Effects of food deprivation state on feeding behavior and gastric evacuation of rock crabs, Cancer irroratus, during hypoxia

IF 0.9 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Marine and Freshwater Behaviour and Physiology Pub Date : 2022-06-18 DOI:10.1080/10236244.2022.2089570

Qiwu Jiang, I. McGaw

引用次数: 2

Abstract

ABSTRACT Climate change and anthropological activities have led to an expansion of hypoxia into the natural habitat of Cancer irroratus. In this study, we examined the effects of hypoxia and food deprivation state on food intake and subsequent gastric processing. Three different techniques were used to measure food intake. The gravimetric analysis of dry food pellets was the most accurate method. In severe hypoxia (20% oxygen), rock crabs reduced food intake, and more crabs refused to eat. Compared with fasted crabs, more starved crabs tended to eat in severe hypoxia. Subsequently, prolonged gastric emptying times paralleled the previously measured postprandial oxygen consumption in hypoxia. Starved crabs also exhibited slightly longer transit times for digesta compared with fasted crabs. These results suggest that although a trade-off may occur in starved rock crabs between the need to procure nutrients and deal with hypoxic stress, impaired digestive processing may still deleteriously affect these animals.

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缺氧条件下食物剥夺状态对岩蟹摄食行为和胃排空的影响

气候变化和人类活动导致了低氧环境在巨蟹座自然栖息地的扩展。在这项研究中，我们研究了缺氧和食物剥夺状态对食物摄入和随后的胃加工的影响。研究人员使用了三种不同的技术来测量食物摄入量。干燥食品微丸的重量分析是最准确的方法。在严重缺氧(20%氧气)的情况下，岩蟹减少了食物摄入量，更多的蟹拒绝进食。与禁食的螃蟹相比，更饥饿的螃蟹倾向于在严重缺氧的情况下进食。随后，延长的胃排空时间与先前测量的餐后缺氧耗氧量相似。与禁食的螃蟹相比，饥饿的螃蟹也表现出稍长的消化时间。这些结果表明，尽管饥饿的岩蟹可能会在获取营养和应对缺氧压力之间进行权衡，但消化过程受损仍可能对这些动物产生有害影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine and Freshwater Behaviour and Physiology 生物-海洋与淡水生物学

CiteScore

2.10

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Marine and Freshwater Behaviour and Physiology is devoted to the publication of papers covering field and laboratory research into all aspects of the behaviour and physiology of all marine and freshwater animals within the contexts of ecology, evolution and conservation. As the living resources of the world’s oceans, rivers and lakes are attracting increasing attention as food sources for humans and for their role in global ecology, the journal will also publish the results of research in the areas of fisheries biology and technology where the behaviour and physiology described have clear links to the contexts mentioned above. The journal will accept for publication Research Articles, Reviews, Rapid Communications and Technical Notes (see Instructions for authors for details). In addition, Editorials, Opinions and Book Reviews (invited and suggested) will also occasionally be published. Suggestions to the Editor-In-Chief for Special Issues are encouraged and will be considered on an ad hoc basis. With the goal of supporting early career researchers, the journal particularly invites submissions from graduate students and post-doctoral researchers. In addition to recognising the time constraints and logistical limitations their research often faces, and their particular need for a prompt review process, accepted articles by such researchers will be given prominence within the journal (see Instructions for authors for details).