Orientation of the Males of Aedes aegypti (L.) (Diptera: Culicidae) to Sound

1962 ◽  
Vol 94 (6) ◽  
pp. 613-626 ◽  
Author(s):  
G. Wishart ◽  
G. R. van Sickle ◽  
D. F. Riordan
Keyword(s):  
Aedes Aegypti ◽  
Sound Source ◽  
Second Harmonic ◽  
Small Distance ◽  
Anopheles Subpictus ◽  
Electrophysiological Evidence ◽  
The Relationship ◽  
Male Mosquitoes ◽  
Electrophysiological Methods ◽  
Phase Differences

Many authors noted the attraction of the males of several species of mosquitoes to sound (references summarized by Roth, 1948). The frequencies of sound to which the males respond were investigated by Roth (1948) and the frequencies and intensities by Wishart and Riordan (1959). Tischner (1953) applied electrophysiological methods to the reception of sound in the male of Anopheles subpictus Grassi and advanced a theory to explain the ability of the male of this species to orient itself toward the sound source. In his theory he dismissed the use of phase differences between the two receptors because of the relatively small distance between the two antennae and concluded that each is capable of functioning alone by detecting the relationship bemeen the fundamental and the second harmonic in the microplionics produced by the Johnston's organ. He did not demonstrate this by behaviour experiments nor, do we believe, did he produce sufficient electrophysiological evidence. The present paper is a further examination of this subject in the mosquito Aedes aegypti (L.), in an attempt to reconcile the data from electrophysiological experiments with those of behaviour in an explanation of the orientation of male mosquitoes towards sound.

scholarly journals Proporsi Larva Aedes aegypti dan Aedes albopictus, Hubungannya dengan Kejadian Demam Berdarah Dengue di Daerah Endemik Suburban Kabupaten Sleman, Yogyakarta

2019 ◽  
pp. 163-170
Author(s):  
Bobby Fahmi Muldan Pahlevi ◽  
Tri Wulandari Kesetyaningsih
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Dengue Hemorrhagic Fever ◽  
Urban Areas ◽  
Endemic Area ◽  
Hemorrhagic Fever ◽  
Suburban Area ◽  
Dengue Transmission ◽  
The Relationship

Dengue Hemorrhagic Fever (DHF) is transmitted by Aedes aegypti and Ae. albopictus. Aedes aegypti chooses to live indoors and Ae. albopictus in outdoors. Aedes aegypti has been proven to play a role in dengue transmission in urban areas. It is assumed that suburbs dominated by gardens, so it is possible that Ae. albopictus acts as a vector. The study aimed to analyze the relationship between Ae. albopictus and DHF incidence in suburban area. The study was conducted in Godean, Sleman Regency. 280 ovitrap were placed indoors and outdoors at across seven villages. Each village was represented by one hamlet, so there were 40 ovitrap of each hamlet. The proportion of ovitrap containing Ae. aegypti and Ae. albopictus larvae was calculated. The results showed that Ae. aegypti larvae was more indoors (78.50%) than outdoors (21.45%) in all villages and negatively correlates with DHF (p=0.036; r=-0.776). Aedes albopictus larvae is more commonly found in gardens (80.64%) than in homes (19.36%) and does not correlate with DHF (p = 0.702). It was concluded that in suburban endemic area of ​​Sleman Regency, Ae. aegypti larvae was more indoors and negatively correlated with DHF. Aedes albopictus larva was more in the garden and did not correlate with DHF incidence.

Mosquito hearing: sound-induced antennal vibrations in male and female Aedes aegypti

1999 ◽  
Vol 202 (20) ◽  
pp. 2727-2738 ◽  
Author(s):  
M.C. Gopfert ◽  
H. Briegel ◽  
D. Robert
Keyword(s):  
Aedes Aegypti ◽  
Harmonic Oscillators ◽  
Male And Female ◽  
Male Antenna ◽  
Biologically Relevant ◽  
Antennal Flagellum ◽  
Female Antenna ◽  
Males And Females ◽  
Acoustic Sensitivity ◽  
Male Mosquitoes

Male mosquitoes are attracted by the flight sounds of conspecific females. In males only, the antennal flagellum bears a large number of long hairs and is therefore said to be plumose. As early as 1855, it was proposed that this remarkable antennal anatomy served as a sound-receiving structure. In the present study, the sound-induced vibrations of the antennal flagellum in male and female Aedes aegypti were compared, and the functional significance of the flagellar hairs for audition was examined. In both males and females, the antennae are resonantly tuned mechanical systems that move as simple forced damped harmonic oscillators when acoustically stimulated. The best frequency of the female antenna is around 230 Hz; that of the male is around 380 Hz, which corresponds approximately to the fundamental frequency of female flight sounds. The antennal hairs of males are resonantly tuned to frequencies between approximately 2600 and 3100 Hz and are therefore stiffly coupled to, and move together with, the flagellar shaft when stimulated at biologically relevant frequencies around 380 Hz. Because of this stiff coupling, forces acting on the hairs can be transmitted to the shaft and thus to the auditory sensory organ at the base of the flagellum, a process that is proposed to improve acoustic sensitivity. Indeed, the mechanical sensitivity of the male antenna not only exceeds the sensitivity of the female antenna but also those of all other arthropod movement receivers studied so far.

