Sea lice have been a persistent pest of the salmon farming industry for more than 50 years. In this study, we aimed to identify if different strains of Atlantic salmon with discrete long-term lice exposure histories had variable resistance to copepodid attachment and/or different attachment-specific transcriptome patterns. We additionally sought to characterize lice distributions on fins, head, and skin and identify if attachm...

Fishes have repeatedly been introduced into non-native environments around the world, and many of those introductions have come from the pet trade. One of the most important factors that determines the fundamental niche of an introduced fish is tolerance to salinity. Typically, older, larger individuals are more tolerant than younger, smaller individuals. The blood parrot cichlid is an artificially created hybrid ( Vieja melan...

We used restriction‐site associated DNA sequencing for SNP discovery and genotyping of known‐sex green sunfish Lepomis cyanellus DNA samples to search for sex‐diagnostic single nucleotide polymorphisms (SNPs) and restriction‐site associated sequences present in one sex and absent in the other. The bioinformatic analyses discovered candidate SNPs and sex‐specific restriction‐site associated sequences that fit patterns of male o...

Interspecies hybrids have long been studied to further understanding of speciation. Reciprocal crosses sometimes have asymmetric viability, a phenomenon termed ‘Darwin's corollary to Haldane's rule’. It has been proposed that this asymmetry is caused by Dobzhansky–Muller incompatibilities between nuclear genes and cytoplasmic factors ( e.g ., maternal transcripts, mitochondrial genome). The molecular basis of this hypothesis h...

Gynogenetic zebrafish Danio rerio were obtained by activating D. rerio oocytes with UV irradiated common carp Cyprinus carpio sperm and then applying one of four different shocks [two (early) meiotic and two (late) mitotic shocks]. Gynogens produced by three of the shocks survived to maturity. All adult gynogens ( n = 52) except one were found to be male. There was no difference in growth rate between the biparental controls a...