Another modern method of fishing which mi^ht prove practical 

 in the coral reefs ic the trammel net. Ihe trial of this e;ear in 

 Philippine waters is highly recommended. 



The following description of the gear and its operation 



may have to be modified to suit local conditions and is appended 



here merely as a guide end basis for the initial stages of its 

 trial OTDeration: -2/ 



The vessel for this gear averages 35 feet in length, has 

 a beam of 8 to 10 feet, and an average tonnage of from k to 3 net. 

 Each is powered with a gasoline or small Diesel engine located amid- 

 shit) below the deck. Sleeping accomodations for two or three men 

 and' cooking anparatuB on deck, or in the small pilot house shcald 

 be provided. A small skiff is carried on deck, \i8ually amidship 

 beside the pilot house, '^he nets, buoys, anchors and lines are 

 usually piled on the afterdeck. 



Trammel nets (fig. ?) are made by hangiiag three webs to 

 a single ton and bottom lines. There are two outside vfebs or walls 

 (this netting is called "walling" or "guard" mesh) &nd in inside web 

 of small mesh. The outside webs are larger-sized mesh, generally 

 three times the size of the mesh of the center net but usually eight 

 inches square and made of cotton. The inside web, which hangs 

 loosely in the middle between the walls, is of smaller mesh, the 

 size depending upon the fish to be caught and is made of either 

 cotton or linen. Ihe nets are so constructed that a fish striking 

 either side passes through the larger mesh, hits the small-meshed 

 net, through which it cannot pass, causing the loose, small-meshed 

 net to go through one of the openings of the opposite outer webbing 

 to form a sack in which the fish is entrapped. The weight and 

 struggles of the fish cause the open end of the bag to rest against 

 the twine of the wider guard mesh, closing the opening (fig. 8). 



Ihe -orinciple of this net is such that it mast be made 

 with the inside web veiy full, so there will be enough webbing to 

 nocket all the fish that come along. If the inside web is scant, 

 as soon as a few fish are trapped, the inside netting all aroxind 

 the pocket is stretched tight and no more fish can "pocket." It is, 

 therefore, very essential that the inside web be very full, that is, 

 it must be very much longer f:nd wider than the two outer meshes. 

 The usual practice is to hang 2^ inches or even 30 inches of web 

 on 12 inches of cork and leadline. 



An outfit carries from 10 to 50 pieces of trammel net. 

 A niece varies in length from 35 to UO fathoms (210 to 2^ feet) ; 

 and from 25 to 30 meshes deep, measured on the wall (outside) nets. 



Jj Fish Bulletin (1931) No. 32, po. 1^4-13, Division of Fish and 

 Game of California, Bureau of Commerical Fisheries. 



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