[Cloverdale]

Video 1, "The heart of Varroa destructor under the light microscope:" https://youtu.be/t3ZvhwFllfk

Video 2, "Function of Varroa destructor heart. The flow of haemolymph can be easily observed by the movement of hemocytes:" http://youtu.be/NYySIqWEz1s

Video 3, "The heart of Varroa destructor. Malfunction of heart rate following amitraz application:" http://youtu.be//vG1ovEnnrZ8

 

[JTGaraas]

The third video is unavailable. What is the source of the two (2) videos presented? Is there any explanation provided to help explain what is presented? According to Wikipedia (I know, but I am not a scientist), the”circulatory system (of a mite) consists of a network of sinuses and lacks a heart, movement of fluid being driven by the contraction of body muscles.” One source is wrong; which one?

 

[Cloverdale]

http://dx.doi.org/10.11158/saa.24.4.9
Abstract

This study examines the heart and its activity in the mite Varroa destructor. Through light microscopy, the duration and frequency of the beat of the mite’s heart, which is located over the synganglion, was recorded and analysed. The heart measured 165 μm by 60 μm, and consisted of two lateral trunks, inducing pulses with an average duration of 10 sec and an average frequency of 0.13 Hz. The use of cardiac activity as a new bioassay for accurate assessment of the effect of varroacide compounds was also examined.

I havent had time to read this article, I am sharing because its interesting to me.

 

[Cloverdale]

The third video is unavailable. What is the source of the two (2) videos presented? Is there any explanation provided to help explain what is presented? According to Wikipedia (I know, but I am not a scientist), the”circulatory system (of a mite) consists of a network of sinuses and lacks a heart, movement of fluid being driven by the contraction of body muscles.” One source is wrong; which one?

try this
https://www.youtube.com/watch?v=vG1ovEnnrZ8&feature=youtu.be

 

[JTGaraas]

Thanks for the link. I have downloaded the article, and learned that Varroa Destructor have a structure called a heart with an average heartbeat of 7.39 seconds. The minimum time for a heartbeat was 4.33 seconds, and the longest witnessed heartbeat was 23.06 seconds.

Five (5) mites died 5.36 minutes (average) after their exposed hearts were then exposed to Amitraz. I doubt that method will replace oxalic acid vaporization or dribble.

Here is a link to the PDF version.

https://www.biotaxa.org/saa/article/download/saa.24.4.9/44245

 

[Cloverdale]

Thank you for the link. Deb

 

[Fivej]

Cool, thanks