zozo
Member
That's the same question as "What was their first, the chicken or the egg?" Tho predation absolutely could be a trigger for fish to flee and jump especialy smaller schooling fish often victimized by predators show that flee behaivor also as a chain reaction. But there are much more variables under suspicion to think about.I suspect all surface dwelling fish have evolved to jump as a defence against attach from below, so I think I have the choice to either leave that part of the tank empty or to take a bit of a risk. I’m a bit more willing to do that with killies than butterflyfish
Food competition since almost all fish species are predators, for example what falls on the surface. And it doesn't absolutely needs to be food to trigger curiousity, it can be a speck of dust landing on the surface you don't even notice. But surface dwelling fish spots this, that's also what they are evolved into. Gets curious and race towards it, than you see food competition others spot it as well and other spot something is spotted and the race is on, who's going to be first at the price. That's also a schooling fish chain reaction.. Obviously size of the fish in this case should be considered, for example Epiplatus annulatus a rather tiny Killie fish you wont expect this little fish to go after a housefly or an bigger adult misquito. As micropredator it's much less likely to jump large distances, if jump at all if enough surface coverage is provided. This way you provide sufficient aquatic micro fauna to predate on and block the eye sight to trigger food competition jumps. While the for the Pantodon a housefly hoovering twice the height of the fishes length over the tank is a potential snack and worth a jump.
Mating display and competiotion can trigger jumps, males trying to chase eachother away.
Parental care and protection. For example Chiclids which you have do parantal care and can be extremely protective and attack anything comming close.
Parasites or just a simple ich can trigger a jump. The stronger to fish the more agressive the jump.
Not only surface dwelling fish can have jumping behaivor.. Gobbies are also known to be excellent jumpers.. Another one, what was the english common name again? Siamese flying fox?
There are several things to take into account when it comes to well arranged scapes and stocking. This commes with experience, reading and logical behaivor paterns among different species.. For example breeding Cichlids in a relative shallow open top bellow a school of surface dwelling fish, 1 x1 = 2.. 😉
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