Study on relationship between body length and blood index of juvenile yellowfin tuna (Thunnus albacores)
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摘要: 为积累人工养殖黄鳍金枪鱼 (Thunnus albacores) 幼鱼基础生理指标数据,该研究测定了不同体长黄鳍金枪鱼幼鱼 (20G组: 20~30 cm; 30G组: 30~40 cm; 40G组: 40~50 cm) 血液钾离子 (K+)、钙离子 (Ca2+)、氯离子 (Cl−)、氢离子 (H+)、pH、葡萄糖、乳酸、钠离子 (Na+) 和总血红蛋白浓度以及红细胞比容和渗透压。结果显示,黄鳍金枪鱼幼鱼K+、Ca2+、Cl−、H+、pH、葡萄糖、红细胞比容数据组间差异不显著 (P>0.05)。20G组的乳酸和总血红蛋白均显著高于其他两组 (P<0.05);30G组的标准化Ca2+显著高于其他两组 (P<0.05);Na+浓度随着体长的增加逐渐下降,相邻两组间差异不显著 (P>0.05)。结果表明,黄鳍金枪鱼幼鱼在3个体长组中血液指标较稳定,在30G和40G两组之间差异较小,20G组与其他两组差异相对较大,随着体长的增加,血液指标趋于更稳定。Abstract: In order to accumulate the basic physiological index data for juvenile yellowfin tuna (Thunnus albacores), we evaluated the blood potassium ion (K+), calcium ion (Ca2+), chloride ion (Cl−), hydrogen ion (H+), pH, glucose, lactic acid, sodium ion (Na+) and total hemoglobin concentration and hematocrit, osmotic pressure of the juveniles of different body lengths (20G: 20−30 cm, 30G: 30−40 cm, 40G: 40−50 cm). Results indicate that the blood parameters of the juveniles were relatively stable in the three body length groups. K+, Ca2+, Cl−, H+, pH, glucose and hematocrit were not significantly different between groups (P>0.05). The content of lactic acid and total hemoglobin concentration in the 20G group was significantly higher than the other two groups (P<0.05). The standardized calcium ion in the 30G group was significantly higher than the other two groups (P<0.05). The sodium ion content decreased with the increase of body length gradually, and the difference between the adjacent two groups was not significant (P>0.05). The results show that the juveniles had a small difference between the 30G and 40G groups. The 20G group was relatively different from the other two groups. As body length increased, blood indicators tended to be more stable.
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Key words:
- Yellowfin tuna (Thunnus albacores) /
- Body length /
- Blood index /
- Blood gas analysis
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图 1 黄鳍金枪鱼幼鱼主要离子浓度与体长关系
Osm为渗透单位;不同字母表示差异显著 (P<0.05),反之差异不显著 (P>0.05),后图同此。
Figure 1. Relationship between main ion concentration and body length of juvenile yellowfin tuna
Osm is the unit of penetration; different and the same letters indicate significant difference (P<0.05) and insignificant difference (P>0.05). The same in the following figures.
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