Dvoretsky Alexander G, Tipisova Elena V, Alikina Viktoria A, Elfimova Aleksandra E, Dvoretsky Vladimir G
Murmansk Marine Biological Institute of the Russian Academy of Sciences (MMBI RAS), 183010 Murmansk, Russia.
N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of Sciences (FECIAR UrB RAS), 163000 Arkhangelsk, Russia.
Animals (Basel). 2022 Feb 4;12(3):379. doi: 10.3390/ani12030379.
Only a few studies have reported the presence and levels of thyroid hormones in invertebrates. At the same time, the administration of these hormones has been shown to be a profitable method for inducing growth in crustaceans. Knowledge of thyroid hormone concentrations is required to involve this approach in crustacean aquaculture. For this reason, we examined hemolymph samples of the invasive red king crab from the Barents Sea population for the levels of triiodothyronine (T3) and thyroxine (T4). Radioimmunoassays indicated that T3 ranged from 0.26 to 1.55 μg dL, whereas T4 varied from 52 to 203 μg dL. Adult crabs demonstrated higher levels of T3 than juveniles, while juvenile crabs had higher levels of T4 in comparison to larger conspecifics. The thyroxine levels were consistent throughout the study period. In contrast, significant seasonal variations were found for T3. In immature crabs, the maximum concentration was found in October, whereas in adult crabs, the highest level of T3 was registered in August. Most likely, these results are explained by changes in physiological conditions of the crabs associated with their molting calendar and migration activity. Our data may have important implications for aquaculture of in the Barents Sea.
仅有少数研究报道了无脊椎动物体内甲状腺激素的存在情况及水平。与此同时，已证明施用这些激素是促进甲壳类动物生长的一种有效方法。要将这种方法应用于甲壳类水产养殖，需要了解甲状腺激素的浓度。因此，我们检测了来自巴伦支海种群的入侵红王蟹的血淋巴样本中的三碘甲状腺原氨酸（T3）和甲状腺素（T4）水平。放射免疫分析表明，T3的范围为0.26至1.55μg/dL，而T4的范围为52至203μg/dL。成年蟹的T3水平高于幼蟹，而幼蟹的T4水平高于体型较大的同种个体。在整个研究期间，甲状腺素水平保持一致。相比之下，T3存在显著的季节性变化。在未成熟的蟹中，10月发现T3浓度最高，而在成年蟹中，8月T3水平最高。这些结果很可能是由蟹的生理状况变化所导致的，这些变化与其蜕皮周期和洄游活动有关。我们的数据可能对巴伦支海的水产养殖具有重要意义。
