Genetic stock composition of marine bycatch reveals disproportional impacts on depleted river herring genetic stocks

摘要: Bycatch of mid-trophic-level anadromous fishes that connect marine and freshwater ecosystems is a growing conservation concern. Anadromous alewife (Alosa pseudoharengus) blueback herring aestivalis) are important components coastal food webs, but have experienced dramatic declines in the abundances spawning adults. Freshwater-focused restoration efforts yielded few consistent signs recovery, raising concerns bycatch Northwest Atlantic commercial fisheries may be negating these actions. Using data from 15 microsatellites genotyped for baseline populations bycatch, we conducted genetic stock identification to understand how was partitioned among previously identified regional stocks. We then combined this information with fishery observer estimate stock-specific mortality southern New England (2012–2013). overall, especially fish...