Protein metabolism during sexual maturation in female Atlantic salmon (Salmo salar L) |
| |
Authors: | N B Martin D F Houlihan C Talbot R M Palmer |
| |
Institution: | (1) Department of Zoology, University of Aberdeen, UK, AB9 2TN;(2) Freshwater Fisheries Laboratory, Pitlochry, Pertshire, UK, PH16 5LB;(3) Rowett Research Institute, Bucksburn, Aberdeen, UK, AB9 2SB;(4) Department of Zoology, University of Aberdeen, UK, AB9 2TN |
| |
Abstract: | Body composition and fractional rates of protein synthesis (percentage of the protein mass synthesized per day) were determined
in female Atlantic salmon returning to the River Tay, Scotland in July and in October after a 95 day period without food,
during which time the animals became sexually mature. During the 95 day period of starvation/sexual maturation the ventricle
and red muscle remained as a constant proportion of fresh weight whereas the liver, gill and ovary increased and the stomach
and white muscle decreased. Fractional rates of protein synthesis increased markedly in the liver, stomach and ovary during
the period of starvation/sexual maturation. In the gill, ventricle and white muscle fractional protein synthesis rates increased
slightly or remained constant. From the estimated rates of protein loss or gain in the various tissues it is concluded that
there is considerable protein turnover and repartitioning of amino acids during the period of starvation and sexual maturation.
The absolute rate of protein synthesis rates in the ovary indicates that this tissue made the largest contribution to the
energy and amino acid demands of the fish, whilst most of the amino acids required for maturation of the ovary were derived
from white muscle, principally as the result of increased muscle protein degradation. |
| |
Keywords: | protein synthesis sexual maturation Salmo salar |
本文献已被 SpringerLink 等数据库收录! |
|