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Effects of Alkyl Benzene Sulfonate on Rainbow Trout
Toxicity of detergent levels to rainbow trout was determined by probit analysis. Effects on gill tissues and blood were noted and measured. Destruction of gill tissues were severe. The respiratory surface was greatly reduced by lysis and clumping of lamellae. Edema in the epithelial cells of the lamellae and thrombi in the capillaries was evident.
Handbook of Procedures for Pesticide Residue Analysis
This handbook is intended as a general list of procedures and subprocedures used by the Fish Pesticide Research Laboratory in the processing of fish and other aquatic samples for pesticide residue analysis.
Taxonomic Status and Reproduction of Striped Bass (Morone Saxatilis) in Florida
Striped bass from the Apalachicola and St. Johns Rivers in Florida were compared taxonomically with striped bass from other drainages on the Atlantic coast and Gulf of Mexico. Both rivers contain endemic striped bass populations. The Apalachicola River population was found to be a separate race. Sexually mature striped bass from the St. Johns were induced to spawn using hormonal injections. Few fry were produced due to extreme temperature fluctuations. Reproduction requirements and factors limiting the abundance of striped bass in Florida are discussed.
Changes in the Fish Population in Lake Francis Case in South Dakota in the First 16 Years of Impoundment
The total number of adult fish in Lake Frances Case, a main steam Missouri River Reservoir, has declined since impoundment in 1952. Goldeye, channel catfish, and northern redhorse have probably remained the same; emerald shiner, white bass, walleye, and possibly flathead catfish have increased. The sauger population began to decline at about the time walleye numbers increased. Some species formerly present have become rare. Forage species in the reservoir were gizzard shad, emerald shiner, and yellow perch, but these were not present in large enough numbers to provide an abundant forage fish population.
