20.500.12556/RUL-145099 Reproduction parameters of hatchery reared grayling (Thymallus thymallus) females European grayling (Thymallus thymallus) is an endangered salmonid fish species and its populations have decreased considerably in European waters in recent decades. One of the conservation measures applied to grayling is stocking with hatchery-reared fish. To advance the knowledge of grayling reproduction in the hatchery, husbandry data were systematically collected in the period from 2006 to 2015 during grayling spawning seasons and analyzed to quantify grayling female reproductive parameters such as fecundity, egg size, and embryo survival to the eyed egg stage. Data was collected for first time spawners (3 years old) and repeat spawners reared in the hatchery. Statistically significant differences were found for the number of eggs between first time spawners, producing on average 3600 eggs, and repeat spawners, producing on average 8000 eggs. Absolute fecundity was positively correlated to grayling female total length and weight for both first time and repeat spawners. However, relative fecundity did not correlate with these parameters. A positive correlation was observed between female total length and mean egg weight for repeat spawners, while the correlation was negative for first time spawners. Heavier eggs tended to have a higher rate of survival until the eyed egg stage, though the correlation was stronger for first time spawners than for repeat spawners. Due to the higher reproductive success of repeat spawners, it could be concluded that larger and older grayling females should be included in hatchery reproduction. broodstock fecundity fertilization egg size egg survival ribe lipan Thymallus thymallus reprodukcija samice true false true Angleški jezik Slovenski jezik Članek v reviji 2023-04-05 12:49:30 2023-04-05 12:49:31 2023-10-21 03:45:00 0000-00-00 00:00:00 2023 0 0 11 str. art. 107196 Vol. 249 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 597.2/.5 0378-4320 10.1016/j.anireprosci.2023.107196 138761219 1-s2.0-S0378432023000106-main.pdf 1-s2.0-S0378432023000106-main.pdf 1 2552A2627AC4BBCECE8483FBD97BC478 a39881c20c4de3915201d0223d0d66f6af1deaf1d4eef824eed59126f16a52ee 26df61ce-d3a0-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167745 https://www.sciencedirect.com/science/article/pii/S0378432023000106 1 6b59dcb1-d39f-11ed-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=167744 Biotehniška fakulteta 0 0 0