. Commercial fisheries review. Fisheries; Fish trade. 30 surf clams in this section would not sustain a commercial fishery. Bottom Sediments Area II data were compared to see if any relation could be found between the bottom Table 2 - Catch Rate of Surf Clams by 1-Fathom Intervals for Different Sediments in Area II Water Depth Bottom Soil Types Unknown | Mud-Clay | Sand Gravel Fathoms . . (Average Number of Clams Per 1 ow) . . 0 9 _ - 0 10 4 1 14 5 11 2 3 5 3 12 10 4 9 24 13 15 5 11 17 14 8 13 8 24 15 13 6 10 34 16 5 9 16 19 17 2 13 14 30 18 1 18 10 57 19 1 6 17 28 20 3 14 12 19 21 1 3 4 16 22
. Commercial fisheries review. Fisheries; Fish trade. 30 surf clams in this section would not sustain a commercial fishery. Bottom Sediments Area II data were compared to see if any relation could be found between the bottom Table 2 - Catch Rate of Surf Clams by 1-Fathom Intervals for Different Sediments in Area II Water Depth Bottom Soil Types Unknown | Mud-Clay | Sand Gravel Fathoms . . (Average Number of Clams Per 1 ow) . . 0 9 _ - 0 10 4 1 14 5 11 2 3 5 3 12 10 4 9 24 13 15 5 11 17 14 8 13 8 24 15 13 6 10 34 16 5 9 16 19 17 2 13 14 30 18 1 18 10 57 19 1 6 17 28 20 3 14 12 19 21 1 3 4 16 22 0 1 8 0 23 2 1 1 0 24 0 1 0 1 sediments and the population of surf clams, A relation was found between the mean num- ber of clams c aught and the bottom type fished (fig. 4, table 2). The bottom in Area n was divided into four general classifica- tions: (1) sand, (2) gravel, (3) mud, clay or a mixture of both, and (4) unknown. The types of bottom arranged with the most pro- ductive listed first are: (1) gravel, (2) sand, (3) mud-clay, and (4) unknown. The mean catch from stations with gravel bottom was 2 times that from sand, 3 times that from mud and clay, and about 6 times that from unknown sediments (table 3). Table 3 - Mean Catch of Surf Clams Taken from Different Bottom Sediments in Area II Bottom Sediment Mean Catch of Clams Number 25 11 8 4 Sand Mud-clay 14 - 13 - -Surf Clans ⢠Ocean Qu^ogs. â 15 16 17 18 19 20 21 22 23 24 25 WATER DEPTH (fATHOMs) Fig. 5 - Depth distribution of surf clams and ocean quahogs in Area II,. 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.
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