Results 21 to 30 of about 241 (137)

Transferability of heterologous primers in Brycon falcatus [PDF]

open access: yesActa Amazonica, 2020
The genusBryconcomprises fish species of significant socioeconomic and biological importance in Brazil. Despite that, the genetic knowledge about these species is scarce, especially regardingBrycon falcatus.
Diego dos Santos PENHA   +9 more
doaj   +1 more source

DNA metabarcoding of mock communities highlights potential biases when assessing Neotropical fish diversity

open access: yesEnvironmental DNA, Volume 5, Issue 6, Page 1351-1361, November 2023., 2023
The performance of a taxonomy‐free approach using ASV/MOTUs was not as precise as assigning DNA reads to species using a curated 12S library that includes approximately 100 fish species since more than one ASV/MOTU was observed for the same specimen.
Heron Oliveira Hilário   +3 more
wiley   +1 more source

People need freshwater biodiversity

open access: yesWIREs Water, Volume 10, Issue 3, May/June 2023., 2023
Freshwater biodiversity (i.e., plants, animals, fungi, microbes, and other living things) provides a suite of critical ecosystem services to people. Collapses in freshwater biodiversity impact people, across all regions of the globe, rural–urban gradients, and the full socioeconomic spectrum, but perhaps most particularly indigenous and marginalized ...
Abigail J. Lynch   +21 more
wiley   +1 more source

A meta‐analytic review of monoterpene for fish anaesthesia

open access: yesFish and Fisheries, Volume 24, Issue 3, Page 367-380, May 2023., 2023
Abstract The use of anaesthetic agents has been increasing to address the welfare needs of different fish species in scientific and aquaculture practices. MS‐222 is the most used synthetic anaesthetic but some limitations and side effects have been reported.
Luís Félix   +3 more
wiley   +1 more source

Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity

open access: yesJournal of Fish Biology, Volume 99, Issue 4, Page 1158-1189, October 2021., 2021
ABSTRACT Freshwater fish communities in Ecuador exhibit some of the highest levels of diversity and endemism in the Neotropics. Unfortunately, aquatic ecosystems in the country are under serious threat and conditions are deteriorating. In 2018–19, the government of Ecuador sponsored a series of workshops to examine the conservation status of Ecuador's ...
Windsor E. Aguirre   +15 more
wiley   +1 more source

Atresia of ovarian follicles in fishes, and implications and uses in aquaculture and fisheries

open access: yesJournal of Fish Diseases, Volume 44, Issue 9, Page 1271-1291, September 2021., 2021
Abstract Atresia of ovarian follicles, that is the degenerative process of germ cells and their associated somatic cells, is a complex process involving apoptosis, autophagy and heterophagy. Follicular atresia is a normal component of fish oogenesis and it is observed throughout the ovarian cycle, although it is more frequent in regressing ovaries ...
Aldo Corriero   +3 more
wiley   +1 more source

eDNA in a bottleneck: Obstacles to fish metabarcoding studies in megadiverse freshwater systems

open access: yesEnvironmental DNA, Volume 3, Issue 4, Page 837-849, July 2021., 2021
In this study, we evaluated the taxonomic resolution capabilities of a short fragment from the 12S rRNA gene that is widely used in fish eDNA metabarcoding studies, and then compared eDNA metabarcoding data from water samples collected in the Amazon with traditional sampling using nets.
Jake M. Jackman   +8 more
wiley   +1 more source

Heavy metals accumulation and endocrine disruption in Prochilodus argenteus from a polluted neotropical river

open access: yesEcotoxicology and Environmental Safety, 2019
Heavy metals are considered major pollutants of aquatic environments due to the difficulty of metabolization and the bioaccumulative potential in tissues of aquatic organisms, especially fish muscle that is often used as food worldwide. In addition to causing cell damage, some metals such as aluminium (Al), cadmium (Cd), copper (Cu), and lead (Pb) can ...
A.L. Paschoalini   +4 more
openaire   +2 more sources

Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil

open access: yesNeotropical Ichthyology, 2021
Our study assessed the fishers’ perception (local ecological knowledge, LEK) concerning environmental impacts on fisheries and fish species in the final portion of Sub-Middle and Lower São Francisco.
Thiago D’avilla   +2 more
doaj   +1 more source

Transferability of heterologous microsatellite primers in Brycon gouldingi

open access: yesCiência Rural, 2018
: Brycon gouldingi is a species of neotropical fish of socioeconomic and environmental importance in the Tocantins-Araguaia Basin. Genetic studies on this species are still limited, making it difficult to evaluate the population structure and genetic ...
Felipe Pinheiro de Souza   +6 more
doaj   +1 more source

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