Phosphorus reduction by dilution and shift in fish species in Moses Lake, WA

Welch, Eugene B.

doi:10.1080/07438140903083906

Cited by 14 publications

(6 citation statements)

References 27 publications

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“…A significant challenge to lake and reservoir management is to identify and apply techniques that can reduce, eliminate, or at least postpone nuisance blooms of cyanobacteria until after the peak period of summer recreation. One strategy has been to reduce allochthonous loads of phosphorus (P) to limit biomass development (Welch 2009). Unfortunately, many lakes experience high rates of internal loading of P during seasonal thermal stratification (Nürnberg 2009), and others are eutrophic for geological reasons.…”

mentioning

confidence: 99%

Dynamics ofAphanizomenonandMicrocystis(cyanobacteria) during experimental manipulation of an urban impoundment

McDonald

Lehman

2013

Lake and Reservoir Management

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mentioning

confidence: 99%

Dynamics ofAphanizomenonandMicrocystis(cyanobacteria) during experimental manipulation of an urban impoundment

McDonald

Lehman

2013

Lake and Reservoir Management

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“…The range of values studied was important in determining results. For example, phosphorus was positively associated with Walleye catch rates within and across lakes in Ontario (Robillard and Fox 2006) but negatively associated with Walleye catch rates at extremely hypereutrophic levels in Lake Moses, Washington (Welch 2009). Similarly, in Ontario lakes, DOC exhibited a nonlinear relationship with Walleye production, with production peaking at intermediate levels (Jarvis et al 2020).…”

Section: Resultsmentioning

confidence: 99%

It’s Complicated and It Depends: A Review of the Effects of Ecosystem Changes on Walleye and Yellow Perch Populations in North America

Hansen

Ruzich

Krabbenhoft

et al. 2022

N American J Fish Manag

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Walleye Sander vitreus and Yellow Perch Perca flavescens are culturally, economically, and ecologically significant fish species in North America that are affected by drivers of global change. Here, we review and synthesize the published literature documenting the effects of ecosystem changes on Walleye and Yellow Perch. We focus on four drivers: climate (including temperature and precipitation), aquatic invasive species, land use and nutrient loading, and water clarity. We identified 1,232 tests from 370 papers, split evenly between Walleye (n = 613) and Yellow Perch (n = 619). Climate was the most frequently studied driver (n = 572), and growth or condition was the most frequently studied response (n = 297). The most commonly reported relationship was "no effect" (42% of analyses), usually because multiple variables were tested and only a few were found to be significant. Overall responses varied among studies for most species-response-driver combinations. For example, the influence of invasive species on growth of both Walleye and Yellow Perch was approximately equally likely to be positive, negative, or have no effect. Even when results were variable, important patterns emerged; for example, growth responses of both species to temperature were variable, but very few negative responses were observed. A few relationships were relatively consistent across studies. Invasive species were negatively associated with Walleye recruitment and abundance, and higher water clarity was negatively associated with Walleye abundance, biomass, and production. Some variability in responses may be due to differences in methodology or the range of variables studied; others represent true context dependence, where the effect of a driver depends on the influence of other variables. Using common metrics of impact, publishing negative results, and robust analytical approaches could facilitate comparisons among systems and provide a more comprehensive understanding of the responses of Walleye and Yellow Perch to ecosystem change.

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“…Total P yang terlepas ke perairan dari budidaya dalam KJA di Waduk Pondok yaitu rata-rata 15,04 kg P/ton ikan, artinya dalam satu ton ikan yang dibudidayakan akan melepaskan fosfor ke perairan sebesar 15,04 kg P. Besarnya total P yang terlepas ke perairan sangat dipengaruhi oleh kandungan fosfor (P) di dalam pakan dan konversi pakan (Welch, 2009., David et al, 2013. Kandungan total P dalam pakan cukup tinggi yaitu nilai rata rata 1,53 %.…”

Section: Perhitungan Total P Yang Lolos Ke Perairan (Tlp)unclassified

Pendugaan Daya Dukung Perairan Untuk Budidaya Ikan Dalam Keramba Jaring Apung Di Waduk Pondok, Ngawi Jawa Timur

Aida

Utomo²

2019

BAWAL Widya Riset Perikanan Tangkap

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Waduk Pondok seluas 407 Ha berada di Ngawi Jawa Timur, beroperasi sejak 1995 dan merupakan waduk serbaguna. Kegiatan budidaya ikan dengan keramba jaring apung (KJA) di Waduk tersebut sudah berkembang, hingga mencapai 126 petak pada tahun 2016. Penelitian ini bertujuan untuk menganalisis tingkat kesuburan perairan, total fosfor yang terlepas dari KJA ke peraian dan mengestimasi daya dukung perairan untuk KJA. Tingkat kesuburan perairan dianalisa dengan nilai index status trofik (TSI). Estimasi daya dukung perairan untuk KJA menggunakan pendekatan model keseimbangan total fosfor (P) yang terlepas ke parairan. Hasil penelitian menunjukkan bahwa perairan waduk Pondok sudah termasuk dalam katagori perairan eutrofik dengan nilai TSI 62,1.Total P yang terlepas ke perairan sebesar 15,04 kg ton ikan. Daya dukung perairan untuk KJA adalah 195,2 ton /tahun (130 petak KJA). Jumlah KJA di Waduk Pondok ada 126 petak (189 ton) atau sudah mendekati daya dukung perairan, sehingga jumlahnya tidak dapat ditambah lagi.Pondok Reservoir as large as 407 hectares is located in Ngawi, East Java. The Reservoir was functionally started in 1995, is a multipurpose reservoir. Fish culture in Pondok Reservoir in 2016 reached 126 cages. The aim of this research is to evaluate the trophic status, the total of phosphorus released into the waters from floating net cage, and carrying capacity of the reservoir for fish culture. Trophic status of reservoir was analyzed trough calculating the TSI (Trophic Status Index). A phosphorus mass balance model was used in assessing the carrying capacity of the reservoir. Research hypotesis in this research is Pondok reservoir has reached eutrophic status, and cages number in Pondok reservoir has alreday exceeds carriying capacity. Pondok reservoir have been categorized as eutrophic status, with the value of TSI 62.1. Total P released to the waters is 15.04 kg P / ton of fish. The carrying capacity of Pondok Reservoir for fish culture is 195,2 ton / year (130 cages). The number fish culture in Pondok Reservoir is 126 cages (189 ton), has already approaching maximum number can not be added anymore.

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Phosphorus reduction by dilution and shift in fish species in Moses Lake, WA

Cited by 14 publications

References 27 publications

Dynamics ofAphanizomenonandMicrocystis(cyanobacteria) during experimental manipulation of an urban impoundment

Dynamics ofAphanizomenonandMicrocystis(cyanobacteria) during experimental manipulation of an urban impoundment

It’s Complicated and It Depends: A Review of the Effects of Ecosystem Changes on Walleye and Yellow Perch Populations in North America

Pendugaan Daya Dukung Perairan Untuk Budidaya Ikan Dalam Keramba Jaring Apung Di Waduk Pondok, Ngawi Jawa Timur

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