Spawning behaviour, early development and first feeding of the bluestriped angelfish [Chaetodontoplus septentrionalis (Temminck & Schlegel, 1844)] in captivity

摘要: Successful natural spawning of Chaetodontoplus septentrionalis in captivity from 19 March to 11 May, 2008 is described for the first time. A single male dominates a harem two females, with each at dusk, 10 min before 20 min after sunset. Each female laid an average 119 × 103 eggs during period. Fertilized were spherical, buoyant and had diameter 0.83 ± 0.02 mm (mean SD). Embryonic development lasted 15–18 h 28.1 °C. Newly hatched larvae 1.60 0.07 mm total length (TL) 27 myomeres. Larvae completed yolk absorption within 3 days post hatching (ph) 3.01 0.08 mm TL. Ten ph, attained 3.95 0.12 mm fed either 100% s-type rotifers (Brachionus rotundiformis), copepods (Microsetella sp.), combination (50%:50%) or without live feed (starved control) determine effect on survival rate. The was significantly (P<0.001) higher diet than others. These results indicate that C. potential species captive breeding programs use (s-type copepods) may be suitable food larvae.