Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints
2014 Spring. Includes bibliographical references. The 20th century was a period of rapid reservoir construction in the western United States. Initially, many of these reservoirs hosted productive recreational fisheries for introduced salmonids, but then waned from oligotrophication, dam operations,...
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ftcolostateunidc:oai:mountainscholar.org:10217/82628 2023-06-11T04:08:15+02:00 Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints Olsen, Devin M. Johnson, Brett Boone, Randall Myrick, Christopher Lepak, Jesse 2007-01-03T06:43:00Z born digital masters theses application/pdf http://hdl.handle.net/10217/82628 English eng eng Colorado State University. Libraries 2000-2019 - CSU Theses and Dissertations Olsen_colostate_0053N_12295.pdf http://hdl.handle.net/10217/82628 Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. Arctic Char bioenergetics modeling consumptive demand fish stocking mysis strontium microchemistry Text 2007 ftcolostateunidc 2023-05-04T17:39:32Z 2014 Spring. Includes bibliographical references. The 20th century was a period of rapid reservoir construction in the western United States. Initially, many of these reservoirs hosted productive recreational fisheries for introduced salmonids, but then waned from oligotrophication, dam operations, and the effects of introduced opossum shrimp Mysis diluviana. Managers have sought alternative fish species that could withstand these trophic constraints. In 1990 the state of Colorado introduced Arctic Char Salvelinus alpinus into Dillon Reservoir hoping they would prey on Mysis and produce a valuable "boutique fishery". My study investigated the outcomes of this introduction. I found that the introduction resulted in a reproducing population, creating one of the only public fisheries for Arctic Char in the lower 48 states of the USA, and the southernmost population in the world. Arctic Char diet was composed primarily of Mysis shrimp, and their growth was among the fastest of lacustrine populations worldwide. While bioenergetics simulations showed that approximately 3-6 times as many Arctic Char would need to be stocked annually to effectively control Mysis shrimp, Arctic Char did channel energy formerly sequestered in Mysis into desirable recreational fish biomass. Despite this desirable ecosystem service, the stocking program is paradoxical. In an era when nonnative species comprise a primary threat to aquatic biodiversity, condoning new introductions is concerning. However, in many human-dominated environments such as reservoirs, exotic fishes already comprise the majority of species. Fishery managers are left with the problem of choosing relatively innocuous strategies that can still provide recreational benefits in systems plagued by a variety of anthropogenic stressors. Text Arctic Salvelinus alpinus Digital Collections of Colorado (Colorado State University) Arctic Dillon ENVELOPE(-108.935,-108.935,55.933,55.933) |
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Open Polar |
collection |
Digital Collections of Colorado (Colorado State University) |
op_collection_id |
ftcolostateunidc |
language |
English |
topic |
Arctic Char bioenergetics modeling consumptive demand fish stocking mysis strontium microchemistry |
spellingShingle |
Arctic Char bioenergetics modeling consumptive demand fish stocking mysis strontium microchemistry Olsen, Devin M. Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
topic_facet |
Arctic Char bioenergetics modeling consumptive demand fish stocking mysis strontium microchemistry |
description |
2014 Spring. Includes bibliographical references. The 20th century was a period of rapid reservoir construction in the western United States. Initially, many of these reservoirs hosted productive recreational fisheries for introduced salmonids, but then waned from oligotrophication, dam operations, and the effects of introduced opossum shrimp Mysis diluviana. Managers have sought alternative fish species that could withstand these trophic constraints. In 1990 the state of Colorado introduced Arctic Char Salvelinus alpinus into Dillon Reservoir hoping they would prey on Mysis and produce a valuable "boutique fishery". My study investigated the outcomes of this introduction. I found that the introduction resulted in a reproducing population, creating one of the only public fisheries for Arctic Char in the lower 48 states of the USA, and the southernmost population in the world. Arctic Char diet was composed primarily of Mysis shrimp, and their growth was among the fastest of lacustrine populations worldwide. While bioenergetics simulations showed that approximately 3-6 times as many Arctic Char would need to be stocked annually to effectively control Mysis shrimp, Arctic Char did channel energy formerly sequestered in Mysis into desirable recreational fish biomass. Despite this desirable ecosystem service, the stocking program is paradoxical. In an era when nonnative species comprise a primary threat to aquatic biodiversity, condoning new introductions is concerning. However, in many human-dominated environments such as reservoirs, exotic fishes already comprise the majority of species. Fishery managers are left with the problem of choosing relatively innocuous strategies that can still provide recreational benefits in systems plagued by a variety of anthropogenic stressors. |
author2 |
Johnson, Brett Boone, Randall Myrick, Christopher Lepak, Jesse |
format |
Text |
author |
Olsen, Devin M. |
author_facet |
Olsen, Devin M. |
author_sort |
Olsen, Devin M. |
title |
Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
title_short |
Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
title_full |
Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
title_fullStr |
Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
title_full_unstemmed |
Arctic Char Salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
title_sort |
arctic char salvelinus alpinus can enhance fisheries in reservoirs with trophic constraints |
publisher |
Colorado State University. Libraries |
publishDate |
2007 |
url |
http://hdl.handle.net/10217/82628 |
long_lat |
ENVELOPE(-108.935,-108.935,55.933,55.933) |
geographic |
Arctic Dillon |
geographic_facet |
Arctic Dillon |
genre |
Arctic Salvelinus alpinus |
genre_facet |
Arctic Salvelinus alpinus |
op_relation |
2000-2019 - CSU Theses and Dissertations Olsen_colostate_0053N_12295.pdf http://hdl.handle.net/10217/82628 |
op_rights |
Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. |
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1768381419981111296 |