Behavior and physiological status of pond-cultured pikeperch (Sander lucioperca) broodstock effected by sexual interactions throughout semi-artificial reproduction
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This study investigated physiological and behavioral responses of pikeperch broodstock related to sexual interactions under controlled conditions throughout semi-artificial reproduction. Blood samples taken from pond-cultured pikeperch broodstock were analyzed to assess the stress response at different stages of semi-artificial reproduction protocol. Sampling was performed as follows: before hormonal induction (control), 24 h (SP24) and 48 h (SP48) after spawning when males and females were separated, and 24 h (NS24) and 48 h (NS48) after spawning when males and females were kept together. The separation immediately after spawning had a significant effect on physiological state of broodstock. Separation affected indices of erythrocyte count, hematocrit (packed cell volume, PCV), glucose (GLU), and mean corpuscular volume (MCV) in females and levels of lactate and leukocytes in males. Monitoring of pikeperch behavior in groups NS24 and NS48 revealed the strong aggressive paternal behavior of male to females. Attacks mainly targeted the caudal fin and resulted in female mortality in group NS48.
KeywordsAquaculture Blood analyzing Ecology Management Mortality Spawning
The study was financially supported by the Ministry of Education, Youth and Sports of the Czech Republic (projects CENAKVA [No. CZ.1.05/2.1.00/01.0024] and Biodiversity [No. CZ.02.1.01/0.0/0.0/16_025/0007370]) and by the Ministry of Agriculture of the Czech Republic (project NAZV QK1710310).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
The study performed and the experimental broodstock handled were in accordance with national and international guidelines for the protection of animal welfare (EU-harmonized Animal Welfare Act of the Czech Republic). The experimental unit is licensed (No. 2293/2015-MZE-17214 and No. 55187/2016-MZE-17214 within the project NAZV QK1710310) according to the Czech National Directive (the Law against Animal Cruelty, No. 246/1992).
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