River Herring Spawning Migrations Smithsonian Environmental Research

River Herring Spawning Migrations Smithsonian Environmental Research These two species, alewife alosa pseudoharengus and blueback herring alosa aestivalis are migratory fish used to be among the most abundant fish in the chesapeake bay, but in the past few decades their populations have declined over 90% due to habitat loss, overfishing, and other causes. our lab is studying the spawning migrations of the river. Alewife (alosa pseudoharengus) and blueback herring (alosa aestivalis), collectively referred to as river herring, are anadromous fish living much of their life in the ocean but which migrate to freshwater to spawn in the same streams they were born in. in the chesapeake bay region, alewife begin their spawning runs in late february and early march with blueback herring appearing in april.

Conservation Of River Herring Spawning Runs Smithsonian Environmental Project goal. the goal of the movement of life initiative is to develop the science, technology, analytical tools and models to conserve and manage movement as a critical process for maintaining biodiversity and healthy ecosystems. at serc, we focus on coastal fish and invertebrates and their connections with freshwater and the open ocean. Present address: smithsonian environmental research center, edgewater, maryland 21037, usa. in this study, we investigated the upstream spawning migrations of river herring alosa spp. in 12. In the spring of 2014, a team of researchers led by dr. matthew ogburn, from the smithsonian environmental research center, evaluated the use of imaging sonar to count migrating river herring on their spawning run in the choptank river on the eastern shore of maryland. Given the interannual and interpopulation variability in environmental regimes and run dynamics (ogburn et al. 2017; rosset et al. 2017; lombardo et al. 2019), a multi year, regional examination of river herring migration patterns is needed to disentangle the variety of possible drivers of river herring migrations and aid in optimizing.

Conservation Of River Herring Spawning Runs Smithsonian Environmental In the spring of 2014, a team of researchers led by dr. matthew ogburn, from the smithsonian environmental research center, evaluated the use of imaging sonar to count migrating river herring on their spawning run in the choptank river on the eastern shore of maryland. Given the interannual and interpopulation variability in environmental regimes and run dynamics (ogburn et al. 2017; rosset et al. 2017; lombardo et al. 2019), a multi year, regional examination of river herring migration patterns is needed to disentangle the variety of possible drivers of river herring migrations and aid in optimizing. Historical loss of river and stream habitats due to impassable dams has contributed to the severe decline of many fish species. anadromous fishes that migrate from the sea to freshwater streams to spawn have been especially impacted as dams restrict these fish from accessing ancestral spawning grounds. in 2018, bloede dam was removed from the patapsco river near baltimore, maryland, restoring. To assess the response of anadromous river herring, alewife (alosa pseudoharengus) and blueback herring (alosa aestivalis), to the 2018 removal of bloede dam on the patapsco river, md by monitoring environmental dna (edna), eggs, tagged fish (pit tags), and adult fish (electrofishing samples) at locations upstream and downstream of the dam site during their spawning migrations.

Conservation Of River Herring Spawning Runs Smithsonian Environmental Historical loss of river and stream habitats due to impassable dams has contributed to the severe decline of many fish species. anadromous fishes that migrate from the sea to freshwater streams to spawn have been especially impacted as dams restrict these fish from accessing ancestral spawning grounds. in 2018, bloede dam was removed from the patapsco river near baltimore, maryland, restoring. To assess the response of anadromous river herring, alewife (alosa pseudoharengus) and blueback herring (alosa aestivalis), to the 2018 removal of bloede dam on the patapsco river, md by monitoring environmental dna (edna), eggs, tagged fish (pit tags), and adult fish (electrofishing samples) at locations upstream and downstream of the dam site during their spawning migrations.