Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae)
Abstract Movement between host plants during the growing season is a common behaviour among insect herbivores, although the mechanisms promoting these movements are poorly understood for many systems. Two possible reasons why insect herbivores relocate include compensating for host plant quantity an...
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Language: | English |
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Online Access: | http://dx.doi.org/10.4039/tce.2016.22 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X16000225 |
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crcambridgeupr:10.4039/tce.2016.22 2023-05-15T14:36:28+02:00 Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) Greyson-Gaito, Christopher J. Barbour, Matthew A. Rodriguez-Cabal, Mariano A. Crutsinger, Gregory M. Henry, Gregory H.R. 2016 http://dx.doi.org/10.4039/tce.2016.22 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X16000225 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms The Canadian Entomologist volume 148, issue 6, page 673-682 ISSN 0008-347X 1918-3240 Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology journal-article 2016 crcambridgeupr https://doi.org/10.4039/tce.2016.22 2023-02-24T07:13:59Z Abstract Movement between host plants during the growing season is a common behaviour among insect herbivores, although the mechanisms promoting these movements are poorly understood for many systems. Two possible reasons why insect herbivores relocate include compensating for host plant quantity and/or quality changes and the avoidance of natural enemies. The Arctic caterpillar ( Gynaephora groenlandica (Wocke); Lepidoptera: Lymantriidae) moves several metres each day, feeds on its patchily distributed host plant, Arctic willow ( Salix arctica Pallas; Salicaceae), and has two main natural enemies, the parasitoids Exorista thula Wood (Diptera: Tachinidae) and Hyposoter diechmanni (Nielsen) (Hymenoptera: Ichneumonidae). We physically moved caterpillars between Arctic willows and restricted other caterpillar individuals each to a single willow throughout the active period of Arctic caterpillars. We found that growth rate, herbivory rate, and the proportion of available leaf fascicles eaten were higher for experimentally moved caterpillars. Parasitoid abundances were low and did not differ between experimentally moved and stationary caterpillars. Taken together, our study addresses the bottom–up and top–down controls on insect herbivore movement during the short duration of the growing season in the Arctic. Our results suggest that caterpillars are likely moving to new willow shrubs to access high quality resources. Article in Journal/Newspaper Arctic Cambridge University Press (via Crossref) Arctic The Canadian Entomologist 148 6 673 682 |
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Open Polar |
collection |
Cambridge University Press (via Crossref) |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology |
spellingShingle |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology Greyson-Gaito, Christopher J. Barbour, Matthew A. Rodriguez-Cabal, Mariano A. Crutsinger, Gregory M. Henry, Gregory H.R. Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
topic_facet |
Insect Science Molecular Biology Physiology Ecology, Evolution, Behavior and Systematics Structural Biology |
description |
Abstract Movement between host plants during the growing season is a common behaviour among insect herbivores, although the mechanisms promoting these movements are poorly understood for many systems. Two possible reasons why insect herbivores relocate include compensating for host plant quantity and/or quality changes and the avoidance of natural enemies. The Arctic caterpillar ( Gynaephora groenlandica (Wocke); Lepidoptera: Lymantriidae) moves several metres each day, feeds on its patchily distributed host plant, Arctic willow ( Salix arctica Pallas; Salicaceae), and has two main natural enemies, the parasitoids Exorista thula Wood (Diptera: Tachinidae) and Hyposoter diechmanni (Nielsen) (Hymenoptera: Ichneumonidae). We physically moved caterpillars between Arctic willows and restricted other caterpillar individuals each to a single willow throughout the active period of Arctic caterpillars. We found that growth rate, herbivory rate, and the proportion of available leaf fascicles eaten were higher for experimentally moved caterpillars. Parasitoid abundances were low and did not differ between experimentally moved and stationary caterpillars. Taken together, our study addresses the bottom–up and top–down controls on insect herbivore movement during the short duration of the growing season in the Arctic. Our results suggest that caterpillars are likely moving to new willow shrubs to access high quality resources. |
format |
Article in Journal/Newspaper |
author |
Greyson-Gaito, Christopher J. Barbour, Matthew A. Rodriguez-Cabal, Mariano A. Crutsinger, Gregory M. Henry, Gregory H.R. |
author_facet |
Greyson-Gaito, Christopher J. Barbour, Matthew A. Rodriguez-Cabal, Mariano A. Crutsinger, Gregory M. Henry, Gregory H.R. |
author_sort |
Greyson-Gaito, Christopher J. |
title |
Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
title_short |
Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
title_full |
Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
title_fullStr |
Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
title_full_unstemmed |
Freedom to move: Arctic caterpillar (Lepidoptera) growth rate increases with access to new willows (Salicaceae) |
title_sort |
freedom to move: arctic caterpillar (lepidoptera) growth rate increases with access to new willows (salicaceae) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
http://dx.doi.org/10.4039/tce.2016.22 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0008347X16000225 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
The Canadian Entomologist volume 148, issue 6, page 673-682 ISSN 0008-347X 1918-3240 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.4039/tce.2016.22 |
container_title |
The Canadian Entomologist |
container_volume |
148 |
container_issue |
6 |
container_start_page |
673 |
op_container_end_page |
682 |
_version_ |
1766309081723699200 |