Chlorides/metabolism; Fundulidae/physiology; Models, Biological; Saline Solution, Hypertonic/metabolism; Water-Electrolyte Balance/physiology; Alkaloids; Animals; Benzophenanthridines; Blotting, Western; Cyclic AMP-Dependent Protein Kinases/antagonists & inhibitors; Electrophoresis, Polyacrylamide Gel; Electrophysiology; Epithelium/drug effects; Epithelium/metabolism; Focal Adhesion Protein-Tyrosine Kinases; Imidazoles/pharmacology; Immunohistochemistry; Ion Channels/antagonists & inhibitors; Isoquinolines/pharmacology; JNK Mitogen-Activated Protein Kinases/metabolism; MAP Kinase Kinase 4; Mitogen-Activated Protein Kinase Kinases/metabolism; Nova Scotia; Okadaic Acid/pharmacology; Phenanthridines/pharmacology; Protein Kinase C/antagonists & inhibitors; Protein Kinase C/metabolism; Protein Serine-Threonine Kinases/antagonists & inhibitors; Protein Serine-Threonine Kinases/metabolism; Protein-Tyrosine Kinases/metabolism; Pyridines/pharmacology; Saline Solution, Hypertonic/toxicity; Sulfonamides/pharmacology; Tamoxifen/pharmacology; Water-Electrolyte Balance/drug effects; p38 Mitogen-Activated Protein Kinases/antagonists & inhibitors; p38 Mitogen-Activated Protein Kinases/metabolism