Shengjie ZHOU, Rui YANG, Gang YU, Zhenhua MA. Study on relationship between body length and blood index of juvenile yellowfin tuna (Thunnus albacores)[J]. South China Fisheries Science, 2021, 17(5): 126-132. DOI: 10.12131/20210052
Citation: Shengjie ZHOU, Rui YANG, Gang YU, Zhenhua MA. Study on relationship between body length and blood index of juvenile yellowfin tuna (Thunnus albacores)[J]. South China Fisheries Science, 2021, 17(5): 126-132. DOI: 10.12131/20210052

Study on relationship between body length and blood index of juvenile yellowfin tuna (Thunnus albacores)

  • 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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