Results 11 to 20 of about 924 (173)
von Willebrand factor D and EGF domains is an evolutionarily conserved and required feature of blastemas capable of multitissue appendage regeneration. [PDF]
Evol Dev, 2020 Identification of a gene, von Willebrand Factor D and EGF Repeats (vwde), whose expression is highly enriched in axolotl limb blastemas prompted comparative experimentation in lungfish, Polypterus, and Xenopus. Vwde expression is induced in key tissues during regeneration in all four models (fins in lungfish and polypterus; tail in Xenopus embryos ...
Leigh ND +11 more
europepmc +2 more sources
The conundrum of pharyngeal teeth origin: the role of germ layers, pouches, and gill slits. [PDF]
Biol Rev Camb Philos Soc, 2022 ABSTRACT There are several competing hypotheses on tooth origins, with discussions eventually settling in favour of an ‘outside‐in’ scenario, in which internal odontodes (teeth) derived from external odontodes (skin denticles) in jawless vertebrates. The evolution of oral teeth from skin denticles can be intuitively understood from their location at ...
Huysseune A, Cerny R, Witten PE.
europepmc +2 more sources
Using the swimbladder as a respiratory organ and/or a buoyancy structure—Benefits and consequences
Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 335, Issue 9-10, Page 831-842, November 1, 2021., 2021 Graphical abstract Abstract A swimbladder is a special organ present in several orders of Actinopterygians. As a gas‐filled cavity it contributes to a reduction in overall density, but on descend from the water surface its contribution as a buoyancy device is very limited because the swimbladder is compressed by increasing hydrostatic pressure.
Bernd Pelster
wiley +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
Equilíbrio e cinética de união de oxigênio e monóxido de carbono à hemoglobina do peixe pulmonado sul americano Lepidosiren paradoxa [PDF]
Acta Amazonica, 1978 Resumo A hemoglobina do peixe pulmonado sul americano Lepidosiren paradoxa só apresenta um componente. Os equilíbrios desta proteína respiratória foram investigados tanto no sangue como na hemoglobina purificada. Há um marcado efeito Bohr alcalino normal,
Charles Phelps +6 more
doaj +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
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
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