Spawning behaviour,early development and first feeding of the bluestriped angelfish [Chaetodontoplus septentrionalis (Temminck & Schlegel, 1844)] in captivity |
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| Authors: | Ming‐Yih Leu Pei‐Jie Meng Chao‐Sheng Huang Kwee Siong Tew Jimmy Kuo Chyng‐Hwa Liou |
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| Institution: | 1. Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan;2. Department of Biology, National Museum of Marine Biology & Aquarium, Checheng, Pingtung, Taiwan;3. Graduate Institute of Marine Biodiversity & Evolutionary Biology, National Dong Hwa University, Checheng, Pingtung, Taiwan;4. Institute of Marine Biotechnology, National Dong Hwa University, Checheng, Pingtung, Taiwan |
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| Abstract: | 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 of two females, spawning with each at dusk, from 10 min before to 20 min after sunset. Each female laid an average 119 × 103 eggs during the spawning period. Fertilized eggs were spherical, buoyant and had a diameter of 0.83 ± 0.02 mm (mean ± SD). Embryonic development lasted 15–18 h at 28.1 °C. Newly hatched larvae were 1.60 ± 0.07 mm in total length (TL) with 27 myomeres. Larvae completed yolk absorption within 3 days post hatching (ph) at 3.01 ± 0.08 mm TL. Ten days ph, the larvae had attained 3.95 ± 0.12 mm TL. Larvae were fed either 100% s‐type rotifers (Brachionus rotundiformis), 100% copepods (Microsetella sp.), a combination of the two (50%:50%) or without live feed (starved control) to determine the effect of live feed on the survival rate. The survival was significantly (P<0.001) higher in larvae fed a combination of diet than the others. These results indicate that C. septentrionalis is a potential species for captive breeding programs and the use of a combination of diet (s‐type rotifers and copepods) may be a suitable first food for the larvae. |
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| Keywords: | spawning behaviour larval development first feeding bluestriped angelfish Chaetodontoplus septentrionalis |
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