PERFORMANCE OF TRIPLOID PACIFIC OYSTERS, CRASSOSTREA-GIGAS (THUNBERG) .1. SURVIVAL, GROWTH, GLYCOGEN-CONTENT, AND SEXUAL-MATURATION IN YEARLINGS
PERFORMANCE OF TRIPLOID PACIFIC OYSTERS, CRASSOSTREA-GIGAS (THUNBERG) .1. SURVIVAL, GROWTH, GLYCOGEN-CONTENT, AND SEXUAL-MATURATION IN YEARLINGS
复制标题
DOI：
10.1016/0022-0981(86)90176-0
复制
发表时间：
1986-11-28
影响因子：
2
通讯作者：
DOWNING, SL
中科院分区：
文献类型：
--
作者：
ALLEN, SK;DOWNING, SL
用细胞松弛素B处理新受精卵，获得三倍体太平洋牡蛎(Crassostrea Gias Thunberg)，在田间种植三倍体和二倍体种苗，一年后在繁殖期取样。以横截面积衡量，三倍体雄性产生的性腺是二倍体的一半，三倍体雌性的性腺是二倍体的四分之一。性腺生成减少影响生长和糖原利用。在整个生殖过程中，三倍体呈线性增长，而二倍体在产卵前几乎没有增长，体重下降了%，随后二倍体和三倍体平行生长。二倍体表现出典型的糖原利用模式，产卵前糖原占干重的比例最低，为4.8%，产卵后糖原占干重的比例逐渐增加。三倍体的糖原水平也有所下降，但下降的速度较慢；二倍体低谷后的2个月内，三倍体的糖原水平继续下降。三倍体的存活率高于二倍体，但这可能不是性成熟减少的结果。在三倍体牡蛎中观察到的部分生殖不育对生殖生理有很大影响。三倍体在生理能量学研究中可能是一种有价值的工具，可以用来划分体细胞和生殖努力。
Triploid Pacific oysters (Crassostrea gigas Thunberg) were produced by treating newly fertilized eggs with cytochalasin B. Triploid and diploid spat were planted in the field and, 1 yr later, sampled during the reproductive period. As measured by cross-sectional area, triploid males produced half as much and triploid females a quarter as much gonad as diploids. Reduced gonadogenesis affected the growth and glycogen utilization. Triploids grew linearly through the period of reproduction, whereas diploids grew little until spawning when weight decreased by 64%; growth of diploids and triploids was parallel subsequently. Diploids showed a typical pattern of glycogen utilization, reaching a low of 4.8% glycogen as dry weight prior to spawning and increasing thereafter. Glycogen levels in triploids also declined, but at a slower rate; glycogen in triploids continued to decline for 2 months after the diploid nadir. Triploids had higher survival rates than diploids, but this is probably not a consequence of reduced sexual maturation. Partial reproductive sterility observed in triploid oysters greatly affects reproductive physiology. Triploidy may be a valuable tool in studies of physiological energetics to partition somatic and reproductive effort.