ArticleJournal of comparative physiology. B, Biochemical, systemic, and environmental physiology2008
Physiological response in the European flounder (Platichthys flesus) to variable salinity and oxygen conditions.
Article in Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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8 citing papers in PubMed, 38 citations in OpenAlex.
- Hypoxia attenuate ionic transport in the isolated gill epithelium of Carcinus maenas.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2020Article
- Involvement of the phosphoryl transfer network in gill bioenergetic imbalance of pacamã (Lophiosilurus alexandri) subjected to hypoxia: notable participation of creatine kinase.Fish physiology and biochemistry · 2020Article
- The Air-Breathing Paradise Fish (Frontiers in physiology · 2018Article
- Different Oxygen Stresses on the Responses of Branchial Morphology and Protein Expression in the Gills and Labyrinth Organ in the Aquatic Air-breathing Fish,Zoological studies · 2016Article
- Acclimation of brackish water pearl spot (Etroplus suratensis) to various salinities: relative changes in abundance of branchial Na(+)/K (+)-ATPase and Na (+)/K (+)/2Cl (-) co-transporter in relation to osmoregulatory parameters.Fish physiology and biochemistry · 2014Article
- Codon 104 variation of p53 gene provides adaptive apoptotic responses to extreme environments in mammals of the Tibet plateau.Proceedings of the National Academy of Sciences of the United States of America · 2013Article
- Osmoregulatory strategies in natural populations of the black-chinned tilapia Sarotherodon melanotheron exposed to extreme salinities in West African estuaries.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2012Article
- Effect of Ethanol on Branchial Adenosine Triphosphatases in Oreochromis mossambicus (Peters).Toxicology international · 2011Article
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Physiological mechanisms involved in acclimation to variable salinity and oxygen levels and their interaction were studied in European flounder. The fish were acclimated for 2 weeks to freshwater (1 per thousand salinity), brackish water (11 per thousand) or full strength seawater (35 per thousand) under normoxic conditions (water Po(2) = 158 mmHg) and then subjected to 48 h of continued normoxia or hypoxia at a level (Po(2) = 54 mmHg) close to but above the critical Po(2). Plasma osmolality, [Na(+)] and [Cl(-)] increased with increasing salinity, but the rises were limited, reflecting an effective extracellular osmoregulation. Muscle water content was the same at all three salinities, indicating complete cell volume regulation. Gill Na(+)/K(+)-ATPase activity did not change with salinity, but hypoxia caused a 25% decrease in branchial Na(+)/K(+)-ATPase activity at all three salinities. Furthermore, hypoxia induced a significant decrease in mRNA levels of the Na(+)/K(+)-ATPase alpha1-subunit, signifying a reduced expression of the transporter gene. The reduced ATPase activity did not influence extracellular ionic concentrations. Blood [Hb] was stable with salinity, and it was not increased by hypoxia. Instead, hypoxia decreased the erythrocytic nucleoside triphosphate content, a common mechanism for increasing blood O(2) affinity. It is concluded that moderate hypoxia induced an energy saving decrease in branchial Na(+)/K(+)-ATPase activity, which did not compromise extracellular osmoregulation.
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