INNOVATIVE AQUACULTURE TECHNOLOGY REGARDING THE INFLUENCE OF THE POPULATION DENSITY ON THE DEVELOPMENT OF THE SPECIES SANDER LUCIOPERCA (LINNAEUS - 1758) IN THE POSTEMBRYONIC PERIOD
DOI:
https://doi.org/10.1199/tdc8ga37Keywords:
density, fry, pikeperch, survival weightAbstract
The pikeperch (Sander lucioperca, L.- 1758) is one of the freshwater species recently introduced in intensive aquaculture. In the last decade great efforts have been made in the direction of developing the intensive culture of this species. The population density is a very important technological parameter for fish growth, in all stages of development and is specific to the species, age and technology applied, the most difficult to achieve, the most significant losses being recorded in the post-embryonic period. Therefore, the growth of the pikeperch in the post-embryonic period was experienced in “Evos” type fiberglass pools, in three experimental versions, with three different population densities as fallows: V1-1000 ex./basin, V2-2000 ex./basin and V3- 3000 ex./basin. There were two critical moments in the post-embryonic development period: the first was at the beginning of exogenous feeding time, and the second during the swelling of the gas bladder. The experiments were performed at Fish Culture Research and Development Station of Nucet, in triplicate, during three growing seasons (2021, 2022 and 2023). The best results were obtained in V1 version, where the survival rate was 69.5% in 2023, the average individual growth rate in 2022 was 1.555 g/ex., and the Fulton coefficient was between 0.93 - 1.13.References
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