The effect of cadmium on plasma melanocyte-stimulating hormone and morphological changes of melanophores in the cichlid fish Oreochromis niloticus, at different salinity levels

IF 0.9 4区生物学 Q3 MARINE & FRESHWATER BIOLOGY

Marine and Freshwater Behaviour and Physiology Pub Date : 2018-09-03 DOI:10.1080/10236244.2019.1568193

Dimas Wahyu Meidivanto, A. Soegianto, N. Jannah, Faridlotul Ma’rifah, S. Hariyanto, T. W. C. Putranto, B. Irawan

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引用次数: 3

Abstract

ABSTRACT The effects of cadmium concentration (0, 2.5 and 5 mg L−1) on melanocyte-stimulating hormone (MSH), melanophore index (MI), and melanophore number (MN), as well as a microscopic examination of scale melanocytes in tilapia (Oreochromis niloticus Linnaeus, 1757) was evaluated at different salinity levels (0, 5 and 15 ppt). The levels of MSH, MI, and MN were lower in Cd-exposed fish than in control fish (not exposed to Cd) at salinity level of 0 and 5 ppt. In ppt, however these levels of MSH, MI and MN in control and Cd-exposed fish were not significantly different. In the media without Cd, the levels of MSH, MI and MN were not significantly different at all salinities. The morphological changes of melanophores were higher in Cd-exposed fish than in control fish at salinity 0 and 5 ppt, respectively. These morphological changes were not significantly different in the control fish at all salinities as well as in fish exposed to 0–5 mg L−1 Cd at salinity of 15 ppt. This study therefore demonstrates that the toxic effect of Cd on MSH levels and melanophore morphology decreased with increasing salinity. Further, due to the sensitivity of chromatophores to Cd, melanophore morphology is proposed as a biomarker of Cd exposure in aquatic ecosystems.

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不同盐度下镉对尼罗鱼(Oreochromis niloticus)血浆促黑素细胞激素及黑色素细胞形态变化的影响

摘要研究了镉浓度(0、2.5和5 mg L−1)对罗非鱼(Oreochromis niloticus Linnaeus, 1757)体内黑色素细胞刺激激素(MSH)、黑色素细胞指数(MI)和黑色素细胞数量(MN)的影响，以及不同盐度水平(0、5和15 ppt)下鳞片黑色素细胞的显微镜检查。在0和5 ppt的盐度水平下，Cd暴露鱼的MSH、MI和MN水平低于对照鱼(未暴露于Cd)。在ppt中，对照组和cd暴露鱼的MSH、MI和MN水平无显著差异。在不含镉的培养基中，MSH、MI和MN在各盐度下均无显著差异。在盐度为0和5 ppt时，cd暴露鱼的黑素细胞形态变化高于对照鱼。这些形态变化在所有盐度下的对照鱼以及在盐度为15 ppt时暴露于0-5 mg L−1 Cd的鱼没有显著差异。因此，本研究表明，Cd对MSH水平和黑素细胞形态的毒性作用随着盐度的增加而降低。此外，由于色素团对Cd的敏感性，黑素团形态被认为是水生生态系统中Cd暴露的生物标志物。

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).