Results 21 to 30 of about 2,361 (207)

Genomics of Serrasalmidae teleosts through the lens of microbiome fingerprinting [PDF]

open access: yesMolecular Ecology, 2021
AbstractAssociations between host genotype and host‐associated microbiomes have been shown in a variety of animal clades, but studies on teleosts mostly show weak associations. Our study aimed to explore these relationships in four sympatric Serrasalmidae (i.e., piranha) teleosts from an Amazonian lake, using data sets from the hosts genomes (single ...
François-Étienne Sylvain   +4 more
openaire   +2 more sources

Genomic selection signatures in farmed Colossoma macropomum from tropical and subtropical regions in South America

open access: yesEvolutionary Applications, 2022
Tambaqui or cachama (Colossoma macropomum) is one of the most important neotropical freshwater fish used for aquaculture in South America, and its production is concentrated at low latitudes (close to the Equator, 0°), where the water temperature is warm.
John Fredy Gómez Agudelo   +10 more
doaj   +1 more source

Estimation of growth parameters of five fish species (Actinopterygii) caught in the central Amazon [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2018
For some tropical fishes, the information on growth parameters is still scarce, and few or no records are available in FishBase. Therefore, the objective of this study was to estimate the growth curves for Brycon amazonicus (Spix et Agassiz, 1829 ...
A. Guerreiro   +3 more
doaj   +3 more sources

Comparative cytogenetics of Serrasalmidae (Teleostei: Characiformes): The relationship between chromosomal evolution and molecular phylogenies. [PDF]

open access: yesPLoS One, 2021
Serrasalmidae has high morphological and chromosomal diversity. Based on molecular hypotheses, the family is currently divided into two subfamilies, Colossomatinae and Serrasalminae, with Serrasalminae composed of two tribes: Myleini (comprising most of pacus species) and Serrasalmini (represented byMetynnis,Catoprion, and remaining piranha’s genera ...
Favarato RM   +6 more
europepmc   +6 more sources

Behavior of Rio Sao Francisco Piranhas in Response to Changes in Space and Density. [PDF]

open access: yesZoo Biol
ABSTRACT Previous observations of Rio Sao Francisco piranhas (Pygocentrus piraya) at Cleveland Metroparks Zoo revealed frequent aggressive interactions, which were associated with the injury and death of some individuals. Fishes are known to increase aggressive behavior when available space is limited.
Oldfield RG   +4 more
europepmc   +2 more sources

Ergasilus yumaricussp. n. (COPEPODA: ERGASILIDAE) DAS BRÂNQUIAS DE Pygocentrus nattereri (KNER, 1860), Serrasalmus rhombeus (LINNAEUS, 1819) E Pristobrycon eigenmanni (NORMAN, 1929) (CHARACIFORMES : SERRASALMIDAE) DA AMAZÔNIA BRASILEIRA [PDF]

open access: yesActa Amazonica, 1995
Ergasilus yumaricussp. n. (Copepoda, Poecilostomatoida, Ergasilidae) é proposta. Os espécimens foram coletados dos filamentos branquiais de Pygocentrus nattereri, Serrasalmus rhombeuse Pristobrycon eigenmannido Rio Guaporé próximo à Pimenteiras, rios ...
José Celso O. MALTA, Angela Μ. VARELLA
doaj   +1 more source

Neotropical Monogenoidea. 44. Mymarothecium viatorum sp. n. (Ancyrocephalinae) from the gills of Piaractus brachypomus (Serrasalmidae, Teleostei) captured in a warm-water canal of a power plant in Szczecin, Poland [PDF]

open access: yesActa Ichthyologica et Piscatoria, 2002
Mymarothecium viatorum sp. n. (Dactylogyridae, Ancyrocephalinae) is described from the gills of Piaractus brachypomus (Teleostei, Serrasalmidae) captured in the warm water canal of a power plant of the city of Szczecin, Poland.
W.A. Boeger, W. Piasecki, E. Sobecka
doaj   +3 more sources

Renal myxoboliosis of Metynnis hypsauchen in the Brazilian Amazon: morphological and histopathological aspects

open access: yesActa Scientiarum: Biological Sciences, 2020
In their natural habitat, fish are constantly threatened by icthyoparasites, notably those from the Phylum Cnidaria, Hatschek, 1888, represented by species of the Myxozoa, responsible for infections in fish that cause complications to their health that ...
Jhonata Eduard Farias de Oliveira   +6 more
doaj   +1 more source

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling. [PDF]

open access: yesMol Ecol
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Timana-Mendoza C   +7 more
europepmc   +2 more sources

Ocorrência de dois citotipos em Serrasalmus spilopleura Kner, 1858 (characiformes, serrasalmidae) da região de confluência dos Rios Negro e Solimões, Amazonas, Brasil [PDF]

open access: yesActa Amazonica, 2000
Descreve-se pela primeira vez o cariótipo de exemplares de S. spilopleura da Amazônia Central. Todos os indivíduos analisados apresentaram número diplóide igual a 60 cromossomos, em conformidade com os dados da espécie obtidos em indivíduos da bacia do ...
Celeste Mutuko NAKAYAMA   +2 more
doaj   +1 more source

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