INSECTICIDE-INDUCED BEHAVIORAL RESPONSES IN TWO POPULATIONS OF ANOPHELES MACULATUS AND ANOPHELES SAWADWONGPORNI, MALARIA VECTORS IN THAILAND

2006 ◽  
Vol 22 (4) ◽  
pp. 689-698 ◽  
Author(s):  
VITHEE MUENWORN ◽  
PONGTEP AKARATANAKUL ◽  
MICHAEL J. BANGS ◽  
ATCHARIYA PARBARIPAI ◽  
THEERAPHAP CHAREONVIRIYAPHAP
Keyword(s):  
Behavioral Responses ◽  
Malaria Vectors ◽  
Two Populations

BEHAVIORAL RESPONSES TO DDT AND PYRETHROIDS BETWEEN ANOPHELES MINIMUS SPECIES A AND C, MALARIA VECTORS IN THAILAND

2005 ◽  
Vol 73 (2) ◽  
pp. 343-349 ◽  
Author(s):  
JINNAPA POTIKASIKORN ◽  
THEERAPHAP CHAREONVIRIYAPHAP ◽  
MICHAEL J. BANGS ◽  
ATCHARIYA PRABARIPAI
Keyword(s):  
Behavioral Responses ◽  
Malaria Vectors ◽  
Anopheles Minimus

Behavioral Responses of Malaria Vectors, Anopheles minimus Complex, to Three Classes of Agrochemicals in Thailand

2007 ◽  
Vol 44 (6) ◽  
pp. 1032-1039 ◽  
Author(s):  
Jinrapa Pothikasikorn ◽  
Hans Overgaard ◽  
Chitapa Ketavan ◽  
Surapon Visetson ◽  
Michael J. Bangs ◽  
...  
Keyword(s):  
Behavioral Responses ◽  
Malaria Vectors ◽  
Anopheles Minimus

scholarly journals Time of Test Periods Influence the Behavioral Responses of Anopheles minimus and Anopheles dirus (Diptera: Culicidae) to DEET

Insects ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 867
Author(s):  
Rungarun Tisgratog ◽  
Chutipong Sukkanon ◽  
Victor Arief Sugiharto ◽  
Michael J. Bangs ◽  
Theeraphap Chareonviriyaphap
Keyword(s):  
Mosquito Species ◽  
Behavioral Responses ◽  
Test System ◽  
Malaria Vectors ◽  
Anopheles Dirus ◽  
Anopheles Species ◽  
Anopheles Minimus ◽  
Significant Difference ◽  
Escape Responses ◽  
The Impact

Information on factors influencing the behavioral responses of mosquitoes to repellents is lacking and poorly understood, especially in the Anopheles species, night-biting mosquitoes. Our goal was to investigate the impact of different time periods on circadian activity and behavioral responses of two malaria vectors, Anopheles minimus and An. dirus, to 5% DEET using an excito-repellency test system. Each mosquito species was exposed to the repellent during the daytime (06.00–18.00) and nighttime (18.00–06.00), and time of observation was further divided into four 3-h intervals. Significant escape responses were observed between daytime and nighttime for An. minimus in both noncontact and contact tests. An. dirus showed statistical differences in contact irritancy escape response, whereas no significant difference was found in noncontact repellency tests. Both mosquito species showed more significantly higher escape responses when exposed to DEET during the afternoon and late in the night. This finding indicates that the time of testing may affect the behavioral responses of mosquitoes to repellents, especially in An. minimus and An. dirus. A better understanding of nocturnally active mosquito behavioral responses spanning from dusk to dawn would assist in optimizing product development, screening, and effective evaluation.

scholarly journals Population genomics reveal distinct and diverging populations of An. minimus in Cambodia - a widespread malaria vector in Southeast Asia

2021 ◽  
Author(s):  
Brandyce St. Laurent ◽  
Nick Harding ◽  
Nick Deason ◽  
Kolthida Oy ◽  
Chea Sok Loeun ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Southeast Asia ◽  
Genome Sequencing ◽  
Malaria Vector ◽  
Population Genomics ◽  
Sequence Data ◽  
Malaria Vectors ◽  
Open Access Resource ◽  
Two Populations ◽  
Access Resource

Anopheles minimus is an important malaria vector throughout its wide geographic range across Southeast Asia. Genome sequencing could provide important insights into the unique malaria transmission dynamics in this region, where many vector species feed and rest outdoors. We describe results from a study using Illumina deep whole-genome sequencing of 302 wild-caught An. minimus collected from three Cambodian provinces over several years (2010, 2014-2016) and seasons to examine the level of population structure and genetic diversity within this species. These specimens cluster into four distinct populations of An. minimus s.s., with two populations overlapping geographically. We describe the underlying genetic diversity and divergence of these populations and investigated the genetic variation in genes known to be involved in insecticide resistance. We found strong signals of selection within these An. minimus populations, most of which were present in the two Northeastern Cambodian populations and differ from those previously described in African malaria vectors. Cambodia is the focus of the emergence and spread of drug-resistant malaria parasites, so understanding the underlying genetic diversity and resilience of the vectors of these parasites is key to implementing effective malaria control and elimination strategies. These data are publicly available as part of the MalariaGEN Vector Observatory, an open access resource of genome sequence data.

