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首页> 外文期刊>Aquaculture Reports >Changes in iodide and thyroid hormone levels of hatchery-reared orange-spotted rabbitfish Siganus guttatus (Bloch 1787) during early larval development
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Changes in iodide and thyroid hormone levels of hatchery-reared orange-spotted rabbitfish Siganus guttatus (Bloch 1787) during early larval development

机译：在幼虫发育期间，孵化器饲养橙色斑点兔子（BLOCH 1787）的碘化物和甲状腺激素水平的变化

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This paper elucidates the developmental profiles of iodide and thyroid hormones, thyroxine (T 4 ) and triiodothyronine (T 3 ) in hatchery-reared rabbitfish ( Siganus guttatus ) during early larval development. The study evaluated the levels of iodide, T 4 and T 3 tissue content in rabbitfish larvae at 0, 10, 20, 30, 40 and 50 days after hatching (DAH). Under normal rearing conditions, iodide (11.98 ± 4.3 nmol g ?1 ) and thyroid hormones (T 4 : 0.09 ± 0.01 nmol g ?1 ; T 3 : 0.01 ± 8.5E-05 nmol g ?1 were already detected from newly-hatched larvae and their presence has been attributed from maternal origin. Iodide level sharply peaked at 10 DAH (1416.43 ± 149.6 nmol g ?1 ) which is significantly higher compared to the iodide levels in the larvae at 20, 30, 40 and 50 DAH. The levels of THs gradually increased as the larvae developed with T 4 (0.96 ± 0.05 nmol g ?1 ) and T 3 (0.03 ± 0.004 nmol g ?1 ) exhibiting a peak on 20 and 30 DAH, respectively, which coincided with the onset of metamorphosis. Thyroid hormone levels gradually decreased which coincided also with the completion of metamorphosis. The present findings indicated a pattern of the rise and fall in iodide and thyroid hormone levels during larval development and its role in metamorphosis of rabbitfish larvae. The study has reported for the first time, the changes in iodide and thyroid hormone levels during the early developmental stage in hatchery-reared rabbitfish and the results are in agreement with those vital actions of thyroid hormones in other fish species.
机译：本文在早期幼虫发育期间阐明了孵化饲养的兔鱼（SIGANUSGUTTATUS的甲状腺激素，甲状腺素（T 4）和三碘噻吩（T 3）的发育谱。该研究评估了在孵化（DAH）之后0,10,20,30,40和50天的兔幼虫幼虫中碘化物，T 4和T 3组织含量的水平。在正常的饲养条件下，碘化物（11.98±4.3 nmol g？1）和甲状腺激素（t 4：0.09±0.01 nmolg≤1; t 3：0.01±8.5e-05 nmolg≤1，从新孵化中检测到幼虫及其存在归因于产妇起源。碘化物水平在10dah（1416.43±149.6nmol g'1）上达到尖锐的峰值，其与幼虫在20,30,40和50 dah的碘化物水平相比显着高。该随着T 4（0.96±0.05 nmolg≤1）和T 3（0.03±0.004 nmolg≤1）的幼虫分别逐渐增加（0.03±0.004 nmolg≤1），分别在20和30dah上分别均匀地升高变态。甲状腺激素水平逐渐降低，其结合在变态的情况下恰逢。目前的研究结果表明了幼虫发育期间碘化物和甲状腺激素水平的兴起和下降的模式及其在兔鱼幼虫的变态中的作用。该研究报告了第一次，碘化物的变化和在孵化场饲养的兔子早期发育阶段的甲状腺激素水平和结果与其他鱼类中的甲状腺激素的重要作用一致。

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