Strategie koexistence 2 druhů: Erpobdella octoculata and E. vilnensis (Hirudinea: Erpobdellidae)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F07%3A00022490" target="_blank" >RIV/00216224:14310/07:00022490 - 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

Strategies of coexistence of two species: Erpobdella octoculata and E. vilnensis (Hirudinea: Erpobdellidae)

Popis výsledku v původním jazyce

Populations of Erpobdella octoculata and E. vilnensis were studied monthly over two years (May 1999 - April 2001) at four sampling points on the river Rokytná (Czech Republic). The water depth and velocity were measured and the Froude number for each sample was calculated to follow flow conditions above the bottom. Temporal differences in biomass of the two species were studied by comparing their wet weights and evaluated by the time series analysis; differences in their diets were evaluated by gut content analyses. Significantly different hydrodynamic preferences for juvenile and adult stages of E. octoculata and E. vilnensis were recorded. In E. vilnensis only, an annual cycle was recorded with a one-month shift of mean weights compared to E. octoculata. This shift, together with the correlation of the leeches' wet weights with their prey sizes and their distinct habitat preferences are suggested as mechanisms that explain their coexistence.

Název v anglickém jazyce

Strategies of coexistence of two species: Erpobdella octoculata and E. vilnensis (Hirudinea: Erpobdellidae)

Popis výsledku anglicky

Populations of Erpobdella octoculata and E. vilnensis were studied monthly over two years (May 1999 - April 2001) at four sampling points on the river Rokytná (Czech Republic). The water depth and velocity were measured and the Froude number for each sample was calculated to follow flow conditions above the bottom. Temporal differences in biomass of the two species were studied by comparing their wet weights and evaluated by the time series analysis; differences in their diets were evaluated by gut content analyses. Significantly different hydrodynamic preferences for juvenile and adult stages of E. octoculata and E. vilnensis were recorded. In E. vilnensis only, an annual cycle was recorded with a one-month shift of mean weights compared to E. octoculata. This shift, together with the correlation of the leeches' wet weights with their prey sizes and their distinct habitat preferences are suggested as mechanisms that explain their coexistence.

Druh

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

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2007

Kód důvěrnosti údajů

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

Název periodika

International Review of Hydrobiology

ISSN

1434-2944

e-ISSN

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Svazek periodika

92

Číslo periodika v rámci svazku

4-5

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

12

Strana od-do

527-538

Kód UT WoS článku

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EID výsledku v databázi Scopus

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