Roloffia

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Roloffia
Roloffia

Video: Roloffia

Video: Roloffia
Video: Les Aphyosemion+fundulopanchax+Roloffia 2024, March
Anonim

The Roloffia inhabit the west coast of Africa, west from Ghana to Senegal.

Most of the species are kept in small rivers of tropical forests and only a few species in the reservoirs of the shroud. Large species live in water bodies that dry up during drought, i.e. from the onset of the rainy season to the drought period (about 6 months) and called. seasonal or annual. The caviar laid by them in the ground undergoes diapause and after the onset of rains fry hatch out of it.

The body of the Roloffia is elongated in length, close to the pike-like shape, the anterior part is almost cylindrical and flattens laterally to the caudal peduncle. Fish love shade in places, keep in the lower middle layers of water. Males behave rather aggressively towards each other, but in a large aquarium with a large number of fish their attention is diverted and aggressiveness decreases.

Scriptaphyosemion Smitt Juarzon (Scriptaphyosemion schmitti), photo photo of fish
Scriptaphyosemion Smitt Juarzon (Scriptaphyosemion schmitti), photo photo of fish

Scriptaphyosemion Juarzon (Scriptaphyosemion schmitti). Photo © Hristo Hristov

It is better to keep 1 male and several females in a species aquarium, or in a large aquarium with other fishtooths of a similar size, and the species should occupy different layers of water.

The aquarium should have some thickets and floating plants that provide shade and cover. Water: 20-24 ° С, dН up to 15 °, pH 6-7, level up to 25 cm, obligatory weekly change without changing parameters. Some aquarists recommend adding table salt (1.5 g / L).

Food: live.

According to the methods of reproduction, rolofia can be divided into two main groups. In one, caviar develops without diapause, in the other with it. There is a group of fish, the eggs of which can develop both with diapause and without it. Before planting for spawning, females and males are kept separately for 2 weeks. 1 male and 2-4 females are usually planted for spawning. Water: 24-26 ° C, dH 2-6 °, pH 5.5-6.5, level 10 cm. Spawning lasts several weeks, the female lays several eggs a day, more often in the morning. Species of fish, whose eggs develop without diapause, throw them among the plants to which they adhere.

A spawning aquarium without soil is placed on a dark substrate and planted with small-leaved plants, weighing them down with glassy rods so that they do not float.

There are several options for breeding rolofia:

- Fish are not removed from the aquarium and wait for hatching and the appearance of fry at the surface / fish, for the most part, do not touch the eggs and fry /, after which they are caught and transferred to the nursery aquarium.

- The fish are not removed, but the substrate with caviar is transferred into a shallow vessel with water at a level of 3-5 cm and the same parameters. Caviar is constantly monitored, especially during the first 4-5 days. at this time, it is most often covered with a fungus. Such and whitened unfertilized eggs are removed. The development of the embryo ends when its eyes are visible as dark spots. At this time, hatching should be expected, which can be stimulated by watering with water of the same composition, but colder by 2-4 ° C.

- The fish are removed and the water level is lowered by 3-5 cm and further as described above.

Afiosemion southern (Aphyosemion australe), photo photograph of fish
Afiosemion southern (Aphyosemion australe), photo photograph of fish

Aphyosemion southern (Aphyosemion australe). Photo © Hristo Hristov

It happens that, despite the correct development of embryos, hatching does not occur. Then you need to shake the dishes with water and caviar, if this does not help, then replace the water with fresh and cold (10 ° C). Dry food (daphnia, cyclops) can be poured on the surface of the water, which will lead to the strong development of bacteria and a decrease in the oxygen content and the fry will tend to break through the shell of the eggs in order to leave the unfavorable environment. They must be immediately transferred to clean water with the same parameters as in the spawning aquarium.

R. Bekh believes that it is better to put fine sand at the bottom of the spawning aquarium for fish whose eggs are undergoing diapause; 5 cm and within 2 weeks examine and remove unfertilized or mushroom eggs, then transfer the remaining healthy ones to moist peat. Instead of sand, you can put peat, which is removed from time to time and replaced with a new one, but no later than after 3 weeks.

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