Finding the perfect home is hard, and some Mantis shrimp What is called a “smasher” for a club-like arm works hard to find the right one. If the house already has an owner, the intruder fights fiercely to get rid of it.
To find out how aggressively this little crustacean fights to abandon the previous owner of the coral burrow, researchers have created an “arena” in the laboratory aquarium to own the desired simulated burrow. A battle was fought between Shako over.
Mantis shrimp usually prefer larger burrows than their bodies, leaving room for growth, but this was not always the case in experiments. Scientists struggled hardest to win a house that was slightly smaller than ideal in a gradual battle. Perhaps the intruder realized that the small burrow contained a defeatable Punic rival.
Relation: smash!Super Stubby Shako shows off in video
Despite their common name, mantis shrimp are not shrimp. Rather, they are orders for Mantis shrimp, related crustaceans.Scientists gathered mantis shrimp for research Neogonodactylus bredini, It inhabits coral reefs in the southern Caribbean Sea and can be up to 2.4 inches (60 mm) long. Smithsonian Tropical Research Institute..
Mantis shrimp “punch” Known for its speed, it accelerates at 80 km / h (50 mph), giving a blow that can break snail shells or break aquarium glass. N. Bredini Researchers have reported that both men and women compete for ownership of rubble burrows on seagrass reefs, resulting in “potentially damaging and powerful strikes during these contests.”
Scientists randomly combined male and female mantis shrimp and adapted them separately to burrows of various sizes. Next, one shrimp was presented with a plastic hole with a single opening that allowed it to make itself at home. Scientists then introduced a second shrimp into the aquarium and observed whether the intruder would attack the burrow resident (surveys show that one of the mantis shrimp is at risk of serious injury or death. If so, the competition has been cancelled).
When choosing a burrow for mantis shrimp, they usually chose an option that included a growing room. But when crustaceans had to fight for already occupied burrows, they fought harder and were more successful if the burrows were smaller than their ideal size, researchers found.
Barrow’s inhabitants definitely had the advantage of Home Turf — intruders won only 31% of their fights. If the burrow was too big or too small for the intruder, it would be even worse, winning only 13% of the battle.
However, when the burrow was slightly smaller than ideal for the intruder’s body size, the intruder’s mantis shrimp had a 67% chance of winning. It is possible that the intruder evaluated the size of the small burrow and realized that the shrimp inside were also smaller and easier to defeat in battle.
“We know that animals can evaluate a variety of factors, such as the size of their opponents and the value of their prizes, when deciding whether to fight or how difficult it is to fight,” said Human Postdoc. Postdoctoral fellow Patrick Green said. Frontier Science Program at the Center for Ecology and Conservation at the University of Exeter in Cornwall, England.
“In this case, the small burrows are probably occupied by small enemies, so if that means an easier fight, Shako seems to compromise on the size of the house,” Green said. Said in a statement.. “Animals may seem to fight the hardest for their greatest wealth, but this study is an example of the greatest effort reserved for the’just right’,” Green said.
They published their findings online in the journal on October 28th. Animal behavior..
Originally published in Live Science.