Results 21 to 30 of about 1,962 (194)
Assessing the population structure of Plagioscion squamosissimus (Teleostei, Perciformes, Sciaenidae) from the São Francisco River, Bahia, Brazil, using body morphology and otolith shape signatures. [PDF]
J Fish BiolAbstract The south American silver croaker, Plagioscion squamosissimus, holds significant importance for the artisanal fisheries in the sub‐middle and lower courses of the São Francisco River, located in northeastern Brazil. To investigate the population structure of this species along its longitudinal profile, a total of 150 individuals (50 fish per ...
Freitas FL +4 more
europepmc +2 more sources
DNA metabarcoding assessment of Neotropical ichthyoplankton communities is marker-dependent. [PDF]
Ecol Evol, 2023 DNA metabarcoding has been applied as a rapid, cost‐effective, and accurate taxonomy tool, allowing the identification of multiple individuals simultaneously. The combined use of the three markers increased the genera detection rates by 25%–87.5%, allowing an increased taxonomic coverage and robust taxonomic identification of complex Neotropical ...
Teixeira DF +3 more
europepmc +2 more sources
Multiple genetic lineages of anadromous migratory Mekong catfish Pangasius krempfi revealed by mtDNA control region and cytochrome b. [PDF]
Ecol Evol, 2023 We used the control region and cytochrome b to quantify the genetic diversity and to elucidate historical origins and migratory patterns of Pangasius krempfi. Fish were sampled along the Mekong tributaries and coastal areas in the Mekong Delta (Vietnam) and referenced to samples in Pakse (Laos). The results indicate moderate levels of genetic diversity,
Duong TY +4 more
europepmc +2 more sources
Machine learning models accurately predict clades of proteocephalidean tapeworms (Onchoproteocephalidea) based on host and biogeographical data. [PDF]
CladisticsAbstract Proteocephalids are a cosmopolitan and diverse group of tapeworms (Cestoda) that have colonized vertebrate hosts in freshwater and terrestrial environments. Despite the ubiquity of the group, key macroevolutionary processes that have driven the group's evolution have yet to be identified.
Vieira Alves P +7 more
europepmc +2 more sources
Distribution modelling for Neotropical freshwater stingrays Potamotrygon brachyura and Potamotrygon motoro (Myliobatiformes, Potamotrygonidae) in the Uruguay River basin. [PDF]
J Fish BiolAbstract This study aimed to identify geographical distribution patterns of the giant short‐tailed river stingray Potamotrygon brachyura and the motoro stingray Potamotrygon motoro in the Uruguay River basin. Data on presence/absence of stingrays were based on fishers' knowledge accessed by interviews through expeditions in Brazil, Argentina and ...
Pereira DAS, Reis RE, Fontoura NF.
europepmc +2 more sources
Acta Scientiarum: Animal Sciences, 2006 O objetivo deste estudo foi avaliar a sobrevivência e o crescimento de larvas de surubim, Pseudoplatystoma corruscans, em cinco densidades de cultivo: 15, 35, 55, 75 e 95 larvas/L, distribuídas em um delineamento inteiramente ao acaso com três repetições.
Rodrigo Campagnolo +1 more
doaj +1 more source
Journal of Limnology, 2023 The trophic discrimination factor (TDF) is a key parameter for stable isotope analysis and due to a lack of species-specific TDFs, mean universal values have been used, resulting in uncertainties about the trophic position of species and a call for more
Gislaine Iachstel Manetta +5 more
doaj +1 more source
Acta Scientiarum: Biological Sciences, 2006 Neste trabalho, foi avaliada a eficiência do eugenol como anestésico em juvenis de pintado (Pseudoplatystoma corruscans) através de ensaios. No primeiro, os peixes (n=6) foram individualmente expostos a concentrações de 25, 50, 75, 100 mg L-1 de eugenol ...
Luiz Vítor Oliveira Vidal +3 more
doaj +1 more source
River Damming Impacts on Fish Habitat and Associated Conservation Measures
Reviews of Geophysics, Volume 61, Issue 4, December 2023., 2023 Abstract River damming has brought great benefits to flood mitigation, energy and food production, and will continue to play a significant role in global energy supply, particularly in Asia, Africa, and South America. However, dams have extensively altered global river dynamics, including riverine connectivity, hydrological, thermal, sediment and ...
Qiuwen Chen +16 more
wiley +1 more source
Water Resources Research, Volume 59, Issue 7, July 2023., 2023 Abstract This study investigates how environmental flows (e‐flows) can be designed as dynamic operating policies to optimize long‐term economic and ecosystem performance in reservoir systems. The main goal is to provide e‐flow solutions that contribute to better preparedness and flexibility of hydro‐systems to face multiyear stress periods, reducing ...
Ana Paula Dalcin +3 more
wiley +1 more source