Behaviour 2019
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Altered gene expression in response to predator stress in wolf spider.
Alexander Berry, Ann L Rypstra. Miami Unviersity, Oxford, OH, United States

Predator exposure has a wide variety of impacts on animals, including behavioral and developmental changes and can alter phenotypes in the next generation.  One possible explanation for these changes is altered gene expression between exposed and unexposed individuals and their offspring.  We used Pardosa milvina, a small, generalist wolf spider to examine if exposure to predator stress, cues from a larger spider, would cause changes in gene expression in exposed females and their offspring.  Females were exposed to predator cues throughout their juvenile development and upon reaching adulthood were used for transcriptome analysis.  Other females were allowed to produce young, which were used in transcriptome analysis upon reaching their third instar phase.  Over 909 differentially expressed genes were identified in adults and nearly 289 were identified in juveniles.  Unexpectedly, the 289 genes differentially expressed in offspring did not represent a subset of those differentially expressed in their parents.  Several of these genes were linked with stress response pathways at both stages and several cellular pathways were found to be altered by predator exposure.