The lover, European Rhodeus
Hi everyone! Today it has spent Valentine's hangover. But there's more of me! (Actually, I found it today so I'll post it). Tuesday, February 15, 2011
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I talk about a fresh water fish and cold. But it is a region of the world where there are no species in our aquarium. I refer to Europe. I suppose it's because they are very inconspicuous. Specifically
reproduction treatment. It is the european Bitterling (English name) or called or rodeo Rhodeus European Rhodeus amarus. Belongs to the great family of the Cyprinidae in the order of Cypriniformes .
interesting thing about this fish is making the male courtship to woo the female. First a male chooses a cold-water clam, Unio pictorum the , which coincidentally were the ones I could get into the store. This beautiful clam (formerly used by painters as a palette, hence its name) can reach up to 14 cm. length during his long life (up to 10 years) and lives half-buried in mud. Microanimalillos feeds on particles and plankton by filtering water through its siphon. In the aquarium will use the tiny scraps of food and small infusoria.
Unio pictorum
Then check the other males as evidence of its vigor. Once this is done "displayed" in front of the female, was turned on its side in front of her, so you can appreciate its beautiful coloration and begin their dance ... In perpendicular face it begins to vibrate, so that the light falling on your body creates a beautiful show of iridescent. Then he teaches the clam you have chosen and screened for it, with a gentle shake of his head pointing to the mollusk.
Apparently not just any clams or mussels, and is the female who has the final decision. She assumes a position of 45 degrees and carefully studied the water is ejected from the mollusk through its siphon, as it seems, by the flow of water is able to distinguish whether the shellfish are healthy and the number of eggs than other females have appeared previously.
Female inspecting the clam with the ovipositor extended
Before spawning, the male and female shellfish have grown accustomed to his presence, by gently rubbing, to avoid closure when females enter their ovipositor.
If the female accepts the clam, and prepares to spawn. For it begins to rotate into position in a complicated maneuver.
In a move very fast, just a second, the female enters the ovipositor, which is 2.5 cm., Through the siphon of the clam, and deposits a few eggs inside the gill chamber mollusk. The female moves away, and one (or more) male approach and a drop of sperm released just as the mollusk absorbs water through its siphon. The water current carries sperm to the interior, which fertilize the eggs.
females deposit eggs
spawning process can be repeated several times during the day, and the adult female can accumulate only 40 to 100 eggs. The mussel then serves as an incubator for classes or as a surrogate mother.
Spawning does not harm the clams, and yet is a great advantage for these fish in their natural environment. The fry are born protected within the hard shell of the mollusk, and besides, if water level drops, the clam will move to deeper waters, also saving the fry.
But this curious relationship also benefits the mollusk. The embryological development of the eggs lasts 2 to 6 weeks, depending on the temperature, and when the fry have absorbed the yolk sac, leaving the clam through its siphon. But the snail also takes to release their own larvae (gloquídeos), which stick to the body of the fry, thus being transported by them until they are released and fall to the bottom, where they develop new clams.
fingerlings in the wild, once they leave the snail, they begin to feed on phytoplankton and tiny critters. In the aquarium we feed them infusoria, powdered peas, brine shrimp and powdered fry food. Another
more for the blog entry that I consider curious and interesting. The truth is that I was surprised when I read the first time. And is that perhaps we are more attracted to tropical fish but we in Europe may not be too bad right?
First I found a source and then I looked and found it much more detailed, I have summarized the important parts. source First / Second Source
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