The Chick's Preference for Certain Features of the Maternal Cluck Vocalization in the Domestic Fowl (Gallus Gallus)

Behaviour ◽  
1993 ◽  
Vol 125 (3-4) ◽  
pp. 177-187 ◽  
Author(s):  
J.P. Kent
Keyword(s):  
Gallus Gallus ◽  
Choice Test ◽  
Test Apparatus ◽  
Predominant Frequency ◽  
Frequency Range ◽  
Optimal Frequency ◽  
Frequency Rate ◽  
Simultaneous Choice ◽  
Methodological Difference ◽  
Domestic Hen

AbstractThe predominant frequency, rate of clucking and intensity of the maternal cluck vocalization of the broody hen (Gallus gallus) are described. The frequency, rate of clucking, and level of intensity of the cluck vocalizations were altered independently of each other. Three-day-old chicks were given a simultaneous choice test between the normal and an altered cluck or between the two altered clucks in a 'T' shaped simultaneous choice test apparatus. No significant preferences were found when the frequency was increased or decreased by 25% (Experiment 1A) but the chicks significantly prefer the normal cluck over a cluck with a 33% increase in frequency. The preference for the normal cluck over the 33% decrease in frequency was nearly significant (Experiment 1B). Thus, there exists an optimal frequency range for the maternal cluck vocalization of the domestic hen. When the rate of clucking was increased or decreased by 25% the chicks preferred the higher rate of clucking in all conditions (Experiment 2). However, the highest rate of clucking used in this experiment was close to that of the normal cluck. When the intensity was increased or decreased by 100% no significant preferences were found in any choice test (Experiment 3). This contrasts with earlier findings possibly due to a methodological difference.

Evidence of the crested form of domestic hen (Gallus gallus f. domestica) from three post-medieval sites in Hungary

2010 ◽  
Vol 37 (5) ◽  
pp. 1065-1072 ◽  
Author(s):  
Erika Gál ◽  
Péter Csippán ◽  
László Daróczi-Szabó ◽  
Márta Daróczi-Szabó
Keyword(s):  
Gallus Gallus ◽  
Domestic Hen

scholarly journals CBMT-13. 3DEP SYSTEM TO TEST THE ELECTRICAL PROPERTIES OF DIFFERENT CELL LINES AS PREDICTIVE MARKERS OF OPTIMAL TUMOR TREATING FIELDS (TTFIELDS) FREQUENCY AND SENSITIVITY

2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi35-vi35
Author(s):  
Moshe Giladi ◽  
Einav Zeevi ◽  
Karnit Gotlib ◽  
Cornelia Wenger ◽  
Ariel Naveh ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Cell Line ◽  
Cell Lines ◽  
Electric Fields ◽  
Intermediate Frequency ◽  
Predictive Markers ◽  
Membrane Capacitance ◽  
Frequency Range ◽  
Optimal Frequency ◽  
Tumor Treating Fields

Abstract BACKGROUND Tumor Treating Fields (TTFields; approved anti-neoplastic treatment modality) are delivered via application of low intensity, intermediate frequency, alternating electrical fields. The electrical properties of cells (eg, permittivity and conductivity) determine the optimal TTFields frequency that would elicit the greatest cell count reduction. Currently, no predictive markers exist to determine TTFields response and optimal frequency for individual patient application. The study goal was to evaluate the correlation between electrical properties of cells and TTFields’s optimal frequency and sensitivity. The 3DEPTM reader (LabTech) determines cellular electrical properties, including permittivity and conductivity, by using dielectrophoresis (DEP) force. DEP is a physical effect that generates a force on polarizable particles, such as cells, subjected to non-uniform electric fields. METHODS Utilizing the 3DEP reader, baseline electrical properties (permittivity and conductivity) of 17 cell lines from different tumor-types were determined. Curves were analyzed using 2-way ANOVA. The optimal TTFields frequency of each cell line was determined by evaluating TTFields cytotoxicity at various frequencies using the inovitroTM system. Electrical properties of each cell line were compared with the optimal TTFields frequency and sensitivity. RESULTS Significant differences (P< 0.001) were demonstrated between the lower frequency range of the 3DEP curves that correspond to cellular membrane capacitance at TTFields optimal frequencies of 150 kHz (9 cell lines) and 200 kHz (8 cell lines). Also, membrane capacitance was a good predictor of TTFields sensitivity based on curve differences within the low-frequency range. CONCLUSIONS These results demonstrate that cell membrane capacitance correlates with TTFields optimal frequency and sensitivity. Based on these data, there is a strong rational to further explore the potential of measuring the electrical properties of cells as predictive markers to help determine the optimal TTFields frequency for individual patient application and to identify ideal treatment-responders to TTFields.

