Equivalent Adult Estimates for Losses of Fish Eggs, Larvae, and Juveniles at Seabrook Station with Use of Fuzzy Logic to Represent Parametric Uncertainty

Saila, Saul B.; Lorda, Ernesto; Miller, JD; Sher, Ronald A.; Howell, W. Huntting

doi:10.1577/1548-8675(1997)017<0811:eaeflo>2.3.co;2

Cited by 7 publications

(4 citation statements)

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“…Like many groundfish species off the northeastern coast of North America, catches have declined over the past 30 yrs (NEFSC ). A winter flounder female is capable of releasing hundreds of thousands of eggs annually, but because of the vulnerability of the small, early life stages (fertilized eggs, larvae, and newly settled juveniles), there is high natural mortality, and few fish survive to maturity (Saila et al ). Captively spawning adults and then rearing and releasing juveniles at a size or age beyond this mortality window (a period lasting several months characterized by high predator‐induced mortality; Taylor and Collie ) may enhance natural stocks.…”

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confidence: 99%

The Effects of Live and Artificial Diets on Feeding Performance of Winter Flounder, Pseudopleuronectes americanus, in the Hatchery

Walsh

Fairchild

Rennels

et al. 2015

J World Aquaculture Soc

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Winter flounder, Pseudopleuronectes americanus, are capable of releasing hundreds of thousands of eggs annually, but because of the vulnerability of the small, early life stages, there is high natural mortality, and few survive to maturity. Captively spawning, rearing, and releasing animals at a size or age beyond this period of high mortality may enhance stocks. The objectives of this research were to determine how different diets (both live and formulated) influenced hatchery survival and growth of juvenile winter flounder. Live feeds included post-nauplii of brine shrimp, Artemia salina; white worms, Enchytraeus albidus; and common burrower amphipods, Leptocheirus plumulosus. Fish reared on live feeds exhibited significantly higher survival (P < 0.0001) and growth (P < 0.01) than those reared on formulated feed, with fish fed white worms exhibiting the highest growth rates. This study provides hatchery feeding strategies that may ease the transition of flatfish released into the wild for stock enhancement.

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confidence: 99%

The Effects of Live and Artificial Diets on Feeding Performance of Winter Flounder, Pseudopleuronectes americanus, in the Hatchery

Walsh

Fairchild

Rennels

et al. 2015

J World Aquaculture Soc

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“…Despite higher than predicted rates of larval fish entrainment, major population‐level effects on large fish populations are unlikely from this level of entrainment due to high natural mortality of larval fish and embryos (Fuiman & Werner, 2002). Estimates of foregone recruitment in other systems (EPRI, 2004; Jensen, 1990; Saila et al, 1997; White et al, 2010) have found that larval fish entrainment typically does not have a substantial impact (i.e., relative to other mortality factors) on the population dynamics of long‐lived fishes (Barnthouse, 2013). Nevertheless, the majority of Colorado Pikeminnow and Razorback Sucker larvae currently occur downstream of the Hogback Diversion Canal, so entrainment of these upstream‐most larvae is likely a minimal cause of larval fish mortality within the San Juan River basin, at least until a large population of spawning fish is established upstream of the Hogback Diversion Canal.…”

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confidence: 99%

Assessing entrainment of larval fish in the Hogback Diversion Canal, San Juan River

Clark Barkalow,

Dudley,

Platania

et al. 2024

River Research & Apps

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Water diversions worldwide may entrain or impinge fish and have population‐level impacts, but barriers like fish screens can reduce such threats. Traditional barriers are ineffective in the San Juan River, USA, due to high sediment and debris loads, so the Hogback Diversion Canal, NM, employs a novel weir wall design to reduce entrainment of sub‐adult and adult fishes. We evaluated the effectiveness of the weir wall in reducing the entrainment of larval fish using a combination of experimental and overnight trials. Larval fish densities were compared between the irrigation canal that delivers water to irrigators and subsequently entrains fish and the bypass canal that conveys water and fish back to the river. The density of hatchery‐produced larval fish collected in the irrigation canal during the experimental trial (0.74 fish/m3) was 52% of their density in the bypass canal (1.43 fish/m3), suggesting entrainment reduction. The density of wild‐produced larvae during overnight trials indicated some minor, mostly nonsignificant, differences between catch rates in irrigation and bypass canals, ontogenetic phases, and sampling dates. Though entrainment rates of wild‐produced larvae were not significantly reduced, density differences among postflexion mesolarvae and metalarvae suggest possible entrainment reduction of more developed ontogenetic phases. More intensive research is necessary to better elucidate the efficacy of the novel weir wall for reducing the entrainment of larval fish. However, our larval fish results and the results from prior large‐bodied entrainment studies suggest the novel weir wall may reduce fish entrainment in water diversions and benefit fluvial ecosystems in which traditional screens are unfeasible.

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“…Uncertainty in these model inputs can be addressed through sensitivity analysis, Monte Carlo simulations, or fuzzy arithmetic [20]. In addition, I think it would be valuable for the electric utility industry and the regulatory agencies to work together to develop a mutually acceptable range for each input parameter for various categories of species.…”

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confidence: 99%

Use of Equivalent Loss Models Under Section 316(b) of the Clean Water Act

Dey¹

2002

The Scientific World JOURNAL

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Equivalent loss models encompass a variety of life table-based approaches that can be used to convert age-and life stage-specific estimates of entrainment and impingement loss to a common, easily understood currency. This common currency can be expressed in terms of numbers of individuals, yield to the fishery, or biomass to the ecosystem. These models have at least two key uses in the Section 316(b) assessment process: screening for adverse environmental impact (AEI) and determination of environmental benefits associated with intake alternatives. This paper reviews the various forms of equivalent loss models, their data input requirements, and their assumptions and limitations. In addition, it describes how these models can be used as a second-level screening tool as part of the assessment of the potential for AEI. Given their relative simplicity and ease of use, equivalent loss models should prove to be an important tool in the arsenal of impact assessment methods for Section 316(b).

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Equivalent Adult Estimates for Losses of Fish Eggs, Larvae, and Juveniles at Seabrook Station with Use of Fuzzy Logic to Represent Parametric Uncertainty

Cited by 7 publications

References 0 publications

The Effects of Live and Artificial Diets on Feeding Performance of Winter Flounder, Pseudopleuronectes americanus, in the Hatchery

The Effects of Live and Artificial Diets on Feeding Performance of Winter Flounder, Pseudopleuronectes americanus, in the Hatchery

Assessing entrainment of larval fish in the Hogback Diversion Canal, San Juan River

Use of Equivalent Loss Models Under Section 316(b) of the Clean Water Act

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