The diet of 0+ perch and pikeperch - some of aspects of transition from planktivory to piscivory

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12610%2F05%3A00006319" target="_blank" >RIV/60076658:12610/05:00006319 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The diet of 0+ perch and pikeperch - some of aspects of transition from planktivory to piscivory

Popis výsledku v původním jazyce

Size-related changes in diet of perch (Perca fluviatilis L.) and pikeperch (Sander lucioperca L.) were studied throughout their first year of life until the fry reached about 30 mm SL. In general, ontogenetical changes in diet were similar in both species. Smallest larvae (< 9.5 mm SL) consumed predominantly nauplii and copepodite instars of cyclopoid and calanoid copepods. Rotifers played minor role, especially when evaluating their biomass contribution, but in very low numbers occurred also in the diet of pikeperch larger than 20 mm SL. Cladocerans - Daphnia galeata and Diaphanosoma brachyurum appeared already in the diet of the smallest fry, but their importance increased once the fry reached about 15 mm SL and from that body length especially Daphnia spp. were the most important part of the diet of both species. Even in the largest fry group no piscivorous perch or pikeperch were reported.In the second part of the study pikeperch piscivory is disscussed on an example of case study

Název v anglickém jazyce

The diet of 0+ perch and pikeperch - some of aspects of transition from planktivory to piscivory

Popis výsledku anglicky

Size-related changes in diet of perch (Perca fluviatilis L.) and pikeperch (Sander lucioperca L.) were studied throughout their first year of life until the fry reached about 30 mm SL. In general, ontogenetical changes in diet were similar in both species. Smallest larvae (< 9.5 mm SL) consumed predominantly nauplii and copepodite instars of cyclopoid and calanoid copepods. Rotifers played minor role, especially when evaluating their biomass contribution, but in very low numbers occurred also in the diet of pikeperch larger than 20 mm SL. Cladocerans - Daphnia galeata and Diaphanosoma brachyurum appeared already in the diet of the smallest fry, but their importance increased once the fry reached about 15 mm SL and from that body length especially Daphnia spp. were the most important part of the diet of both species. Even in the largest fry group no piscivorous perch or pikeperch were reported.In the second part of the study pikeperch piscivory is disscussed on an example of case study

Druh

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

CEP obor

GL - Rybářství

OECD FORD obor

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Projekt

<a href="/cs/project/QG50058" target="_blank" >QG50058: Využití reprodukčního potenciálu střevličky východní (Pseudorasbora parva) jako potravní ryby při odchovu plůdku candáta obecného (Sander lucioperca)</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2005

Kód důvěrnosti údajů

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

Název periodika

Bulletin VÚRH Vodňany

ISSN

0007-389X

e-ISSN

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Svazek periodika

41

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

99-106

Kód UT WoS článku

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EID výsledku v databázi Scopus

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