Reduced impact of ocean acidification on growth and swimming performance of newly hatched tropical sharks (Chiloscyllium plagiosum)

IF 0.9 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Marine and Freshwater Behaviour and Physiology Pub Date : 2018-11-02 DOI:10.1080/10236244.2019.1590120

M. Pegado, Catarina P. Santos, A. Couto, Eduarda Pinto, A. Lopes, M. Diniz, R. Rosa

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引用次数: 8

Abstract

ABSTRACT Sharks have been facing unprecedented pressure over the last decades, and ocean acidification may represent an additional threat, particularly during their most susceptible life stages. Hence, the present study aimed to investigate the effects of ocean acidification (control pCO2 ~ 400 μatm; high pCO2 ~ 900 μatm) on the growth, swimming performance and cholinergic system of juvenile white-spotted bamboo sharks (Chiloscyllium plagiosum). After 45 days of exposure, we observed that high CO2 did not affect most of the end-points studied. However, somatic growth rate and the percentage of time that sharks spent swimming was significantly reduced under high CO2 conditions. Moreover, AChE activity decreased in two of the seven brain macroareas analyzed, the telencephalon and optic lobes. As this near-threatened shark species showed small sub-lethal effects to high CO2 levels, we argue that within a longer time-frame they can potentially reduce individual performance with cascading consequences to shark population dynamics.

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减少海洋酸化对新孵化的热带鲨鱼(Chiloscyllium plagiosum)生长和游泳性能的影响

在过去的几十年里，鲨鱼一直面临着前所未有的压力，海洋酸化可能是一个额外的威胁，特别是在它们最易受影响的生命阶段。因此，本研究旨在探讨海洋酸化的影响(控制pCO2 ~ 400 μatm;高pCO2 ~ 900 μatm)对白斑竹鲨幼鱼生长、游泳性能和胆碱能系统的影响。在暴露45天后，我们观察到高二氧化碳并没有影响研究的大多数终点。然而，在高二氧化碳条件下，鲨鱼的身体生长速度和游泳时间的百分比显著降低。此外，在分析的7个脑大区域中，端脑和视叶两个区域的AChE活性下降。由于这种濒临灭绝的鲨鱼物种对高二氧化碳水平表现出小的亚致死效应，我们认为，在更长的时间框架内，它们可能会降低个体表现，并对鲨鱼种群动态产生连锁反应。

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).