Influence of food availability, predation risk and initial body size on growth and maturation of Cloeon dipterum (Ephemeroptera: Baetidae)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F16%3A00506400" target="_blank" >RIV/60077344:_____/16:00506400 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.11646/zoosymposia.11.1.9" target="_blank" >http://dx.doi.org/10.11646/zoosymposia.11.1.9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.11646/zoosymposia.11.1.9" target="_blank" >10.11646/zoosymposia.11.1.9</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of food availability, predation risk and initial body size on growth and maturation of Cloeon dipterum (Ephemeroptera: Baetidae)

Popis výsledku v původním jazyce

Larval growth and maturation in aquatic insects are phenotypically plastic and can change in response to the amount and quality of resources, or under predation risk. While better food conditions typically lead to faster growth and earlier maturation at larger body size and hence higher fecundity, the effects of predation risk can vary depending on its strength and selectivity with respect to size or stage. Studies on lotic mayflies (Ephemeroptera) have reported two direct and two indirect life history responses to increased predation risk: slower growth rate and later maturation at the same or smaller size, and faster or unaltered growth rate and earlier maturation at smaller body size. However, life history responses of standing water mayflies to predation risk are unknown. To fill this gap, we carried out a full-factorial laboratory experiment to study the influence of food availability (full/reduced) and predation risk (present/absent predator cues) by dragonfly larvae on growth and maturation of larvae of the lentic mayfly Cloeon dipterum. Males and females responded similarly to food limitation and predation risk. Predation risk had no effect on maturation size, larval mortality and metamorphic failure. However, growth rate, number of moults and development time were all affected by predation risk, and its net effect was modified by food availability and initial body size of the larvae. These results suggest that life history responses to suboptimal conditions depend on body size at the onset of such conditions. Finally, a small group of larvae grew at much slower rates and developed much longer than other individuals of similar initial size, possibly due to bet-hedging or inclusion of multiple genotypes in the experiment.

Název v anglickém jazyce

Influence of food availability, predation risk and initial body size on growth and maturation of Cloeon dipterum (Ephemeroptera: Baetidae)

Popis výsledku anglicky

Larval growth and maturation in aquatic insects are phenotypically plastic and can change in response to the amount and quality of resources, or under predation risk. While better food conditions typically lead to faster growth and earlier maturation at larger body size and hence higher fecundity, the effects of predation risk can vary depending on its strength and selectivity with respect to size or stage. Studies on lotic mayflies (Ephemeroptera) have reported two direct and two indirect life history responses to increased predation risk: slower growth rate and later maturation at the same or smaller size, and faster or unaltered growth rate and earlier maturation at smaller body size. However, life history responses of standing water mayflies to predation risk are unknown. To fill this gap, we carried out a full-factorial laboratory experiment to study the influence of food availability (full/reduced) and predation risk (present/absent predator cues) by dragonfly larvae on growth and maturation of larvae of the lentic mayfly Cloeon dipterum. Males and females responded similarly to food limitation and predation risk. Predation risk had no effect on maturation size, larval mortality and metamorphic failure. However, growth rate, number of moults and development time were all affected by predation risk, and its net effect was modified by food availability and initial body size of the larvae. These results suggest that life history responses to suboptimal conditions depend on body size at the onset of such conditions. Finally, a small group of larvae grew at much slower rates and developed much longer than other individuals of similar initial size, possibly due to bet-hedging or inclusion of multiple genotypes in the experiment.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10616 - Entomology

Projekt

<a href="/cs/project/GA14-29857S" target="_blank" >GA14-29857S: Vliv rizika predace a komplexity prostředí na dynamiku vytváření společenstev vodních bezobratlých</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the Joint Meeting of the International Conference on Ephemeroptera /14./ and International Symposium on Plecoptera /18./

ISBN

—

ISSN

1178-9913

e-ISSN

—

Počet stran výsledku

12

Strana od-do

53-64

Název nakladatele

Magnolia Press

Místo vydání

Auckland

Místo konání akce

Aberdeen

Datum konání akce

31. 5. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000442068700004