Settleable atmospheric particulate matter affects cardiorespiratory responses to hypoxia in Nile tilapia (Oreochromis niloticus)

被引:8
作者
De Angelis, C. F. [1 ]
Soares, M. P. [1 ]
Cardoso, I. L. [1 ]
Filogonio, R. [1 ]
Taylor, E. W. [2 ]
McKenzie, D. J. [3 ]
Souza, I. C. [1 ]
Wunderlin, D. A. [4 ]
Monferran, M., V [4 ]
Fernandes, M. N. [1 ]
Leite, C. A. C. [1 ]
机构
[1] Univ Fed Sao Carlos, Dept Physiol Sci Dept, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands, England
[3] Univ Montpellier, CNRS, IFREMER, IRD,MARBEC, F-34095 Montpellier, France
[4] Univ Nacl Cordoba, CONICET, Dept Quim Organ, ICYTAC Inst Ciencia & Tecnol Alimentos Cordoba, Bv Medina Allende S-N,Ciudad Univ, RA-5000 Cordoba, Argentina
来源
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY | 2022年 / 257卷
基金
巴西圣保罗研究基金会;
关键词
Atmospheric particulate matter; Iron; Industry; Metal/metalloid; Nanoparticle; Environmental risk; Physiological responses; HEAVY-METALS; ENVIRONMENTAL HYPOXIA; RAINBOW-TROUT; RESPIRATORY RESPONSES; SOURCE APPORTIONMENT; OXIDATIVE STRESS; MIXING ZONES; FISH; WATER; BIOACCUMULATION;
D O I
10.1016/j.cbpc.2022.109353
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Atmospheric particulate matter (APM) emitted by iron ore processing industries has a complex composition, including diverse metallic particles and nanoparticles. Settleable APM (SePM) causes air to water cross-contamination and has recently been demonstrated to have harmful sublethal impacts on fish, eliciting stress responses, affecting the immune system, and reducing blood oxygen-carrying capacity. These findings imply potential consequences for fish aerobic performance and energy allocation, particularly in their ability to tolerate respiratory challenges such as aquatic hypoxia. To assess that potential limitation, we analyzed metabolic, cardiorespiratory, and morphological alterations after exposing tilapia, Oreochromis niloticus, to an environmentally relevant concentration of SePM (96 h) and progressive hypoxia. The contamination initiated detectable gill damage, reducing respiratory efficiency, increasing ventilatory effort, and compromising fish capacity to deal with hypoxia. Even in normoxia, the resting respiratory frequency was elevated and limited respiratory adjustments during hypoxia. SePM increased O(2)crit from 26 to 34% of O-2 (1.84 to 2.76 mg O-2.L (-1)). Such ventilatory inefficacy implies higher ventilatory cost with relevant alterations in energy allocation. Progression in gill damage might be problematic and cause: infection, blood loss, ion imbalance, and limited cardiorespiratory performance. The contamination did not cause immediate lethality but may threaten fish populations due to limitations in physiological performance. This was the first investigation to evaluate the physiological responses of fish to hypoxia after SePM contamination. We suggest that the present level of environmental SePM deserves attention. The present results demonstrate the need for comprehensive studies on SePM effects in aquatic fauna.
引用
收藏
页数:9
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