scholarly journals Biological aspects of Hypostomus affinis (Siluriformes: Loricariidae) in Brazilian coastal rivers

2022 ◽  
Vol 34 ◽  
Author(s):  
Tiago Magalhães da Silva Freitas ◽  
Gilberto Nepomuceno Salvador
Keyword(s):  
River Basin ◽  
Condition Factor ◽  
Southeastern Brazil ◽  
Energetic Cost ◽  
Breeding Period ◽  
Reproductive Process ◽  
Rainfall Variation ◽  
Biological Aspects ◽  
Doce River ◽  
Paraíba Do Sul River

Abstract Aim Determine the length-weight relationship (LWR), the period of reproduction, and evaluate the variation of the condition factor (K) of Hypostomus affinis from two coastal drainages in southeastern Brazil, assessing the influence of the rainfall on these biological aspects. Methods fish were sampled quarterly between April 2008 and April 2010 in tributaries of the Doce River basin (DRB) and the Paraíba do Sul River basin (PSRB). Specimens were caught using gillnets. LWR parameters were assessed by location and sex through a t-test. We used the frequency of mature specimens (FM) to evaluate the breeding period. Both FM and K values were assessed by a sinusoidal equation. Results A total of 492 specimens was captured, of which 128 were from the Doce River basin (DRB) and 364 from the Paraíba do Sul River basin (PSRB). In both areas, specimens showed a negative allometric growth type. We collected mature specimens along the studied period in both drainages, with the highest frequency observed at the beginning of the rainy season. We found a positive correlation between the rate of matures and the local rainfall variation. The condition factor (K) was lower for specimens from DRB and did not show a cyclic trend. On the other hand, we observed a cyclic chance of the K values for the individual from the PSRB, peaking in the transitional dry-rainy period. However, it was not possible to correlate it to the rainfall variation. Conclusions LWR parameters of H. affinis were consistent with data already available in the literature. The rainfall may influence the FM but not the K values. In this case, biological characteristics such as reproduction and (or) feeding may be jointly driving a discrete variation of K values. The reduction in K values in the rainy periods suggests a remarkable energetic cost for the reproductive process. In short, our results help us to understand the life cycle of a fish species within a highly modified environment, especially by dams.

Multivariate statistics for spatial and seasonal quality assessment of water in the Doce River basin, Southeastern Brazil

2021 ◽  
Vol 193 (3) ◽  
Author(s):  
Jéssica Bandeira de Melo Carvalho Passos ◽  
David Bruno de Sousa Teixeira ◽  
Jasmine Alves Campos ◽  
Rafael Petruceli Coelho Lima ◽  
Elpídio Inácio Fernandes-Filho ◽  
...  
Keyword(s):  
Quality Assessment ◽  
River Basin ◽  
Multivariate Statistics ◽  
Southeastern Brazil ◽  
Doce River

scholarly journals Induced CYP1A activity and DNA damage in fish from the middle Paraíba do Sul River basin, southeastern Brazil

2018 ◽  
Vol 40 (1) ◽  
pp. 36666 ◽  
Author(s):  
Claudio Nona Morado ◽  
Thiago Estevan Parente Martins ◽  
Francisco Gerson Araujo ◽  
Francisco José Roma Paumgarten ◽  
Iracema David Gomes
Keyword(s):  
Dna Damage ◽  
River Basin ◽  
Southeastern Brazil ◽  
Cyp1a Activity ◽  
Paraíba Do Sul River

Particulate heavy metal transport in the lower Paraíba do Sul River basin, southeastern, Brazil

2001 ◽  
Vol 15 (4) ◽  
pp. 587-593 ◽  
Author(s):  
M. S. M. B. Salomão ◽  
M. M. Molisani ◽  
A. R. C. Ovalle ◽  
C. E. Rezende ◽  
L. D. Lacerda ◽  
...  
Keyword(s):  
Heavy Metal ◽  
River Basin ◽  
Metal Transport ◽  
Southeastern Brazil ◽  
Heavy Metal Transport ◽  
Paraíba Do Sul River

scholarly journals AQUATIC MACROPHYTES DIVERSITY IN THE LOWER DOCE RIVER BASIN, ESPÍRITO SANTO, BRAZIL

2021 ◽  
Vol 25 (01) ◽  
pp. 117-132
Author(s):  
Álvaro Nepomuceno ◽  
◽  
Renara Nichio-Amaral ◽  
Victor Santos Miranda ◽  
Brenno Gardiman Sossai ◽  
...  
Keyword(s):  
River Basin ◽  
Aquatic Macrophytes ◽  
Southeastern Brazil ◽  
Floristic Survey ◽  
Espírito Santo ◽  
Lotic Environments ◽  
Espirito Santo ◽  
Nmds Analysis ◽  
Doce River ◽  
New Occurrences

