Article
Multidisciplinary Sciences
Debora C. Negrelli, Jose Iannacone, Vanessa D. Abdallah, Rodney K. De Azevedo
Summary: The study revealed distinct characteristics of parasite species and distribution in the Jacare-Pepira River in Sao Paulo, Brazil, showing high diversity and richness of parasites in P. maculatus and R. quelen.
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
(2021)
Article
Engineering, Chemical
Javier Izquierdo, Xabier Sukunza, Paula Espinazo, Jorge Vicente, Roberto Aguado, Martin Olazar
Summary: This study analyzed the influence of operating and geometric parameters on the fish hook effect in hydrocyclones, and the results showed that the prominence of the fish hook is significantly affected by these parameters.
Article
Environmental Sciences
Suresh Babu Padinhate Purayil, Shilta Madathampady M. Thomas, Anuraj Anirudhan, Jeena Nikarthil Sidhick, Asokan Pillaru Kandiyil, Sanal Ebeneezar, Boby Ignatius, Gopalakrishnan Achamveetil
Summary: Orange chromide, Pseudetroplus maculatus, is a euryhaline species with both ornamental and food value. It has wide salinity tolerance, repeated breeding, ease of maintenance, and better acceptance of food, making it an ideal model organism for studying physiological changes at different salinities.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Energy & Fuels
Yu-Liang Zhang, Yan-Juan Zhao
Summary: The transient characteristics of a pump as turbine are mainly influenced by the rotational acceleration effect, while the impact phenomena on flowrate and static pressure occur during atypical startup, closely related to the steady rotating speed and flowrate.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Environmental Sciences
Kai Peng, Bing Chen, Hongxia Zhao, Yuxi Wang, Wen Huang
Summary: A 63-day feeding trial with 640 juvenile L. maculatus was conducted to investigate the effects of dietary CT on various physiological parameters. Results showed that dietary CT up to 2 g/kg reduced serum lipid and glucose concentrations, enhanced liver antioxidant and immune response, and improved glucose utilization. However, it also induced liver injury, which raises concerns about its application in aquaculture.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Fisheries
Josiane Ribolli, Jurandir Joaquim Bernardes Junior, Evoy Zaniboni Zaniboni Filho, Renata Maria Guereschi, Alex Pires de Oliveira Nuner
Summary: This study examined the sex ratio of yellow-mandi Pimelodus maculatus in the Upper Uruguay River basin in southern Brazil and found a predominance of females. Females were larger and had a lifespan five years longer than males, which may be influenced by life history and environmental factors.
BOLETIM DO INSTITUTO DE PESCA
(2023)
Article
Energy & Fuels
Yang Ding, Jiangang Hao, Anqi Li, Xuhuai Wang, Xiang Zhang, Yong Liu
Summary: This study examines the characteristics and influencing factors of NOx emissions during the startup process of an F-class gas turbine generator set. Numerical simulation is conducted to calculate the annual NOx emissions for different seasons, and the impact of atmospheric environment changes on NOx emissions is thoroughly investigated. The findings of this study provide reference data for evaluating the pollution characteristics and combustion adjustment of gas turbines during startup.
Article
Environmental Sciences
Josef Knott, Melanie Mueller, Joachim Pander, Juergen Geist
Summary: Hydropower plants often use fish protection barriers to guide fish to alternative bypasses and prevent them from turbine passage. However, despite the existing bypasses and fine screens, a large number of fish still pass through the turbines. Therefore, improvements in bypass design and location are necessary to enhance their efficiency.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Parasitology
Elvis Silva Lima, Marcos Sidney Brito Oliveira, Marcos Tavares-Dias
Summary: This study investigated the influence of temporal and seasonal variations on the communities and infracommunities of metazoan parasites in a specific fish species from the Amazon River. The results showed differences in parasite distributions between years and seasonal periods, but overall effects were weaker than expected.
