Development
Fertile Harlequin Rasbora eggs require approximately 18 hours to hatch at a temperature of 28°C. Upon hatching, the fry are translucent, around 3 to 4 millimetres long, and remain attached to the leaf upon which the eggs were laid for a further 12 to 24 hours, during which the yolk sac is absorbed. Once this process is completed, the fishes become free-swimming, and at this stage, require very fine sizes of food such as live infusoria for a period of 7 to 14 days, after which the fry are able to feed upon newly hatched Brine Shrimp. If infusoria are unavailable, commercial prepared foods for egglayer fry may also be used.
The Harlequin Rasbora takes approximately 8 to 10 weeks for the fry to assume full adult colouration.
Read more about this topic: Harlequin Rasbora
Famous quotes containing the word development:
“Theories of child development and guidelines for parents are not cast in stone. They are constantly changing and adapting to new information and new pressures. There is no “right” way, just as there are no magic incantations that will always painlessly resolve a child’s problems.”
—Lawrence Kutner (20th century)
“Creativity seems to emerge from multiple experiences, coupled with a well-supported development of personal resources, including a sense of freedom to venture beyond the known.”
—Loris Malaguzzi (20th century)
“Dissonance between family and school, therefore, is not only inevitable in a changing society; it also helps to make children more malleable and responsive to a changing world. By the same token, one could say that absolute homogeneity between family and school would reflect a static, authoritarian society and discourage creative, adaptive development in children.”
—Sara Lawrence Lightfoot (20th century)