Fish injuries resulting from transient operating conditions in a Brazilian hydropower plant: morphological, physiological and biochemical evaluation in Pimelodus maculatus (Siluriformes: Pimelodidae)

IF 2 4区生物学 Q1 ZOOLOGY

Neotropical Ichthyology Pub Date : 2023-01-01 DOI:10.1590/1982-0224-2022-0104

Janaína dos Santos Pedron, Jurandir Joaquim Bernardes Junior, Josiane Ribolli, Jennyffer Souza, Aline Guimarães Pereira, Hugo Tolentino, Romuel Barros, Carine de Freitas Milarch, Rafael José Gonçalves Dias, Renata Maria Guereschi, Alexandra Latini, Alex Pires de Oliveira Nuñer

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引用次数: 0

Abstract

Abstract This study investigated injuries sustained by Pimelodus maculatus caused by transient operating conditions in a Brazilian hydroelectric power plant. Fish (n = 43) that inhabited the tailrace and appeared on the water surface after changes in the operating conditions were evaluated (IF). Additionally, fish (n = 10) captured using longline in the vicinity of the tailrace were used for comparisons (NF). Blood samples were evaluated for cortisol, glucose, and lactate concentrations. Tissue samples (gill, liver, brain, and muscle) were analyzed for oxidative stress biomarkers (TBARS, protein carbonyl content, and catalase activity) and histology (gill, liver, and spleen). The most prominent findings in IF were barotraumas with intra-abdominal hemorrhage and swim bladder rupture. Cortisol and glucose concentrations were lower for IF when compared to NF. IF also suffered from oxidative stress, as indicated by increased TBARS in the liver and brain, as well as increased protein carbonyl content in the gills and liver. The main histological alterations induced by the adverse conditions were circulatory disorders, such as telangiectasia and gill aneurysm, hepatic congested veins, and hemorrhage in the liver and spleen. The abrupt drop of pressure resulting from changes in the operating conditions of the turbines caused barotraumas and oxidative stress, which were the leading causes of fish mortality

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巴西水电站瞬态运行条件对鱼类的伤害:斑纹扁虱的形态、生理和生化评价(鼠尾草目:扁虱科)

摘要本研究调查了巴西某水电站瞬态运行条件下黄斑蛇对其造成的伤害。对运行条件改变后居住在尾流并出现在水面上的鱼(n = 43)进行了评价(IF)。此外，在尾道附近用延绳钓捕获的鱼(n = 10)用于比较(NF)。血液样本评估皮质醇、葡萄糖和乳酸浓度。分析组织样本(鳃、肝脏、大脑和肌肉)的氧化应激生物标志物(TBARS、蛋白质羰基含量和过氧化氢酶活性)和组织学(鳃、肝脏和脾脏)。最突出的表现是压力创伤伴腹腔出血和膀胱破裂。与NF相比，IF组的皮质醇和葡萄糖浓度较低。肝脏和大脑中TBARS的增加以及鳃和肝脏中蛋白质羰基含量的增加表明，IF也遭受氧化应激。不良条件引起的组织学改变主要为循环系统紊乱，如毛细血管扩张、鳃动脉瘤、肝静脉充血、肝脾出血等。涡轮机工作条件的变化导致的压力突然下降引起气压损伤和氧化应激，这是鱼类死亡的主要原因

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来源期刊

Neotropical Ichthyology 生物-动物学

CiteScore

2.80

自引率

17.60%

发文量

审稿时长

6-12 weeks

期刊介绍： Neotropical Ichthyology is the official journal of the Sociedade Brasileira de Ictiologia (SBI). It is an international peer-reviewed Open Access periodical that publishes original articles and reviews exclusively on Neotropical freshwater and marine fishes and constitutes an International Forum to disclose and discuss results of original research on the diversity of marine, estuarine and freshwater Neotropical fishes. -Frequency: Four issues per year published only online since 2020, using the ‘rolling pass’ system, which posts articles online immediately as soon as they are ready for publication. A searchable and citable Digital Object Identifier (DOI) is assigned to each article immediately after online publication, with no need to await the issue’s closing. -Areas of interest: Biology, Biochemistry and Physiology, Ecology, Ethology, Genetics and Molecular Biology, Systematics. -Peer review process: The Editor-in-Chief screens each manuscript submitted to Neotropical Ichthyology to verify whether it is within the journal’s scope and policy, presents original research and follows the journal’s guidelines. After passing through the initial screening, articles are assigned to a Section Editor, who then assigns an Associate Editor to start the single blind review process.