PARASITOLOGY RESEARCH
(2022)
Article
Energy & Fuels
Ye Zhou, Jianfeng Ma, Dengfeng Cao, Lielong Wu
Summary: The energy efficiency, cavitation performance, and operation stability are the major concerns in hydropower fields. This article introduces three conventional unit startup processes and proposes an optimized method. Through modeling, simulation, and testing, the validity of the model analysis is verified and the effectiveness of the startup control strategy is proven. This method can alleviate abnormal vibration and provide a basis for long-term stable operation of hydropower units.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Engineering, Mechanical
O. Savin, J. Baroth, C. Badina, S. Charbonnier, C. Berenguer
Summary: This study presents a strategy to estimate the extra cost due to start-up and shut-down of hydro turbines under high-cycle fatigue by comparing cumulated damages from different sequences. Rainflow cycle-counting and fatigue design curves are used in combination with a probabilistic approach and the Palmgren-Miner rule to estimate the damage ratio, allowing assessment of the extra costs of start and stop events. The approach is applied to Francis and Pelton runners, with different results discussed in terms of damage distributions and extra costs of start and stops.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Energy & Fuels
Taimoor Asim, Dharminder Singh, M. Salman Siddiqui, Don McGlinchey
Summary: Vertical axis wind turbines (VAWTs) are omni-directional, low-cost, low-efficiency wind power extractors, suitable for power generation in urban environments. However, minimal attention has been paid to their start-up dynamics. This study numerically investigates the start-up dynamics of a conventional drag-based VAWT and finds that an appropriately designed stator can significantly enhance its start-up characteristics.
Article
Food Science & Technology
Pedro Luiz Silva Sa Junior, Leandro Jose Silva, Humber Agrelli Andrade, Maria Ines Sucupira Maciel, Neide Kazue Sakugawa Shinohara, Maria Beatriz Abreu Gloria, Paulo Roberto Campagnoli Oliveira Filho
Summary: The study investigated the influence of washing cycles and corn starch inclusion on various characteristics of fish sausages. Results showed that washing cycles affected moisture content, fat levels, and color characteristics, while corn starch inclusion affected water holding capacity and nutrient content. Overall, the products met microbial standards and were well accepted by assessors. Optimized processing involved no washing cycles and 2% corn starch inclusion.
JOURNAL OF FOOD PROCESSING AND PRESERVATION
(2021)
Article
Engineering, Marine
Wei Wang, Xi Wang, Zhengwei Wang, Mabing Ni, Chunan Yang
Summary: This paper studied the internal flow characteristics of the pump turbine and the pressure pulsation of the runner under no-load conditions. It was found that the pressure pulsation characteristics of the runner are basically the same during the no-load process, with a high-speed ring and a stable channel vortex. The axial water thrust of the runner gap was much larger than the axial water thrust of the runner blades.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Energy & Fuels
Jonathan Fahlbeck, Hakan Nilsson, Saeed Salehi
Summary: Pumped Hydropower Storage (PHS) is a mature and economically viable technology for energy storage and grid regulation. The study focused on the initial design of a low-head model counter-rotating pump-turbine, revealing chaotic flow fields and severe flow separation as rotor speeds approached zero.