Macrophytes are plant organisms that live partially or totally submerged in water, being fixed and free. The Doce River is one of the main rivers in southeastern Brazil and, in 2015, it was hit by ore tailings from the Fundão dam burst in Mariana, Minas Gerais. This work aims to provide a floristic survey of macrophytes in the lower Doce River basin and to compare the species composition between lentic and lotic environments. Expeditions were carried out monthly from October 2018 to September 2019, in five stations in lotic and six in lentic environments. A total of 105 species belonging to 33 families of vascular plants were recorded, among them 14 are new occurrences for Espírito Santo state. Richest families were Poaceae (23 spp.) and Cyperaceae (22 spp.). Amphibious/emerging plants were the most representative (46 spp.). NMDS analysis revealed that the composition of the lotic and lentic environments are different.

scholarly journals Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae) in the low Sorocaba river basin, São Paulo state, Brazil

2011 ◽  
Vol 71 (3) ◽  
pp. 763-770 ◽  
Author(s):  
GA. Villares Junior ◽  
LM. Gomiero ◽  
R. Goitein
Keyword(s):  
River Basin ◽  
Condition Factor ◽  
Feeding Activity ◽  
Gonadosomatic Index ◽  
Sao Paulo ◽  
Reproductive Period ◽  
Fish Diet ◽  
São Paulo ◽  
Summer Period ◽  
Biological Aspects

Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females.

scholarly journals Performance of water usage charge in the Nation’s domain as a water resource management tool in the São Francisco River basin

RBRH ◽  
2017 ◽  
Vol 22 (0) ◽  
Author(s):  
Leonardo Henrique Andrade Vera ◽  
◽  
Suzana Maria Gico de Lima Montenegro ◽  
Simone Rosa da Silva ◽  
◽  
...  
Keyword(s):  
River Basin ◽  
Management Tool ◽  
Financial Resources ◽  
Organic Load ◽  
Water Usage ◽  
Sao Francisco River ◽  
São Francisco River ◽  
Load Discharge ◽  
Doce River ◽  
Paraíba Do Sul River

ABSTRACT The present work consists in a study on the performance of usage charge as a management tool in the São Francisco River Basin in the period between 2010 and 2013, according to the objectives defined by the law 9.433/97. The objectives of this study considers: assessment of user participation in the amounts billed and type of use; comparative analysis of charged and collected amounts in the basin to observe user compliance to payments; analysis of the application of financial resources obtained from the revenue particularly the actions set forth by the basin investment plan, review of the evolution of uses: withdrawal, consumption, organic load discharge to assess the influence of usage charge on the rational use of water resources and comparison of pricing mechanisms of the Paraíba do Sul river, Piracicaba-Capivari-Jundiaí rivers, Doce river and São Francisco river basins for major uses. It is noted that the compliance by users to the usage charge is increasing gradually. Even though over 91% of the payments were on time by users in 2013, the financial resources obtained and the management to employ them do not meet the actual needs for investments in the basin conservation actions. With regards to the use of water withdrawal it is not observed the effect of the usage charge. For the uses of consumption and organic load discharge, the results were minor but positive. It is recommended a review of the reference flow and parameters of charging for water resources uses, and also it is suggested a study of the mechanisms of usage charge models implemented in the Paraíba do Sul river, Piracicaba-Capivari-Jundiaí river and Doce river basins, which uses the granted and measured flows for adjustments in the usage charge model, in the São Francisco river basin. All in all, the implementation of water usage charge in the São Francisco River basin despite it being recent, it is a process that will gradually be consolidating and contributing to environmental sustainability of the basin.

scholarly journals Meteorological and hydrological drought from 1987 to 2017 in Doce River Basin, Southeastern Brazil

RBRH ◽  
2020 ◽  
Vol 25 ◽  
Author(s):  
Elaisa Teixeira de Jesus ◽  
Jhones da Silva Amorim ◽  
Rubens Junqueira ◽  
Marcelo Ribeiro Viola ◽  
Carlos Rogério de Mello
Keyword(s):  
River Basin ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Rain Gauge ◽  
Hydrological Drought ◽  
Southeastern Brazil ◽  
Economic Sectors ◽  
Historical Series ◽  
The Standardized Precipitation Index ◽  
Doce River

