Arterio-venous anastomoses in rainbow trout gill filaments

Vogel, W; Vogel, V.; Pfautsch, M.

doi:10.1007/bf00219149

Cited by 56 publications

(19 citation statements)

References 8 publications

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“…The haemodynamic model of Vogel et al (1973Vogel et al ( , 1976, confirmed by Girard & Payan (1976), is entirely consistent with the relative delay (T50)…”

Section: Resultssupporting

confidence: 64%

“…The hypothesis of Steen & Kruysse (1964) suggested that, in the eel, a by-pass shunts part of blood flowing from the heart away from the lamellar exchange system. A detailed morphological analysis in two other species: Tilapia mossambica and Salmo gairdneri suggests an alternative model of circulation (Morgan & Tovell, 1973;Dunel & Laurent, 1973;Vogel, Vogel & Kremers, 1973;Vogel, Vogel & Schlote 1974;Vogel, Vogel & Pfautsch, 1976;Dunel, 1975;Girard & Payan, 1976; E. G. Gannon & D. J. Randall, personnel communication).…”

Section: Introductionmentioning

confidence: 99%

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Kinetic analysis and partitioning of sodium and chloride influxes across the gills of sea water adapted trout.

Girard¹,

Payan²

1977

The Journal of Physiology

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SUMMARY1. Sodium and chloride influxes across the gills of sea water adapted trout were studied with the perfused isolated head technique.2. The haemodynamic scheme describing anastomoses between efferent gill arteries and the filamentous sinus was confirmed and utilized to determine partitioning of sodium and chloride influxes.3. Two routes of sodium and chloride entry were demonstrated, one lamellar and the other sinusal. The lamellar sodium and chloride fluxes are respectively 133 ± 21*8 and 271 + 43-7 ptequiv/hr. 100 g. The sinus sodium and chloride fluxes are: 50 + 18X3 and 50 + 11-3 ,uequiv/hr. 100 g.4. The relative permeabilities of the apical and basal barriers of the lamellar epithelium were determined with influx experiments coupled to radioactive unloading experiments. The basal membrane is 30 times less permeable than the apical to sodium, while this ratio is 45 for chloride. Thus, the basal membrane represents the limiting factor in salt movement across the bronchial epithelium.5. The intracellular pools of the lamellar compartment were calculated for sodium: 1 1+0 17,uequiv/t00g of fish weight; and for chloride:541 + 0-83 gequiv/100 g of fish weight.

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“…The haemodynamic model of Vogel et al (1973Vogel et al ( , 1976, confirmed by Girard & Payan (1976), is entirely consistent with the relative delay (T50)…”

Section: Resultssupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Kinetic analysis and partitioning of sodium and chloride influxes across the gills of sea water adapted trout.

Girard¹,

Payan²

1977

The Journal of Physiology

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“…Results from the present experiment suggest that such microridge functions may be more probable than their function as respiratory surfaces in 0. mossambicus. The presence of intricate microridge patterns on the secondary lamellar surfaces of rainbow trout (Hughes 1979, Kendall & Dale 1979, Olson & Fromm 1973, Vogel et al 1976 indicates that they may well have a respiratory function in this species. Fishelson (1980) noted that freshwater tilapia have fewer epithelial microridges on their gill filaments than saltwater-adapted specimens and suggested that microridge formation was a re-sult of epithelial cell shrinkage in euryhaline species in order to expose the underlying orifices of chloride cells.…”

Section: Discussionmentioning

confidence: 98%

Changes in gill morphology of Oreochromis mossambicus subjected to heat stress

Hocutt

Tilney

1985

Environ Biol Fish

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SynopsisThe cichlid fish, Oreochromis mossambicus, was acclimated to 25" C for a 14 day period and then subjected to elevated temperatures of 30,35,40 and 45" C. Gill epithelia was progressively damaged from 30-40" C; gills from fish tested at 45" C showed less damage than those tested at 40" C. This is presumably due to the shorter exposure (survival) time at 45" C. Shrinkage of the secondary lamellae and the collapse of pillar cells supports the hypothesis that hypoxia at elevated temperatures is partially a function of changes in gill morphology.

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“…The only factors one could imagine are the perfusion flow-rate and/or the unstirred layers of water on the internal and external sides of the lamellar epithelium. In the framework of cardiac flow-rate and utilizing the hemodynamic model of Vogel, Vogel and Kremers (1973) and Vogel, Vogel and Pfautsch (1976), confirmed by Girard and Payan (1976), the totality of blood leaving the heart crosses the secondary gill lamellae. Since the perfusion flow-rate was 3 ml.…”

Section: Validity Of the Techniquementioning

confidence: 99%

Kinetic study of gill epithelium permeability to water diffusion in the fresh water trout,Salmo gairdneri: Effect of adrenaline

Isaia¹,

Girard²,

Payan³

1978

J. Membrain Biol.

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Summary. Using isolated head perfnsed at constant flow rates, close to those occurring in vivo, the movement of tritiated water through the gill epithelium of the trout, Salmo gairdneri was studied.The analysis of the curves of loading and unloading of tritiated water between the gill epithelium and the external and internal media shows two exponentials with different slopes in each medium. As the rapid exponentials have identical slopes, the external medium, the gill epithelium, and the perfusion medium constitute a system of three compartments in series for water exchanges. The kinetic analysis of rapid exponentials allowed us to calculate the characteristics of water movement through the apical and basal membrane and the size of the pool of water participating in the exchange mechanism.When the trout head is perfused without adrenaline, the permeability of the apical membrane to water is about 8 times higher than that of the basal membrane, the latter constituting the limiting factor for water diffusion.When ~the trout head is perfused with a perfusion medium containing 10-5M adrenaline this hormone produces a double action: it leads to a comparable increase in the permeability of both the apical and basal membranes and also increases the size of the water transport pool by a factor of four.

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Arterio-venous anastomoses in rainbow trout gill filaments

Cited by 56 publications

References 8 publications

Kinetic analysis and partitioning of sodium and chloride influxes across the gills of sea water adapted trout.

Kinetic analysis and partitioning of sodium and chloride influxes across the gills of sea water adapted trout.

Changes in gill morphology of Oreochromis mossambicus subjected to heat stress

Kinetic study of gill epithelium permeability to water diffusion in the fresh water trout,Salmo gairdneri: Effect of adrenaline

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