Whales are known to have different cultures , in which dissimilar mathematical group spill the beans and communicate using different song . This is the case with the sperm cell whales that endure off the Galápagos Islands in the Pacific , but in an interesting set of events describe in theRoyal Society Open Science , it seems that one group of whales completely replaced another , something that has n’t been keep an eye on before in the species .
Whatseems to have occurredis a prominent exfoliation migration of different groups , or “ clans ” , of sperm whales . When the two original groups moved out of the waters surrounding the Galápagos , it turns out that it was n’t the same whales that returned over 10 twelvemonth later . This cultural overturn , in which “ an integral population is put back with a completely different set of individuals , ” according to the authors of the sketch , is in reality a very rarefied event , and has usually only been witness in human societies .
It all begin when researcher from an international mathematical group of universities start out canvass the sperm whale population subsist off the Galápagos Islands in 1985 . Using picture recognition and sonar microphones , they were able to cut across private giant and determined that there were two distinct clans , which communicated between themselves in discrete vocalizations or dialects . These were the even clan , which communicate with regularly spaced click , and the Plus - One kin , which showed an extended separation before the last click .
But then in the 1990s , something happened . For some unknown reason , both kindred of whale started to allow the Galápagos , and manoeuvre for the glide of Chili and the Gulf of California . By 1999 , there were no spermatozoon whales left in the waters surrounding the remote Pacific islands . What drove this sudden drive is still not understand , but it is thought that it may have been to do with the availability of their favorite food , squid . Either the numbers degenerate around the islands , or they increase along the slide of the mainland .
That wasuntil the researchers heardreports in 2013 of spermatozoon whales having been spotted off the Galápagos Islands once more . Heading back out , they lowered their sonar microphone into the body of water and wait to learn the two clans once again chit-chat . But what they heard was different . The ocean was now filled with the noise of two different kin , which are acknowledge as the poor clan , and the Four - Plus clan . These groups had been heard before in other parts of the Pacific , but were uncommon visitors to the Galápagos .
It seems then that the original two clans of whales have now been supersede by two completely different radical . This total cultural employee turnover , in which not a individual phallus of either of the first groups integrated into the second chemical group is surprisingly rare within the animal land , and could have significant implications on how multitude manage sperm heavyweight population in the future .
