Results 21 to 30 of about 869 (167)

High trophic niche overlap between sympatric peacock basses (Cichliformes: Cichlidae: Cichla): Concordant findings from three dietary analysis methods. [PDF]

J Fish Biol
Abstract Dietary analysis has contributed to our understanding of animal niches, interspecific interactions, community structure and the flow of matter and energy in food webs. We employed three methods of dietary analysis to estimate trophic niche overlap between two peacock bass species, Cichla cataractae and Cichla ocellaris, across sympatric ...
Fry BL, Roberts HC, Winemiller KO.
europepmc   +2 more sources

Synapsis in supernumerary chromosomes of Prochilodus lineatus (Teleostei: Prochilodontidae) [PDF]

Caryologia, 1998
Summary Meiotic analysis performed on a sample of 10 specimens of Prochilodus lineatus revealed continuous filaments of different sizes stained by AgNO3, corresponding to the bivalent of the normal complement. Small supernumerary chromosomes were observed as isolated and well stained bodies, scattered among the other elements.
Fausto Foresti, Claudio Oliveira, Ana Dias   +2 more
exaly   +3 more sources

Ossification of the cranium of Inpaichthys kerri (Characiformes: Acestrorhamphidae) with discussion of paedomorphic traits in the genus. [PDF]

J Anat
In this study, we present a detailed description of the cranial development of Inpaichthys kerri (Characiformes: Acestrorhamphidae), highlighting important topics such as pedomorphic characters and their relationship with ontogeny and phylogeny, as well as ossification sequences unique to the species. Abstract The study of development provides valuable
Santos YS, Marinho MMF.
europepmc   +2 more sources

Biogeographic reconstruction of the migratory Neotropical fish family Prochilodontidae (Teleostei: Characiformes)

Zoologica Scripta, 2022
AbstractGeographically, widespread Neotropical fish lineages offer opportunities to reconstruct historical biogeography patterns and infer processes leading to modern ichthyological diversity and distribution. The characiform family Prochilodontidae is well suited for such reconstruction because their migrations limit population substructure within ...
Benjamin W. Frable, Bruno F. Melo, João P. Fontenelle, Claudio Oliveira, Brian L. Sidlauskas   +4 more
openaire   +4 more sources

Early Biogeography of Otophysi Points to the Neotropics as the Cradle of Characiphysan Fishes. [PDF]

Ecol Evol
Otophysan fishes represent 70% of living freshwater fishes with 12,000 species. Relationships among their four orders were explored through a dense taxonomic sampling including 529 complete mitochondrial genomes and 4 nuclear genes for 324 species.
Lenglin A, Hidalgo M, Miranda G, De la Sota A, Caminade P, Belkhir K, Otero O, Antoine PO, Garcia-Davila C, Hubert N.   +9 more
europepmc   +2 more sources

Genomic Insights Into Carnivorous Fish in the Characiformes. [PDF]

Ecol Evol
This study employed comparative genomic approaches using 12 high‐quality Characiformes genomes (covering nine subfamilies) with zebrafish as an outgroup to explore the molecular mechanisms underlying the carnivorous adaptation of Characiformes. Expanded gene families, positively selected genes, and rapidly evolving genes in carnivorous species were ...
Zhao S, Mei X, Zhang Z, Xia T, Zhou S, Dong Y, He S, Yao Z, Li Y, Yang X, Zhang H.   +10 more
europepmc   +2 more sources

Ontogeny of the Skeleton of Leporinus oliveirai (Characiformes, Anotomidae). [PDF]

J Morphol
In this study, we provide the first complete description of the skeleton ontogeny of an anostomid. The developmental sequence of 141 bony elements is described and illustrated. The main discoveries are numerous conical teeth on the premaxilla and dentary that are replaced with three or four large incisiform multicuspid teeth, that become unicuspid in ...
Boaretto MP, Venturieri M, Birindelli JLO.   +2 more
europepmc   +2 more sources

Eco-evolutionary factors that influence its demographic oscillations in Prochilodus costatus (Actinopterygii: Characiformes) populations evidenced through a genetic spatial-temporal evaluation. [PDF]

Evol Appl, 2023
Abstract The human activity impact on wild animal populations is indicated by eco‐evolutionary and demographic processes, along with their survival and capacity to evolve; consequently, such data can contribute toward enhancing genetic‐based conservation programs.
Ludwig S, Pimentel JDSM, Cardoso Resende L, Kalapothakis E.   +3 more
europepmc   +2 more sources

Assessment of total mercury content in fish muscle tissue from the middle basin of the Pastaza River, Ecuador. [PDF]

PLoS ONE
One of the most toxic metals is mercury, which exhibits high toxicity during short exposure periods. This study aimed to determine the concentration of total mercury (THg) in fish muscle tissue from various species captured from two locations in the ...
Fernanda Paz-Suconota, Lenys Fernández, Natalia Carpintero-Salvador, Melany Ruiz-Urigüen, Stefan Alexander Brück, Fidel Ernesto Rodríguez Galarza, Ricardo Burgos-Morán, Patricio J Espinoza-Montero   +7 more
doaj   +2 more sources

Repetitive sequences: the hidden diversity of heterochromatin in prochilodontid fish [PDF]

Comparative Cytogenetics, 2015
The structure and organization of repetitive elements in fish genomes are still relatively poorly understood, although most of these elements are believed to be located in heterochromatic regions.
Maria L. Terencio, Carlos Henrique Schneider, Maria Claudia Gross, Edson Junior do Carmo, Viviane Nogaroto, Mara Cristina de Almeida, Roberto Ferreira Artoni, Marcelo Ricardo Vicari, Eliana Feldberg   +8 more
doaj   +2 more sources