Impact ID |
Scientific Name
|
Impact Type
|
Study Type
|
Study Location
|
Impact Description
|
Geographic Location
|
Reference
|
2721
|
Alosa aestivalis
|
Competition
|
Anecdotal
|
Field
|
If blueback herring became established throughout Lake Ontario and/or spread to other Great Lakes it
could impede recovery of depressed populations of native fishes such as cisco and lake trout.
|
Oneda-Oswago River, USA
|
14488
|
2723
|
Alosa aestivalis
|
Competition
|
Anecdotal
|
N/A
|
Blueback herring are believed
to have the potential to displace rainbow smelt and other native forage fish.
|
|
18753
|
2794
|
Alosa aestivalis
|
Competition
|
Anecdotal
|
Field
|
Blueback Herring in a South Carolina reservoir ate mostly zooplankton, including Bosmina sp. (13-78% of biomass), and Cyclapoid Copepods (12-78%). Blueback Herring diets differed significantly from diets of Threadfin Shad, which consumed proportionately more Bosmina sp. and rotifers; however, if food resources are limited there could be competition between these species.
|
|
14491
|
2795
|
Alosa aestivalis
|
Competition
|
Observational
|
Field
|
Blueback Herring (Alosa aestivalis) compete for food with Alewife in the Great lakes.
|
|
14488
|
2799
|
Alosa aestivalis
|
Competition
|
Anecdotal
|
Field
|
Blueback Herring in South Carolina reservoirs probably compete for food resources with other planktivores and juvenile fishes such as Black Crappie.
|
|
26640
|
2802
|
Alosa aestivalis
|
Competition
|
Observational
|
Field
|
In a South Carolina reservoir, Blueback Herring consumed some juvenile fishes (Clupeid and Centrarchid), but mainly selectively consumed larger zooplankton such as Holopedium amazonicum, Mesocyclops edax, Bosmina longirostris, and Leptodora kindtii. Threadfin Shad diets were dominated by smaller zooplankton including Bosmina longirostris and Rotifera, with relatively little overlap with Blueback Herring.
|
|
24389
|
2806
|
Alosa aestivalis
|
Competition
|
Observational
|
Field
|
There was high dietary overlap in zooplankton prey between both juvenile and adult Blueback Herring in Lewis Smith Lake, AL, with adult Threadfin Shad and larval Lepomis spp.
|
|
33786
|
2808
|
Alosa aestivalis
|
Competition
|
Observational
|
Field
|
In Nova Scotia, small Blueback Herring diets comprised 48% benthic prey, large Blueback Herring diets 81% benthic prey, and both small and large Alewife diets between 85-88% benthic prey, with a higher proportion of detritus than Blueback Herring.
|
|
1897
|