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Dewey L. Tackett

Publications and source records attributed to Dewey L. Tackett.

10 recordsLinked to original sources

Daily variation in feed consumption by channel catfish

Daily feed consumption by 0.09‐lb channel catfish ( Ictalurus punctatus ) stocked at 50 and 75 lb offish per 0.25‐acre pond, and by 0.57‐lb channel catfish stocked at 100 and 200 lb offish per 0.25‐acre pond, was measured for 157 d. Demand feeders were used to determine feed consumption. Feed consumption routinely varied, on successive days, an average of 61 and 31%, for the 0.57‐lb fish stocked at the higher and lower rates, respectively, and 58% for both stocking densities of the 0.09‐lb fish.

Progressive Fish-Culturist

Discharge of solids from fish ponds

Water samples were collected from effluents of fish ponds and analyzed for settleable, nonsettleable, and suspended solids . Fish biomass in ponds was not consistently associated with amounts of settleable or nonsettleable solids , but was correlated with amounts of suspended solids . The amount of solids discharged was relatively small, suggesting little or no pollution of receiving waters.

Progressive Fish-Culturist

A respirometer with controllable oxygen levels

Construction details and operation of a respirometer with capabilities for controlling the oxygen level at preselected levels is described. The interaction of an oxygen sensor and electronic switch energizes an electrolysis cell which replenishes oxygen used by a test organism. Respiration rate of any aquatic or semiaquatic organism may be determined by this apparatus.

Transactions of the American Fisheries Society