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首页> 外文期刊>Journal of Fish Biology >Red muscle proportions and enzyme activities in deep-sea demersal fishes
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Red muscle proportions and enzyme activities in deep-sea demersal fishes

机译：深海深海鱼类的红色肌肉比例和酶活性

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摘要

Owing to the paucity of data on the red muscle of deep-sea fishes, the goal of this study was to determine the proportions of red muscle in demersal fishes and its enzymatic activities to characterize how routine swimming abilities change with depths of occurrence. Cross sectional analysis of the trunk musculature was used to evaluate the proportion of red muscle in 38 species of Californian demersal fishes living at depths between 100 and 3000m. The activity of metabolic enzymes was also assayed in a sub-set of 18 species. Benthic fishes had lower proportions of red muscle and lower metabolic enzyme activities than benthopelagic species. Mean proportion of red muscle declined significantly with depth with the greatest range of values in shallow waters and species with low proportions found at all depths. This suggested that while sedentary species occur at all depths, the most active species occur in shallow waters. Citrate synthase activity declined significantly with depth across all species, indicating that the mass-specific metabolic capacity of red muscle is lower in deep-sea species. These patterns may be explained by coupling of red and white muscle physiologies, a decrease in physical energy of the environment with depth or by the prevalence of anguilliform body forms and swimming modes in deep-living species.
机译：由于有关深海鱼类红色肌肉的数据很少，因此本研究的目的是确定深海鱼类红色肌肉的比例及其酶活性，以表征常规游泳能力如何随着发生深度的变化而变化。使用躯干肌肉组织的横截面分析来评估生活在100至3000m之间的38种加利福尼亚深海鱼类中红色肌肉的比例。还在18种亚组中测定了代谢酶的活性。底栖鱼类比角鲨鱼类的红色肌肉比例较低，代谢酶活性较低。红色肌肉的平均比例随深度显着下降，在浅水区和在所有深度都发现比例较低的物种中，其值的最大范围。这表明虽然久坐的物种分布在所有深度，但最活跃的物种分布在浅水区。在所有物种中，柠檬酸合酶活性随深度的增加而显着下降，表明深海物种中红色肌肉的质量比代谢能力较低。这些模式可以通过红色和白色肌肉生理学的结合，深度上环境的物理能量的减少或深层生物物种中gu状动物的体型和游泳方式的流行来解释。

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