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| Observation of Embryonic and Early Larval Development of Schizothorax wangchiachii |
| LIU Yang,ZHU Tingbing,WU Xingbing,YAN Wenbin,YANG Deguo |
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Abstract The embryonic and larval development was observed in fertilized eggs of Schizothorax wangchi‐achii collected via artificial reproduction in December of 2014 .It was found that the mature eggs was light yellow in color ,and had diameter of (3 .18 ± 0 .17) mm and (3 .96 ± 0 .25) mm via water absorption .The blastodisc stage was observed in 3 .17 h ,and then the blastula and gastrula stages began in 16 h and 47 h , and the neural plate stage appeared in 60 .67 h ,and the myomere occurred in 74 .67 h at water temperature of 19-21 ℃ ,with an average of 13 .68 ℃ .The fertilized eggs were hatched in 192 .5 h ,with the sum ef‐fective accumulative temperature of 2633 .68 h · ℃ .The newly hatched larvae had total length of (10 .88 ± 0 .41) mm ,inflated air bladder to swim horizontally and exhausted yolk sac in 13 d and 18 d post hatching , indicating that there was to some extent differences in the characteristics of embryonic development be‐tween S .w angchiachii and the other members in Schizothoracinae .
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Received: 25 November 2015
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