Swimming physiology of European silver eels (Anguilla anguilla L.): energetic costs and effects on sexual maturation and reproduction.
Swimming physiology of European silver eels (Anguilla anguilla L.): energetic costs and effects on sexual maturation and reproduction.
复制标题
DOI：
10.1007/s10695-010-9397-4
复制
发表时间：
2010-09
影响因子：
2.9
通讯作者：
van den Thillart, Guido E. E. J. M.
中科院分区：
文献类型：
--
作者：
Palstra, Arjan P.;van den Thillart, Guido E. E. J. M.
关键词：
欧洲鳗鱼迁徙5000 - 6000公里到马尾藻海繁殖。由于它们在青春期前进入海洋，并在游泳数月后繁殖，因此游泳和性成熟之间存在强烈的相互作用。在22个游泳隧道中进行了许多游泳试验，以阐明其性能和对成熟的影响。欧洲鳗鱼能够以10-12毫克脂肪/公里的成本长距离游泳，这比鲑鱼高4-6倍。繁殖的总能量成本相当于脂肪储存的67%。在长距离游泳过程中，身体成分保持不变，这表明能量消耗的计算不能仅仅基于脂肪，而是需要补偿蛋白质氧化。最佳游泳速度为0.61-0.67 m s-1，比通常假设的巡航速度0.4 m s-1高出约60%，这意味着雌性鳗鱼可能在3.5个月内到达马尾藻海，而不是假设的6个月。游泳试验表明，脂质沉积和卵母细胞生长，这是性成熟的第一步。为了研究海洋迁移对成熟的影响，我们在一个大的游泳槽中用海水模拟了群体迁移。这些试验显示雌性中促性腺激素表达和卵黄发生受到抑制，而相反，在银雄性中观察到持续的性成熟。诱导卵母细胞中的脂质沉积和抑制卵黄发生的女性游泳表明一个自然的事件序列完全不同的人工成熟协议。
The European eel migrates 5,000–6,000 km to the Sargasso Sea to reproduce. Because they venture into the ocean in a pre-pubertal state and reproduce after swimming for months, a strong interaction between swimming and sexual maturation is expected. Many swimming trials have been performed in 22 swim tunnels to elucidate their performance and the impact on maturation. European eels are able to swim long distances at a cost of 10–12 mg fat/km which is 4–6 times more efficient than salmonids. The total energy costs of reproduction correspond to 67% of the fat stores. During long distance swimming, the body composition stays the same showing that energy consumption calculations cannot be based on fat alone but need to be compensated for protein oxidation. The optimal swimming speed is 0.61–0.67 m s−1, which is ~60% higher than the generally assumed cruise speed of 0.4 m s−1 and implies that female eels may reach the Sargasso Sea within 3.5 months instead of the assumed 6 months. Swimming trials showed lipid deposition and oocyte growth, which are the first steps of sexual maturation. To investigate effects of oceanic migration on maturation, we simulated group-wise migration in a large swim-gutter with seawater. These trials showed suppressed gonadotropin expression and vitellogenesis in females, while in contrast continued sexual maturation was observed in silver males. The induction of lipid deposition in the oocytes and the inhibition of vitellogenesis by swimming in females suggest a natural sequence of events quite different from artificial maturation protocols.
登录
查看更多内容
影响因子：
56.9
作者：
Aarestrup, Kim;Okland, Finn;McKinley, Robert S.
通讯作者：
McKinley, Robert S.
影响因子：
1.9
作者：
Chow, Seinen;Kurogi, Hiroaki;Tsukamoto, Katsumi
通讯作者：
Tsukamoto, Katsumi
影响因子：
2
作者：
COLOMBO, G;GRANDI, G;ROSSI, R
通讯作者：
ROSSI, R
影响因子：
3.6
作者：
Biran, Jakob;Ben-Dor, Shifra;Levavi-Sivan, Berta
通讯作者：
Levavi-Sivan, Berta
DOI：
10.1139/cjfas-54-8-1916
发表时间：
1997-08-01
影响因子：
2.4
作者：
Couillard, CM;Hodson, PV;Castonguay, M
通讯作者：
Castonguay, M