Behavioral Responses of Malaria Vectors,Anopheles minimusComplex, to Three Classes of Agrochemicals in Thailand

2007 ◽  
Vol 44 (6) ◽  
pp. 1032-1039 ◽  
Author(s):  
Jinrapa Pothikasikorn ◽  
Hans Overgaard ◽  
Chitapa Ketavan ◽  
Surapon Visetson ◽  
Michael J. Bangs ◽  
...  
Keyword(s):  
Behavioral Responses ◽  
Malaria Vectors

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

A Clinical Study of Twenty-seven Children Exhibiting Functional Hearing Loss

1981 ◽  
Vol 12 (1) ◽  
pp. 26-35 ◽  
Author(s):  
Donald L. McCanna ◽  
Giacinto DeLapa
Keyword(s):  
Hearing Loss ◽  
Clinical Study ◽  
Early Identification ◽  
Behavioral Responses ◽  
Upper Elementary ◽  
Elementary Grades ◽  
Ability Level ◽  
Hearing Problem

This report reviews 27 cases of children exhibiting functional hearing loss. The study reveals that most students were in the upper elementary grades and were predominantly females. These subjects were functioning below their ability level in school and were usually in conflict with school, home, or peers. Tests used were selected on the basis of their helping to provide early identification. The subjects' oral and behavioral responses are presented, as well as ways of resolving the hearing problem. Some helpful counseling techniques are also presented.

Olfactory Modulation of Steady- State Visual Evoked Potential Topography in Comparison with Differences in Odor Sensitivity

2002 ◽  
Vol 16 (2) ◽  
pp. 71-81 ◽  
Author(s):  
Caroline M. Owen ◽  
John Patterson ◽  
Richard B. Silberstein
Keyword(s):  
Steady State ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Behavioral Responses ◽  
Simultaneous Recording ◽  
Odor Concentration ◽  
Odor Detection ◽  
Detection Response ◽  
Response Groups ◽  
Visual Evoked

Summary Research was undertaken to determine whether olfactory stimulation can alter steady-state visual evoked potential (SSVEP) topography. Odor-air and air-only stimuli were used to determine whether the SSVEP would be altered when odor was present. Comparisons were also made of the topographic activation associated with air and odor stimulation, with the view toward determining whether the revealed topographic activity would differentiate levels of olfactory sensitivity by clearly identifying supra- and subthreshold odor responses. Using a continuous respiration olfactometer (CRO) to precisely deliver an odor or air stimulus synchronously with the natural respiration, air or odor (n-butanol) was randomly delivered into the inspiratory airstream during the simultaneous recording of SSVEPs and subjective behavioral responses. Subjects were placed in groups based on subjective odor detection response: “yes” and “no” detection groups. In comparison to air, SSVEP topography revealed cortical changes in response to odor stimulation for both response groups, with topographic changes evident for those unable to perceive the odor, showing the presence of a subconscious physiological odor detection response. Differences in regional SSVEP topography were shown for those who reported smelling the odor compared with those who remained unaware of the odor. These changes revealed olfactory modulation of SSVEP topography related to odor awareness and sensitivity and therefore odor concentration relative to thresholds.

Comparison of Principal Component Solutions in Two Populations

Methodology ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Gregor Sočan
Keyword(s):  
Simulation Study ◽  
Principal Components ◽  
Common Factor ◽  
Principal Component ◽  
Component Model ◽  
Bootstrap Procedure ◽  
Factor Loadings ◽  
Component Loadings ◽  
Principal Component Model ◽  
Two Populations

Abstract. When principal component solutions are compared across two groups, a question arises whether the extracted components have the same interpretation in both populations. The problem can be approached by testing null hypotheses stating that the congruence coefficients between pairs of vectors of component loadings are equal to 1. Chan, Leung, Chan, Ho, and Yung (1999) proposed a bootstrap procedure for testing the hypothesis of perfect congruence between vectors of common factor loadings. We demonstrate that the procedure by Chan et al. is both theoretically and empirically inadequate for the application on principal components. We propose a modification of their procedure, which constructs the resampling space according to the characteristics of the principal component model. The results of a simulation study show satisfactory empirical properties of the modified procedure.

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