Year-Class Formation in the Walleye (Stizostedion vitreum vitreum) Population of Oneida Lake, New York, 1966–73

1976 ◽  
Vol 33 (4) ◽  
pp. 783-792 ◽  
Author(s):  
J. L. Forney
Keyword(s):  
New York ◽  
Class Size ◽  
Class Formation ◽  
Stizostedion Vitreum ◽  
Oneida Lake ◽  
Pelagic Larvae ◽  
Second Year ◽  
Alternate Prey

Abundance of eight successive year-classes of walleyes (Stizostedion vitreum vitreum) was measured at intervals from hatching into the second year. Each year-class arose from an initial stock of 12–18 billion eggs. Population of pelagic larvae was augmented in some years by the release of hatchery-reared larvae but the effect on year-class size was obscured by mortality after young became demersal. Decrease in number of fingerlings was attributed to predation by older walleyes. Intensity of predation was influenced by abundance of alternate prey and duration of cannibalism by growth of young walleyes. Five year-classes that were monitored through age 4 contributed 12,000–478,000 walleyes to the adult stock.

Size and species selection of zooplankton by larval and juvenile walleye (Stizostedion vitreum vitreum) in Oneida Lake, New York

1992 ◽  
Vol 70 (10) ◽  
pp. 2059-2067 ◽  
Author(s):  
Donna M. Graham ◽  
W. Gary Sprules
Keyword(s):  
New York ◽  
Feeding Strategy ◽  
Stomach Contents ◽  
Species Selection ◽  
Feeding Strategies ◽  
Stizostedion Vitreum ◽  
Calanoid Copepods ◽  
Oneida Lake ◽  
Total Length ◽  
Young Of The Year

Young-of-the-year walleye (Stizostedion vitreum vitreum) ranging from 7 to 38 mm in total length were collected from Oneida Lake, New York, from 14 May to 11 June, 1989. Stomach contents were analyzed to document feeding strategies employed during their early life stages. A distinct change in both type and size of prey was evident as the walleye progressed through their first 4 weeks of life. The diet of 10- to 13-mm walleye consisted of 77.3% (by number) cyclopoid copepods; walleye 13–19 mm in total length consumed calanoid copepods (96.1%), while the diet of older juveniles, 29–38 mm in total length, consisted of mostly cladocerans (Daphnia spp.) (88.3%). The smallest size class of fish consumed zooplankton 0.50–1.50 mm long, the second class of fish consumed 1.25- to 2.00-mm zooplankton, and the third class consumed 1.5- to 2.00-mm zooplankton. Electivity calculations from both field and laboratory studies revealed that these changes were a result of active selection by the young walleye. The smallest walleye consumed zooplankton as large as their mouth gapes would allow. As the larvae increased in size they began to consume zooplankton of intermediate size (mouth gape approximately 2.0 mm) and remained consistent in their choice thereafter. We suggest that young-of-the-year walleye foraged in a manner that optimized growth. Both species and size of zooplankton were important components of their feeding strategy.

Evidence of Inter- and IntraSpecific Competition as Factors Regulating Walleye (Stizostedion vitreum vitreum) Biomass in Oneida Lake, New York

1977 ◽  
Vol 34 (10) ◽  
pp. 1812-1820 ◽  
Author(s):  
John L. Forney
Keyword(s):  
New York ◽  
Intraspecific Competition ◽  
Yellow Perch ◽  
Stizostedion Vitreum ◽  
Predator Population ◽  
American Eel ◽  
Oneida Lake ◽  
Sequence Of Events ◽  
Mean Size ◽  
Change In Mean

The sequence of events that led to a decline in numbers of American eel (Anguilla rostrata) and esocids and an increase in numbers of walleye (Stizostedion vitreum vitreum) in Oneida Lake from 1900–74 are reviewed. Demise of eel and esocids was followed by a rise in numbers of walleye, but little change in mean size of individual walleye. Reduced interspecific competition apparently enhanced walleye recruitment, but the anticipated increase in growth of walleye was probably inhibited by intensified intraspecific competition. This interpretation was supported by evidence that recruitment and growth of walleye in 1957–74 were regulated by prey abundance. Transition from a diverse predator population to one dominated by walleye was orderly and yellow perch (Perca flavescens) remained the most abundant prey. Key words: Percidae, competition, walleye biomass, Stizostedion, population dynamics, community ecology

