Another hunting device, used for beavers, otters, and wolves, was the deadfall.[54] One variety was made by piling up a large number of rocks, designed to fall on the animal which entered the trap.[55] This style of trap was used because these were animals capable of gnawing their way out of a trap that left them alive.[56] Apparently allied to hunting, at least in part, was the practice of setting fire to the woods at intervals, in order to burn out the undergrowth.[57] Where this was not done the woods were difficult to travel through, and thick scrub would have hampered deer drives considerably.[58] =Marine Hunting=: Marine hunting was not a major activity of the Wampanoags as it was of the Indian groups further to the north; however, it was practiced to some extent. Seals were taken as they napped on rocks in the warm sun.[58] Various species of whale were also common along the more exposed coasts, but it is not known if the Wampanoags actually hunted them in boats. They did make use of both the flesh and the oil of those that were cast up on the beaches.[59] =Fishing=: Fish were a major dietary item in the spring and continued to be of importance during the remainder of the year. Both fresh and salt water fish were taken. These included: bass, bream, cod, mackerel, flatfish,[60] skate, haddock, striped bass, sturgeon, Atlantic salmon, shad, herring, frostfish,[61] eels, lampreys, trout, roach, dace, pike, perch, catfish and pickerel.[62] Of these the salmon, trout, shad, herring, bass, and sturgeon run up the fresh water streams from the sea.[63] Trout, roach, dace, pike, perch, catfish, and pickerel are fresh water species only.[64] Techniques for catching fish varied with the circumstances.[65] The hook and line apparently came in for a good deal of use.[66] However, the only specific fish for which its use is mentioned are bass and cod.[67] To take these fish, the hooks were baited with lobsters.[68] Probably the hook and line was used for ice fishing during the winter, and if so it was also used for pike, perch, bream, and pickerel.[69] Nets were used to take sturgeon.[70] Nets were placed across rivers at the falls to take bass. The trapped fish were then shot with arrows or speared.[71] Bass were also caught in weirs.[72] The tending of nets went on at night as well as during the day, the fishermen resting on the shore near small fires until it was time to check their nets.[73] Sturgeon were also taken at night—using a different technique. A torch was waved about over the side of the canoe to lure the fish. When the fish came near, an Indian in the canoe would drive a harpoon into his belly. Thus secured, the struggling fish was dragged back to shore.[74] The method of taking eels was to wade into the water, tread them out of the mud with the feet, then grab them.[75] DOMESTICATED ANIMALS