Fred P. Meyer

Review of the status of chemicals used in fisheries indicates that many lack proper registrations. Regulations of the U.S. Environmental Protection Agency and U.S. Food and Drug Administration require that all existing registrations be reviewed and reregistered by October 1977. Adequate data to support reregistration are lacking for some of the most widely used chemicals. Applications of unregistered compounds are strictly prohibited under penalty oflaw. Cancellation of existing registrations. high costs of research, high manpower requirements, and the long time required to complete...

Fish farming in Arkansas continues to be a major industry with 1972 returns exceeding $21 million. This indicates an overall increase in value of23.5 percent since 1969. Acreage of intensively-farmed waters increased 15.7 percent since 1969. Data collected during this survey indicates that a peak in the industry was reached between 1969 and 1972 and that during the past year acreages devoted to fish production declined slightly. Personal interviews of fish farmers provided the most useful data in determining the total production. Acreage, production and dollar values are presented in...

Economic returns from the commercial production of fish in Arkansas during 1969 were approximately double those of 1966. Acreages devoted to the culture of golden shiners and channel catfish in Arkansas showed major increases. The cash return from shiners was up 60 percent, and that from catfish increased almost fourfold. The overall return to Arkansas from all fish culture exceeded $17 million, whereas the nationwide return from baitfishes and catfish alone was nearly $35 million. Data collected from Arkansas fish farmers was analyzed with the aid of automatic data processing and are...

Dylox® was effective against some fish parasites, ineffective against others. Although experimental results were inconsistent, a few workers report success in treating trichodinid protozoans. No success resulted from treating catfish with Ichthyophthirius. Applications of 0.25 ppm (active ingredient! successfully controlled monogenetic trematodes of Gyrodactylus, Dactylogyrus, and Cleidodiscus spp. Parasitic copepods were effectively controlled by weekly applications of 0.25 ppm except during periods of hot weather. Five species of leeches proved susceptible to single applications of 0.5...

Commercial fish farming is the fastest growing industry in the field of agriculture in Arkansas. Due to its fast growth, allied industries have not kept pace. Part of the difficulty has been the lack of knowledge in the right places as this industry has developed. To collect statistics on this ballooning industry, a meeting between interested agencies was held at Stuttgart, Arkansas. At this meeting a questionnaire was developed with the idea of programming the information for IBM storage. The results of the questionnaire are discussed in the paper, the information received was...

Single applioations of 0.25 ppm Dylox effectively controlled the tadpole shrimp, Apus longicaudatus, and the fairy shrimp, Streptocephalus texanus, in hatchery ponds without adverse effects on bass or channel catfish fry. Bass survival in treated ponds was boosted from 20 to 80 per cent by the Dylox treatment. Plankton populations in the treated ponds appeared unaffected.

Emulsifiable oil preparations of benzene hexachloride were found to be 25 times more toxic to golden shiners than wettable powder formulations containing the same level of gamma isomer. Tests of the individual components of the oil preparation other than the pesticide indicated that none of these was toxic to fish at the levels normally applied. The addition of a hydrocarbon solvent to a formulation increased the toxicity many times. No difference was noted in the toxicity of the active ingredient used in the various formulations. Lethal dosages for copepods were not affected by...