Optimal Frequency Range Selection for PZT Transducers in Impedance-Based SHM Systems

2010 ◽  
Vol 10 (8) ◽  
pp. 1297-1303 ◽  
Author(s):  
Fabricio Guimarães Baptista ◽  
Jozue Vieira Filho
Keyword(s):  
Frequency Range ◽  
Optimal Frequency ◽  
Selection For ◽  
Range Selection

Function of Manx Shearwater Calls in Mate Attraction

Behaviour ◽  
1984 ◽  
Vol 89 (1-2) ◽  
pp. 73-88 ◽  
Author(s):  
A.E. Storey
Keyword(s):  
Choice Test ◽  
Directional Information ◽  
Male And Female ◽  
Mate Attraction ◽  
Simultaneous Choice ◽  
Risk Of Predation ◽  
Female Attraction ◽  
Male Calling ◽  
Manx Shearwater

AbstractPlayback experiments were used to study the role of vocalization in mate attraction by Manx shearwaters, a nocturnal seabird. Pre-breeding birds were exposed to test calls of male and female shearwaters calling from the range of normal locations: above the colony as in a flyover call, on the ground in the colony, or from within the nesting burrow. Both female and male test calls increased the frequency of male calling but only male calls increased the frequency of female calling. These findings suggest that male calls 1) facilitated competing responses from other males that are attempting to attract females to their burrows and 2) stimulated calling in available females that require more directional information to find the advertising male. Male calling location, inside or outside the burrow, probably reflected a compromise between being audible to females and being susceptible to predation. Because the call was more widely broadcast, male test calls played from outside the burrow caused more females to land in the colony than the same call played from inside the burrow. However in a simultaneous choice test between a burrow and an outside male test call, males calling from inside did not lose females to the adjacent outside male. Thus calling from inside the burrow in an area where another male is calling outside maximized female attraction while minimizing risk of predation. The male call played from inside the burrow attracted as many females as a pair call from inside but the response of females to the pair was less sustained, indicating that duetting pairs-inhibited the response of unpaired females. Male and female calls emanating from above the colony suppressed the rate of female flyover calls suggesting that during this test condition other birds stopped calling in an attempt to orient to the source of the test call.

scholarly journals DEVELOPMENT SHAFT RUN-OUT MEASUREMENT TRANSDUCERS FOR POWERFUL GENERATORS FAULT CONTROL SYSTEM WITH CAPACITIVE COPLANAR CONCENTRIC SENSOR

InterConf ◽  
2021 ◽  
pp. 1014-1021
Author(s):  
Ievgev Zaitsev ◽  
Anatolii Levytskyi ◽  
Victoria Bereznychenko
Keyword(s):  
Measuring Transducer ◽  
Capacitive Sensor ◽  
Conversion Function ◽  
Primary Transducer ◽  
Frequency Range ◽  
Optimal Frequency ◽  
Capacitance Voltage ◽  
Frequency Independent ◽  
Coplanar Electrodes ◽  
Independent Measuring

The paper presents the results of the study of a capacitive radial beating sensor, consisting of a primary transducer with concentric coplanar electrodes and a secondary measuring transducer «capacitance - voltage». The design and results of calculations of the capacitive sensor conversion function presented. The parameters of the circuit of the secondary measuring transducer based on the frequency-independent measuring circuit are determined. The optimal frequency range for measurements selected.

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