Results 21 to 30 of about 399 (159)
Biota Colombiana, 2006 Los dipnoos suramericanos están representados por la familia Lepidosirenidae con una única especie, Lepidosiren paradoxa (Nelson 1994). Estos peces son emparentados con la familia Protopteridae, peces pulmonados africanos, que pertenecen al mismo orden ...
Juan David Bogotá-Gregory +1 more
doaj +8 more sources
Brazilian Journal of Veterinary Pathology, 2020 The present study reports a case of leucism in South American Lungfish Lepidosiren paradoxa captured in Corrientes, Argentina. It was observed a change in cutaneous pigmentation, and it was concluded that it was leucism and not albinism, since there was ...
Luis A. Romano, Virgínia F. Pedrosa
doaj +1 more source
Phylogeny and evolutionary history of the amniote egg
Journal of Morphology, Volume 282, Issue 7, Page 1080-1122, July 2021., 2021 We review morphological features of the amniote egg and embryos in a large comparative phylogenetic framework, including all major clades of extant vertebrates. We discuss 40 characters that are relevant for an analysis of the evolutionary history of the vertebrate egg. Special attention is given to the morphology of the cellular yolk sac, the eggshell,
J. Matthias Starck +2 more
wiley +1 more source
Fish and Fisheries, Volume 22, Issue 2, Page 324-355, March 2021., 2021 Abstract Hyperoxia occurs when water oxygen (O2) levels exceed normal atmospheric pressure (i.e., >100% air saturation). Fish can experience hyperoxia in shallow environments due to photosynthesis or in aquaculture through O2 supplementation. This review provides a comprehensive synthesis of the effects of hyperoxia on fish, spanning influences on ...
Tristan J. McArley +2 more
wiley +1 more source
Heterogeneidade de hemoglobina nos peixes da Amazonia [PDF]
Acta Amazonica, 1978 Resumo Os padrões eletroforáticos de hemoglobinas de peixes da Amazônia foram descritos. Os peixes incluíram a pirambóia sul-americana, Lepidosiren paradoxa, quatro espécies de raias de água doce do género Potamotrygon e teleósteos sctinopterígeos de 77 ...
Unni E. H. Fyhn +5 more
doaj +1 more source
Genetic and functional diversity of the multiple lungfish myoglobins
The FEBS Journal, Volume 287, Issue 8, Page 1598-1611, April 2020., 2020 The lungfish harbors multiple copies of the oxygen‐binding protein myoglobin (Mb). Amplification of this gene occurred during an early stage of lungfish evolution. The Mbs are differentially expressed throughout various tissues and display different abilities to bind oxygen or act as enzymes. Remarkably, the main expression site of the Mbs is the brain
Julia Lüdemann +6 more
wiley +1 more source
Ocorrência de hemoglobinas de efeito Root em peixes amazônicos [PDF]
Acta Amazonica, 1978 Resumo O efeito Root foi medido em hemolisados de representantes de 56 gêneros de peixes amazônicos. Hemolisados de várias espécies de peixes de respiração aérea apresentaram efeito Root, contrariamente às hipóteses publicadas.
Martha Farmer +3 more
doaj +1 more source
Transição da respiração aquática para a aérea: efeitos do CO2 sobre a função de hemoglobina [PDF]
Acta Amazonica, 1978 Resumo A dependência do pH do efeito específico ao CO2 (pCO2 = 30 torr) sobre os equilíbrios de oxigênio foi medida nas hemoglobinas de quatro espécies de peixe e um anfíbio: Leiostomus xanthurus (teleósteo marinho), Brachyplatystoma sp.
Martha Farmer
doaj +1 more source
Nuclear DNA content of thirty species of Neotropical fishes
Genetics and Molecular Biology, 1998 The present paper reports nuclear DNA content in 30 Neotropical freshwater fish species and summarizes the data on other Neotropical species presented in the literature. Among Neotropical fishes, the nuclear DNA content ranges from 1.04 ± 0.09 pg/nucleus
Margarida Lima Carvalho +2 more
doaj +1 more source
RNA‐Mediated Gene Duplication and Retroposons: Retrogenes, LINEs, SINEs, and Sequence Specificity
International Journal of Evolutionary Biology, Volume 2013, Issue 1, 2013., 2013 A substantial number of “retrogenes” that are derived from the mRNA of various intron‐containing genes have been reported. A class of mammalian retroposons, long interspersed element‐1 (LINE1, L1), has been shown to be involved in the reverse transcription of retrogenes (or processed pseudogenes) and non‐autonomous short interspersed elements (SINEs ...
Kazuhiko Ohshima, Frédéric Brunet
wiley +1 more source