A Novel Approach for Induced Out-of-season Spawning of Eurasian Perch, Perca fluviatilis

Abstract : In this study, the systematic development of a protocol allowing an effective advanced spawning of wild Eurasian perch with the use of salmon gonadoliberin analogue (sGnRHa) was undertaken. The novel approach used in this study involved the application of a strategy of the repeated administration of sGnRHa (i.e., the hormone was given in two doses: priming and resolving) along with an additional thermal stimulation of ovulation. Additionally, the developed protocol was tested for its suitability in the controlled reproduction of domesticated broodstock. The obtained results suggested that the best interval between the hormonal treatments is 7 days when a water temperature of 10°C is kept constant between the two injections and when the resolving injection is followed by rapid increments of temperature up to 12°C, at which spawning is expected. This study revealed that the most suitable priming dose of sGnRHa was 10 µg kg-1 , at which the highest embryonic survival rates (>80%) and
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Daniel Żarski, Katarzyna Palińska-Żarska, Sławomir Krejszeff, Jarosław Król, Sylvain Milla, et al.. A Novel Approach for Induced Out-of-season Spawning of Eurasian Perch, Perca fluviatilis. Aquaculture, Elsevier, 2019, 512, pp.734300. ⟨hal-02300991⟩

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