. Commercial fisheries review. Fisheries; Fish trade. MISC. INVERTEBRATES FISH BEAM TRAWL SHRIMP - 1,585 LgS. INVERTEBRATES - 136 ^^ FISH - 96 „ TOTAL 1 ,917. OTTER TRAWL SHRIMP - 1,747 LgS. INVERTEBRATES - 82 ,, FISH - 79 „ TOTAL 1 ,908 FIG. 1 CATCH COMPOSITION OF TWO TYPES OF SHRIMP NETS. The wings of the otter trawl were attached to the otter boards. Mud lines were not used. The lead line was attached 9-| inches above the bottom of each board. The lead line of the 10-foot beam was first attached at the base, just above the shoe, and later at a point 4 inches higher. For comparative gear tow
. Commercial fisheries review. Fisheries; Fish trade. MISC. INVERTEBRATES FISH BEAM TRAWL SHRIMP - 1,585 LgS. INVERTEBRATES - 136 ^^ FISH - 96 „ TOTAL 1 ,917. OTTER TRAWL SHRIMP - 1,747 LgS. INVERTEBRATES - 82 ,, FISH - 79 „ TOTAL 1 ,908 FIG. 1 CATCH COMPOSITION OF TWO TYPES OF SHRIMP NETS. The wings of the otter trawl were attached to the otter boards. Mud lines were not used. The lead line was attached 9-| inches above the bottom of each board. The lead line of the 10-foot beam was first attached at the base, just above the shoe, and later at a point 4 inches higher. For comparative gear tows only those data collected with the lead line 4 inches above the beam shoe were used. The duration of each tow was timed, the distance each net traveled being meas- ured in Loran microseconds. Three types of tows were made. Gear shake-down and modification tows were called trial tows. Search tows were shrimp-scouting and exploratory tows. Test- gear tows made on the same grounds during the same periods of time, and at the same depths were designateid comparison tows. Comparison tows were made in couplet sequence, i. e., beam trawl, then otter trawl, next otter trawl, and then beam. The catch of each tow was segregated by species. Weights were then taken of three general groups--shrimp, fish, and miscellaneous invertebrates. Surface-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service; U. S. Fish and Wildlife Service; United States. Bureau of Commericial Fisheries. [Washington] : National Marine Fisheries Service; [for sale by the Supt. of Docs. , U. S. Govt. Print. Off. ]
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Keywords: ., book, bookcentury1900, booksubjectfisheries, booksubjectfishtrade
