Science
More Fun Than Fun: The Delicate Truce Between Cleaner Fish and Their Clients
- An elaborate system exists in the ocean in which some fish present themselves to be cleaned at designated ‘cleaning stations’ visited by cleaner fish.
- For an evolutionary biologist, competition is expected whereas cooperation is a paradox, whether in animals, humans or even plants or microbes.
- Competition is easier to explain based on the theory of evolution by natural selection. But cooperation, and especially altruism, requires special explanations.
- And it is the need for special explanations that make cooperation and altruism most interesting, and attracts so many of us to take on this challenge posed by nature.
One of the more lovable phenomena we see in animals is the cooperation between different species, especially when one partner is big and strong and the other is small and weak. A familiar example is the association between two species, where one species cleans the other by removing the ectoparasites of the other. Both parties benefit-cleaners can eat something, cleaners can remove annoying parasites. You may have seen birds riding on mammals’ backs and pecking at their bodies, even in their ears and close to their eyes.
A more complex cleaning symbiosis system can be seen in the ocean, and some fish appear to be cleaned at the designated cleaning station visited by the cleaning fish. These connections between cleaners and their clients are not random, opportunistic encounters, but highly evolved and predictable between professional species that know how to clean best and professional cleaning species that know how to clean best Repeated reciprocal interaction.
There is increasing evidence that cleaning is good for customers. If the cleaner is removed from the cleaning station, the customer will accumulate a large number of parasites. The most common ectoparasites carried by customers are isopods, a type of louse that parasitizes marine animals. There is also good evidence that cleaners do clean-the analysis of their intestinal behavior and intestinal contents confirms this.
As we will see below, this evolving relationship between cleaners and their customers is a good balance between cooperation and conflict.
The bluestreak cleaning fish (Labroides dimidiatus) can clean a variety of customers and is one of the most studied cleaning fish. Much of our understanding of the ecology and evolution of this reciprocal association today comes from years of research by Redouan Bshary, professor of ecology and behavior at the University of Neuchâtel, Switzerland, and his students and colleagues.
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Science
Nasa’s old map of Jupiter, which reminds many of dosa, has gone viral once more
Certain images or videos frequently resurface on the Internet, leaving people speechless. When those clips or pictures are shared again on one social media platform or another, they create a buzz. The National Aeronautics and Space Administration (Nasa) created and posted this image of a map of Jupiter online a few years ago. After being shared on Twitter, the image drew a lot of attention this time. And, as usual, the image made people think of dosa, a popular South Indian dish.
The image was shared by the Twitter account Latest in Space. “From the very bottom of Jupiter, I’m looking up. While tweeting the image, they wrote, “Seen by NASA Cassini.” The images from the Cassini spacecraft’s narrow-angle camera were used to create this out-of-this-world image, which is part of a coloured map series produced by the space agency.
The article was published a few days ago. The tweet has received nearly 20,000 likes since it was shared, and the number is growing. The tweet has been retweeted more than 2,000 times. Take a look at some of the comments to see how the image of Jupiter looks like dosa.
A Twitter user commented, “Looks like a designer dosa.” “When I rush to pick up a call, this is what happens to my dosa on the dosa pan,” one joked. “This is how my mother makes Dosa,” a third said. “Jupiter in the making,” wrote a fourth, along with a photo of someone preparing – you guessed it – dosa.
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