Grass carp (Ctenopharyngodon idella) grazing on duckweed (Spirodela polyrhiza).

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12220%2F03%3A00004893" target="_blank" >RIV/60076658:12220/03:00004893 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Grass carp (Ctenopharyngodon idella) grazing on duckweed (Spirodela polyrhiza).

Popis výsledku v původním jazyce

The aims of this experiment were (1) to quantify the ability of grass carp to process duckweed and (2) to assess indirect changes in water chemistry and phytoplankton community, caused by grass carp feeding. Yearlings of grass carp sized 126 # 7.7 mm (TL) and 19.6 g in weight were kept in 9 laminate tanks of 1 m3 for 14 days. Two stocking densities (2 and 6 fish per m3) and control without fish were used. Standard growth rate (SGR) of grass carp fed exclusively on duckweed was 0.70 % body weight (BW) d-1 and food conversion ratio (FCR) reached 2.0 (average water temperature = 21.1 # 3.8 °C). Daily food intake was 0.2 g of duckweed dry weight (DW), i.e., 1 % of average BW of grass carp. SGR of duckweed growing in 20 x 20 cm floating enclosures, differedsignificantly [F(6,2) = 417.9; p = 0.002] between the two stocking densities of grass carp and the control tanks (without fish). Mean SGR of duckweed was 0.02 g g-1 day-1 and the highest SGR was recorded in the control tanks. Both decreas

Název v anglickém jazyce

Grass carp (Ctenopharyngodon idella) grazing on duckweed (Spirodela polyrhiza).

Popis výsledku anglicky

The aims of this experiment were (1) to quantify the ability of grass carp to process duckweed and (2) to assess indirect changes in water chemistry and phytoplankton community, caused by grass carp feeding. Yearlings of grass carp sized 126 # 7.7 mm (TL) and 19.6 g in weight were kept in 9 laminate tanks of 1 m3 for 14 days. Two stocking densities (2 and 6 fish per m3) and control without fish were used. Standard growth rate (SGR) of grass carp fed exclusively on duckweed was 0.70 % body weight (BW) d-1 and food conversion ratio (FCR) reached 2.0 (average water temperature = 21.1 # 3.8 °C). Daily food intake was 0.2 g of duckweed dry weight (DW), i.e., 1 % of average BW of grass carp. SGR of duckweed growing in 20 x 20 cm floating enclosures, differedsignificantly [F(6,2) = 417.9; p = 0.002] between the two stocking densities of grass carp and the control tanks (without fish). Mean SGR of duckweed was 0.02 g g-1 day-1 and the highest SGR was recorded in the control tanks. Both decreas

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Aquaculture International

ISSN

0967-6120

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

325-336

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—