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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Seasonal, ontogenetic and sexual changes in lipid metabolism of the small-spotted catshark (Scyliorhinus canicula) in deep-sea free-living conditions
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Seasonal, ontogenetic and sexual changes in lipid metabolism of the small-spotted catshark (Scyliorhinus canicula) in deep-sea free-living conditions

机译：深海自由生活条件下小斑点-（Scyliorhinus canicula）脂质代谢的季节性，个体发生和有性变化

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摘要

Marine predators, such as elasmobranchs, exhibit variations in nutritional conditions related to both reproductive traits and food availability in the marine environment throughout the year. The main objective of this study was to examine changes in several blood physiological parameters in a demersal shark, the small-spotted catshark (Scyliorhinus canicula), in the wild in relation to season, sex and maturity stage. For this purpose, 108 individuals at different deKelopmental stages were captured and released alive in the western Mediterranean. Blood was obtained from caudal vessels and plasma lipid fractions (total cholesterol, triglycerides and phospholipids) and a ketone body (3-beta-hydroxybutyrate) were measured. During summer, plasma triglyceride and phospholipid levels were lower in adults than in juveniles (mainly in females, probably related to breeding season and laying eggs). Plasma cholesterol levels also showed higher values in summer, indicating higher physical activities during summer and revealing that lipid fractions are more related to reproduction than to nutrition. Plasma 3-beta-hydroxybutyrate variations showed a different pattern. No differences were found between sex or maturity stage during summer, although the highest values in adult and juvenile males during winter indicates higher physical activity of males. This study, uses an innovative methodology to establish a correlation between lipid fractions and ketone bodies from the blood of wild individuals and changes in sexual and nutritional status. This method was conducted without damage to the target species and provides new information on the physiology of this abundant elasmobranch in the Mediterranean Sea. (C) 2016 Elsevier B.V. All rights reserved.
机译：全年，海洋捕食者（例如，弹性bra）在营养条件方面表现出与生殖性状和海洋环境中的食物供应量有关的变化。这项研究的主要目的是研究野鲨在深海中与季节，性别和成熟阶段有关的几种血液生理参数的变化，即小斑点cat（Scyliorhinus canicula）。为此，在地中海西部捕获并分离了处于不同发育阶段的108个人。从尾血管中获取血液，并测量血浆脂质成分（总胆固醇，甘油三酸酯和磷脂）和酮体（3-β-羟基丁酸酯）。夏季，成年人血浆甘油三酸酯和磷脂水平低于少年（主要是雌性，可能与繁殖季节和产卵有关）。夏季血浆胆固醇水平也显示出较高的值，表明夏季期间的体育活动较高，这表明脂质成分与生殖比营养更相关。血浆3-β-羟基丁酸酯变异显示出不同的模式。尽管冬季成年男性和少年男性的最高值表明男性的身体活动量较高，但夏季的性别或成熟阶段之间没有差异。这项研究使用一种创新的方法来建立野生个体血液中脂质成分与酮体之间的相关性以及性和营养状况的变化。该方法在不破坏目标物种的情况下进行，并提供了有关地中海丰富的弹s的生理学的新信息。 （C）2016 Elsevier B.V.保留所有权利。

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