Factors Influencing Sun Basking in Red Wood Ants (Formica polyctena): a Field Experiment on Clustering and Phototaxis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11690%2F19%3A10398680" target="_blank" >RIV/00216208:11690/19:10398680 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/19:10398680

Výsledek na webu

<a href="https://doi.org/10.1007/s10905-019-09713-0" target="_blank" >https://doi.org/10.1007/s10905-019-09713-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10905-019-09713-0" target="_blank" >10.1007/s10905-019-09713-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Factors Influencing Sun Basking in Red Wood Ants (Formica polyctena): a Field Experiment on Clustering and Phototaxis

Popis výsledku v původním jazyce

We monitored nest interior and surface temperatures together with two aspects of the sun-basking behavior of wood ants: aggregation (by regular monitoring of occurrence and density of clusters) and phototaxis (tendency to move from shade to sun or vice versa, recorded as a response to artificial shading during sunny weather), using ten nests of Formica polyctena near Vimperk Czechia. Dense clusters occurred only in spring; weak clusters rarely occur the rest of the year. Statistical analysis showed that timing of dense clusters is affected by both environmental parameters (light intensity, insulation status of the nest) and internal nest factors (inner nest temperature, ant population size, nest volume). Phototaxis changed from positive to negative during the year. In spring, ant workers performed the sun basking readily and when shaded moved into the sun. In summer, however, the ants avoided sun basking and aggregated in the shade. The shift from sun basking to sun avoidance was driven mainly by nest surface temperature. The switch occurred when the temperature of sun-exposed nest surface reached 42.8 degrees C, which is two degrees higher than the experimentally measured lethal temperature (LD50) for red wood ants. This shows that two basic components of sun basking, aggregation and sun exposure, are driven by a different set of environmental conditions and their interplay is likely to maintain balance between the needs of the colony to heat up the nest and risk for individual workers arising from overheating during prolonged sun exposure.

Název v anglickém jazyce

Factors Influencing Sun Basking in Red Wood Ants (Formica polyctena): a Field Experiment on Clustering and Phototaxis

Popis výsledku anglicky

We monitored nest interior and surface temperatures together with two aspects of the sun-basking behavior of wood ants: aggregation (by regular monitoring of occurrence and density of clusters) and phototaxis (tendency to move from shade to sun or vice versa, recorded as a response to artificial shading during sunny weather), using ten nests of Formica polyctena near Vimperk Czechia. Dense clusters occurred only in spring; weak clusters rarely occur the rest of the year. Statistical analysis showed that timing of dense clusters is affected by both environmental parameters (light intensity, insulation status of the nest) and internal nest factors (inner nest temperature, ant population size, nest volume). Phototaxis changed from positive to negative during the year. In spring, ant workers performed the sun basking readily and when shaded moved into the sun. In summer, however, the ants avoided sun basking and aggregated in the shade. The shift from sun basking to sun avoidance was driven mainly by nest surface temperature. The switch occurred when the temperature of sun-exposed nest surface reached 42.8 degrees C, which is two degrees higher than the experimentally measured lethal temperature (LD50) for red wood ants. This shows that two basic components of sun basking, aggregation and sun exposure, are driven by a different set of environmental conditions and their interplay is likely to maintain balance between the needs of the colony to heat up the nest and risk for individual workers arising from overheating during prolonged sun exposure.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/LM2015075" target="_blank" >LM2015075: Národní infrastruktura pro komplexní monitorování půdních a vodních ekosystémů v kontextu trvale udržitelného využívání krajiny</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Journal of Insect Behavior

ISSN

0892-7553

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

16

Strana od-do

164-179

Kód UT WoS článku

000477613500009

EID výsledku v databázi Scopus

2-s2.0-85069192105