The effect of water temperature, prey availability and presence of conspecifics on prey consumption of pikeperch (Sander lucioperca)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12520%2F22%3A43905728" target="_blank" >RIV/60076658:12520/22:43905728 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.17221/162/2022-CJAS" target="_blank" >https://doi.org/10.17221/162/2022-CJAS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17221/162/2022-CJAS" target="_blank" >10.17221/162/2022-CJAS</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The effect of water temperature, prey availability and presence of conspecifics on prey consumption of pikeperch (Sander lucioperca)

Popis výsledku v původním jazyce

In this study, the effect of water temperature, predator&apos;s sex, prey density, and the presence of conspecifics on prey consumption of pikeperch (Sander lucioperca) was experimentally tested. In Experiment 1, predators of both sexes [males: total length (TL) = 473 +/- 22 mm and body weight (BW) = 1 070 +/- 100 g and females: TL = 464 +/- 12 mm and BW = 1 060 +/- 100 g] were kept in separate tanks and exposed to different densities of prey ( Pseudorasbora parva; 3, 6, 12, 24 and 48 prey fishes per tank) under fixed water temperatures of 4.5 degrees C, 8.5 degrees C, and 12.5 degrees C. After 63 days of this experiment, it was found that pikeperch predation was significantly affected by increasing water temperature. The effect of prey density was significant at all tested temperatures. Pikeperch females tended to have the higher prey consumption than males, although that trend was statistically insignificant. Results suggest that increased feeding demands at temperatures above 4.5 degrees C can lead to predator starvation in conditions of low prey availability. Due to the higher prey consumption, pikeperch females could be more vulnerable to low prey availability during their culture. In Experiment 2, pikeperch were kept at different densities of 1, 2, 4, and 8 individuals per tank supplied with a prey rate of 50 individuals per predator, ensuring ad libitum feeding rate. The average daily prey consumption was significantly higher in the tanks with multiple predators, accounting for 17.6 +/- 3.57 prey fishes/day compared to 11.6 +/- 2.33 prey fishes/day in the tank with a single predator. These results indicate that pikeperch predation activity and prey consumption can be significantly affected by the water temperature, prey availability, and the presence of conspecifics. The findings contribute to understanding the predatory function, natural feeding request of pikeperch and its potential importance for broodstock culture and broodstock final maturation for a successful spawning season. Also, this information can be used for better management of pikeperch pond aquaculture or bio-melioration process in open water bodies and ecosystems.

Název v anglickém jazyce

The effect of water temperature, prey availability and presence of conspecifics on prey consumption of pikeperch (Sander lucioperca)

Popis výsledku anglicky

In this study, the effect of water temperature, predator&apos;s sex, prey density, and the presence of conspecifics on prey consumption of pikeperch (Sander lucioperca) was experimentally tested. In Experiment 1, predators of both sexes [males: total length (TL) = 473 +/- 22 mm and body weight (BW) = 1 070 +/- 100 g and females: TL = 464 +/- 12 mm and BW = 1 060 +/- 100 g] were kept in separate tanks and exposed to different densities of prey ( Pseudorasbora parva; 3, 6, 12, 24 and 48 prey fishes per tank) under fixed water temperatures of 4.5 degrees C, 8.5 degrees C, and 12.5 degrees C. After 63 days of this experiment, it was found that pikeperch predation was significantly affected by increasing water temperature. The effect of prey density was significant at all tested temperatures. Pikeperch females tended to have the higher prey consumption than males, although that trend was statistically insignificant. Results suggest that increased feeding demands at temperatures above 4.5 degrees C can lead to predator starvation in conditions of low prey availability. Due to the higher prey consumption, pikeperch females could be more vulnerable to low prey availability during their culture. In Experiment 2, pikeperch were kept at different densities of 1, 2, 4, and 8 individuals per tank supplied with a prey rate of 50 individuals per predator, ensuring ad libitum feeding rate. The average daily prey consumption was significantly higher in the tanks with multiple predators, accounting for 17.6 +/- 3.57 prey fishes/day compared to 11.6 +/- 2.33 prey fishes/day in the tank with a single predator. These results indicate that pikeperch predation activity and prey consumption can be significantly affected by the water temperature, prey availability, and the presence of conspecifics. The findings contribute to understanding the predatory function, natural feeding request of pikeperch and its potential importance for broodstock culture and broodstock final maturation for a successful spawning season. Also, this information can be used for better management of pikeperch pond aquaculture or bio-melioration process in open water bodies and ecosystems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Czech Journal of Animal Science : Živočišná výroba

ISSN

1212-1819

e-ISSN

1805-9309

Svazek periodika

67

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

9

Strana od-do

465-473

Kód UT WoS článku

000913670600004

EID výsledku v databázi Scopus

2-s2.0-85147714352