humaguy
Premium Member
More from Frank...
"Lighting and Temperature
Lighting and water temperature are important parameters when conditioning fish to spawn. As in all reef fishes, the reproductive cycles of Centropyge are closely tied to environmental cues. Warm water temperatures and long days induce gonadal maturation and reproductive behavior. Tropical species (example: C. flavissimus , C. bicolor and C. bispinosus) will spawn periodically throughout the year, while those experiencing seasonal changes usually have a distinct breeding season. For example, the Japanese pygmy angel, off southern Japan, and the Potter’s angel, off Hawaii, only spawn in the spring and summer months when daylight exceeds 13 hours and temperatures are or rise above 26°C. During their spawning period Centropyge species reproduce daily. Courtship is thought to commence near late afternoon and culminate at dusk.
To induce reproduction we provide a light period of 15 hours at anywhere from 1-3 watts per gallon. Light intensity is reduced during the last two hours to create a crepuscular effect, though this is not necessary once the fish have begun to spawn regularly. Water temperatures are maintained near 28°C for tropical species and 26°C for sub-tropical ones. Winter-like conditions are created for 1-2 months every year by reducing the light period by 3 hours and temperature by 3°C. This change inhibits reproduction and gives our broodstock a well-deserved rest."
