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Table 1. Common and scientific names of fishes collected for residue analysis in the National Pesticide Monitoring Program, 1976-79a. Family and scientific name Lepisosteidae Lepisosteus osseus L. spatula Amiidae Amia Galva Clupeidae Alosa chrysochloris Dorosoma cepedianum Hiodontidae Hiodon alosoides Salmonidae Coregonus clupeaformis C. hoyi Prosopium cylindraceum Salmo gairdneri S. trutta Salvelinus mal_ma S. namayeush Thymallus arcticus Esocidae Esox lucius E. niger Cyprinidae Acrocheilus alutaceus Carassius auratus Clinostomus elongatus Cyprinus carpio Orthodon microlepidotus Ptyocheilus oreganensis Catostomidae Carpiodes carpio Catostomus catostomus C. columbianus C. commersani C. latipinnis C. macrocheilus C. snyderi C. tahoensis Ictiobus bubalu_ s L cyprinellus Common name longnose gar alligator gar bowfin skipjack herring gizzard shad goldeye lake whitefish bloater round whitefish rainbow trout brown trout Dolly Varden lake trout Arctic grayling northern pike chain pickerel chiselmouth goldfish redside dace common carp Sacramento blackfish northern squawfish river carpsucker longnose sucker bridgelip sucker white sucker flannelmouth sucker largescale sucker Klamath largescale sucker Tahoe sucker smallmouth buffalo bigmouth buffalo Family and scientific name Minytrema melanops Moxostoma sp. Ictaluridae Ictalurus catus I. furcatus 1. melas 1. nebulosus L. punctatus Clariidae Clarias fuscus Gadidae Lota lota Poeciliidae Poecilia vittata Pereichthyidae Morone americana M. chrysops M. saxatilis Centrarchidae Ambloplites rupestris Lepomis cyanellus L. gibbosus L. gulosus L. macrochirus L. microlophus Micropterus dolomieui M. punctatus M. salmoides Pomoxis annularis P. nigromaculatus Percidae Perca flavescens Stizostedion canadense S. vitreum vitreum Sciaenidae Aplodinotus grunniens Cichlidae Tilapia mossambica Mugilidae Mugil cephalus Common name spotted sucker redhorse white catfish blue catfish black bullhead brown bullhead channel catfish Chinese catfish burbot Cuban limia white perch white bass striped bass rock bass green sunfish pumpkinseed warmouth bluegill redear sunfish smallmouth bass spotted bass largemouth bass white crappie black crappie yellow perch sauger walleye freshwater drum Mozambique tilapia striped mullet aFrom American Fisheries Society, Committee on Names of Fishes (1980), except for Poecilia vittata and Clarias fuscus. Laboratory Analyses Sample Preparation Each composite sample was prepared for extraction according to the following procedures: Individual frozen fish were cut into 2.5-em cubes with a band saw (Hobart, Model 5822) and then ground twice in a meat grinder (Hobart, Model 4822) until the sample appeared to be homogeneous. The ground tissue from all fish constituting a sample was collected in a polyethylene bag and mixed by hand until homogeneous. A 400-g portion was then placed in a 450-mL bottle and refrozen. For the 1978-79 samples, an additional 10-g portion was placed in a 114-mL jar and refrozen as a quality assurance measure. Extraction For the 1976 and 1977 samples, each 400-g sample was thawed and mixed and a 20-g subsample was weighed into a 225-mL glass jar. Powdered anhydrous Na2SO4 (80 g, pre-