ABSTRACT Meteorological drought is a natural hazard characterized as below-average precipitation from expected or normal that can affect various economic sectors, and lead to period with inadequate streamflow for established uses of the water (hydrological drought). We aimed to apply the Standardized Precipitation Index (SPI) and Standardized Streamflow Index (SSI) to identify the occurrence and the intensity of droughts in Doce River Basin (DRB), Southeastern Brazil. For this purpose, 71 rain gauge stations and one streamflow station were selected with 30-year monthly historical series (1987 to 2017). The SPI and SSI were calculated for the hydrological year (October-September) and the seasons (Spring, Summer, Fall, and Winter). SPI mapping was performed by geostatistical procedures. Pearson's coefficient was calculated to analyze the influence of meteorological on hydrological drought. The main meteorological drought events, observed in the hydrological years of 1994/95, 2000/01, and a recent and consecutive period of four hydrological years (2013-2017), were mainly influenced by events in spring and summer and, to a lesser extent, in fall. It was observed the influence of the meteorological drought on the hydrological drought on an annual and seasonal scale, except winter, where low precipitation does not influence in the streamflow.

scholarly journals Astyanax intermedius Eigenmann, 1908 (Actinopterygii: Characiformes: Characidae): Distribution extension in eastern Brazil

Check List ◽  
2011 ◽  
Vol 7 (5) ◽  
pp. 583 ◽  
Author(s):  
Antônio Queiroz Lezama ◽  
Mauro Luís Triques ◽  
Federico Miranda de Queiroz
Keyword(s):  
River Basin ◽  
Rio De Janeiro ◽  
Minas Gerais ◽  
Eastern Brazil ◽  
Minas Gerais State ◽  
Coastal Rivers ◽  
Doce River ◽  
Janeiro State ◽  
Paraíba Do Sul River

Astyanax intermedius is known to occur at Paraíba do Sul River basin and coastal rivers of Rio de Janeiro state. A detailed study is presented in order to clearly assign the species to the Doce River basin, in Minas Gerais state. 

Occurrence of Pseudocorynopoma heterandria Eigenmann, 1914 (Characidae) in Paraíba do Sul River Basin (Southeastern Brazil)

2014 ◽  
Vol 31 (2) ◽  
pp. 390-392
Author(s):  
F. L. K. Salgado ◽  
B. F. Terra ◽  
G. S. Camilo ◽  
E. O. da Silva ◽  
F. G. Araújo
Keyword(s):  
River Basin ◽  
Southeastern Brazil ◽  
Paraíba Do Sul River

Citizenship participation in water management plans in the Doce River Basin, Brazil and Catalonia, Spain

Water Policy ◽  
2013 ◽  
Vol 16 (2) ◽  
pp. 205-221 ◽  
Author(s):  
Desirée C. Rabelo ◽  
Josep Espluga ◽  
Edmilson C. Teixeira ◽  
Quim Brugué
Keyword(s):  
River Basin ◽  
Water Usage ◽  
New Governance ◽  
Advantages And Disadvantages ◽  
Governance Model ◽  
Management Plans ◽  
Water Management Plans ◽  
Participation Mechanisms ◽  
Distinct Features ◽  
Doce River

Despite the growing literature and empirical research on citizenship participation in the elaboration of water resources plans (WRP), little attention has been paid to the Terms of Reference (ToR) for such plans. Such a technical contract sets the targets, stages and activities to be met as part of the development of the WRP. Thus, any analysis of the participation impacts and results must follow the previously agreed terms but the ToR development may not, in itself, be participative. Examined herein are the ToR for the WRP of the Doce River Basin (Brazil) and the Catalonia Fluvial District (Spain), with focus on (i) proposals for democratising debates and decisions and (ii) the very process of ToR development. Historical and institutional aspects of both regions were analysed, which comprised participation mechanisms established by the corresponding national policies and recommended by the relevant international bodies. Despite the distinct features of the two regions, they both share the challenge of implementing a new governance model involving various stakeholders with the common goal of defining the water usage rights in a sustainable way. A comparative analysis of the two approaches revealed different approaches to tackle this challenge and highlighted advantages and disadvantages of each model.

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