水生生物学报Issue(1)：1-9,9.DOI:10.7541/2014.01
鸭绿江唇仔、稚鱼形态发育与早期生长
MORPHOLOGICAL DEVELOPMENT AND EARLY GROWTH ON LARVAE AND JUVENILES OFHEMIBARBUS LABEOIN YALÜ RIVER
摘要
Abstract
We studied the morphological development and early growth of larval and juvenileHemibarbus labeo in Yalü River from hatching till 43 days. The newly hatched larvae were (7.92±0.29) mm under the temperature of 19.6-25.8℃. Sensor buds were differentiated on both sides of the head 2 days after hatching (DAH) and posterior swim bladder anlage appeared on Day 3 after hatching (AH). Initial feeding appeared on Day 5 AH along with the appearance of spleen and the complete absorption of yolk sphere on Day 7 AH. The caudal tip of the notochord started to curve upward on Day 9 AH, followed by the anterior swim bladder appearance on Day 10 AH. For 14-day-old larva, the caudal folk formed and the notochord stopped curving upward. Scales were found to be appeared at the back of the operculum and all fins were well-developed on Day 32 AH that the larvae reached the juvenile stage. The entire body was covered by the scales on Day 43 AH while the fry reached the young stage. Based on morphological changes in yolk sphere, noto-chord, and scale, the post-embryonic development ofH. labeo can be classified into 5 stages: the yolk-sac stage (0-6 DAH), the preflexion stage (7-9 DAH), the fexion stage (10-14 DAH), the post flexion stage (15-32 DAH), and the juvenile stage (33-43 DAH). From hatching till Day 43 AH, the special growth rate of total length and body weight was 3.32% and 12.16%, respectively. The absorption of yolk sphere can be calculated through the equation:V=0.0048d3-0.0309d2-0.1240d+0.8453 (R2=0.8933); whereV =yolk-sac volume in mm3 andd = age in days. The ap-propriate equations for growth in the total length (LT) and body weight (W) of larval and juvenileH. labeo were as fol-lows:LT=8.3821e0.0329d (R2=0.9586), andW=0.0048e0.0969d (R2=0.9463). In addition, the head length (LH) and body height (HB) can be calculated by the following equations:LH = -6E-05d3+0.002d2+0.1733d+0.7862 (R2=0.9577) and HB= -5E-05d3 + 0.0039d2+ 0.017d + 0.9389 (R2= 0.9621), respectively.关键词
鸭绿江唇/仔鱼/稚鱼/形态发育/早期生长Key words
Hemibarbus labeo/Larvae/Juvenile/Morphological development/Early growth分类
农业科技引用本文复制引用
杨培民,骆小年,金广海,刘义新,李敬伟,李军..鸭绿江唇仔、稚鱼形态发育与早期生长[J].水生生物学报,2014,(1):1-9,9.基金项目
辽宁省重大、重点项目“渔业新品种引进、开发”(2008203001)资助 （2008203001）