Article
Fisheries
Ruanny Casarim, Ivo Gaviao Prado, Raquel Coelho Loures, Paulo Santos Pompeu
MARINE AND FRESHWATER RESEARCH
(2018)
Article
Fisheries
Raquel Coelho Loures, Paulo Santos Pompeu
MARINE AND FRESHWATER RESEARCH
(2018)
Article
Fisheries
Joao de Magalhaes Lopes, Paulo Santos Pompeu, Carlos Bernardo Mascarenhas Alves, Alexandre Peressin, Ivo Gaviao Prado, Fabio Mineo Suzuki, Susanne Facchin, Evanguedes Kalapothakis
ECOLOGY OF FRESHWATER FISH
(2019)
Article
Ecology
Raquel Coelho Loures, Paulo Santos Pompeu
FRESHWATER BIOLOGY
(2019)
Article
Fisheries
Fernanda M. Andrade, Ivo G. Prado, Raquel C. Loures, Ludimilla P. Zambaldi, Paulo S. Pompeu
ACTA ICHTHYOLOGICA ET PISCATORIA
(2019)
Editorial Material
Environmental Sciences
Joao Pedro Correa Gomes, Gilberto Nepomuceno Salvador, Ruanny Casarim, Paulo Santos Pompeu, Marcelo Fulgencio Guedes Brito, Francisco Ricardo Andrade, Carlos Bernardo Mascarenhas Alves, Ivo Gaviao Prado, Tiago Casarim Pessali, Fabio Vieira
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2020)
Article
Fisheries
Carina Patez Porto, Ruanny Casarim, Ivo Gaviao Prado, Paulo Santos Pompeu
Summary: Despite the large number of dams in the major rivers of Brazil, there is limited knowledge about the vertical distribution of fish in neotropical reservoirs, particularly deep ones. This study focuses on understanding the vertical distribution of fish in the deepest reservoir in Brazil, located in the Jequitinhonha River. Quarterly sampling using an echosounder was conducted in three areas of the reservoir. The study reveals that while the deepest fish were found at 115 m, most fish were distributed at shallower depths, not exceeding 25 m. Diel vertical migration of fish was observed in some sampling areas and campaigns, suggesting that factors such as thermal variation play a role in fish distribution. These findings can be valuable for guiding environmental and fisheries managers, as well as ecologists, in improving sampling techniques and proposing management measures for similar deep reservoir ecosystems.
FISHERIES MANAGEMENT AND ECOLOGY
(2022)
Article
Ecology
Andressa Mendes Silva-Sene, Raquel Coelho Loures, Francisco Ricardo de Andrade Neto, Paulo Santos Pompeu
Summary: The study found that reservoir cascades have cumulative effects on fish assemblages, but these effects may be less pronounced when there are incoming free-flowing tributaries. The transitional areas between the rivers and the first reservoir were found to have the highest fish richness. Variables related to discharge and position along the gradient were identified as the main drivers of variation in fish assemblage structure.
ENVIRONMENTAL BIOLOGY OF FISHES
(2022)
Article
Zoology
Andressa M. Silva-Sene, Raquel C. L. Fontes, Ivo G. Prado, Paulo S. Pompeu
Summary: This study aimed to understand how migratory fishes use the longitudinal gradient, in an upstream to downstream direction of two free-flowing rivers and two reservoirs in a cascade within the Upper Grande River Basin, Brazil. The numeric abundance, biomass, richness, presence of fingerlings and juveniles, and the macroscopic gonadal maturation stage of migratory fishes were ascertained and evaluated bimonthly for two years. Results showed that recruitment in migratory fishes seems to rely completely on the free-flowing rivers upstream and their floodplains, and transition areas do not seem to have a significant role in recruitment. Therefore, the importance of maintaining the free flow of rivers and the integrity of their floodplains is highlighted.
Correction
Zoology
A. Peressin, J. M. Lopes, A. G. Bedore, C. B. M. Alves, I. G. Prado, P. S. Pompeu
NEOTROPICAL ICHTHYOLOGY
(2022)
Article
Zoology
Alexandre Peressin, Joao de Magalhaes Lopes, Alessandra Gomes Bedore, Carlos Bernardo Mascarenhas Alves, Ivo Gaviao Prado, Paulo Santos Pompeu
Summary: The study evaluated the effects of intracoelomic tagging on the survivorship, weight gain, and reproductive capacity of neotropical migratory fish. It found that mortality was higher in the true surgery group, with a tag expulsion rate of 20% and no difference in spawning between treatments. Future research should take into account losses due to death and tag expulsion when defining sample size.
NEOTROPICAL ICHTHYOLOGY
(2021)
Article
Limnology
Fernanda de Oliveira Silva, Francisco Ricardo de Andrade Neto, Samara Hermes Silva, Jade de Oliveira da Silva, Evoy Zaniboni Filho, Ivo Gaviao Prado, Alexandre Peressin, Fernando Mayer Pelicice
Article
Zoology
Alexandre Peressin, Ruanny Casarim, Ivo Gaviao Prado, Mauricio Cetra
NEOTROPICAL ICHTHYOLOGY
(2020)