Otolith shape variations between artificially stocked and autochthonous pikeperch (Sander lucioperca)

0539291 - BC 2021 RIV NL eng J - Journal Article
Souza, Allan T. - Soukalová, Kateřina - Děd, Vilém - Šmejkal, Marek - Ribeiro de Moraes, Karlos - Říha, Milan - Muška, Milan - Frouzová, Jaroslava - Kubečka, Jan
Otolith shape variations between artificially stocked and autochthonous pikeperch (Sander lucioperca).
Fisheries Research. Roč. 231, č. 11 (2020), s. 1-9, č. článku 105708. ISSN 0165-7836. E-ISSN 1872-6763
R&D Projects: GA MZe(CZ) QK1920326; GA MŠMT(CZ) EF16_025/0007417
EU Projects: European Commission(XE) 677039 - ClimeFish
Institutional support: RVO:60077344
Keywords : fisheries * fish * freshwater * morphometry * stock discrimination
OECD category: Fishery
Impact factor: 2.422, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.fishres.2020.105708

Fish stocking is one of the most widespread and frequent management strategies in freshwater systems. However, the contribution of stocked fish to the population is seldom investigated, and hence the effectiveness of this strategy is virtually unknown for many populations. Understanding the contribution of stocked fish into the population is crucial because it allows the disentanglement of the confounding effects generated by allochthonous individuals into the estimation of survival and growth rates of the population. To discriminate between the allochthonous and autochthonous individuals in a population, the shape of sagittae otoliths from pikeperch (Sander lucioperca) where compared. Results indicated significant differences among stocked and non-stocked fish, with the former having smaller and wider sagittae otoliths than the latter. Our results suggest that this technique can be used to discriminate the natal origin of fish in a much faster and cheaper way than commonly used techniques.
Permanent Link: http://hdl.handle.net/11104/0316984