How far away is the next basket of eggs? Spatial memory and perceived cues shape aggregation patterns in a leaf beetle.
Identifieur interne : 000F03 ( Main/Exploration ); précédent : 000F02; suivant : 000F04How far away is the next basket of eggs? Spatial memory and perceived cues shape aggregation patterns in a leaf beetle.
Auteurs : Jörg G. Stephan ; Johan A. Stenberg ; Christer BjörkmanSource :
- Ecology [ 0012-9658 ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Coléoptères, Comportement animal, Mémoire spatiale, Oviposition, Ovule.
- Animaux, Femelle, Feuilles de plante, Taille de la ponte.
English descriptors
- KwdEn :
- MESH :
- physiology : Behavior, Animal, Coleoptera, Oviposition, Ovum, Spatial Memory.
- Animals, Clutch Size, Female, Plant Leaves.
Abstract
Gregarious organisms need to handle the trade-off between increasing food competition and the positive effects of group living, and this is particularly important for ovipositing females. We hypothesized that insect females consider how many conspecifics previously visited a host plant. In a no-choice assay, we show that the gregarious blue willow leaf beetle (Phratora vulgatissima) laid the most eggs and the largest clutches on plants where a sequence of few individual females was released, compared to plants where one or many different females were repeatedly released. Therefore, this species is more sensitive to the indirectly perceived number of conspecifics than the directly perceived number of eggs on a plant. We further hypothesized that females adjust their own intra-plant egg clutch distribution to that of conspecifics and discovered a new behavioral component, i.e., the modulation of distances between clutches. Females adjusted these distances in ways indicating the use of spatial memory, because the largest distance increases were observed on plants with their own clutches, compared to plants with clutches from conspecifics. However, adjustment of aggregation level and distance between clutches occurred only on a suitable, and not on an unsuitable, Salix genotype. We conclude that both behaviors should reduce competition between sibling and non-sibling larvae.
DOI: 10.1890/14-1143.1
PubMed: 26230012
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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Spatial memory and perceived cues shape aggregation patterns in a leaf beetle.</title><author><name sortKey="Stephan, Jorg G" sort="Stephan, Jorg G" uniqKey="Stephan J" first="Jörg G" last="Stephan">Jörg G. Stephan</name></author><author><name sortKey="Stenberg, Johan A" sort="Stenberg, Johan A" uniqKey="Stenberg J" first="Johan A" last="Stenberg">Johan A. 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We hypothesized that insect females consider how many conspecifics previously visited a host plant. In a no-choice assay, we show that the gregarious blue willow leaf beetle (Phratora vulgatissima) laid the most eggs and the largest clutches on plants where a sequence of few individual females was released, compared to plants where one or many different females were repeatedly released. Therefore, this species is more sensitive to the indirectly perceived number of conspecifics than the directly perceived number of eggs on a plant. We further hypothesized that females adjust their own intra-plant egg clutch distribution to that of conspecifics and discovered a new behavioral component, i.e., the modulation of distances between clutches. Females adjusted these distances in ways indicating the use of spatial memory, because the largest distance increases were observed on plants with their own clutches, compared to plants with clutches from conspecifics. However, adjustment of aggregation level and distance between clutches occurred only on a suitable, and not on an unsuitable, Salix genotype. We conclude that both behaviors should reduce competition between sibling and non-sibling larvae.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26230012</PMID><DateCompleted><Year>2015</Year><Month>08</Month><Day>13</Day></DateCompleted><DateRevised><Year>2019</Year><Month>09</Month><Day>02</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0012-9658</ISSN><JournalIssue CitedMedium="Print"><Volume>96</Volume><Issue>4</Issue><PubDate><Year>2015</Year><Month>Apr</Month></PubDate></JournalIssue><Title>Ecology</Title><ISOAbbreviation>Ecology</ISOAbbreviation></Journal><ArticleTitle>How far away is the next basket of eggs? 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We further hypothesized that females adjust their own intra-plant egg clutch distribution to that of conspecifics and discovered a new behavioral component, i.e., the modulation of distances between clutches. Females adjusted these distances in ways indicating the use of spatial memory, because the largest distance increases were observed on plants with their own clutches, compared to plants with clutches from conspecifics. However, adjustment of aggregation level and distance between clutches occurred only on a suitable, and not on an unsuitable, Salix genotype. 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