Data for: Spatial and temporal genetic stock composition of river herring bycatch in southern New England Atlantic herring and mackerel fisheries

Anadromous river herring (alewife and blueback herring) persist at historically low abundances and are caught as bycatch in commercial fisheries, potentially preventing recovery despite conservation efforts. We used newly established single-nucleotide polymorphism genetic baselines for alewife and b...

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Bibliographic Details
Main Authors: Reid, Kerry, Palkovacs, Eric, Garza, John Carlos, Gahagan, Benjamin, Schondelmeier, Bradley, Hoey, Jennifer, Hasselman, Daniel, Bowden, Alison, Armstrong, Michael
Format: Dataset
Language:unknown
Published: 2022
Subjects:
Alosa pseudoharengus
A. aestivalis
bycatch
genetic stock identification (GSI)
mixing proportion estimates
mortality estimates
Block Island
Long Island
Long Island Sound
Northwest Atlantic
Online Access:https://zenodo.org/record/7341894
https://doi.org/10.5061/dryad.98sf7m0mz
Description
Summary:Anadromous river herring (alewife and blueback herring) persist at historically low abundances and are caught as bycatch in commercial fisheries, potentially preventing recovery despite conservation efforts. We used newly established single-nucleotide polymorphism genetic baselines for alewife and blueback herring to define fine-scale reporting groups for each species. We then determined the occurrence of fish from these reporting groups in bycatch samples from a Northwest Atlantic fishery over four years.Within sampled bycatch events, the highest proportions of alewife were from the Block Island (34%) and Long Island Sound (22%) reporting groups, while for blueback herring the highest proportions were from the Mid-Atlantic (47%) and Northern New England (24%) reporting groups. We then quantified stock-specific mortality in a focal geographic area (~3500 km2 including Block Island Sound) of high bycatch incidence and sampling effort, where the most accurate estimates of mortality could be made. During this period, we estimate that bycatch took about 4.6 million alewife and 1.2 million blueback herring, highlighting the need to reduce bycatch mortality for the most depleted river herring stocks. We have provided the R-code for simulations to estimate the accuracy of RG for alewife and blueback herring and to estimate mixing proportion estimates for alewife and blueback herring bycatch.Funding provided by: National Science FoundationCrossref Funder Registry ID: http://dx.doi.org/10.13039/100000001Award Number: NSF-DEB 1343916Funding provided by: National Science FoundationCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100008982Award Number: NSF-DEB 1556378Funding provided by: National Science FoundationCrossref Funder Registry ID: http://dx.doi.org/10.13039/501100008982Award Number: NSF-DEB 2102763Funding provided by: Atlantic States Marine Fisheries CommissionCrossref Funder Registry ID: http://dx.doi.org/10.13039/100018323Award Number: ASMFC 15-0105Funding provided by: Atlantic States Marine ...

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