期刊
JOURNAL OF THE WORLD AQUACULTURE SOCIETY
卷 43, 期 5, 页码 595-606出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1749-7345.2012.00594.x
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- NMMBA [981003031]
The aim of this study was to report the successful results on voluntary spawning of Plectorhinchus vittatus, a description of larval and juvenile development stages, and appropriate first-feed items for pilot-scale larviculture systems. Spontaneous spawning of P. vittatus in captivity from 11 April to 22 June, 2009, was described for the first time. Over a 73-d period, the female produced 49 spawns, 75.1% of which resulted in fertile eggs. The average fecundity per spawn was 4170 eggs (range 20907080 eggs). Fertilized eggs were spherical, buoyant, and had a diameter of 0.80 +/- 0.02 mm (mean +/- SD). Newly hatched larvae were 1.90 +/- 0.06 mm in total length (TL) with 28 myomeres. Transformation of larvae to the juvenile stage was completed at 9.58 +/- 0.69 mm TL. A statistical model: Y = (Xx 0.5034) - (X2x 0.0004) - 0.5883, where Y is mean TL (mm) and X represents days post hatch, explained 99.57% of variation in growth (P < 0.001, R2 = 0.9957). The effects of live feed on survival was significantly (P < 0.05) higher in larvae fed a combination of diet (rotifers, copepods, and Artemia) than the others. These results indicate that P. vittatus is a potential species for captive breeding programs and the use of a combination of diet may be a suitable first food for the larviculture.
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