Shrimp; report on investigation no. 332-40 under section 332 of the Tariff act of 1930, pursuant to a resolution of the Committee on Finance of the United States Senate, adopted in August 1960.

Mode of access: Internet.

Shrimp; report on investigation no. 332-38 under section 332 of the Tariff act of 1930, pursuant to a resolution of the Committee on Ways and Means of the United States House of Representatives, adopted February 9, 1960.

Mode of access: Internet.

Synopses of research on shrimps: 1. The common shrimp species of Sierra Leone's coastal waters: their distribution, abundance and size composition

The authors present quantitative information on the shrimp resources of Sierra Leone waters. Four of the nine species present have been studied, of which Paenaeus duorarum notialis is dominant in the fishery. Synoptic surveys were undertaken in June 1977, and March 1978, to determine the abundance of the shrimp stock on the inshore shelf. The temperature-salinity-depth curves for the fishing ground show the existence of three water masses. The majority of fish caught were sciaenids, with some sparids also being taken. Detailed discussion of distribution and abundance of individual species of shrimp is given. The surveys have shown that the Banana Islands are the most productive shrimp grounds in the country, and the authors believe that they can support a viable shrimp industry for several years to come at present rates of exploitation

Seasonal foods, gonadal maturation, and length-weight relationships for nine fishes commonly captured by shrimp trawl on the Northwest Gulf of Mexico Continental Shelf

Recent emphasis on ecosystem approaches to fisheries management renews interest in, and the need for, trophic information about fish communities. A program was started in 1980 at the National Marine Fisheries Service Galveston Laboratory to develop a trophic database for continental shelf fishes. Collections were made during 1982-1983 that were processed but never published, yet the data remain valid today for historical purposes and for delimiting food web components within ecosystem assessments. I examined spring, summer, and fall foods in offshore populations of nine common species of trawl-susceptible fishes, with particular reference to predation on commercial penaeid shrimps (Farfantepenaeus and Litopenaeus). Diets were evaluated with the Index of Relative Importance (IRI) which combines the occurrence, number, and weight of each food item. Bank sea bass (Centropristis ocyurus) and bighead searobin (Prionotus tribulus) primarily consumed crabs, more so by larger than smaller fish. Inshore lizardfish (Synodus foetens) was almost entirely piscivorous. Ocellated flounder (Ancylopsetta ommata) consumed fishes, crabs, and stomatopods. Dwarf sand perch (Diplectrum bivittatum), blackwing searobin (Prionotus rubio), rock sea bass (Centropristis philadelphica), southern kingfish (Menticirrhus americanus), and red snapper (Lutjanus campechanus) fed mainly on shrimps. Most fish diets varied with respect to size (age), time of day, area sampled, depth, or season. Rimapenaeus and Sicyonia were the most frequently identified shrimp genera - only five Farfantepenaeus and no Litopenaeus were identified in almost 4,300 fish stomachs. I also examined gonadal development and documented fish length-weight relationships. Ripe gonads were most frequently found during summer in dwarf sand perch, during fall in ocellated flounder and bighead searobin, and during spring for other species, except no ripe red snapper or bank sea bass were collected. Rock sea bass was found to be a protogynous hermaphrodite, while dwarf sand perch is a synchronous hermaphrodite. Only ocellated flounder and southern kingfish exhibited sex-related differences in length-weight relationships. (PDF contains 40 pages.)

Development of an electric shrimp trawl 1. Reaction of shrimps to low volt direct current

Preliminary attempts were made to assess the effect of direct current on shrimps and to see whether the shrimp could be guided in large numbers into the fishing net by using a current of appropriate voltage without scattering them away as it happens at present. This communication is the first in the series of studies and primarily deals with laboratory equipment and experimental procedures followed.

Memorial of the inhabitants of Fairfield District, S. Carolina, praying a revision of the tariff, &c., December 14, 1827

This document contains a memorial, which was written by the citizens of Fairfield district of South Carolina, with a purpose of securing their constitutional right of expressing formal sentiments in regard to excluding tariff on woolen manufactures. It was presented to the president and members of the Senate, and to the speaker and members of the House of Representatives in Congress.

Cantaloups; report on escape-clause investigation no. 7-98, under the provisions of section 7 of the Trade agreements extension act of 1951, as amended.

Mode of access: Internet.