20.500.12556/DiRROS-6096 Metabolic potential, respiration rate and their relationship in offspring of different sizes of marble trout (Salmo marmoratus Cuvier) The size and composition of fish eggs are related to female’s characteristics, such as age, size and individual conditions, and they have an impact on the properties of offspring that are important for their fitness. Electron transport system (ETS) activity and respiration rate (R) of early life history stages (i.e. non-fertilized eggs, eggs at eyed stage and larvae with yolk sac) of 13 females of marble trout (Salmo marmoratus) were measured separately in order to determine their metabolic properties in relation to size. The results showed that larger females produced larger eggs in higher numbers. Growth experiments on the survival of offspring of a single female revealed that the survival rate of early embryos was higher for smaller eggs during the earliest stages, but ultimately the percentage of surviving larvae did not correlate with egg size. The ETS activities and respiration rates of non-fertilized eggs, eyed eggs and larvae differed significantly between 13 females. Both parameters increased with increasing dry mass of the early life history stages, but the increase of respiration rate was greater than that of ETS activity. The lower ETS/R ratios in larger individuals therefore indicate that their energy metabolism was less adaptable to environmental changes than that of smaller ones. Larger egg size could be an advantage under favourable conditions, whereas smaller size could be optimal under stressing circumstances in which the higher metabolic potential enables production of the energy required for metabolism. This is first report on the relationship between ETS activity and respiration rate of the early life history stages in salmonids. Salmo marmoratus fitness metabolism ETS activity ETS/R ratio fishes true false true Angleški jezik Neznan jezik Delo ni kategorizirano 2016-06-09 03:17:55 2024-07-29 11:58:13 2024-07-30 04:00:43 0000-00-00 00:00:00 2015 0 0 str. 39-48 no. 1 Vol. 15 2015 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2015-05-01 574.5 10.4194/1303-2712-v15_1_05 3452239 3451983 http://dx.doi.org/10.4194/1303-2712-v15_1_05 1 https://dirros.openscience.si/Dokument.php?lang=slv&id=6214 RAZ_Brancelj_Anton_2015.pdf RAZ_Brancelj_Anton_2015.pdf 1 CA746E28B9EC3AD406381F2C026D080D 91533a9da98f27bf1ec7d833c4ea3ba65b6b8ce56bc9c025510af7cebb208647 5d847203-4d80-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=27675 Nacionalni inštitut za biologijo 0 0 0