This work describes the length–weight relationship (LWR) of 37 fish species from Taquari River, one tributaries Jurumirim Reservoir in high Paranapanema Basin, São Paulo, Brazil. Information was not yet available FishBase on LWRs 22 and maximum weights (Wt) 24 species. New standard lengths are presented for nine as well two

Here the length–weight relationships (LWR, hereafter) of Pareiorhina pelicicei, Trichomycterus candidus, T. pirabitira, and piratymbara are provided. Samples each species were collected between April July 2017 with a hand net (1.5 mm mesh) in three sites from upper Paraná River basin, Southeastern Brazil. These results increase knowledge about LWR Neotropical freshwater fish.

The global prevalence of pumped-storage hydropower (PSH) is expected to grow exponentially as countries transition renewable energy sources. Compared conventional hydropower, little currently known regarding PSH impacts on aquatic biota. This study estimated the survival five life stages (egg, two larval stages, juvenile and adult) redfin (European) perch (Perca fluviatilis) following passage through a facility during pumping phase. was achieved by simulating individual stressors occur...

Abstract This work was carried out in order to provide the length-weight relationship (LWR) and allometric condition factor (Ka), as well its correlation with limnological variables, for Prochilodus lineatus from middle Tietê River basin. Fish were collected using gill nets two rivers contrasting environmental conditions, totaling 46 specimens highly polluted River, 37 Peixe a relatively well-conserved tributary. Environmental measures obtained concomitantly fish capture. The results showed...

The knickzones are defined as locally steep riverbed segments, such a convex reach in concave-up longitudinal profile. They worldwide distributed and geologically well studied, but despite their distinctiveness particular kind of macrohabitat there is notorious lack ecological knowledge. In this context, research proposal aims to provide physical description, terms habitats, limnological characterization basaltic knickzone. Information based on case study carried out the Sapucaí-Mirim River,...

Pumped hydroelectric energy storage (PHES) projects are being considered worldwide to achieve renewable targets and stabilize baseload supply from intermittent sources. Unlike conventional systems that only pass water downstream, a feature of PHES schemes is they rely on bi-directional flow. In some cases, this flow can be across different waterbodies or catchments, posing risk inadvertently expanding the range aquatic biota such as fish. The happening depends likelihood survival...

ABSTRACT Knickzones are originated from basaltic outcroppings, present runs, riffles and pools highly influenced by flood pulses, which maintain their natural dynamic. However, the construction of hydroelectric power plants alters or eliminate dynamism this area can affect resident fauna that may be dependent on it. The aim study was to evaluate organization a knickzone’s ichthyofauna considering influence seasonality connectivity habitats. performed in knickzone located Sapucaí-Mirim River,...

Length–weight relationships (LWR) were estimated for seven fish species from the Napo River and its main tributaries, Arabela Curaray rivers, Amazon basin, Peru. A total of 652 specimens sampled between 2012 2014 using seines gillnets. This study reports new maximum length four LWR weight records three five species, respectively.

The length-weight relationships (LWRs) are described for 29 fish species in the region of Tucuruí Reservoir, located Tocantins/Araguaia Basin, northern Brazil. Fishes fourteen sites were sampled seasonally 10 years, from 2001 to 2010. Significant differences between sexes found two species, while 27 had similar LWRs males and females. relationship standard length total is presented all as well minimum average size reproductive females seasonality occurrence. No information on these was...

Abstract: The length-weight relationship (LWR) and diet of a small trichomycterid catfish, Cambeva guareiensis, was studied based on 58 specimens captured in Corrente stream, Guareí River basin, São Paulo, Brazil. LWR analyses showed values ranged from 0.0097 to 0.0149 b 2.858 3.250. analysis the that high amounts aquatic insects (93.75% total items) were consumed by species. In addition, we found no statistically significant differences when comparing between dry rainy periods. Our study...

Context Small hydroelectric power plants (SHPs) are worldwide-distributed infrastructures, the ecological impacts of which still poorly known. Aim To evaluate role littoral macrophytes as nursery areas for fishes in a cascade three SHP reservoirs south-eastern Brazil. Methods Three random macrophyte banks, from intermediate and lentic compartments each reservoir, were sampled (with manual sieves gillnets) monthly along peak reproductive period. Basic limnological variables simultaneously...

Strategies for flood control associated to extreme precipitation events in urban areas are urgent, order prevent not only material damages but also avoid human losses. The construction of contention reservoirs ("piscinões") has become a common engineering intervention and peri-urban areas. However, there is lack studies focused on the evaluation environmental impacts this type construction. This study intended verify ecological effects retention reservoir built directly course Cascata...

Knickzones are large rock outcrops found in upstream and middle plateau river basins. This kind of geological formation, which is considered a macrohabitat, creates complex mesohabitats: pools, riffles runs, with distinct characteristics. In the present work, aim was to evaluate influence connectivity seasonality on trophic structure ichthyofauna knickzone pools. Fish were sampled four connected three isolated during dry rainy seasons, stomach contents 20 species analyzed. Seasonal...

Abstract: Aim This study verified if the macrophyte banks found in two reservoirs of small hydroelectric plants (SHPs) have a functional ecological role for initial development ichthyofauna. Additionally, we compared differences structure fish assemblages along each reservoir compartment and between reservoirs. Methods Sampling was performed March 2018, lotic, intermediate, lentic compartments Palmeiras Retiro reservoirs, Sapucaí-Mirim River (SP). Three distinct stretch (triplicates),...

Here the length–weight relationships (LWRs) of two catfish species are provided. Individuals Imparfinis mirini Haseman, 1911, and Phenacorhamdia tenebrosa (Schubart, 1964) were collected in August December 2017 from Guareí River Basin, upper Paraná basin, Brazil. Values b between 2.66 3.11 a 0.0122 0.0137; statistical analysis showed high r2 values. Lastly, new record maximum standard length for P. is

The length-weight relationships (LWRs) of five fish species are reported. fishes were sampled between September and December 2016 with seine net (4 mm mesh size) in 15 headwater streams from the upper Paraná River basin, Southeastern Brazil.

The study of the weight-length relationship a fish species can be used to address several aspects that involve distinction small taxonomic units, providing basic information for biology, in addition, this also as quantitative indicator degree health or well-being environment. objective was present unpublished data on (LWRs) two fish. were sampled months January and July 2017 2018 rivers belonging Upper Paraná Paraguay basin along MS-163, collected through sieves trawls. 49 individuals...

The weight-length relationship is an important tool in the studies of fish biology, physiology and ecology, as this useful for determining weight biomass, indicating conditions allowing comparisons between growth different populations, addition, can also be used to assess degree health species environment. objective study was present unpublished data on (LWRs) Hypostomus ancistroides Corydoras flaveolus. were sampled months January June 2013 rivers Ipanema National Forest, sub-basin River,...