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Temperature and food availability alters the physiology and aerobic capacity of tambaqui (Colossoma macropomum).
Comparative Biochemistry and Physiology A: Molecular & Integrative Physiology ( IF 2.3 ) Pub Date : 2020-04-11 , DOI: 10.1016/j.cbpa.2020.110704
Danilo da Costa Barroso 1 , Vera Maria Fonseca Almeida-Val 1 , Adalberto Luis Val 1
Affiliation  

Fish of the Amazon experience both daily and seasonal variation in temperature and food availability. In the present work, we investigated the influence of nutrient status changes resulting from feeding Colossoma macropomum five flooded forest fruits on aerobic and swimming performance. To assess the effects of diet, three groups of fish were provided different types of food. One group of was provided with commercial feed, another was given fruit feed, and the last group was not fed. The effects of temperature were tested by keeping half of each group of animals at either 26 °C or 33°C for 30 days. After this period, the animals were transferred to either a respiratory chamber or swimming tunnel. Then, tissues were collected for relevant analyses. Results showed that C. macropomum depresses aerobic metabolism when food is withheld (27% reduction in ṀO2), and observed effects were intensified at the highest temperature (40% reduction in ṀO2 at 33 °C). Further, increased temperature negatively influenced hematological (Ht, Hb, VCM), biochemical (glucose, triglycerides, cholesterol), hepatossomatic index and enzymatic (MDH and CS in white muscle) parameters. The animals feeding commercial and fruits enriched diets, have a physiological and biological advantage when compared to the unfed animals at both temperatures. Metabolic suppression is an important strategy for maintaining swimming capacity in C. macropomum. It is suggested that even after a long period of fasting, carbohydrates are important energetic substrates.

中文翻译:

温度和食物的供应量会改变tambaqui(巨像)的生理和有氧能力。

亚马逊河的鱼在温度和食物供应方面每天和季节性都会变化。在目前的工作中,我们调查了饲喂五瓣巨水淹没的森林果实导致的营养状况变化对有氧运动和游泳性能的影响。为了评估饮食的效果,向三组鱼提供了不同类型的食物。一组提供商业饲料,另一组提供水果饲料,而最后一组不提供饲料。通过将每组动物的一半在26°C或33°C下放置30天来测试温度的影响。在此期间之后,将动物转移到呼吸室或游泳隧道。然后,收集组织进行相关分析。结果表明C. 当不食用食物时,大po抑制有氧代谢(ṀO2减少27%),在最高温度下(33°CṀO2减少40%),所观察到的效果增强。此外,温度升高对血液学(Ht,Hb,VCM),生化(葡萄糖,甘油三酸酯,胆固醇),肝体指数和酶学(白肌肉中的MDH和CS)参数产生负面影响。与两种温度下的未喂养动物相比,饲喂商业和富含水果饮食的动物具有生理和生物学优势。代谢抑制是维持大型梭菌游泳能力的重要策略。建议即使长时间禁食,碳水化合物也是重要的能量底物。在最高温度下(33°C时ṀO2降低40%)增强了观察到的效果。此外,温度升高对血液学(Ht,Hb,VCM),生化(葡萄糖,甘油三酸酯,胆固醇),肝体指数和酶学(白肌肉中的MDH和CS)参数产生负面影响。与两种温度下的未喂养动物相比,饲喂商业和富含水果饮食的动物具有生理和生物学优势。代谢抑制是维持大型梭菌游泳能力的重要策略。建议即使长时间禁食,碳水化合物也是重要的能量底物。在最高温度下(33°C时ṀO2降低40%)增强了观察到的效果。此外,温度升高对血液学(Ht,Hb,VCM),生化(葡萄糖,甘油三酸酯,胆固醇),肝体指数和酶学(白肌肉中的MDH和CS)参数产生负面影响。与两种温度下的未喂养动物相比,饲喂商业和富含水果饮食的动物具有生理和生物学优势。代谢抑制是维持大型梭菌游泳能力的重要策略。建议即使长时间禁食,碳水化合物也是重要的能量底物。肝体指数和酶(白肌肉中的MDH和CS)参数。与两种温度下的未喂养动物相比,饲喂商业和富含水果饮食的动物具有生理和生物学优势。代谢抑制是维持大型梭菌游泳能力的重要策略。建议即使长时间禁食,碳水化合物也是重要的能量底物。肝体指数和酶(白肌肉中的MDH和CS)参数。与两种温度下的未喂养动物相比,饲喂商业和富含水果饮食的动物具有生理和生物学优势。代谢抑制是维持大型梭菌游泳能力的重要策略。建议即使长时间禁食,碳水化合物也是重要的能量底物。
更新日期:2020-04-20
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