Drosophila suzukii recently invaded North America and Europe. Populations in Hawaii, California, New York and Nova Scotia are polymorphic for Wolbachia , typically with Wolbachia in D. suzukii , denoted w S uz, is closely related to w R i, the variant prevalent in continental populations of D. simulans . w S uz is also nearly identical to Wolbachia found in D. subpulchrella , plausibly D. suzukii 's sister species. This sugges...

Growth and condition of piscivorous and non‐piscivorous walleye Sander vitreus classified on the basis of their stomach contents were compared to assess the consequences of their trophic flexibility. Piscivorous males showed a significantly higher growth trajectory than non‐piscivorous ones, while there was no difference in the growth of females. No differences were found in the condition of piscivorous and non‐piscivorous wal...