Sex electricity

In his experiment , male and female fish were housed in the same aquarium for a month, during which researchers simulated breeding conditions within the aquarium by imitating a rainy environment — knifefish prefer to breed in the rainy season. This directed movement was only observed in the presence of the male calling signal. However, unlike electric signals, these vibrational signals sometimes stand out from background noise and can therefore be intercepted by predators. Brown ghost knifefish Apteronotus leptorhynchus have a specialised electric organ in their tail that generates a signal called Electric Organ Discharge EOD. Female knifefish generally prefer males with high EODfs, perhaps because they tend to have larger bodies and gain precedence over others while competing for limited resources like food. The frequency and waveform of the message give it a unique code that conveys recognition, aggression, location of food, warnings of danger, and in some cases, even courtship. They recorded the electric signals produced by the fish using electrodes placed on the fish and in the water. They started to make their way towards the vibrating leaf, probably because they thought it was a source of food.

Sex electricity


The insects possess specialised receptor cells in their legs to detect acoustic mating signals. They started to make their way towards the vibrating leaf, probably because they thought it was a source of food. The males housed in a social environment had higher EODfs. They have developed a unique way of finding mates in dark, turbid waters where their vision may be compromised: So while some electric fish have specialised cells to send and receive messages to members of their own species, other fish remain oblivious to this secret courtship within their neighbourhood. It is likely that there are other predators that intercept sexual vibrational cues to locate and capture their prey, and that this tactic is an unrecognised driver of evolution in many invertebrates. The frequency and waveform of the message give it a unique code that conveys recognition, aggression, location of food, warnings of danger, and in some cases, even courtship. However, unlike electric signals, these vibrational signals sometimes stand out from background noise and can therefore be intercepted by predators. Female knifefish generally prefer males with high EODfs, perhaps because they tend to have larger bodies and gain precedence over others while competing for limited resources like food. This directed movement was only observed in the presence of the male calling signal. But some species have additional and unusual weapons in their sexual armoury — the ability to sense vibrations and electric signals which indicate that a similar creature is in the vicinity. Ghost knifefish and electric sex The ghost knifefish, native to freshwaters of South America, are quite unusual. The researchers found that the spiders changed their behaviour in response to different signals. One fish produces an electric field to send a message, and the receiver uses electroreceptors distributed over its skin to interpret the signal. Brown ghost knifefish Apteronotus leptorhynchus have a specialised electric organ in their tail that generates a signal called Electric Organ Discharge EOD. The male leafhopper, for instance, transmits low-frequency vibrations through plants to recognise, locate and approach females. Males produce higher-frequency signals in the range of Hz, whereas females emit signals in the range of Hz. In the presence of such vibrations, the spiders spent more time on the plant and began to display typical foraging behaviour. Vibrational signalling in animals has been well documented, but this is the first evidence for its use in predator-prey relationships. In his experiment , male and female fish were housed in the same aquarium for a month, during which researchers simulated breeding conditions within the aquarium by imitating a rainy environment — knifefish prefer to breed in the rainy season. EODfs do more than just help these fish identify the opposite sex. Messenger Most animals use touch, smell, hearing, taste and sight to identify and attract a mate that goes for humans too. Thus, ghost knifefish not only use electric signals to find their partners but also are capable of continuously adjusting the nature of these signals according to changing environmental conditions. But while this is usually an advantage, sometimes these secret courting signals can be picked up on by predators. The same team also performed a second experiment in which they housed one group of male knifefish in isolation and a second group surrounded by other male and female knifefish. They recorded the electric signals produced by the fish using electrodes placed on the fish and in the water. Killed by vibrations Some species of insects recognise their own kind with vibrations that convey specific information.

Sex electricity


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