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大黄鱼脊椎骨的生长发育研究
黄伟卿
宁德市鼎诚水产有限公司
摘要:
为完善大黄鱼的生物和选育以脊椎骨为数量性状的新品种提供理论依据。通过对大黄鱼亲本脊椎骨骨节数量性状统计,并采用软骨—硬骨双染色方法对其繁育子代5~40日龄幼鱼脊椎骨骨节的发育过程进行观察、骨节数量和生长进行统计分析。结果表明:统计亲本48尾, 26个骨节比例为83.3%,27个骨节为12.5%,25个骨节为4.17%。25个骨节的大黄鱼由11个腹椎和14个尾椎组成;26个骨节一种是由11个腹椎和15个尾椎组成,另一种是由12个腹椎和14个尾椎组成;27个骨节的大黄鱼由12个腹椎和15个尾椎组成。在水温24~25℃,盐度25~26‰养殖条件下,亲鱼子代幼体骨节发育至22日龄出现骨化现象, 38日龄完全骨化,骨节数量也出现25个、26个和27个3种,分别占比总数的11.54%、73.08%和15.38%;脊椎骨发育过程中出现了椎骨融合、脉棘和髓棘冗余、分叉以及椎体增生等发育异常现象。骨节的长度(y)与日龄(x1)的关系符合二项式y = 0.0095x2 - 0.0981x + 3.7161(r2 = 0.9607),呈负异速增长的关系,平均增长率为0.295mm/d。
关键词:  大黄鱼  脊椎骨  生长发育
DOI:
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基金项目:
Study on the growth and development of vertebrae of large yellow croaker, Larimichthys crocea
HUANG Weiqing
Ningde Dingcheng Fishery Company Limited
Abstract:
This study provided theoretical basis for improving the biology of large yellow croaker and for breeding new varieties with vertebrae as quantitative characters. In this study, statistics of the spinal joints of the parents large yellow croaker were conducted by chondro-hardbone staining method, and the growth and development of the spinal joints of their offsprings aged 5-40 days were observed, and the number and growth of the vertebral joints were statistically analyzed. Results showed that among 48 parents, 83.3% had 26 nodes, 12.5% had 27 nodes, and 4.17% had 25 nodes.The spine of large yellow croaker with 25 joints consists of 11 abdominal vertebrae and 14 coccyx. There are two types of vertebrae in the large yellow croaker with 26 joints. One is composed of 11 abdominal vertebrae and 15 coccyx; the other is composed of 12 abdominal vertebrae and 14 coccyx. The spine of the large yellow croaker with 27 joints consists of 12 abdominal vertebrae and 15 coccyx. Under the condition of 24-25℃ and 25-26‰, the ossification appeared at the age of 22 days and was completed at the age of 38 days. There are also three types of the number of bone joints (25, 26 and 27), which accounted for 11.54%, 73.08% and 15.38% of the total, respectivley. During the development of vertebrae, there are some abnormal phenomena such as fusion of vertebrae, redundancy and bifurcation of hemal spine and neural spine, and hyperplasia of vertebrae. The relationship between node length (y) and day-age (x1) was y = 0.0095 x2-0.0981 x + 3.7161 (R2 = 0.9607), showing a negative heterotopic growth with an average growth rate of 0.295mm/d.
Key words:  Large yellow croaker  Vertebrae  Growth and development
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