Flight Responses to Various Sounds by Adult Males of Aedes aegypti (L.) (Diptera: Culicidae)

1959 ◽  
Vol 91 (3) ◽  
pp. 181-191 ◽  
Author(s):  
Geo. Wishart ◽  
D. F. Riordan
Keyword(s):  
Aedes Aegypti ◽  
Sound Source ◽  
Natural Environment ◽  
Primary Response ◽  
Adult Males ◽  
Loud Speaker ◽  
Lower Limits

Many authors observed that mosquitoes respond to a large variety of artificial sounds (for references see Roth. 1948). Efforts to attract males of Aedes aegypti (L.) by play-back recoridings of the flight sound of the female have met with moderate success (Kahn et al., 1945; Offenhauser and Kahn, 1949; Kahn and Offenhauser, 1949). Roth (1948) demonstrated that males of A. aegypti approached the sounds of tuninh forks and sine sounds from a speaker. He also determined the upper and lower limits of frequencies that stimulated males, but in these experiments he did not use attraction to the source of the sound as the criterion of response, but the “seizing and clasping”reaction. He exposed the maIe mosquitoes in cages, three inches by three inches by one inch, placed against a box that housed a loud speaker. Under these conditions the mosquitoes had little opportunity to fly to orient themselves toward the sound source. Moreover the sound used was of such intensity (108 db at 2½ inches) that the whole cage vibrated, so that at least part of the response was undoubtedly caused by vibration of the substratum on which the mosquitoes rested. Sounds of such intensity do not normally occur in the natural environment of the mosquito. Moreover, the “seizing and clasping” response does not occur until the male approaches the female in response to sound or other stimulus. If the place of sound in the attraction of thc males is to be studied, the primary response, that of approach, should be the criterion and the amount of sound used should bear a reasonable relation to that occurring in nature.

scholarly journals Suppression of a Field Population of Aedes aegypti in Brazil by Sustained Release of Transgenic Male Mosquitoes

2015 ◽  
Vol 9 (7) ◽  
pp. e0003864 ◽  
Author(s):  
Danilo O. Carvalho ◽  
Andrew R. McKemey ◽  
Luiza Garziera ◽  
Renaud Lacroix ◽  
Christl A. Donnelly ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Sustained Release ◽  
Field Population ◽  
Male Mosquitoes ◽  
Transgenic Male

DIAGRAMS FOR MAGNETOTELLURIC DATA

Geophysics ◽  
1976 ◽  
Vol 41 (4) ◽  
pp. 766-770 ◽  
Author(s):  
F. E. M. Lilley
Keyword(s):  
Impedance Tensor ◽  
Two Dimensional ◽  
Magnetotelluric Data ◽  
One Dimensional ◽  
Magnetic Components ◽  
Strike Direction ◽  
Electric And Magnetic Fields ◽  
The Relationship ◽  
Special Case ◽  
Phase Differences

Observed magnetotelluric data are often transformed to the frequency domain and expressed as the relationship [Formula: see text]where [Formula: see text] [Formula: see text] and [Formula: see text] [Formula: see text] represent electric and magnetic components measured along two orthogonal axes (in this paper, for simplicity, to be north and east, respectively). The elements [Formula: see text] comprise the magnetotelluric impedance tensor, and they are generally complex due to phase differences between the electric and magnetic fields. All quantities in equation (1) are frequency dependent. For the special case of “two‐dimensional” geology (where structure can be described as having a certain strike direction along which it does not vary), [Formula: see text] with [Formula: see text]. For the special case of “one‐dimensional” geology (where structure varies with depth only, as if horizontally layered), [Formula: see text] and [Formula: see text].

scholarly journals Underwater Spiral Wave Sound Source Based on Phased Array with Three Transducers

Sensors ◽  
2019 ◽  
Vol 19 (14) ◽  
pp. 3192
Author(s):  
Lu ◽  
Guo ◽  
Lan ◽  
Sun ◽  
Li ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Sound Source ◽  
Piezoelectric Ceramic ◽  
Phased Array ◽  
Fem Simulation ◽  
Spiral Wave ◽  
Sound Field ◽  
The Finite Element Method ◽  
The Relationship ◽  
Made In

