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Haemogregarina daviesensis sp. nov. (Apicomplexa: Haemogregarinidae) from South American lungfish Lepidosiren paradoxa (Sarcopterygii: Lepidosirenidae) in the eastern Amazon region
(Springer, 2019-10-01)
Based on morphology and morphometry of gametocytes in blood and molecular phylogenetic analysis, we described a new species of hemoparasite from the genus Haemogregarina isolated from Lepidosiren paradoxa in the eastern ...
Blood gases and cardiovascular shunt in the South American lungfish (Lepidosiren paradoxa) during normoxia and hyperoxia
(ELSEVIER SCIENCE BV, 2010)
The South American lungfish (Lepidosiren paradoxa) has an arterial P(O2), (Pa(O2)) as high as 70-100 mm Hg, corresponding to Hb-O(2) saturations from 90% to 95%, which indicates a moderate cardiovascular right to left (R-L) ...
Aestivation in the South American lungfish, Lepidosiren paradoxa: Effects on cardiovascular function, blood gases, osmolality and leptin levels
(ELSEVIER SCIENCE BV, 2008)
The African (Protopterus sp.) and South American lungfish (Lepidosiren paradoxa) inhabit shallow waters, that seasonally dry out, which induces aestivation and cocoon formation in Protopterus. Differently, L. paradoxa has ...
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa
(Elsevier B.V., 2017-01-01)
The South American lungfish, Lepidosiren paradoxa inhabits seasonal environments in the Central Amazon and Parana-Paraguay basins that undergo significant oscillations in temperature throughout the year. They rely on ...
On the cardiac control in the South American lungfish, Lepidosiren paradoxa
(1989-12-01)
1. 1. The mechanisms behind cardiac control were investigated in the South American lungfish, Lepidosiren paradoxa, using fish with chronically implanted cannulae and electromagnetic flow probes. In addition, a preliminary ...
The South American lungfish Lepidosiren paradoxa as a new host for Trichodina quelenii
(Instituto Internacional de Ecologia, 2018)
AbstractRecently, the South American lungfish Lepidosiren paradoxa is being found inside aquaculture ponds, and even though there are a few studies on their parasite fauna, there is still much to be reported. Thus, the ...
Cardiorespiratory interactions previously identified as mammalian are present in the primitive lungfish
(2018-02-21)
The present study has revealed that the lungfish has both structural and functional features of its system for physiological control of heart rate, previously considered solely mammalian, that together generate variability ...
Effects of aerial hypoxia and temperature on pulmonary breathing pattern and gas exchange in the South American lungfish, Lepidosiren paradoxa
(Elsevier B.V., 2017-05-01)
The South American lungfish Lepidosiren paradoxa is an obligatory air-breathing fish possessing well-developed bilateral lungs, and undergoing seasonal changes in its habitat, including temperature changes. In the present ...
The first Triassic lungfish from South America (Santa Maria Formation, Paraná Basin) and its bearing on geological correlations within Pangaea
(2008-07-22)
The Triassic fish faunas of the Southern Hemisphere are only known from a few sedimentary basins and the most productive sites are those from the Karoo Supergroup, in South Africa and the Sydney Basin of Australia. A single ...
Respiratory chemoreceptor function in vertebrates - Comparative and evolutionary aspects
(2007-10-01)
The sensing of blood gas tensions and/or pH is an evolutionarily conserved, homeostatic mechanism, observable in almost all species studied from invertebrates to man. In vertebrates, a shift from the peripheral O2-oriented ...