR) of New Jersey, the USA. The simulations were conducted with the experimental data of fuel load, humidity, temperature, and wind velocity to ensure that the field conditions are replicated in the experiments. The firebrand generation rate was found to be 3.22 pcs/MW/s (pcs-number of firebrands pieces) from the single tree burning and 4.18 pcs/MW/s in the forest fire model. This finding was complemented with the effects of wind, vegetation type, and fuel moisture content to quantify the firebrand generation rate.

Aquarium fish exploitation in western Amazonia: conservation issues in Peru

2007 ◽  
Vol 34 (1) ◽  
pp. 12-22 ◽  
Author(s):  
MARIE-ANNICK MOREAU ◽  
OLIVER T. COOMES
Keyword(s):  
Amazon Basin ◽  
Cash Income ◽  
Limited Information ◽  
Supply Networks ◽  
Aquarium Fish ◽  
Fish Collection ◽  
Fish Exploitation ◽  
Government Statistics ◽  
The City ◽  
European Markets

The Amazon basin is a key supplier of wild freshwater fishes to the multi-billion US$ global aquarium market, yet limited information exists on the organization of the regional trade, its importance to local economies or conservation impacts. Through field interviews and review of government statistics, this paper describes the state of the industry in Peru, reporting on the scale and value of the trade, the nature of the fishery and the characteristics and roles of key actors in regional supply networks. An economically important industry is revealed, with 28 firms officially exporting over nine million fishes worth US$ 2.5 million to 24 countries in 2001, and involving fish species from 36 families transported from rainforest catchments up to 1100 km distant from the export centre of Iquitos. Most fish are however collected close to the city, with 10 species representing >70% of trade volume. Some 10 000 people earn income from the trade, among them many rural poor who depend on aquarium fish collection as a primary or supplementary source of cash income. The industry is currently undergoing an important transition towards supplying new Asian and European markets, increasing exports of species biologically unsuited to heavy exploitation as a result, and highlighting the conservation need for improved knowledge and management of the trade in Amazonia.

scholarly journals Rethinking Fuelwood: People, Policy and the Anatomy of a Charcoal Supply Chain in a Decentralizing Peru

Forests ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 533 ◽  
Author(s):  
Aoife Bennett ◽  
Peter Cronkleton ◽  
Mary Menton ◽  
Yadvinder Malhi
Keyword(s):  
Developing Countries ◽  
Supply Chain ◽  
Mixed Methods ◽  
Supply Chains ◽  
Rural Poor ◽  
Commodity Chain ◽  
Peruvian Amazon ◽  
Mixed Methods Approach ◽  
National Market ◽  
Multi Level

In Peru, as in many developing countries, charcoal is an important source of fuel. We examine the commercial charcoal commodity chain from its production in Ucayali, in the Peruvian Amazon, to its sale in the national market. Using a mixed-methods approach, we look at the actors involved in the commodity chain and their relationships, including the distribution of benefits along the chain. We outline the obstacles and opportunities for a more equitable charcoal supply chain within a multi-level governance context. The results show that charcoal provides an important livelihood for most of the actors along the supply chain, including rural poor and women. We find that the decentralisation process in Peru has implications for the formalisation of charcoal supply chains, a traditionally informal, particularly related to multi-level institutional obstacles to equitable commerce. This results in inequity in the supply chain, which persecutes the poorest participants and supports the most powerful actors.

scholarly journals Believe It or Not – No Support for an Effect of Providing Explanatory or Threat-Related Information on Conspiracy Theories’ Credibility

2021 ◽  
Author(s):  
Marcel Meuer ◽  
Aileen Oeberst ◽  
Roland Imhoff
Keyword(s):  
Experimental Studies ◽  
Past Research ◽  
Specific Information ◽  
Potential Threat ◽  
Conspiracy Theories ◽  
Related Information

Past research suggests that certain content features of conspiracy theories may foster their credibility. In two experimental studies (N = 293), we examined whether conspiracy theories that explicitly offer a broad explanation for the respective phenomena and/or identify potential threat posed by conspirators are granted more credibility than conspiracy theories lacking such information. Furthermore, we tested whether people with a pronounced predisposition to believe in conspiracies are particularly susceptible to such information. To this end, participants judged the credibility of four conspiracy theories which varied in the provision of explanatory and threat-related information. Interestingly, the specific type of information provided was not decisive. Instead, credibility judgments were only driven by people’s predisposition to believe in conspiracies. Findings suggest that there is no mechanistic, almost automatic effect of merely adding specific information and highlight the relevance of people’s conspiratorial mindset for the evaluation of conspiracy theories.

scholarly journals Describing the impacts of COVID-19 on the labor market in Japan until June 2020

