The impacts of reduced water temperature on gizzard shad production in two Missouri River Reservoirs during a historic flood

2017 ◽  
Vol 24 (5) ◽  
pp. 420-425
Author(s):  
M. J. Greiner ◽  
M. J. Fincel ◽  
C. M. Longhenry
Keyword(s):  
Water Temperature ◽  
Missouri River ◽  
Gizzard Shad ◽  
Reduced Water ◽  
River Reservoirs

Balancing Fisheries Management and Water Uses for Impounded River Systems

2008 ◽  
Keyword(s):  
South Dakota ◽  
Adult Population ◽  
Age Groups ◽  
Missouri River ◽  
Gizzard Shad ◽  
Dorosoma Cepedianum ◽  
Bureau Of Reclamation ◽  
Abundance Estimates ◽  
Peak Abundance ◽  
River Reservoirs

<em>Abstract</em>.—Gizzard shad <em>Dorosoma cepedianum </em>is widely distributed in North America, and South Dakota marks the northwestern edge of its native range. To date, most research regarding population dynamics of gizzard shad has been conducted in more southerly waters. We reviewed the dynamics and biology of gizzard shad populations in South Dakota and compared this information with that reported for southerly populations. Once predicted to become extirpated in some South Dakota systems because of a lack of recruitment, gizzard shad populations today are naturally recruiting and have actually expanded their range, although adult population densities remain low. Recruitment of adult gizzard shad varied depending on the system. One population of gizzard shad introduced into a U.S. Bureau of Reclamation reservoir in western South Dakota exhibited erratic recruitment patterns, with only three age-groups recruited from 1993 to 2004. In contrast, adult gizzard shad samples collected in two Missouri River reservoirs indicated more consistent recruitment over an 8-year period. Peak abundance estimates of larval gizzard shad varied widely by system and by year. From 2004 to 2006, densities of gizzard shad in three western South Dakota reservoirs varied between 3 and 722 fish/100 m3. Densities of gizzard shad in Missouri River reservoirs in 2004 and 2005 varied between 6 and 24,640 fish/100 m3. Production of gizzard shad in South Dakota reservoirs may equal or exceed that of southern systems. When available as prey, age-0 gizzard shad are an important component of predator diets (30–100% by weight of all prey consumed by walleyes <em>Sander vitreus</em>). Introduction of gizzard shad resulted in increased growth rates for recreational fishes in western South Dakota. Currently, the presence of gizzard shad in South Dakota is considered to be a benefit to recreational fisheries in the state. However, further research should address the relationship between climate and reservoir operation on gizzard shad dynamics and the interactions between age-0 shad and age-0 <em>Micropterus</em>, <em>Perca</em>, and <em>Sander</em> spp.

Exploring a Temperature-Decreasing Shower Concept to Conserve Water and Energy

2021 ◽  
Author(s):  
N. Saniei ◽  
E. Shibata ◽  
S. Lui ◽  
J. Magcalas ◽  
B. McPhee ◽  
...  
Keyword(s):  
Water Temperature ◽  
Regulatory Focus ◽  
User Acceptance ◽  
Energy Usage ◽  
Resource Saving ◽  
Human Needs ◽  
Basic Human Needs ◽  
Willingness To Use ◽  
Study Participants ◽  
Reduced Water

Abstract Climate change is threatening the availability, quality and quantity of water for basic human needs. In much of North America, showering is an activity that consumes significant water, as well as energy to heat the water. This study investigates the feasibility of an intervention that gradually decreases shower-water temperature to encourage shorter shower times, towards reduced water and energy usage. The two parts of this work were performed over two academic years. The first part explored user acceptance in 23 study participants who underwent a shower while manually decreasing their own water temperature, as prescribed by a protocol. Immediately following the temperature-decreasing shower, participants were asked questions to assess their attitudes and willingness to use or install such a shower concept. Participants also completed questionnaires determining their regulatory focus and environmental attitudes, the effects of which on their attitudes about the shower concept are discussed. Over 56% of participants were able to abide by the temperature-decreasing showering protocol. Out of 23 participants, only 3 found the temperature-decreasing shower experience to be negative, 12 were neutral, and the remaining 8 found the experience to be a positive one. Given this result, the second part of the work implemented a microcontroller-based system that automatically controls shower temperature, pressure, and duration. This system is described and simulations are used to project the resource-saving potential of the concept.

Otolith chemistry as a fisheries management tool after flooding: The case of Missouri River gizzard shad

2018 ◽  
Vol 34 (3) ◽  
pp. 270-278 ◽  
Author(s):  
W.J. Radigan ◽  
A.K. Carlson ◽  
M.J. Fincel ◽  
B.D.S. Graeb
Keyword(s):  
Fisheries Management ◽  
Missouri River ◽  
Management Tool ◽  
Gizzard Shad ◽  
Otolith Chemistry

scholarly journals Long-Term Data Suggest Potential Interactions of Introduced Walleye and Smallmouth Bass on Native Sauger in Four Missouri River Impoundments

2019 ◽  
Vol 10 (2) ◽  
pp. 602-618
Author(s):  
Mark J. Fincel ◽  
Nicholas B. Kludt ◽  
Hilary A. Meyer ◽  
Michael Weber ◽  
Christopher M. Longhenry
Keyword(s):  
Temporal Trends ◽  
Missouri River ◽  
Smallmouth Bass ◽  
Micropterus Dolomieu ◽  
Abundance Trends ◽  
Lewis And Clark ◽  
Potential Interactions ◽  
River Reservoirs ◽  
Term Data

Abstract Sauger Sander canadensis, Walleye Sander vitreus, and Smallmouth Bass Micropterus dolomieu, are important sportfish in the four main stem Missouri River reservoirs in South Dakota: Lakes Oahe, Sharpe, Francis Case, and Lewis and Clark. However, native Sauger populations, once assumed to be stable, may be in decline. To identify temporal trends and potential interspecific mechanisms affecting Sauger populations, we examined their long-term abundance trends in standard gillnet surveys and angler catch and harvest trends in long-term creel surveys. We also used a robust design occupancy model to examine changes in within-lake distribution of this species. There are concerns regarding the effects of Walleye and Smallmouth Bass on Sauger, so we also described the population trends of these potential competitors. Standard gillnet surveys indicated declining abundance of both Sauger and Walleye in Lakes Oahe and Sharpe. Sauger abundance has trended down in Lewis and Clark, but upward in Francis Case. Conversely, Walleye abundance trends declined in Francis Case and increased in Lewis and Clark. Occupancy (ψ̂) of Sauger declined in all four reservoirs, indicating a contracting distribution throughout the reservoirs. Walleye occupancy remained ∼1.0. Smallmouth Bass occupancy increased in the three reservoirs with sufficient data for analysis, excluding Lewis and Clark Lake. Smallmouth Bass exhibited steady increases in angler catch and harvest, as well as abundance in long-term gillnet surveys, suggesting expanding and increasing populations. Habitat alteration is hypothesized to be a major driver of the Sauger occupancy and abundance declines. However, Walleye and Smallmouth Bass interactions could also be contributing to observed declines of native Sauger.

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