ISSN:
1573-5168
Keywords:
saffron cod
;
salmon prolactin
;
salmon growth hormone
;
plasma osmolality
;
sodium concentration
;
protein content antifreeze glycoprotein
;
cold adaptation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract In saffron cod, Eleginus gracilis, the antifreeze glycoprotein (AFGP) is present during the winter. The effects of salmon prolactin (sPRL) and growth hormone (sGH) on plasma osmolality, sodium concentration and protein content of the saffron cod were investigated. In the winter, plasma osmolality and protein content decreased following the intraperitoneal injection of sPRL (20 µg kg-1 day-1 × 3) but injection of the same dose of sGH had no effect on either plasma osmolality or protein content. In similar experiments performed during the summer, sPRL and sGH had no effect on these parameters. The results suggest that PRL may act on the kidney, possibly clearing antifreeze glycoprotein (AFGP) by increasing glomerular filtration. The possible role of PRL and GH in the disappearance of AFGP during the summer are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007797906040
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