2021 ◽  
Author(s):  
Taiyo Fukai ◽  
Hidehiko Ichimura ◽  
Keisuke Kawata
Keyword(s):  
Labor Market ◽  
Employment Status ◽  
Large Scale ◽  
Comparison Group ◽  
Average Treatment Effect ◽  
Restaurant Industry ◽  
Education Status ◽  
Part Time ◽  
Government Statistics ◽  
The Impact

AbstractThe Labor Force Survey, a large-scale government statistics, and the causal forest algorithm are used to estimate the group average treatment effect of the COVID-19 on the employment status for each month from January to June 2020. We find that (1) because of the seasonality in employment status at monthly level, whether we use January 2020 as the base month for comparison, as done in most of the studies or whether we use the same month last year as the base comparison group makes a large difference; (2) whether we include those who are absent from work among the employed or not makes a large difference in the measure of the impact of COVID-19 and its changes; (3) if we use the employment measure which does not include those who are absent from work among the employed, 25–30% among the employed are adversely affected and that 10% of the employed experienced more than 10% decline in employment probability in April, 2020; (4) those who are the most affected by the COVID-19 are those who are unemployed or work part-time in the hotel and restaurant industry and service occupations; (5) in addition, younger and female respondents are more affected than are older and male respondents; and (6) we observe no clear differences in the impacts of COVID-19 with respect to living location, education status, and firm size among the most affected.

3-D reconstruction and analysis of mammalian mitotic spindle structure

1992 ◽  
Vol 50 (1) ◽  
pp. 578-579
Author(s):  
Kent McDonald ◽  
David Mastronarde ◽  
Rubai Ding ◽  
Eileen O'Toole ◽  
J. Richard McIntosh
Keyword(s):  
Cross Sections ◽  
Mitotic Spindle ◽  
Experimental Studies ◽  
Video Camera ◽  
Three Dimensions ◽  
Mitotic Spindles ◽  
Black And White ◽  
Reconstruction Methods ◽  
Spindle Structure ◽  
Tissue Culture Line

Mammalian spindles are generally large and may contain over a thousand microtubules (MTs). For this reason they are difficult to reconstruct in three dimensions and many researchers have chosen to study the smaller and simpler spindles of lower eukaryotes. Nevertheless, the mammalian spindle is used for many experimental studies and it would be useful to know its detailed structure.We have been using serial cross sections and computer reconstruction methods to analyze MT distributions in mitotic spindles of PtK cells, a mammalian tissue culture line. Images from EM negatives are digtized on a light box by a Dage MTI video camera containing a black and white Saticon tube. The signal is digitized by a Parallax 1280 graphics device in a MicroVax III computer. Microtubules are digitized at a magnification such that each is 10-12 pixels in diameter.

Inservice training for part-time dental faculty

1981 ◽  
Vol 45 (2) ◽  
pp. 68-70
Author(s):  
GL Powell ◽  
JE Barrett
Keyword(s):  
Inservice Training ◽  
Part Time

Exploring Barriers to Doctoral Education in Communication Sciences and Disorders: Insights From Practicing Professionals

2020 ◽  
Vol 5 (6) ◽  
pp. 1552-1563
Author(s):  
Denise A. Tucker ◽  
Mary V. Compton ◽  
Sarah J. Allen ◽  
Robert Mayo ◽  
Celia Hooper ◽  
...  
Keyword(s):  
Doctoral Students ◽  
Online Survey ◽  
Academic Research ◽  
Doctoral Degree ◽  
Full Time ◽  
Doctoral Study ◽  
Doctoral Research ◽  
Part Time ◽  
Advance Research ◽  
Doctor Of Philosophy

Purpose The intended purpose of this research note is to share the findings of a needs assessment online survey of speech and hearing professionals practicing in North Carolina to explore their interest in pursuing a research-focused PhD in Communication Sciences and Disorders (CSD) and to document their perceptions of barriers to pursing a PhD in CSD. In view of the well-documented shortage of doctor of philosophy (PhD) faculty to attract, retain, and mentor doctoral students to advance research and to prepare future speech and hearing professionals, CSD faculty must assess the needs, perceptions, and barriers prospective students encounter when considering pursuing a doctoral research degree in CSD. Method The article describes the results of a survey of 242 speech and hearing professionals to investigate their interest in obtaining an academic research-focused PhD in CSD and to solicit their perceived barriers to pursuing a research doctoral degree in CSD. Results Two thirds of the respondents (63.6%) reported that they had considered pursuing a PhD in CSD. Desire for knowledge, desire to teach, and work advancement were the top reasons given for pursuing a PhD in CSD. Eighty-two percent of respondents had no interest in traditional full-time study. Forty-two percent of respondents indicated that they would be interested in part-time and distance doctoral study. The barriers of time, distance, and money emerged as those most frequently identified barriers by respondents. Conclusion The implications inform higher education faculty on how they can best address the needs of an untapped pool of prospective doctoral students in CSD.

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