This paper realizes an underwater spiral wave sound source by using three omni-directional spherical transducers with three different phases. The pressure distribution of the sound field for a phased array is derived using the superposition theory of sound field. The generation of spiral wave field is presented, the relationship between the performance of phased array sound field and the array parameters is analyzed, and also verified by the finite element method (FEM). A spiral wave sound source with three spherical piezoelectric ceramic transducers is then designed and fabricated based on FEM simulation, and the performance of the sound source is analyzed. Measurements are made in a reverberation pool, and the result shows that the fabricated spiral wave sound source is capable of producing a spiral sound wave. Under a frequency of 3.5 kHz, the phase directivity has a fluctuation of ±21°, and the amplitude directivity range is 4.3 dB, which verifies the realization of the spiral wave sound source.

scholarly journals The relationship between entomological indicators of Aedes aegypti abundance and dengue virus infection

2017 ◽  
Vol 11 (3) ◽  
pp. e0005429 ◽  
Author(s):  
Elizabeth A. Cromwell ◽  
Steven T. Stoddard ◽  
Christopher M. Barker ◽  
Annelies Van Rie ◽  
William B. Messer ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Dengue Virus Infection ◽  
The Relationship

scholarly journals Species Composition and Diversity of Malaria Vector Breeding Habitats in Trincomalee District of Sri Lanka

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Nayana Gunathilaka ◽  
Wimaladharma Abeyewickreme ◽  
Menaka Hapugoda ◽  
Rajitha Wickremasinghe
Keyword(s):  
Sri Lanka ◽  
Larval Habitat ◽  
Malaria Vectors ◽  
Entomological Surveillance ◽  
Anopheles Subpictus ◽  
Control Programs ◽  
Breeding Habitats ◽  
Elimination Programme ◽  
Total Dissolved Solid ◽  
The Relationship

Introduction. Mosquito larval ecology is important in determining larval densities and species assemblage. This in turn influences malaria transmission in an area. Therefore, understanding larval habitat ecology is important in designing malaria control programs.Method. Larval surveys were conducted in 20 localities under five sentinel sites (Padavisiripura, Gomarankadawala, Thoppur, Mollipothana, and Ichchallampaththu) in Trincomalee District, Eastern Province of Sri Lanka, between June 2010 and July 2013. The relationship between seven abiotic variables (temperature, pH, conductivity, Total Dissolved Solid (TDS), turbidity, Dissolved Oxygen (DO), and salinity) was measured.Results. A total of 21,347 anophelines were recorded representing 15 species.Anopheles subpictus24.72% (5,278/21,347) was the predominant species, followed by 24.67% (5,267/21,347) ofAn. nigerrimusand 14.56% (3,109/21,347) ofAn. peditaeniatus. A total of 9,430 breeding habitats under twenty-one categories were identified.An. culcicifacieswas noted to be highest from built wells (20.5%) with high salinity (1102.3 ± 81.8 mg/L), followed by waste water collections (20.2%) having low DO levels (2.85 ± 0.03 mg/L) and high TDS (1,654 ± 140 mg/L).Conclusion. This study opens an avenue to explore new breeding habitats of malaria vectors in the country and reemphasizes the requirement of conducting entomological surveillance to detect potential transmission of malaria in Sri Lanka under the current malaria elimination programme.

scholarly journals The Relationship Between PSN Behavior with Existence Larvae of Aedes aegypti In Port of Pulang Pisau

2017 ◽  
Vol 5 (1) ◽  
pp. 1
Author(s):  
Nani Nani
Keyword(s):  
Aedes Aegypti ◽  
Simple Random Sampling ◽  
P Value ◽  
Chi Square ◽  
Cross Sectional ◽  
Attitude And Practice ◽  
Chi Square Test ◽  
Cross Sectional Design ◽  
The Relationship ◽  
Knowledge Attitude And Practice

The existence of Aedes aegypti larvae is an indicator of the existence of Aedes aegypti mosquito populations in the area. This mosquito is a vektor that can transmit diseases like Dengue, Zika, Yellow Fever and Chikungunya. The most effective efforts to eradicate mosquito larvae are within off the circle of mosquito chain that is by conducting mosquito nest eradication (PSN). Factors that may affect the existence of Aedes aegypti larvae are PSN behavior that consist of knowledge, attitudes and practice. The purpose of this study was to analyze the relationship of knowledge, attitudes and practice mosquito eradication with existence of Aedes aegypti larvae. This study use cross sectional design with a sample size of 80 respondents selected by simple random sampling. To determine the relationship between the dependent variable and independent variables used chi square test. The independent variable in this study is the knowledge, attitude and practice. The results of this study show that based on the chi square test with α = 5% knowledge (p value = 0,004; PR = 1,76; CI 95% 1,19-2,59), attitude (p value = 0,024 ; PR = 1,55 ; CI 95% 1,08-2,24) and the PSN practice (p value = 0,000, PR = 3,89; CI 95% 2,01-7,52) relationship with existence larvae. The conclusion is that there are relationship between knowledge, attitude and practice PSN with the exixtence of Aedes aegypti larvae in the Port of Pulang Pisau.Keywords: the existence of larvae of Aedes aegypti, knowledge, attitudes, practice PSN

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