Cited by 72Fish Ecology and Management StudiesAquatic Ecosystems and Phytoplankton DynamicsMarine and fisheries research

Nutrient loading by anadromous alewife (Alosa pseudoharengus): contemporary patterns and predictions for restoration efforts

West, Derek C., Walters, Annika W., Gephard, Stephen, Post, David M.·2010·Canadian Journal of Fisheries and Aquatic Sciences

Abstract

Anadromous alewives ( Alosa pseudoharengus ) have the potential to alter the nutrient budgets of coastal lakes as they migrate into freshwater as adults and to sea as juveniles. Alewife runs are generally a source of nutrients to the freshwater lakes in which they spawn, but juveniles may export more nutrients than adults import in newly restored populations. A healthy run of alewives in Connecticut imports substantial quantities of phosphorus; mortality of alewives contributes 0.68 g P·fish–1, while surviving fish add 0.18 g P, 67% of which is excretion. Currently, alewives contribute 23% of the annual phosphorus load to Bride Lake, but this input was much greater historically, with larger runs of bigger fish contributing 2.5 times more phosphorus in the 1960s. A mesocosm experiment in a nearby lake showed that juvenile alewife growth is strongly density dependent, but early survival may be too low for juvenile outmigration to balance adult inputs. In eutrophic systems where nutrients are a concern, managers can limit nutrient loading by capping adult returns at a level where juvenile populations would not be suppressed.

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Crossref · 10.1139/f10-059

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44 of 44 references verified0 citation errors · 0 not checkable

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  • The annual migrations of anadromous fishes and subsequent carcass inputs have been shown to be important in rivers, but equivalent examination of terrestrial migrations is lacking.

    “The more well-studied annual migrations of anadromous fishes and subsequent carcass inputs have been shown to be important in rivers (18,19), but equivalent examination of the influence of terrestrial migrations is lacking.”

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Authors
West, D. C., Walters, A. W., Gephard, S., & Post, D. M.
Affiliations
Yale University (US)
Venue
Canadian Journal of Fisheries and Aquatic Sciences
Published
2010-08
Volume
67
Issue
8
Pages
1211-1220
ISSN
  • 0706-652X (ISSN-L)
  • 1205-7533
OpenAlex
W2140626691
Cited by
72
References
44
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 8 · 2020: 18 · 2019: 1 · 2018: 8 · 2017: 7 · 2016: 3 · 2015: 6 · 2014: 1 · 2013: 4 · 2012: 3
FWCI
2.68
Type
journal article
Language
en
Open access
closed
Locations
Canadian Journal of Fisheries and Aquatic Sciences (publishedVersion)
Funders
U.S. Environmental Protection Agency
Topics
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
  • Physical Sciences › Environmental Science › Environmental Chemistry › Aquatic Ecosystems and Phytoplankton Dynamics
  • Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
Keywords
alewife, nutrient loading, phosphorus, coastal lakes, fish migration, fish mortality, fish excretion, eutrophication, lake restoration, density dependence, Connecticut

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