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Standing Crops of Fish in Oregon Farm Ponds
Author(s) -
Isaac Gary W.,
Bond Carl E.
Publication year - 1963
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1963)92[25:scofio]2.0.co;2
Subject(s) - standing crop , micropterus , acre , fishery , bass (fish) , crop , spawn (biology) , fish <actinopterygii> , lepomis macrochirus , biology , geography , ecology , agronomy , biomass (ecology)
Standing crops of fish in representative Oregon farm ponds were estimated by marking and recapture or by draining and enumeration. Most of the ponds were in the Willamette Valley, but a few were in central and southern Oregon. The average standing crop of bluegills (Lepomis macrochirus) was about 130 pounds per acre, and was similar to standing crops reported by workers in other states. The average standing crop of largemouth bass (Micropterus salmoides) for 12 ponds was 104 pounds per acre. Central Oregon ponds appeared to support more pounds of bass per acre than western Oregon ponds. Rough‐skinned newts (Taricha granulosa granulosa) were present in large numbers in some Willamette Valley ponds, with standing crops up to 245 pounds per acre. This species is believed to be an important competitor for food in fish ponds.