Reduced growth may be linked to lower aerobic scope in juvenile triploid white sturgeon (Acipenser transmontanus)
Reduced growth may be linked to lower aerobic scope in juvenile triploid white sturgeon (Acipenser transmontanus)
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DOI：
10.1016/j.aquaculture.2020.736157
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发表时间：
2021-03
期刊：
影响因子：
4.5
通讯作者：
M. J. Leal;J. P. Eenennaam;A. Schreier;A. Todgham
中科院分区：
文献类型：
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作者：
M. J. Leal;J. P. Eenennaam;A. Schreier;A. Todgham
先前的研究提供了减少有氧代谢能力的证据，无论是在细胞（代谢酶活性）和整个有机体（有氧范围）水平的少年三倍体白色鲟鱼，二倍体同胞相比。这种代谢能力降低的下游成本仍然不清楚，但较低的有氧范围表明三倍体白色鲟鱼可能有较少的能量分配给生长和发育等生物过程。我们进行了为期15周的生长试验，以评估2个月大的二倍体和三倍体白色鲟鱼体细胞生长的能量分配。自发游泳活动，hepatosomatic指数，条件因素，和畸形也测量整个生长试验的能量分配活动和鱼的条件的指数。在一般情况下，我们的研究结果表明，三倍体白色鲟鱼可能有更少的能量可用于基础维护以外的过程。这可能与整体性能降低有关，如与二倍体对应物相比，体重较低和畸形较多。然而，许多指数仍然是大部分不受三倍体（条件因素，肝指数，游泳活动）。幼年三倍体白色鲟鱼的这种较低的生长表现是否会持续到亚成年期、青春期和最终成熟，需要进一步的长期研究。
Previous studies have provided evidence of a reduced aerobic metabolic capacity, both at the cellular (metabolic enzyme activity) and the whole organism (aerobic scope) level in juvenile triploid white sturgeon, compared to diploid siblings. The downstream costs of this reduced metabolic capacity are still unclear, yet a lower aerobic scope suggests triploid white sturgeon likely have less energy to allocate to biological processes like growth and development. We conducted a 15-week growth trial to assess energy allocation to somatic growth in 2-month-old diploid and triploid white sturgeon. Spontaneous swimming activity, hepatosomatic index, condition factor, and deformities were also measured throughout the growth trial as indices of energy allocation to activity and fish condition. In general, our results indicate that triploid white sturgeon may have less energy available for processes beyond basal maintenance. This could be linked to a reduced overall performance as evidenced by lower weights and more deformities when compared with their diploid counterparts. However, many indices were still mostly unaffected by triploidy (condition factor, hepatosomatic index, and swimming activity). Whether this lower growth performance seen in juvenile triploid white sturgeon continues through sub-adulthood, puberty and final maturation requires further long-term studies.