Size does not always matter: different foraging tactics and the ideal free distribution in two competing fish species

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F06%3A00006854" target="_blank" >RIV/60076658:12310/06:00006854 - 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

Size does not always matter: different foraging tactics and the ideal free distribution in two competing fish species

Popis výsledku v původním jazyce

We study effects of intra- and inter-specific competition on spatial distribution of two fish species (white cloud mountain minnow {Tanichthys albonubes} and giant danio {Danio aequipinnatus}) in an aquarium with two feeding sites. When alone, each species distributed between the sites in the ratio of food supply rates, conforming with the Parker's matching rule. When together, the distribution of the smaller species (minnow) still followed the matching rule but the larger fish (danio) selected the feeding site with lower food supply rate disproportionately more often relative to the single-species experiment. Hence, intraspecific competition did not affect feeding site preferences in any species, yet the interspecific competition between minnow and danio was asymmetric, minnow having been the dominant competitor. Diverse foraging tactics may have evoked this asymmetry: we observed that the time to reach a food item was shorter for minnow which also stayed closer to a feeding site. Sur

Název v anglickém jazyce

Size does not always matter: different foraging tactics and the ideal free distribution in two competing fish species

Popis výsledku anglicky

We study effects of intra- and inter-specific competition on spatial distribution of two fish species (white cloud mountain minnow {Tanichthys albonubes} and giant danio {Danio aequipinnatus}) in an aquarium with two feeding sites. When alone, each species distributed between the sites in the ratio of food supply rates, conforming with the Parker's matching rule. When together, the distribution of the smaller species (minnow) still followed the matching rule but the larger fish (danio) selected the feeding site with lower food supply rate disproportionately more often relative to the single-species experiment. Hence, intraspecific competition did not affect feeding site preferences in any species, yet the interspecific competition between minnow and danio was asymmetric, minnow having been the dominant competitor. Diverse foraging tactics may have evoked this asymmetry: we observed that the time to reach a food item was shorter for minnow which also stayed closer to a feeding site. Sur

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

2006

Kód důvěrnosti údajů

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

Název periodika

Evolutionary Ecology Research

ISSN

1522-0613

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

929-942

Kód UT WoS článku

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EID výsledku v databázi Scopus

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