Aquarium guide
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REPRODUCTION
 

REPRODUCTION

In the world's temperate regions, the reproduction of fish generally depends on the season: in other words, it is determined by the temperature. There is only one high season, during which a species usually reproduces only once. In a tropical setting, where variations in temperature are less important, other factors influence on reproduction, especially rain. Fish can lay eggs several times a year, at intervals of sometimes less than a month.

Pair of Hemichromis bimaculatus (jewel cichlid) surrounded by their young

Pair of Hemichromis bimaculatus (jewel cichlid) surrounded by their young.

THE KEYS TO SUCCESSFUL REPRODUCTION

  • Have well-fed and healthy parents.
  • Provide them with the best possible environment:
    • a rearing tank;
    • high-quality water, with characteristics as close as possible to their native setting.
  • Anticipate how you are going to feed the fry.

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СКОРОСТЬ ЗВУКА , скорость распространения звуковых волн в среде. В газах скорость звука меньше, чем в жидкостях, а в жидкостях меньше, чем в твердых телах (причем для сдвиговых волн скорость всегда меньше, чем для продольных). Скорость звука в газах и парах от 150 до 1000 м/с, в жидкостях от 750 до 2000 м/с, в твердых телах от 2000 до 6000 м/с. В воздухе при нормальных условиях скорость звука 330 м/с, в воде - 1500 м/с.