Individual-based model simulations of a zebra mussel (Dreissena polymorpha) induced energy shunt on walleye(Stizostedion vitreum) and yellow perch (Perca flavescens) populations in Oneida Lake, New York

1999 ◽  
Vol 56 (11) ◽  
pp. 2148-2160 ◽  
Author(s):  
Edward S Rutherford ◽  
Kenneth A Rose ◽  
Edward L Mills ◽  
John L Forney ◽  
Christine M Mayer ◽  
...  
Keyword(s):  
New York ◽  
Zebra Mussel ◽  
Dreissena Polymorpha ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Forage Fish ◽  
Stizostedion Vitreum ◽  
Individual Based Model ◽  
Oneida Lake ◽  
Model Predictions

Zebra mussels (Dreissena polymorpha) recently invaded North American aquatic ecosystems and are hypothesized to impact lakes by increasing water clarity through filtration and shunting energy from pelagic to benthic pathways (ES effect). We used an individual-based model of Oneida Lake, New York, walleye (Stizostedion vitreum) and yellow perch (Perca flavescens) populations to simulate ES effects on percids by lowering zooplankton density and production rates and increasing benthos rates. We performed 50-year simulations involving both zooplankton and benthos changes together and each change alone. We also performed simulations to determine robustness of model predictions under different assumed levels of zooplankton and benthos, increased forage fish and mayflies, and walleye stocking. Predicted ES effects were elimination of walleye high-recruitment years, resulting in a 30% reduction in adult walleye abundance. Yellow perch adult abundance increased by 6% due to reduced walleye predation. Neither component (zooplankton or benthos) of ES generated the same total response for yellow perch as both components together. Simulated walleye stocking and increased forage fish density had little effect on model predictions. Increased mayfly densities offset predicted ES effects by buffering predation on juvenile percids. Model predictions of ES impacts on percids generally were consistent with observed changes in Oneida Lake since zebra mussel arrived.

SEASONAL PREVALENCE OF SKIN TUMORS FROM WALLEYE (STIZOSTEDION VITREUM) FROM ONEIDA LAKE, NEW YORK

1988 ◽  
Vol 24 (2) ◽  
pp. 292-298 ◽  
Author(s):  
Paul R. Bowser ◽  
Marilyn J. Wolfe ◽  
John L. Forney ◽  
Gregory A. Wooster
Keyword(s):  
New York ◽  
Skin Tumors ◽  
Stizostedion Vitreum ◽  
Seasonal Prevalence ◽  
Oneida Lake

On white marble half-lotus meditation statues carved in Wuding Era of the Eastern Wei Dynasty

2019 ◽  
Vol 19 (1) ◽  
pp. 182-194
Author(s):  
Hyun-Sook So
Keyword(s):  
New York ◽  
Comparative Study ◽  
Metropolitan Museum ◽  
White Marble ◽  
City Area ◽  
Metropolitan Museum Of Art ◽  
Right Hand ◽  
Second Year ◽  
Made In ◽  
Wei Dynasty

Abstract In 2012, large amounts of white marble Buddhist statues of the Eastern Wei and Northern Qi Dynasties were unearthed from the Buddhist sculpture hoard at Bei Wuzhuang in Ye City Site. This paper makes a comparative study on a bodhisattva statue in meditation seated in half-lotus posture (resting right ankle on the knee of pendent left leg and holding right hand upward) among them and another sculpture of the same type and made in the same period unearthed at the Xiude Monastery site in Dingzhou; from the double-tree, stupa and coiling dragon designs shown by them, this paper explores the commonalities and differences of the Buddhist arts in these two areas. Moreover, this paper reveals that this motif emerged earlier in the Ye City area than in the Dingzhou area, and diffused to the latter after it became popular in the Ye City area. By these conclusions, this paper infers that the white marble meditating statue seated in half-lotus position with the date of the second year of Wuding Era (544 CE) in the collection of the Metropolitan Museum of Art in New York, USA was produced in Ye City area.

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