Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Life Sciences
Phenotypic Plasticity Of Japanese Medaka Gill In Response To Changing Salinities, Laura V. Ellis
Phenotypic Plasticity Of Japanese Medaka Gill In Response To Changing Salinities, Laura V. Ellis
Graduate Theses and Dissertations
Japanese medaka (Oryzais latipes) are euryhaline fish, meaning they are capable of surviving in a variety of salinities from fresh water to seawater. The ability to maintain an internal osmotic concentration stems from the phenotypic plasticity of the osmoregulatory organs, the gill, kidney, intestine, and integument. The gill is the main site of osmotic and ionic regulation in fish due to the three-dimensional structure, the direct contact with the outside environment, and the composition of the gill cells. Fish gills are multifunctional as they regulate water movement, acid/base exchange, nitrogenous waste excretion, and ion fluctuations. In freshwater environments, fish are …
Cellular Mechanisms Of Ionoregulation In The Gill Of Japanese Medaka And Rainbow Trout, Rebecca Jo Bollinger
Cellular Mechanisms Of Ionoregulation In The Gill Of Japanese Medaka And Rainbow Trout, Rebecca Jo Bollinger
Graduate Theses and Dissertations
Euryhaline fishes are capable of adapting to a wide range of salinities such as freshwater, brackish water or seawater. Through the combined effort of the gill, kidney and intestine, they are able to osmoregulate to maintain a constant internal hydromineral balance. As the gill is in direct contact with the external environment, it is continuously working to maintain ion and acid/base balance, gas exchange and eliminate nitrogenous waste. Fish in freshwater are subjected to osmotic water gain and diffusional ion loss across the gill and experience the opposite in seawater. Therefore, the gill exhibits extreme plasticity when experiencing a change …