Yellow Perch, Walleye, and Sauger: Aspects of Ecology, Management, and Culture
Yellow Perch, Walleye, and Sauger: Aspects of Ecology, Management, and Culture

Author: John Clay Bruner

Publisher: Springer Nature

Published: 2021-11-21

Total Pages: 332

ISBN-13: 3030806782

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Walleye, one of the most sought-after species of freshwater sport fishes in North America, has demonstrated appreciable declines in their numbers from their original populations since the beginning of the 20th century. Similarly, Yellow Perch, once the most commonly caught sport fish and an important commercial species in North America, have also shown declines. Compiling up-to-date information on the biology and management of Walleye, Sauger, and Yellow Perch, including research on systematics, genetics, physiology, ecology, movement, population dynamics, culture, recent case histories, and management practices, will be of interest to managers, researchers, and students who deal with these important species, particularly in light of habitat alterations, population shifts, and other biotic and abiotic factors related to a changing climate.

Culture Methods for Growth Enhancement and Off-Season Production of Yellow Perch Perca Flavescens
Culture Methods for Growth Enhancement and Off-Season Production of Yellow Perch Perca Flavescens

Author:

Publisher:

Published: 2004

Total Pages:

ISBN-13:

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The success of the yellow perch Perca flavescens aquaculture industry depends largely on increasing growth efficiency to reduce production costs, and increasing fingerling availability for year-round production. Two characteristics of yellow perch biology pose challenges toward these goals. 1) Yellow perch exhibit sexually dimorphic growth, detected concurrently as the fish enter puberty, with many slower-growing males that may never achieve market size. These growth differences between genders also promote a situation in which cannibalism can quickly deplete a perch population reared under intensive conditions. 2) Yellow perch spawn once a year in the spring, and most producers are limited to a production schedule centered on this event. Two sets of studies were conducted to evaluate culture methods for the inhibiting maturation for promotion of somatic growth, and evaluate the practice of 'cold-banking' for off-season fingerling availability. Four combinations of constant and natural photothermal regimes were used to impose environmental conditions on juvenile fish that inhibited maturation and promoted somatic growth. Immature perch were expected to demonstrate reduced dimorphic growth pattern and overall growth enhancement. Results indicate that a) constant temperature is the strongest promoter of overall growth regardless of photoperiod; b) constant photoperiod also promotes overall growth regardless of temperature; c) natural (decreasing) photoperiod initiates maturation in yellow perch regardless of temperature; d) natural temperature is required for late maturational processes; e) constant temperature and constant photoperiod together confer the best overall growth performance, fully inhibit maturation in both genders, and suppress a sexually dimorphic growth pattern up to 53g average weight. Two studies were conducted evaluating the growth of cold-banked fish and costs associated with commercial application of this culture technique. Perch banked at 10 C on.