Riyad Hakim, Saeed Salem Abstract With the rapid collection of large network data such as biological networks and social networks, it has become very important to develop efficient techniques for network analysis. In many domains, additional attribute data can be associated with entities and relationships in the network, where the network data represents relationships among…
Author: Betsy Boyer
Evolutionary dynamics of piRNA clusters in Drosophila
Filip Wierzbick, Robert Kofler, Sarah Signor Abstract Small RNAs produced from transposable element (TE)-rich sections of the genome, termed piRNA clusters, are a crucial component in the genomic defence against selfish DNA. In animals, it is thought the invasion of a TE is stopped when a copy of the TE inserts into a piRNA cluster,…
Size constrains oxygen delivery capacity within but not between bumble bee castes in Bombus impatiens
Rikki Walter, Joseph. P. Rinehart, Michael E. Dillon, and Kendra. J. Greenlee Abstract Bumble bees are eusocial, with distinct worker and queen castes that vary strikingly in size and life-history. The smaller workers rely on energetically-demanding foraging flights to collect resources for rearing brood. Queens can be 3 to 4 times larger than workers, flying…
A dose of experimental hormesis: When mild stress protects and improves animal performance
Raymond Berry, III and Giancarlo López-Martínez Abstract The adaptive response characterized by a biphasic curve is known as hormesis. In a hormesis framework, exposure to low doses leads to protective and beneficial responses while exposures to high doses are damaging and detrimental. Comparative physiologists have studied hormesis for over a century, but our understanding of…