osmoregulation
- Salt-water acclimation of the estuarine crocodile Crocodylus porosus involves enhanced ion transport properties of the urodaeum and rectum
Summary: The crocodile Crocodylus porosus responds to increased salinity by enhancing solute-coupled water absorption in the urodaeum; this response serves to conserve water and enables them to thrive in hyperosmotic environments.
- Hemodynamic responses to warming in euryhaline rainbow trout: implications of the osmo-respiratory compromise
Summary: Gastrointestinal blood flow of seawater-acclimated fish is fine-tuned to elevate water absorption and maintain osmotic balance during acute temperature increases.
- Comprehensive analysis of genes contributing to euryhalinity in the bull shark, Carcharhinus leucas; Na+-Cl− co-transporter is one of the key renal factors upregulated in acclimation to low-salinity environment
Summary: Na+-Cl− cotransporter expressed in the late distal tubule is one of the key renal factors that contributes to euryhalinity of the bull shark, Carcharhinus leucas.
- The mineralocorticoid receptor contributes to barrier function of a model fish gill epithelium
Summary: Cortisol relays its action via glucocorticoid and mineralocorticoid receptors (MRs) in fish tissues; mr knockdown in a cultured trout gill epithelium shows that MRs play a role in cortisol-mediated tightening of this tissue.
- Effects of temperature and salinity on body fluid dynamics and metabolism in the estuarine diamondback terrapin (Malaclemys terrapin)
Summary: Estuarine diamondback terrapins maintain osmotic balance under variable salinity conditions by using energetically efficient behavioral adjustments and water conservation strategies.
- Water and ion transport across the eversible vesicles in the collophore of the springtail Orchesella cincta
Summary: An inverse Ramsay assay and electrophysiology demonstrate that the eversible vesicles in the collophore of springtails absorb water and transport Na+, K+, Cl−, H+ and NH4+.
- Changes in free amino acid concentrations and associated gene expression profiles in the abdominal muscle of kuruma shrimp (Marsupenaeus japonicus) acclimated at different salinities
Summary: Kuruma shrimp, Marsupenaeus japonicus, change free amino acid concentrations and associated gene expression levels in their muscle to adjust effectively to different salinities.
- Reduced thermal tolerance during salinity acclimation in brook trout (Salvelinus fontinalis) can be rescued by prior treatment with cortisol
Summary: Brook trout experience a transient reduction in thermal tolerance during salinity acclimation, and improved osmoregulation after cortisol treatment corresponds with improved thermal tolerance.
- Functional classification of gill ionocytes and spatiotemporal changes in their distribution after transfer from seawater to freshwater in Japanese seabass
Summary: Gill ionocytes in Japanese seabass originate from undifferentiated cells in the filaments and expand their distribution to the lamellae during freshwater acclimation.
- Upper thermal limits of growth in brook trout and their relationship to stress physiology
Summary: Elevated temperature (>22°C) reduces growth rate and induces endocrine and cellular stress responses of brook trout. Daily temperature oscillation around a mean temperature of 21°C decreases growth and increases heat shock proteins.