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Gama-Flores JL, Huidobro-Salas ME, Sarma SSS, Nandini S. Population responses and fatty acid profiles of Brachionus calyciflorus (Rotifera) in relation to different thermal regimes. J Therm Biol 2020; 94:102752. [PMID: 33292993 DOI: 10.1016/j.jtherbio.2020.102752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 09/18/2020] [Accepted: 10/05/2020] [Indexed: 10/23/2022]
Abstract
Diurnal temperature fluctuations affect ectothermic species more than endothermic taxa. We tested the effect of three fixed temperatures (20, 25 and 30 °C) and a 24 h variable (20-30 °C) on the population growth and fatty acid profiles of the common rotifer Brachionus calyciflorus. Depending on the temperature treatment, the peak population abundances of B. calyciflorus varied from 65 to 80 ind./ml, the lowest being on variable temperature range. The rate of population increase varied from 0.31 to 0.52 per day, highest being at 30 °C. There was a curvilinear relationship between the population density and the egg ratio (number of eggs/female) in all the tested temperature regimes. The egg ratio was higher (>0.6) for treatments involving fixed temperatures, but for variable temperature regime, the egg ratios were lower (<0.5). Temperature also induced changes in the fatty acid content of B. calyciflorus. While the total saturated fatty acids increased, both mono-unsaturated and poly-unsaturated fatty acids decreased with increasing temperature regime. These results have been interpreted in relation to the role of temperature (both intensity and mode of exposure) on the population growth characteristics of rotifers.
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Affiliation(s)
- José Luis Gama-Flores
- Carrera de Biología, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, C.P. 54090, Los Reyes, Tlalnepantla, State of Mexico, Mexico
| | - María Elena Huidobro-Salas
- Carrera de Biología, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, C.P. 54090, Los Reyes, Tlalnepantla, State of Mexico, Mexico
| | - S S S Sarma
- Laboratory of Aquatic Zoology, Division of Research and Postgraduate Studies, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, C.P. 54090, Los Reyes, Tlalnepantla, State of Mexico, Mexico.
| | - S Nandini
- Laboratory of Aquatic Zoology, Division of Research and Postgraduate Studies, National Autonomous University of Mexico, Campus Iztacala Av. de Los Barrios No.1, C.P. 54090, Los Reyes, Tlalnepantla, State of Mexico, Mexico
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Li XD, Wang XY, Xu ME, Jiang Y, Yan T, Wang XC. Progress on the usage of the rotifer Brachionus plicatilis in marine ecotoxicology: A review. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2020; 229:105678. [PMID: 33197688 DOI: 10.1016/j.aquatox.2020.105678] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 09/29/2020] [Accepted: 11/03/2020] [Indexed: 06/11/2023]
Abstract
The rotifer, Brachionus plicatilis, is a widely used model species in marine ecotoxicology for evaluating pollutions, toxins, and harmful algae. In this paper, the marine ecotoxicology of Brachionus plicatilis was reviewed, including toxicity measurements of harmful algae species and environmental stresses. In addition, marine pollution involving pesticides, heavy metals, drugs, petroleum, and petrochemicals were addressed. Methods for measuring toxicity were also discussed. The standard acute lethal assay and the chronic population dynamics test were indicated as common methods of toxicity evaluating using B. plicatilis. Research on other biomarkers, such as behaviour, enzyme activity, or gene expression, are also reported here, with potential applications for fast detection or the scientific exploration of underlying molecular mechanisms. It is suggested that the methods selected should reflect the experimental purpose. Additionally, series assays should be conducted for comprehensive evaluation of ecotoxicity as well as to elucidate the correct mechanisms. Genetic methods, such as transcriptomics, were suggested as useful tools for exploring the toxicity mechanism using the rotifer B. plicatilis.
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Affiliation(s)
- Xiao-Dong Li
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China; Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China; Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China.
| | - Xin-Yi Wang
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, College of Animal Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China; Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Meng-En Xu
- Fujian Key Laboratory of Traditional Chinese Veterinary Medicine and Animal Health, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Yong Jiang
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China
| | - Tian Yan
- Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao, Shandong, 266071, China; Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong, 266071, China.
| | - Xiao-Cheng Wang
- National Marine Environmental Monitoring Centre, Dalian, Liaoning Province, 116023, China
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