Glycerol synthesis in the rainbow smelt Osmerus mordax
نویسندگان
چکیده
منابع مشابه
Relationship between food availability, glycerol and glycogen levels in low-temperature challenged rainbow smelt Osmerus mordax.
Rainbow smelt Osmerus modax accumulate glycerol in winter that serves as an antifreeze. Fish were held at 8 degrees C, or subjected to a decrease in water temperature to -1 degrees C over a 19 day period, and subsequently maintained at -1 degrees C from 15 January to 11 May 2004. Starved fish did not survive the challenge of temperature decrease, with death ensuing above the typical freeze poin...
متن کاملGlycerol loss to water exceeds glycerol catabolism via glycerol kinase in freeze-resistant rainbow smelt (Osmerus mordax).
Rainbow smelt accumulate high amounts of glycerol in winter. In smelt, there is a predictable profile of plasma glycerol levels that starts to increase in November (<5 μmol/ml), peaks in mid-February (>200 μmol/ml), and thereafter decreases to reach the initial levels in the beginning of May. The aim of this study was to investigate the respective role of the two main mechanisms that might be i...
متن کاملLow temperature directly activates the initial glycerol antifreeze response in isolated rainbow smelt (Osmerus mordax) liver cells.
Rainbow smelt (Osmerus mordax) accumulate high levels of glycerol in winter that serve as an antifreeze. Liver glycogen is a source of glycerol during the early stages of glycerol accumulation, whereas dietary glucose and amino acids are essential to maintain rates of glycerol synthesis. We presently report rates of glycerol and glucose production by isolated hepatocytes. Cells from fish held a...
متن کاملOsmotic pressure-adaptive responses in the eye tissues of rainbow smelt (Osmerus mordax)
PURPOSE The rainbow smelt (Osmerus mordax), is a teleost fish, which avoids freezing by becoming virtually isosmotic with seawater. The effects that such massive changes in osmolarity have on both its visual system and its highly evolved and specialized circulation are not known. New knowledge about the osmotic adaptation of the rainbow smelt eye is highly relevant to the adaptation and surviva...
متن کاملEvidence of rainbow smelt (Osmerus mordax) spawning in Mohican Canyon, a tributary of Otsego Lake
Groups of Rainbow smelt were observed spawning in the first riffle in Mohican Canyon upstream of Otsego Lake. Adult smelt were collected with a shore seine on 22 April 2001. Sampled fish (n=17) had an average length of 176.8 mm total length (TL) and weight of 34.2 g. Despite these observations, no larval, juvenile or adult smelt were collected in any trawling or gill netting activities in Otseg...
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ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1995
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.198.12.2569