Document Detail


Winter predation of diapausing cocoons of slug caterpillars (lepidoptera: limacodidae).
MedLine Citation:
PMID:  22182555     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Predators exert strong top-down pressure on herbivorous insects, but research on how predators affect herbivore fitness often focuses on the more active juvenile and adult life stages while ignoring the pupal or cocoon life stage. Few studies have investigated predation of lepidopteran pupae or cocoons and even fewer have investigated species that are not forest pests. Here we present a study on overwinter survival for two moth species in the family Limacodidae, a group of polyphagous species found in deciduous forests. We placed cocoons of the saddleback caterpillar, Acharia stimulea (Clemens), and the spiny oak-slug caterpillar, Euclea delphinii (Boisduval), in the field under saplings of six different tree species and monitored predation and survival. This is the first study to examine predation rate among different host plants within a site. We found that cocoon predation was fairly high and differed significantly between limacodid species (29% for A. stimulea vs. 22% for E. delphinii). Predation rate did not differ among the six host plant species that we tested and also did not vary annually. Through phenotypic selection analyses, we found that cocoon mass affected both the likelihood of predation and overwinter survival; larger cocoons were less likely to be depredated and more likely to successfully emerge the following year. Overall our results indicate that cocoon predation is an important source of mortality for these two limacodid species and that there may be positive selection for greater cocoon mass for both limacodid species.
Authors:
Shannon M Murphy; John T Lill
Related Documents :
22003005 - Development and application of an enzymatic and cell flotation treatment for the recove...
21704515 - Properties of oil and char derived from slow pyrolysis of tetraselmis chui.
21664995 - Polycomb-group mediated epigenetic mechanisms through plant evolution.
21972495 - Plant species potentially useful in the phytostabilization process for the abandoned cm...
24155925 - Application of a novel functional gene microarray to probe the functional ecology of am...
19376765 - Self-healing of voids in the wax coating on plant surfaces.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Environmental entomology     Volume:  39     ISSN:  1938-2936     ISO Abbreviation:  Environ. Entomol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2011-12-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7502320     Medline TA:  Environ Entomol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1893-902     Citation Subset:  IM    
Affiliation:
Department of Biological Sciences, George Washington University, Washington, DC 20052, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Targets of an Invasive Species: Oviposition Preference and Larval Performance of Cactoblastis cactor...
Next Document:  Field Biology of Edessa rufomarginata (Hemiptera: Pentatomidae): Phenology, Behavior, and Patterns o...