The Na + / K + / 2 Cl – cotransporter in the sea bass Dicentrarchus labrax during ontogeny : involvement in osmoregulation Catherine Lorin - Nebel
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چکیده
Introduction When exposed to salinity variations, teleosts adapt through osmoregulation, which results in the maintenance of their blood osmolality within a narrow range of ~280–350·mosmol·kg –1. Marine teleosts are subject to diffusive ion invasion and osmotic water loss. Their main osmoregulatory adaptations include the following. (1) In the digestive tract, high drinking rate of seawater (SW) followed by passive and active ion absorption, itself driving osmotic water intake that compensates dehydration; (2) in the excretory system, production of low volumes of isotonic urine; (3) in the gills,
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Adaptation of the sea-bass (Dicentrarchus labrax) to fresh water: role of aquaporins and Na+/K+-ATPases.
Sea-bass (Dicentrarchus labrax) grow under different salinity regimes, from the open sea to lagoons and even rivers, but some mortality has been recorded in juvenile stages when exposed to low salinity water. Changes in water permeability of different osmoregulatory tissues could be the cause of reduction in blood osmotic pressure and death in some fish in fresh water (FW). In order to explore ...
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