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首页> 外文期刊>Fish Physiology and Biochemistry >Tryptophan supplementation helps totoaba (Totoaba macdonaldi) juveniles to regain homeostasis in high-density culture conditions
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Tryptophan supplementation helps totoaba (Totoaba macdonaldi) juveniles to regain homeostasis in high-density culture conditions

机译：色氨酸补充有助于Totoaba（Totoaba麦克唐纳）青少年来重新获得高密度培养条件的稳态

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摘要

High-density culture brings with it chronic stress situations that affect fish welfare. In order to evaluate the effect of tryptophan (Trp) levels on the response to stress, Totoaba macdonaldi juveniles were stocked at low (13.5 kg m(-3)) and high (27.0 kg m(-3)) densities (32.5 and 56.4 kg m(-3), respectively, at the end of the experiment) in 100-L tanks and fed for 63 days with experimental diets containing different Trp levels: control diet CD0.42 (0.42%) and three supplemented diets with 0.99, 1.55 and 2.19% (0.99Trp, 1.55Trp and 2.19Trp, respectively) (three tanks x density x diet). The high-density stocking fed with CD0.42 diets showed significantly increased blood parameters. Trp decreased catalase (CAT) activity in low- and high-density stocking, while the superoxide dismutase (SOD) activity showed no difference. Serotonin (5-hydroxytryptamine, 5-HT) content decreased, and the serotonin turnover ratio (5-HIAA:5-HT) increased in the brains of fish fed with the CD0.42 diet. Indeed, Trp-supplemented diets helped to restore homeostasis in high-density growth conditions as evaluated by the hematological and plasma parameters as well as the serotonergic activity. When the fish were provided a diet containing moderate Trp levels, plasma cortisol increased under high-density conditions. However, no differences were observed among stock densities when totoaba were fed with the 2.19Trp diet. Notably, survival was unaffected by both Trp or densities, but weight gain (WG) decreased with the dietary Trp levels in the high density culture. In sum, Trp supplementation decreased the parameter values linked to stress response on totoaba juveniles cultured at high stock densities.
机译：高密度培养带来了影响鱼类福利的慢性胁迫情况。为了评估色氨酸（TRP）水平对应力响应的影响，Totoaba麦克诸尔德幼虫在低（13.5kg m（-3））和高（27.0kg m（-3））密度（32.5和56.4） Kg M（-3）分别在实验结束时）在100升坦克中，用含有不同TRP水平的实验饮食喂养63天：对照饮食CD0.42（0.42％）和三个补充饮食，0.99， 1.55和2.19％（0.99tRP，1.55TRP和2.19TRP）（三个坦克X密度X饮食）。用CD0.42饮食喂养的高密度放养显示出显着增加的血液参数。 TRP在低密度和高密度储量中减少过氧化氢酶（猫）活性，而超氧化物歧化酶（SOD）活性没有差异。血清素（5-羟基 - 羟基胺，5-HT）含量下降，喂食CD0.42饮食的鱼大脑中血清素周转率（5-HiaA：5-HT）增加。实际上，补充了TRP的饮食有助于恢复高密度生长条件下的稳态，如通过血液学和血浆参数的评估以及血清on ondenserciC活性。当提供含有中度TRP水平的饮食时，在高密度条件下增加血浆皮质醇。然而，当Totoaba喂食2.19TRP饮食时，股票密度没有观察到差异。值得注意的是，存活不受TRP或密度的影响，但体重增加（WG）随着高密度培养的膳食TRP水平降低。总之，TRP补充减少了在高股股密度培养的Tot​​oaba幼虫对压力响应相关的参数值。

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  • 来源
    《Fish Physiology and Biochemistry》 |2020年第2期|共15页
  • 作者

    Cabanillas-Gamez Miguel; Bardullas Ulises; Galaviz Mario A.; Rodriguez Sergio; Rodriguez Veronica M.; Lopez Lus M.;

  • 作者单位

    Univers Autonoma Baja Calif Facultad Ciencias Marinas UABC Carretera Tijuana-Ensenada 3917 Playitas Ensenada 22860 B.c. Mexico;

    Univers Autonoma Baja Calif Facultad Ciencias UABC Carretera Tijuana-Ensenada 3917 Playitas Ensenada 22860 B.c. Mexico;

    Univers Autonoma Baja Calif Facultad Ciencias Marinas UABC Carretera Tijuana-Ensenada 3917 Playitas Ensenada 22860 B.c. Mexico;

    Univers Nacl Autonoma Mex Facultad Quim Unidad Quim Sisal Puerto Abrigo S/N Sisal Hunucma 97356 Yucatan Mexico;

    Univers Nacl Autonoma Mex Departamento Neurobiol Conductual Cognit Instituto Neurobiol Blvd Juriquilla 3001 Queretaro 76230 Queretaro Mexico;

    Univers Autonoma Baja Calif Facultad Ciencias Marinas UABC Carretera Tijuana-Ensenada 3917 Playitas Ensenada 22860 B.c. Mexico;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 水产、渔业;
  • 关键词

    Chronic stress; High density; Homeostasis; Totoaba; Tryptophan;

    机译：慢性应激;高密度;稳态;Totoaba;色氨酸;

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