Seasonal dynamics of prey utilization and individual specialization in a generalist spider in a pear orchard

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00119762" target="_blank" >RIV/00216224:14310/21:00119762 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43410/21:43920208

Výsledek na webu

<a href="https://doi.org/10.1016/j.biocontrol.2021.104763" target="_blank" >https://doi.org/10.1016/j.biocontrol.2021.104763</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.biocontrol.2021.104763" target="_blank" >10.1016/j.biocontrol.2021.104763</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Seasonal dynamics of prey utilization and individual specialization in a generalist spider in a pear orchard

Popis výsledku v původním jazyce

Populations of generalist predators are often comprised of a mixture of specialist and generalist individuals and this intraspecific variation in prey utilization may affect pest suppression. However, little is known about seasonal changes in prey utilization by generalist predators, especially during winter, when some generalist predators exert strong biocontrol effects. We used prey preference experiments on Philodromus cespitum (Araneae: Philodromidae) and molecular gut-content analyses of Philodromus spp. (dominated 85% by P. cespitum) to study the dynamics of spider specialization in a pear orchard during the non-growing season. In the laboratory, P. cespitum preferred springtails (Collembola) over the pear psylla, Cacopsylla pyri, an important pest of pear. The presence of springtails in guts of Philodromus spp. did not affect detection of psylla by molecular gut-content analysis in specimens collected from the pear orchard. The philodromid population comprised of a mixture of specialists and generalists in winter, but was composed mainly of generalists in spring. Greater variation in prey utilization during winter most likely reflects a patchy distribution of prey and philodromids switching to a less active hunting mode. Seasonal specialization of individual generalist predators could be the result of their ability to change hunting mode in response to changing environmental conditions and prey distribution. Our study demonstrates that alternative (collembolan) prey are unlikely to affect philodromid predation on psyllids and suggests that changes occur in the spatial structure of predator-pest interactions from winter to spring.

Název v anglickém jazyce

Seasonal dynamics of prey utilization and individual specialization in a generalist spider in a pear orchard

Popis výsledku anglicky

Populations of generalist predators are often comprised of a mixture of specialist and generalist individuals and this intraspecific variation in prey utilization may affect pest suppression. However, little is known about seasonal changes in prey utilization by generalist predators, especially during winter, when some generalist predators exert strong biocontrol effects. We used prey preference experiments on Philodromus cespitum (Araneae: Philodromidae) and molecular gut-content analyses of Philodromus spp. (dominated 85% by P. cespitum) to study the dynamics of spider specialization in a pear orchard during the non-growing season. In the laboratory, P. cespitum preferred springtails (Collembola) over the pear psylla, Cacopsylla pyri, an important pest of pear. The presence of springtails in guts of Philodromus spp. did not affect detection of psylla by molecular gut-content analysis in specimens collected from the pear orchard. The philodromid population comprised of a mixture of specialists and generalists in winter, but was composed mainly of generalists in spring. Greater variation in prey utilization during winter most likely reflects a patchy distribution of prey and philodromids switching to a less active hunting mode. Seasonal specialization of individual generalist predators could be the result of their ability to change hunting mode in response to changing environmental conditions and prey distribution. Our study demonstrates that alternative (collembolan) prey are unlikely to affect philodromid predation on psyllids and suggests that changes occur in the spatial structure of predator-pest interactions from winter to spring.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10616 - Entomology

Projekt

<a href="/cs/project/QK1910296" target="_blank" >QK1910296: Efektivita nových postupů regulace škodlivých činitelů v ovocnářství</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Biological Control

ISSN

1049-9644

e-ISSN

—

Svazek periodika

163

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

„104763“

Kód UT WoS článku

000700603300006

EID výsledku v databázi Scopus

2-s2.0-85115036990