Morphofunctional studies on branchial ionocytes with reference to fish osmoregulation
نویسندگان
چکیده
منابع مشابه
Urea based osmoregulation and endocrine control in elasmobranch fish with special reference to euryhalinity.
Since the landmark contributions of Homer Smith and co-workers in the 1930s there has been a considerable advance in our knowledge regarding the osmoregulatory strategy of elasmobranch fish. Smith recognised that urea was retained in the body fluids as part of the 'osmoregulatory ballast' of elasmobranch fish so that body fluid osmolality is raised to a level that is iso- or slightly hyper-osmo...
متن کاملOsmoregulation in elephant fish Callorhinchus milii (Holocephali), with special reference to the rectal gland.
Osmoregulatory mechanisms in holocephalan fishes are poorly understood except that these fish are known to conduct urea-based osmoregulation as in elasmobranchs. We, therefore, examined changes in plasma parameters of elephant fish Callorhinchus milii, after gradual transfer to concentrated (120%) or diluted (80%) seawater (SW). In control fish, plasma Na and urea concentrations were about 300 ...
متن کاملNew insights into gill ionocyte and ion transporter function in euryhaline and diadromous fish.
Teleost fishes are able to acclimatize to seawater by secreting excess NaCl by means of specialized "ionocytes" in the gill epithelium. Antibodies against Na(+)/K(+)-ATPase (NKA) have been used since 1996 as a marker for identifying branchial ionocytes. Immunohistochemistry of NKA by itself and in combination with Na(+)/K(+)/2Cl(-) cotransporter and CFTR Cl(-) channel provided convincing eviden...
متن کاملA Time Differential Staining Technique Coupled with Full Bilateral Gill Denervation to Study Ionocytes in Fish
Branchial ionocytes (ICs) are the functional units for ionic regulation in fish. In adults, they are found on the filamental and lamellar epithelia of the gill where they transport ions such as Na+, Cl- and Ca2+ via a variety of ion channels, pumps and exchangers. The teleost gill is extrinsically innervated by the facial (VI), glossopharyngeal (IX) and vagus (X) nerves. The IX and X nerves are...
متن کاملExpression Profiles of Branchial FXYD Proteins in the Brackish Medaka Oryzias dancena: A Potential Saltwater Fish Model for Studies of Osmoregulation
FXYD proteins are novel regulators of Na(+)-K(+)-ATPase (NKA). In fish subjected to salinity challenges, NKA activity in osmoregulatory organs (e.g., gills) is a primary driving force for the many ion transport systems that act in concert to maintain a stable internal environment. Although teleostean FXYD proteins have been identified and investigated, previous studies focused on only a limited...
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ژورنال
عنوان ژورنال: NIPPON SUISAN GAKKAISHI
سال: 2018
ISSN: 0021-5392,1349-998X
DOI: 10.2331/suisan.wa2540